cascardo/linux.git
7 years agoMerge tag 'v4.8-rockchip-dts64-1' of git://git.kernel.org/pub/scm/linux/kernel/git...
Olof Johansson [Thu, 7 Jul 2016 05:23:27 +0000 (22:23 -0700)]
Merge tag 'v4.8-rockchip-dts64-1' of git://git./linux/kernel/git/mmind/linux-rockchip into next/dt64

The rk3399 gets support for its emmc controller as well as thermal,
i2c and core io-domain nodes and some reasonable default rates
for core clocks. The rk3368 also gets io-domains for its r88 board
as well as a small fix for the gic's memory regions.

* tag 'v4.8-rockchip-dts64-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mmind/linux-rockchip:
  arm64: dts: rockchip: add ap_pwroff and ddrio_pwroff pins for rk3399
  arm64: dts: rockchip: Provide emmcclk to PHY for rk3399
  arm64: dts: rockchip: Add soc-ctl-syscon to sdhci for rk3399
  arm64: dts: rockchip: fixes the gic400 2nd region size for rk3368
  arm64: dts: rockchip: add i2c nodes for rk3399
  arm64: dts: rockchip: add thermal nodes for rk3399 SoCs
  arm64: dts: rockchip: add rk3399 io-domain core nodes
  arm64: dts: rockchip: add rk3368-r88 iodomains
  arm64: dts: rockchip: add rk3368 io-domain core nodes
  arm64: dts: rockchip: make rk3368 grf syscons simple-mfds
  arm64: dts: rockchip: enable eMMC for rk3399 EVB
  arm64: dts: rockchip: add sdhci/emmc for rk3399
  arm64: dts: rockchip: make rk3399's grf a "simple-mfd"
  arm64: dts: rockchip: assign default rates for core rk3399 clocks

Signed-off-by: Olof Johansson <olof@lixom.net>
7 years agoMerge tag 'hi6220-dt-for-4.8' of git://github.com/hisilicon/linux-hisi into next...
Olof Johansson [Wed, 6 Jul 2016 04:47:46 +0000 (21:47 -0700)]
Merge tag 'hi6220-dt-for-4.8' of git://github.com/hisilicon/linux-hisi into next/dt64

ARM64: DT: Hisilicon Hi6220 hikey board updates for 4.8

- name the GPIO lines

* tag 'hi6220-dt-for-4.8' of git://github.com/hisilicon/linux-hisi:
  arm64: dts: hikey: name the GPIO lines

Signed-off-by: Olof Johansson <olof@lixom.net>
7 years agoMerge tag 'imx-dt64-4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/shawnguo...
Olof Johansson [Wed, 6 Jul 2016 04:10:09 +0000 (21:10 -0700)]
Merge tag 'imx-dt64-4.8' of git://git./linux/kernel/git/shawnguo/linux into next/dt64

The Freescale arm64 device tree updates for 4.8:
 - Update address-cells and reg properties of cpu nodes, considering
   MPIDR_EL1[63:32] bits are not used for CPUs identification on ls1043a
   and ls2080a
 - Adds the cache nodes and next-level-cache property for ls1043a and
   ls2080a to get cacheinfo work on these platforms
 - Add dma-coherent for ls1043a PCI nodes to utilize the hardware
   capability on data coherency
 - Add dis_rxdet_inp3_quirk property for USB3 device to disable rx
   detection in P3 PHY mode

* tag 'imx-dt64-4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/shawnguo/linux:
  arm64: dts: ls2080a: Add cache nodes for cacheinfo support
  arm64: dts: ls1043a: Add cache nodes for cacheinfo support
  arm64: dts: ls1043a: Add 'dma-coherent' for ls1043a PCI nodes
  bindings: PCI: layerscape: Add 'dma-coherent' property
  arm64: dts: ls1043a: Add dis_rxdet_inp3_quirk property to USB3 node
  arm64: dts: ls2080a: Add dis_rxdet_inp3_quirk property to USB3 node
  arm64: dts: fsl: Update address-cells and reg properties of cpu nodes

Signed-off-by: Olof Johansson <olof@lixom.net>
7 years agoMerge tag 'qcom-arm64-for-4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/agros...
Olof Johansson [Tue, 5 Jul 2016 05:24:30 +0000 (22:24 -0700)]
Merge tag 'qcom-arm64-for-4.8' of git://git./linux/kernel/git/agross/linux into next/dt64

Qualcomm ARM64 Updates for v4.8

* Enable assorted peripherals on APQ8016 SBC
* Update reserved memory on MSM8916
* Add MSM8996 peripheral support
* Add SCM firmware node on MSM8916
* Add PMU node on MSM8916
* Add PSCI cpuidle support on MSM8916

* tag 'qcom-arm64-for-4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/agross/linux: (22 commits)
  arm64: dts: msm8996: add sdc2 support
  arm64: dts: msm8996: add sdc2 pinctrl
  arm64: dts: msm8996: add support to blsp2_spi5
  arm64: dts: msm8996: add support to blsp2_spi5 pinctrl
  arm64: dts: msm8996: add support to blsp1_spi0
  arm64: dts: msm8996: add support to blsp1_spi0 pinctrl
  arm64: dts: msm8996: add support to blsp2_i2c0
  arm64: dts: msm8996: add support to blsp2_i2c0 pinctrl
  arm64: dts: msm8996: add support to blsp2_i2c1
  arm64: dts: msm8996: add blsp2_i2c1 pinctrl
  arm64: dts: msm8996: add support to blsp1_i2c2 device
  arm64: dts: msm8996: add blsp1_i2c2 pinctrl nodes.
  arm64: dts: msm8996: add support blsp2_uart2
  arm64: dts: msm8996: add blsp2_uart2 pinctrl nodes.
  arm64: dts: msm8996: add blsp2_uart1 pinctrl
  arm64: dts: msm8996: add msmgpio label
  ARM: dts: msm8916: Update reserved-memory
  arm64: dts: msm8916: Add SCM firmware node
  arm64: dts: qcom: Add msm8916 PMU node
  ARM64: dts: Add PSCI cpuidle support for MSM8916
  ...

Signed-off-by: Olof Johansson <olof@lixom.net>
7 years agoMerge tag 'xgene-dts-for-v4.8-part1' of https://github.com/AppliedMicro/xgene-next...
Olof Johansson [Tue, 5 Jul 2016 04:33:31 +0000 (21:33 -0700)]
Merge tag 'xgene-dts-for-v4.8-part1' of https://github.com/AppliedMicro/xgene-next into next/dt64

First part of X-Gene DTS changes queued for v4.8

The changes include:
+ 2 clean-up and style-fix patches from Bjorn
+ Correct timer interrupt polarity for X-Gene 2
+ Remove unused qmlclk node on X-Gene 1

* tag 'xgene-dts-for-v4.8-part1' of https://github.com/AppliedMicro/xgene-next:
  arm64: dts: apm: Remove unused qmlclk node on X-Gene 1
  arm64: dts: apm: Fix timer interrupt polarity for X-Gene 2 SoC
  arm64: dts: apm: Remove leading '0x' from unit addresses
  arm64: dts: apm: Use lowercase consistently for hex constants

Signed-off-by: Olof Johansson <olof@lixom.net>
7 years agoarm64: dts: hikey: name the GPIO lines
Linus Walleij [Thu, 23 Jun 2016 23:06:04 +0000 (01:06 +0200)]
arm64: dts: hikey: name the GPIO lines

This names the GPIO lines on the HiKey board in accordance with
the 96Board Specification for especially the Low Speed External
Connector: "GPIO-A" thru "GPIO-L".

This will make these line names reflect through to userspace
so that they can easily be identified and used with the new
character device ABI.

Some care has been taken to name all lines, not just those used
by the external connectors, also lines that are muxed into some
other function than GPIO: these are named "[FOO]" so that users
can see with lsgpio what all lines are used for.

Cc: devicetree@vger.kernel.org
Cc: John Stultz <john.stultz@linaro.org>
Cc: Rob Herring <robh@kernel.org>
Cc: David Mandala <david.mandala@linaro.org>
Cc: Haojian Zhuang <haojian.zhuang@linaro.org>
Cc: Wei Xu <xuwei5@hisilicon.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Wei Xu <xuwei5@hisilicon.com>
7 years agoarm64: dts: rockchip: add ap_pwroff and ddrio_pwroff pins for rk3399
Douglas Anderson [Tue, 14 Jun 2016 20:21:11 +0000 (13:21 -0700)]
arm64: dts: rockchip: add ap_pwroff and ddrio_pwroff pins for rk3399

There are two sleep related pins on rk3399: ap_pwroff and ddrio_pwroff.
Let's add the definition of these two pins to rk3399's main dtsi file so
that boards can use them.

These two pins are similar to the global_pwroff and ddrio_pwroff pins in
rk3288 and are expected to be used in the same way: boards will likely
want to configure these pinctrl settings in their global pinctrl hog
list.

Note that on rk3288 there were two additional pins in the "sleep"
section: "ddr0_retention" and "ddr1_retention".  On rk3288 designs these
pins appeared to actually route from rk3288 back to rk3288.  Presumably
on rk3399 this is simply not needed since the pins don't appear to exist
there.

Signed-off-by: Douglas Anderson <dianders@chromium.org>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
7 years agoarm64: dts: msm8996: add sdc2 support
Srinivas Kandagatla [Tue, 21 Jun 2016 17:39:53 +0000 (18:39 +0100)]
arm64: dts: msm8996: add sdc2 support

This patch adds support to sdc2 sdhci controller, which is used on some
of the boards.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Andy Gross <andy.gross@linaro.org>
7 years agoarm64: dts: msm8996: add sdc2 pinctrl
Srinivas Kandagatla [Fri, 17 Jun 2016 15:14:12 +0000 (16:14 +0100)]
arm64: dts: msm8996: add sdc2 pinctrl

This patch adds pinctrl required for sdhci for external sd card
controller.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Andy Gross <andy.gross@linaro.org>
7 years agoarm64: dts: msm8996: add support to blsp2_spi5
Srinivas Kandagatla [Fri, 17 Jun 2016 15:14:11 +0000 (16:14 +0100)]
arm64: dts: msm8996: add support to blsp2_spi5

This patch adds support to blsp2_spi5 device, which is used in some of
the APQ8096 based boards.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Andy Gross <andy.gross@linaro.org>
7 years agoarm64: dts: msm8996: add support to blsp2_spi5 pinctrl
Srinivas Kandagatla [Fri, 17 Jun 2016 15:14:10 +0000 (16:14 +0100)]
arm64: dts: msm8996: add support to blsp2_spi5 pinctrl

This patch adds pinctrl required for blsp2_spi5 device.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Andy Gross <andy.gross@linaro.org>
7 years agoarm64: dts: msm8996: add support to blsp1_spi0
Srinivas Kandagatla [Fri, 17 Jun 2016 15:14:09 +0000 (16:14 +0100)]
arm64: dts: msm8996: add support to blsp1_spi0

This patch adds support to blsp1_spi0 which is used on some of APQ8096
based boards.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Andy Gross <andy.gross@linaro.org>
7 years agoarm64: dts: msm8996: add support to blsp1_spi0 pinctrl
Srinivas Kandagatla [Fri, 17 Jun 2016 15:14:08 +0000 (16:14 +0100)]
arm64: dts: msm8996: add support to blsp1_spi0 pinctrl

This patch adds pinctrl nodes required for blsp1_spi0.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Andy Gross <andy.gross@linaro.org>
7 years agoarm64: dts: msm8996: add support to blsp2_i2c0
Srinivas Kandagatla [Fri, 17 Jun 2016 15:14:07 +0000 (16:14 +0100)]
arm64: dts: msm8996: add support to blsp2_i2c0

This patch adds support to blsp2_i2c0, which is used on some of the
APQ8096 based boards.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Andy Gross <andy.gross@linaro.org>
7 years agoarm64: dts: msm8996: add support to blsp2_i2c0 pinctrl
Srinivas Kandagatla [Fri, 17 Jun 2016 15:14:06 +0000 (16:14 +0100)]
arm64: dts: msm8996: add support to blsp2_i2c0 pinctrl

This patch adds support to blsp2_i2c0 pinctrl.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Andy Gross <andy.gross@linaro.org>
7 years agoarm64: dts: msm8996: add support to blsp2_i2c1
Srinivas Kandagatla [Fri, 17 Jun 2016 15:14:05 +0000 (16:14 +0100)]
arm64: dts: msm8996: add support to blsp2_i2c1

This patch adds support to blsp2_i2c1, which is used in one of the
apq8096 based boards.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Andy Gross <andy.gross@linaro.org>
7 years agoarm64: dts: msm8996: add blsp2_i2c1 pinctrl
Srinivas Kandagatla [Fri, 17 Jun 2016 15:14:04 +0000 (16:14 +0100)]
arm64: dts: msm8996: add blsp2_i2c1 pinctrl

This patch adds support to blsp2_i2c1 pinctrl nodes.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Andy Gross <andy.gross@linaro.org>
7 years agoarm64: dts: msm8996: add support to blsp1_i2c2 device
Srinivas Kandagatla [Fri, 17 Jun 2016 15:14:03 +0000 (16:14 +0100)]
arm64: dts: msm8996: add support to blsp1_i2c2 device

This patch adds blsp1_i2c2 support, as this bus is used on some of the
apq8096 boards.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Andy Gross <andy.gross@linaro.org>
7 years agoarm64: dts: msm8996: add blsp1_i2c2 pinctrl nodes.
Srinivas Kandagatla [Fri, 17 Jun 2016 15:14:02 +0000 (16:14 +0100)]
arm64: dts: msm8996: add blsp1_i2c2 pinctrl nodes.

This patch adds pinctrl nodes required for blsp1_i2c2.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Andy Gross <andy.gross@linaro.org>
7 years agoarm64: dts: msm8996: add support blsp2_uart2
Srinivas Kandagatla [Fri, 17 Jun 2016 15:14:01 +0000 (16:14 +0100)]
arm64: dts: msm8996: add support blsp2_uart2

This patch adds bslp2_uart2 node in soc so that boards that use this
uart can enable it.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Andy Gross <andy.gross@linaro.org>
7 years agoarm64: dts: msm8996: add blsp2_uart2 pinctrl nodes.
Srinivas Kandagatla [Fri, 17 Jun 2016 15:14:00 +0000 (16:14 +0100)]
arm64: dts: msm8996: add blsp2_uart2 pinctrl nodes.

This patch adds blsp2_uart2 pinctrl nodes.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Andy Gross <andy.gross@linaro.org>
7 years agoarm64: dts: msm8996: add blsp2_uart1 pinctrl
Srinivas Kandagatla [Fri, 17 Jun 2016 15:13:59 +0000 (16:13 +0100)]
arm64: dts: msm8996: add blsp2_uart1 pinctrl

This patch adds 2pin and 4 pin uart pinctrl support for blsp2_uart1

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Andy Gross <andy.gross@linaro.org>
7 years agoarm64: dts: msm8996: add msmgpio label
Srinivas Kandagatla [Fri, 17 Jun 2016 15:13:58 +0000 (16:13 +0100)]
arm64: dts: msm8996: add msmgpio label

This patch adds msmgpio label for pin and gpio controller so that
it can referenced in dedicated pins file and other board level gpios.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Andy Gross <andy.gross@linaro.org>
7 years agoarm64: dts: rockchip: Provide emmcclk to PHY for rk3399
Douglas Anderson [Mon, 20 Jun 2016 17:56:54 +0000 (10:56 -0700)]
arm64: dts: rockchip: Provide emmcclk to PHY for rk3399

Previous changes in this series allowed exposing the card clock from the
rk3399 SDHCI device and allowed consuming the card clock in the rk3399
eMMC PHY.  Hook things up in the main rk3399 dtsi file.

Signed-off-by: Douglas Anderson <dianders@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
7 years agoarm64: dts: rockchip: Add soc-ctl-syscon to sdhci for rk3399
Douglas Anderson [Mon, 20 Jun 2016 17:56:48 +0000 (10:56 -0700)]
arm64: dts: rockchip: Add soc-ctl-syscon to sdhci for rk3399

On rk3399 we'd like to be able to properly set corecfg registers in the
Arasan SDHCI component.  Specify the syscon to enable that.

Signed-off-by: Douglas Anderson <dianders@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
7 years agoarm64: dts: ls2080a: Add cache nodes for cacheinfo support
Li Yang [Thu, 16 Jun 2016 23:35:04 +0000 (18:35 -0500)]
arm64: dts: ls2080a: Add cache nodes for cacheinfo support

Adds the cache nodes and next-level-cache property for the
cacheinfo to work.

Signed-off-by: Li Yang <leoyang.li@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
7 years agoarm64: dts: ls1043a: Add cache nodes for cacheinfo support
Li Yang [Thu, 16 Jun 2016 23:35:03 +0000 (18:35 -0500)]
arm64: dts: ls1043a: Add cache nodes for cacheinfo support

Adds the cache nodes and next-level-cache property for the
cacheinfo to work.

Signed-off-by: Li Yang <leoyang.li@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
7 years agoarm64: dts: apm: Remove unused qmlclk node on X-Gene 1
Duc Dang [Tue, 21 Jun 2016 01:41:49 +0000 (18:41 -0700)]
arm64: dts: apm: Remove unused qmlclk node on X-Gene 1

Node qmlclk has no consumer, so remove it.

Signed-off-by: Duc Dang <dhdang@apm.com>
7 years agoarm64: dts: apm: Fix timer interrupt polarity for X-Gene 2 SoC
Duc Dang [Tue, 21 Jun 2016 01:26:35 +0000 (18:26 -0700)]
arm64: dts: apm: Fix timer interrupt polarity for X-Gene 2 SoC

Correct X-Gene 2 timer interrupt polarity as low-level triggered.

Signed-off-by: Duc Dang <dhdang@apm.com>
7 years agoarm64: dts: apm: Remove leading '0x' from unit addresses
Bjorn Helgaas [Tue, 14 Jun 2016 13:00:30 +0000 (08:00 -0500)]
arm64: dts: apm: Remove leading '0x' from unit addresses

Unit addresses should not have a leading '0x'.  Remove them.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Duc Dang <dhdang@apm.com>
7 years agoarm64: dts: apm: Use lowercase consistently for hex constants
Bjorn Helgaas [Tue, 14 Jun 2016 13:00:20 +0000 (08:00 -0500)]
arm64: dts: apm: Use lowercase consistently for hex constants

The convention in these files is to use lowercase for "0x" prefixes and for
the hex constants themselves, but a few changes didn't follow that
convention, which makes the file annoying to read.

Use lowercase consistently for the hex constants.  No functional change
intended.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Duc Dang <dhdang@apm.com>
7 years agoMerge tag 'arm-soc/for-4.8/devicetree-arm64' of http://github.com/Broadcom/stblinux...
Olof Johansson [Mon, 20 Jun 2016 05:48:17 +0000 (22:48 -0700)]
Merge tag 'arm-soc/for-4.8/devicetree-arm64' of github.com/Broadcom/stblinux into next/dt64

This pull request contains Device Tree changes for Broadcom ARM64-based SoCS:

- Anup adds nodes for the AHCI and SATA3 PHY peripherals to the Northstar2 SoCs

- Dhanajay enables pinctrl for the Northstar2 SoCs

- Jon Mason enables all of the UART peripherals found in the NS2 SVK and
  finally adds the CCI-400 and PMU nodes

* tag 'arm-soc/for-4.8/devicetree-arm64' of http://github.com/Broadcom/stblinux:
  arm64: dts: NS2: Add CCI-400 PMU support
  arm64: dts: NS2: Add all of the UARTs
  arm64: dts: Enable GPIO for Broadcom NS2 SoC
  arm64: dts: enable pinctrl for Broadcom NS2 SoC
  arm64: dts: Add SATA3 AHCI and SATA3 PHY DT nodes for NS2
  dt-bindings: ata: add compatible string for iProc AHCI controller

Signed-off-by: Olof Johansson <olof@lixom.net>
7 years agoMerge tag 'amlogic-dt64' of git://git.kernel.org/pub/scm/linux/kernel/git/khilman...
Olof Johansson [Mon, 20 Jun 2016 05:30:16 +0000 (22:30 -0700)]
Merge tag 'amlogic-dt64' of git://git./linux/kernel/git/khilman/linux-amlogic into next/dt64

Amlogic DT 64-bit changes for v4.8
- add pinctrl driver and pins for several devices
- add reset driver

* tag 'amlogic-dt64' of git://git.kernel.org/pub/scm/linux/kernel/git/khilman/linux-amlogic:
  ARM64: dts: amlogic: Enable Reset Controller on GXBB-based platforms
  ARM64: dts: amlogic: gxbb: add ethernet
  ARM64: dts: amlogic: gxbb: pinctrl: add/update UART
  ARM64: dts: amlogic: add pins for EMMC, SD
  ARM64: dts: amlogic: Enable pin controller on GXBB-based platforms
  documentation: Add compatibles for Amlogic Meson GXBB pin controllers
  ARM64: dts: amlogic: Add hiu and periphs buses

Signed-off-by: Olof Johansson <olof@lixom.net>
7 years agoarm64: dts: rockchip: fixes the gic400 2nd region size for rk3368
Caesar Wang [Wed, 18 May 2016 14:41:50 +0000 (22:41 +0800)]
arm64: dts: rockchip: fixes the gic400 2nd region size for rk3368

The 2nd additional region is the GIC virtual cpu interface register
base and size.

As the gic400 of rk3368 says, the cpu interface register map as below

:

-0x0000 GICC_CTRL
.
.
.
-0x00fc GICC_IIDR
-0x1000 GICC_IDR

Obviously, the region size should be greater than 0x1000.
So we should make sure to include the GICC_IDR since the kernel will access
it in some cases.

Fixes: b790c2cab5ca ("arm64: dts: add Rockchip rk3368 core dtsi and board dts for the r88 board")
Signed-off-by: Caesar Wang <wxt@rock-chips.com>
Reviewed-by: Shawn Lin <shawn.lin@rock-chips.com>
Cc: stable@vger.kernel.org
[added Fixes and stable-cc]
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
7 years agoarm64: dts: rockchip: add i2c nodes for rk3399
David Wu [Mon, 16 May 2016 20:09:31 +0000 (13:09 -0700)]
arm64: dts: rockchip: add i2c nodes for rk3399

We've got 9 (count em!) i2c controllers on rk3399, some of which are in
the PMU power domain and some of which are normal peripherals.  Add them
all to the main rk3399 dtsi file so future patches can turn them on in
the board dts files.

Note: by default we try to set the i2c clock rate to 200 MHz so that we
can achieve good i2c functional clock rates.  200 MHz gives us the
ability to make very close to 100 kHz / 400 kHz / 1 MHz rates.  If
boards want to tune clock rates further they can always override.
Possibly boards could want to tune this if:
- they wanted to save an infinitesimal amount of power and they knew
  their i2c bus was slow anyway.  Since we gate the functional clock
  when the i2c bus is not active, power savings would only be while i2c
  transfers were happening and probably won't be very big anyway.
- they wanted to eek out a bit more speed by carefully tuning the source
  clock to make divisions work out perfectly, accounting for the rise /
  fall time measured on an actual board.

Note also that we still request 200 MHz for the PMU i2c busses even
though we expect that we won't make that exactly (currently PPLL is 676
MHz which gives us 169 MHz).

Signed-off-by: David Wu <david.wu@rock-chips.com>
Signed-off-by: Jianqun Xu <jay.xu@rock-chips.com>
[dianders: wrote desc; put in assigned-clocks; reordered nodes]
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
7 years agoarm64: dts: ls1043a: Add 'dma-coherent' for ls1043a PCI nodes
Liu Gang [Tue, 7 Jun 2016 06:55:46 +0000 (14:55 +0800)]
arm64: dts: ls1043a: Add 'dma-coherent' for ls1043a PCI nodes

The 'dma-coherent' indicates that the hardware IP block can ensure
the coherency of the data transferred from/to the IP block. This
can avoid the software cache flush/invalid actions, and improve
the performance significantly.

The PCI IP block of ls1043a has this capability, so adding this
feature to improve the PCI performance.

Signed-off-by: Liu Gang <Gang.Liu@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
7 years agobindings: PCI: layerscape: Add 'dma-coherent' property
Liu Gang [Tue, 7 Jun 2016 06:55:45 +0000 (14:55 +0800)]
bindings: PCI: layerscape: Add 'dma-coherent' property

Add 'dma-coherent' description for PCI nodes.

The 'dma-coherent' indicates that the hardware IP block can ensure
the coherency of the data transferred from/to the IP block. This
can avoid the software cache flush/invalid actions, and improve
the performance significantly.

The PCI IP block of ls1043a has this capability, so adding
this feature to improve the PCI performance.

Signed-off-by: Liu Gang <Gang.Liu@nxp.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
7 years agoarm64: dts: uniphier: add /memreserve/ for spin-table release address
Masahiro Yamada [Tue, 14 Jun 2016 03:01:43 +0000 (12:01 +0900)]
arm64: dts: uniphier: add /memreserve/ for spin-table release address

As Documentation/arm64/booting.txt says, the cpu-release-addr
location should be reserved.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Olof Johansson <olof@lixom.net>
7 years agoarm64: dts: uniphier: change cpu-release-address
Masahiro Yamada [Tue, 14 Jun 2016 03:01:42 +0000 (12:01 +0900)]
arm64: dts: uniphier: change cpu-release-address

At first, 256 byte of the head of DRAM space was reserved for some
reasons.  However, as the progress of development, it turned out
unnecessary, and it was never used in the end.  Move the CPU release
address to leave no space.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Olof Johansson <olof@lixom.net>
7 years agoarm64: dts: uniphier: add SoC-Glue node to UniPhier 64bit SoCs
Masahiro Yamada [Tue, 14 Jun 2016 03:01:41 +0000 (12:01 +0900)]
arm64: dts: uniphier: add SoC-Glue node to UniPhier 64bit SoCs

This node consists of various system-level configuration registers.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Olof Johansson <olof@lixom.net>
7 years agoMerge tag 'renesas-arm64-dt-for-v4.8' of git://git.kernel.org/pub/scm/linux/kernel...
Olof Johansson [Mon, 13 Jun 2016 22:29:12 +0000 (15:29 -0700)]
Merge tag 'renesas-arm64-dt-for-v4.8' of git://git./linux/kernel/git/horms/renesas into next/dt64

Renesas ARM64 Based SoC DT Updates for v4.8

* Fix W=1 dtc warnings and other cleanups
* Enable watchdog timer
* Enable DMA for I2C
* Increase the size of GIC-400 mapped registers: be nicer to hypervisors
* Support RTS/CTS hardware flow control

* tag 'renesas-arm64-dt-for-v4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas:
  arm64: dts: r8a7795: Drop 0x from unit address of gic
  arm64: dts: salvator-x: Fix W=1 dtc warnings
  arm64: dts: r8a7795: Fix W=1 dtc warnings
  arm64: dts: r8a7795: Use SYSC "always-on" PM Domain for RWDT node
  arm64: dts: salvator-x: Enable watchdog timer
  arm64: dts: r8a7795: Add RWDT node
  arm64: dts: r8a7795: enable DMA for I2C
  arm64: dts: r8a7795: Increase the size of GIC-400 mapped registers
  arm64: dts: salvator-x: SCIF1 supports RTS/CTS hardware flow control

Signed-off-by: Olof Johansson <olof@lixom.net>
7 years agoARM: dts: msm8916: Update reserved-memory
Bjorn Andersson [Tue, 7 Jun 2016 00:57:24 +0000 (17:57 -0700)]
ARM: dts: msm8916: Update reserved-memory

Update reserved-memory in accordance with memory the detailed memory map
for 8916, so that we will be able to reference the firmware memory
regions.

Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Andy Gross <andy.gross@linaro.org>
7 years agoarm64: dts: msm8916: Add SCM firmware node
Andy Gross [Fri, 3 Jun 2016 23:25:28 +0000 (18:25 -0500)]
arm64: dts: msm8916: Add SCM firmware node

This adds the devicetree node for the SCM firmware.

Acked-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Andy Gross <andy.gross@linaro.org>
Reviewed-by: Stephen Boyd <sboyd@codeaurora.org>
7 years agoarm64: dts: qcom: Add msm8916 PMU node
Stephen Boyd [Tue, 10 May 2016 22:01:49 +0000 (15:01 -0700)]
arm64: dts: qcom: Add msm8916 PMU node

Add the PMU so we can get proper perf event support on this SoC.

Signed-off-by: Stephen Boyd <stephen.boyd@linaro.org>
Signed-off-by: Andy Gross <andy.gross@linaro.org>
7 years agoARM64: dts: Add PSCI cpuidle support for MSM8916
Lina Iyer [Tue, 1 Mar 2016 21:15:30 +0000 (14:15 -0700)]
ARM64: dts: Add PSCI cpuidle support for MSM8916

Add device bindings for CPUs to suspend using PSCI as the enable-method.

Cc: <devicetree@vger.kernel.org>
Signed-off-by: Lina Iyer <lina.iyer@linaro.org>
Tested-by: Andy Gross <andy.gross@linaro.org>
Signed-off-by: Andy Gross <andy.gross@linaro.org>
7 years agoarm64: dts: qcom: apq8016-sbc: enable bam dma node.
Srinivas Kandagatla [Tue, 23 Feb 2016 16:50:45 +0000 (16:50 +0000)]
arm64: dts: qcom: apq8016-sbc: enable bam dma node.

This patch enables bam dma node, dma is used for both tx and rx on spi
and on high speed serial.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Andy Gross <andy.gross@linaro.org>
7 years agoarm64: dts: apq8016-sbc: Add DT node for the uSD SDHC interface
Georgi Djakov [Thu, 4 Feb 2016 12:53:22 +0000 (14:53 +0200)]
arm64: dts: apq8016-sbc: Add DT node for the uSD SDHC interface

Add the necessary properties to enable the SD-card on db410c boards.

Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org>
Tested-by: Kevin Hilman <khilman@baylibre.com>
Signed-off-by: Andy Gross <andy.gross@linaro.org>
7 years agoarm64: dts: ls1043a: Add dis_rxdet_inp3_quirk property to USB3 node
Rajesh Bhagat [Fri, 10 Jun 2016 06:23:46 +0000 (11:53 +0530)]
arm64: dts: ls1043a: Add dis_rxdet_inp3_quirk property to USB3 node

Add "dis_rxdet_inp3_quirk" boolean property to USB3 node. This property
is used to disable rx detection in P3 PHY mode.

Signed-off-by: Rajesh Bhagat <rajesh.bhagat@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
7 years agoarm64: dts: ls2080a: Add dis_rxdet_inp3_quirk property to USB3 node
Rajesh Bhagat [Fri, 10 Jun 2016 06:23:45 +0000 (11:53 +0530)]
arm64: dts: ls2080a: Add dis_rxdet_inp3_quirk property to USB3 node

Add "dis_rxdet_inp3_quirk" boolean property to USB3 node. This property
is used to disable rx detection in P3 PHY mode.

Signed-off-by: Rajesh Bhagat <rajesh.bhagat@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
7 years agoarm64: dts: fsl: Update address-cells and reg properties of cpu nodes
Alison Wang [Mon, 9 May 2016 09:06:15 +0000 (17:06 +0800)]
arm64: dts: fsl: Update address-cells and reg properties of cpu nodes

MPIDR_EL1[63:32] value is equal to 0 for the CPUs of the LS1043A and
LS2080A SoCs. The ARM CPU binding allows #address-cells to be set to 1,
since MPIDR_EL1[63:32] bits are not used for CPUs identification. Update
the #address-cells and reg properties accordingly.

Signed-off-by: Alison Wang <alison.wang@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
7 years agoarm64: dts: rockchip: add thermal nodes for rk3399 SoCs
Caesar Wang [Wed, 25 May 2016 07:39:35 +0000 (15:39 +0800)]
arm64: dts: rockchip: add thermal nodes for rk3399 SoCs

This adds thermal zone and tsadc nodes to rk3399 dtsi, rk3399 thermal
data is including the cpu and gpu sensor zone node.

The thermal zone node is the node containing all the required info
for describing a thermal zone, including its cooling device bindings.
The thermal zone node must contain, apart from its own properties, one
sub-node containing trip nodes and one sub-node containing all the zone
cooling maps.

The following is the parameter is introduced:
* polling-delay:
The maximum number of milliseconds to wait between polls

* polling-delay-passive:
The maximum number of milliseconds to wait between polls when performing
passive cooling.

* trips:
A sub-node which is a container of only trip point nodes required to
describe the thermal zone.

* cooling-maps:
A sub-node which is a container of only cooling device map nodes, used to
describe the relation between trips and cooling devices.

* cooling-device:
A phandle of a cooling device with its specifier, referring to which
cooling device is used in this cooling specifier binding. In the cooling
specifier, the first cell is the minimum cooling state and the second cell
is the maximum cooling state used in this map.

Signed-off-by: Caesar Wang <wxt@rock-chips.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
7 years agoarm64: dts: Add dts files for LG Electronics's lg1313 SoC
Chanho Min [Wed, 1 Jun 2016 01:39:58 +0000 (10:39 +0900)]
arm64: dts: Add dts files for LG Electronics's lg1313 SoC

Add dtsi file to support lg1313 SoC which based on Cortex-A53.
Also add dts file to support lg1312 reference board which based
on lg1313 SoC.

Signed-off-by: Chanho Min <chanho.min@lge.com>
Signed-off-by: Olof Johansson <olof@lixom.net>
7 years agoARM64: dts: amlogic: Enable Reset Controller on GXBB-based platforms
Neil Armstrong [Mon, 30 May 2016 13:27:17 +0000 (15:27 +0200)]
ARM64: dts: amlogic: Enable Reset Controller on GXBB-based platforms

Update DTSI file to add the reset controller node.

Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: Kevin Hilman <khilman@baylibre.com>
7 years agoARM64: dts: amlogic: gxbb: add ethernet
Kevin Hilman [Wed, 27 Apr 2016 23:58:25 +0000 (16:58 -0700)]
ARM64: dts: amlogic: gxbb: add ethernet

Add node for ethernet interface and pinctrl pins.
Enable on odroid-C2 and P20x boards.

Acked-by: Carlo Caione <carlo@endlessm.com>
Signed-off-by: Kevin Hilman <khilman@baylibre.com>
7 years agoARM64: dts: amlogic: gxbb: pinctrl: add/update UART
Kevin Hilman [Wed, 27 Apr 2016 23:12:28 +0000 (16:12 -0700)]
ARM64: dts: amlogic: gxbb: pinctrl: add/update UART

Add DT nodes for additional UARTs (UART B & C in EE domain) and add pins
for all EE domain UARTs.

Acked-by: Carlo Caione <carlo@endlessm.com>
Signed-off-by: Kevin Hilman <khilman@baylibre.com>
7 years agoARM64: dts: amlogic: add pins for EMMC, SD
Kevin Hilman [Tue, 26 Apr 2016 21:05:19 +0000 (14:05 -0700)]
ARM64: dts: amlogic: add pins for EMMC, SD

Acked-by: Carlo Caione <carlo@endlessm.com>
Signed-off-by: Kevin Hilman <khilman@baylibre.com>
7 years agoARM64: dts: amlogic: Enable pin controller on GXBB-based platforms
Carlo Caione [Mon, 2 May 2016 08:02:18 +0000 (10:02 +0200)]
ARM64: dts: amlogic: Enable pin controller on GXBB-based platforms

Update DTS and DTSI files to enable the pin controller. We also now
support the blinking blue LED on the Odroid-C2.

Signed-off-by: Carlo Caione <carlo@endlessm.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Kevin Hilman <khilman@baylibre.com>
7 years agodocumentation: Add compatibles for Amlogic Meson GXBB pin controllers
Carlo Caione [Mon, 2 May 2016 08:02:16 +0000 (10:02 +0200)]
documentation: Add compatibles for Amlogic Meson GXBB pin controllers

Add the two new compatibles for the Amlogic Meson GXBB pin controllers.

Signed-off-by: Carlo Caione <carlo@endlessm.com>
Signed-off-by: Kevin Hilman <khilman@baylibre.com>
7 years agoARM64: dts: amlogic: Add hiu and periphs buses
Carlo Caione [Sun, 3 Apr 2016 17:14:41 +0000 (19:14 +0200)]
ARM64: dts: amlogic: Add hiu and periphs buses

Add two new buses in the DTS: hiu and periphs buses.
In the Amlogic S905/GXBB SoC several devices (clock / eth / pin
controllers, etc...) are mapped under these two buses. Add them in the
DT before starting to add new devices.

Signed-off-by: Carlo Caione <carlo@endlessm.com>
Signed-off-by: Kevin Hilman <khilman@baylibre.com>
7 years agoarm64: dts: NS2: Add CCI-400 PMU support
Jon Mason [Wed, 11 May 2016 22:56:09 +0000 (18:56 -0400)]
arm64: dts: NS2: Add CCI-400 PMU support

Add support to the Northstar 2 Device tree file for the ARM CCI-400 PMU.

Signed-off-by: Jon Mason <jonmason@broadcom.com>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
7 years agoarm64: dts: NS2: Add all of the UARTs
Jon Mason [Wed, 11 May 2016 22:56:08 +0000 (18:56 -0400)]
arm64: dts: NS2: Add all of the UARTs

Add all of the UARTs present on NS2 and enable them in the SVK device
tree file.  Also, do some magic to make sure that uart3 is discovered as
ttyS0 (as that is the console UART).

Signed-off-by: Jon Mason <jonmason@broadcom.com>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
7 years agoarm64: dts: Enable GPIO for Broadcom NS2 SoC
Yendapally Reddy Dhananjaya Reddy [Fri, 4 Mar 2016 10:23:30 +0000 (05:23 -0500)]
arm64: dts: Enable GPIO for Broadcom NS2 SoC

This enables the GPIO support for Broadcom NS2 SoC

Signed-off-by: Yendapally Reddy Dhananjaya Reddy <yendapally.reddy@broadcom.com>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
7 years agoarm64: dts: enable pinctrl for Broadcom NS2 SoC
Yendapally Reddy Dhananjaya Reddy [Fri, 29 Apr 2016 12:51:39 +0000 (08:51 -0400)]
arm64: dts: enable pinctrl for Broadcom NS2 SoC

This enables the pinctrl support for Broadcom NS2 SoC

Signed-off-by: Yendapally Reddy Dhananjaya Reddy <yendapally.reddy@broadcom.com>
Reviewed-by: Ray Jui <ray.jui@broadcom.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
7 years agoarm64: dts: Add SATA3 AHCI and SATA3 PHY DT nodes for NS2
Anup Patel [Mon, 28 Mar 2016 04:48:30 +0000 (10:18 +0530)]
arm64: dts: Add SATA3 AHCI and SATA3 PHY DT nodes for NS2

We have one dual-port SATA3 AHCI controller present in
NS2 SoC.

This patch enables SATA3 AHCI controller and SATA3 PHY
for NS2 SoC in NS2 DT.

Signed-off-by: Anup Patel <anup.patel@broadcom.com>
Reviewed-by: Ray Jui <rjui@broadcom.com>
Reviewed-by: Scott Branden <sbranden@broadcom.com>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
7 years agodt-bindings: ata: add compatible string for iProc AHCI controller
Anup Patel [Mon, 28 Mar 2016 04:48:29 +0000 (10:18 +0530)]
dt-bindings: ata: add compatible string for iProc AHCI controller

The Broadcom iProc SoCs have AHCI compliant SATA controller. This
patch adds common compatible string for AHCI SATA controller on
iProc SoCs.

Signed-off-by: Anup Patel <anup.patel@broadcom.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
7 years agoarm64: dts: rockchip: add rk3399 io-domain core nodes
Heiko Stuebner [Sat, 21 May 2016 17:55:28 +0000 (19:55 +0200)]
arm64: dts: rockchip: add rk3399 io-domain core nodes

Add the core io-domain nodes to grf and pmugrf which individual
boards than just have to enable and add the necessary supplies to.

Signed-off-by: Heiko Stuebner <heiko@sntech.de>
7 years agoarm64: dts: rockchip: add rk3368-r88 iodomains
Heiko Stuebner [Wed, 29 Jul 2015 14:13:35 +0000 (16:13 +0200)]
arm64: dts: rockchip: add rk3368-r88 iodomains

Add the supply-links according to the R88 schematics.

Signed-off-by: Heiko Stuebner <heiko@sntech.de>
7 years agoarm64: dts: rockchip: add rk3368 io-domain core nodes
Heiko Stuebner [Sat, 21 May 2016 10:43:27 +0000 (12:43 +0200)]
arm64: dts: rockchip: add rk3368 io-domain core nodes

Add the core io-domain nodes to grf and pmugrf which individual
boards than just have to enable and add the necessary supplies to.

Signed-off-by: Heiko Stuebner <heiko@sntech.de>
7 years agoarm64: dts: rockchip: make rk3368 grf syscons simple-mfds
Heiko Stuebner [Mon, 1 Feb 2016 21:09:03 +0000 (22:09 +0100)]
arm64: dts: rockchip: make rk3368 grf syscons simple-mfds

The general register files do contain a lot of separate functions and
while some really are only registers with a lot of different 1-bit
settings, there are also a lot of them containing some bigger function
blocks. To be able to define these as sub-devices, make them simple-mfds.

Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Tested-by: David Wu <david.wu@rock-chips.com>
7 years agoarm64: dts: rockchip: enable eMMC for rk3399 EVB
Brian Norris [Fri, 13 May 2016 22:12:04 +0000 (15:12 -0700)]
arm64: dts: rockchip: enable eMMC for rk3399 EVB

Rockchip's rk3399 evaluation board has eMMC. Let's enable the
newly-added nodes.

Signed-off-by: Brian Norris <briannorris@chromium.org>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
7 years agoarm64: dts: rockchip: add sdhci/emmc for rk3399
Brian Norris [Fri, 13 May 2016 22:12:03 +0000 (15:12 -0700)]
arm64: dts: rockchip: add sdhci/emmc for rk3399

Add description for the SDHCI v5.1 eMMC controller on rk3399. Fix it to
200 MHz, to support all supported timing modes.

Note that 'rockchip,rk3399-sdhci-5.1' is not documented; we presumably
have a compliant Arasan controller, but let's have a rockchip property
as the canonical backup/precautionary measure. Per Heiko's previous
suggestion, let's not clutter the arasan doc with it.

Signed-off-by: Brian Norris <briannorris@chromium.org>
Reviewed-by: Shawn Lin <shawn.lin@rock-chips.com>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
7 years agoarm64: dts: rockchip: make rk3399's grf a "simple-mfd"
Brian Norris [Fri, 13 May 2016 22:12:02 +0000 (15:12 -0700)]
arm64: dts: rockchip: make rk3399's grf a "simple-mfd"

Per the examples in
Documentation/devicetree/bindings/phy/rockchip-emmc-phy.txt, we need the
grf node to be a simple-mfd in order to properly enumerate child devices
like our eMMC PHY.

Signed-off-by: Brian Norris <briannorris@chromium.org>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
[directly mimic for the pmugrf, which will need the same change later
and there is no need to pollute commit history with another patch]
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
7 years agoarm64: dts: rockchip: assign default rates for core rk3399 clocks
Xing Zheng [Fri, 13 May 2016 20:50:18 +0000 (13:50 -0700)]
arm64: dts: rockchip: assign default rates for core rk3399 clocks

These clocks are all core clocks used by many blocks/peripherals, many
of whose drivers don't set their clock rates at all. Let's assign
reasonable default clock rates for these core clocks, so that these
peripherals get something reasonable by default, and also so that if
child devices want to select a clock rate themselves, their muxes have
some reasonable parent clock rates to branch off of (rather than just
the boot-time defaults).

This helps the eMMC PHY, for one, to get a reasonable ACLK rate.

Signed-off-by: Xing Zheng <zhengxing@rock-chips.com>
Signed-off-by: Brian Norris <briannorris@chromium.org>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
7 years agoarm64: dts: r8a7795: Drop 0x from unit address of gic
Simon Horman [Wed, 25 May 2016 01:11:40 +0000 (10:11 +0900)]
arm64: dts: r8a7795: Drop 0x from unit address of gic

Drop 0x from unit address of gic as this is the desired form for
a unit address.

Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
Acked-by: Geert Uytterhoeven <geert+renesas@glider.be>
7 years agoarm64: dts: salvator-x: Fix W=1 dtc warnings
Geert Uytterhoeven [Fri, 20 May 2016 07:10:14 +0000 (09:10 +0200)]
arm64: dts: salvator-x: Fix W=1 dtc warnings

Warning (unit_address_vs_reg): Node /regulator@1 has a unit name, but no reg property
Warning (unit_address_vs_reg): Node /regulator@2 has a unit name, but no reg property
Warning (unit_address_vs_reg): Node /regulator@3 has a unit name, but no reg property
Warning (unit_address_vs_reg): Node /regulator@4 has a unit name, but no reg property

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
7 years agoarm64: dts: r8a7795: Fix W=1 dtc warnings
Geert Uytterhoeven [Fri, 20 May 2016 07:10:13 +0000 (09:10 +0200)]
arm64: dts: r8a7795: Fix W=1 dtc warnings

Warning (unit_address_vs_reg): Node /cache-controller@0 has a unit name, but no reg property
Warning (unit_address_vs_reg): Node /cache-controller@1 has a unit name, but no reg property
Warning (unit_address_vs_reg): Node /soc/sound@ec500000/rcar_sound,dvc/dvc@0 has a unit name, but no reg property
Warning (unit_address_vs_reg): Node /soc/sound@ec500000/rcar_sound,dvc/dvc@1 has a unit name, but no reg property
Warning (unit_address_vs_reg): Node /soc/sound@ec500000/rcar_sound,src/src@0 has a unit name, but no reg property
Warning (unit_address_vs_reg): Node /soc/sound@ec500000/rcar_sound,src/src@1 has a unit name, but no reg property
Warning (unit_address_vs_reg): Node /soc/sound@ec500000/rcar_sound,src/src@2 has a unit name, but no reg property
Warning (unit_address_vs_reg): Node /soc/sound@ec500000/rcar_sound,src/src@3 has a unit name, but no reg property
Warning (unit_address_vs_reg): Node /soc/sound@ec500000/rcar_sound,src/src@4 has a unit name, but no reg property
Warning (unit_address_vs_reg): Node /soc/sound@ec500000/rcar_sound,src/src@5 has a unit name, but no reg property
Warning (unit_address_vs_reg): Node /soc/sound@ec500000/rcar_sound,src/src@6 has a unit name, but no reg property
Warning (unit_address_vs_reg): Node /soc/sound@ec500000/rcar_sound,src/src@7 has a unit name, but no reg property
Warning (unit_address_vs_reg): Node /soc/sound@ec500000/rcar_sound,src/src@8 has a unit name, but no reg property
Warning (unit_address_vs_reg): Node /soc/sound@ec500000/rcar_sound,src/src@9 has a unit name, but no reg property
Warning (unit_address_vs_reg): Node /soc/sound@ec500000/rcar_sound,ssi/ssi@0 has a unit name, but no reg property
Warning (unit_address_vs_reg): Node /soc/sound@ec500000/rcar_sound,ssi/ssi@1 has a unit name, but no reg property
Warning (unit_address_vs_reg): Node /soc/sound@ec500000/rcar_sound,ssi/ssi@2 has a unit name, but no reg property
Warning (unit_address_vs_reg): Node /soc/sound@ec500000/rcar_sound,ssi/ssi@3 has a unit name, but no reg property
Warning (unit_address_vs_reg): Node /soc/sound@ec500000/rcar_sound,ssi/ssi@4 has a unit name, but no reg property
Warning (unit_address_vs_reg): Node /soc/sound@ec500000/rcar_sound,ssi/ssi@5 has a unit name, but no reg property
Warning (unit_address_vs_reg): Node /soc/sound@ec500000/rcar_sound,ssi/ssi@6 has a unit name, but no reg property
Warning (unit_address_vs_reg): Node /soc/sound@ec500000/rcar_sound,ssi/ssi@7 has a unit name, but no reg property
Warning (unit_address_vs_reg): Node /soc/sound@ec500000/rcar_sound,ssi/ssi@8 has a unit name, but no reg property
Warning (unit_address_vs_reg): Node /soc/sound@ec500000/rcar_sound,ssi/ssi@9 has a unit name, but no reg property

Move the cache-controller nodes under the cpus node, and make their unit
names and reg properties match the MPIDR values.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
7 years agoarm64: dts: r8a7795: Use SYSC "always-on" PM Domain for RWDT node
Geert Uytterhoeven [Fri, 20 May 2016 07:43:02 +0000 (09:43 +0200)]
arm64: dts: r8a7795: Use SYSC "always-on" PM Domain for RWDT node

Hook up the RWDT device node to the SYSC "always-on" PM Domain, for a
more consistent device-power-area description in DT.

Cfr. commit 38dbb45ee4bc ("arm64: dts: r8a7795: Use SYSC "always-on" PM
Domain")

Fixes: f43838a7ae014cba ("arm64: dts: r8a7795: Add RWDT node")
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
7 years agoarm64: dts: salvator-x: Enable watchdog timer
Wolfram Sang [Fri, 1 Apr 2016 11:56:25 +0000 (13:56 +0200)]
arm64: dts: salvator-x: Enable watchdog timer

This patch enables watchdog timer for Salvator-X board.

Signed-off-by: Takeshi Kihara <takeshi.kihara.df@renesas.com>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Acked-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
7 years agoarm64: dts: r8a7795: Add RWDT node
Wolfram Sang [Fri, 1 Apr 2016 11:56:24 +0000 (13:56 +0200)]
arm64: dts: r8a7795: Add RWDT node

This patch adds the RWDT device node for r8a7795.

Signed-off-by: Takeshi Kihara <takeshi.kihara.df@renesas.com>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
7 years agoarm64: dts: r8a7795: enable DMA for I2C
Niklas Söderlund [Tue, 17 May 2016 10:28:01 +0000 (12:28 +0200)]
arm64: dts: r8a7795: enable DMA for I2C

Add DMA properties to the I2C nodes.

Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
7 years agoarm64: dts: r8a7795: Increase the size of GIC-400 mapped registers
Pooya Keshavarzi [Tue, 19 Apr 2016 06:29:55 +0000 (08:29 +0200)]
arm64: dts: r8a7795: Increase the size of GIC-400 mapped registers

There are some requirements about the GIC-400 memory layout and its
mapping if using 64k aligned base addresses like on r8a7795.

See e.g.

http://xenbits.xen.org/gitweb/?p=xen.git;a=commit;h=21550029f709072aacf3b9

Map the whole memory range instead of only 0x2000. This will fix
the issue that some hypervisors, e.g. Xen, fail to handle the
interrupts correctly.

Signed-off-by: Pooya Keshavarzi <Pooya.Keshavarzi@de.bosch.com>
Signed-off-by: Dirk Behme <dirk.behme@de.bosch.com>
Acked-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
7 years agoarm64: dts: salvator-x: SCIF1 supports RTS/CTS hardware flow control
Geert Uytterhoeven [Wed, 4 May 2016 08:57:58 +0000 (10:57 +0200)]
arm64: dts: salvator-x: SCIF1 supports RTS/CTS hardware flow control

On the Salvator-X development board, the RTS and CTS pins of debug
serial-1 port SCIF1 are wired to the CP2102 Serial-USB bridge.  Reflect
this in the DTS by adding the "uart-has-rtscts" property to the scif1
device node.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
7 years agoLinux 4.7-rc1 v4.7-rc1
Linus Torvalds [Sun, 29 May 2016 16:29:24 +0000 (09:29 -0700)]
Linux 4.7-rc1

7 years agohash_string: Fix zero-length case for !DCACHE_WORD_ACCESS
George Spelvin [Sun, 29 May 2016 12:05:56 +0000 (08:05 -0400)]
hash_string: Fix zero-length case for !DCACHE_WORD_ACCESS

The self-test was updated to cover zero-length strings; the function
needs to be updated, too.

Reported-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: George Spelvin <linux@sciencehorizons.net>
Fixes: fcfd2fbf22d2 ("fs/namei.c: Add hashlen_string() function")
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
7 years agoRename other copy of hash_string to hashlen_string
George Spelvin [Sun, 29 May 2016 05:26:41 +0000 (01:26 -0400)]
Rename other copy of hash_string to hashlen_string

The original name was simply hash_string(), but that conflicted with a
function with that name in drivers/base/power/trace.c, and I decided
that calling it "hashlen_" was better anyway.

But you have to do it in two places.

[ This caused build errors for architectures that don't define
  CONFIG_DCACHE_WORD_ACCESS   - Linus ]

Signed-off-by: George Spelvin <linux@sciencehorizons.net>
Reported-by: Guenter Roeck <linux@roeck-us.net>
Fixes: fcfd2fbf22d2 ("fs/namei.c: Add hashlen_string() function")
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
7 years agohpfs: implement the show_options method
Mikulas Patocka [Tue, 24 May 2016 20:49:18 +0000 (22:49 +0200)]
hpfs: implement the show_options method

The HPFS filesystem used generic_show_options to produce string that is
displayed in /proc/mounts.  However, there is a problem that the options
may disappear after remount.  If we mount the filesystem with option1
and then remount it with option2, /proc/mounts should show both option1
and option2, however it only shows option2 because the whole option
string is replaced with replace_mount_options in hpfs_remount_fs.

To fix this bug, implement the hpfs_show_options function that prints
options that are currently selected.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Cc: stable@vger.kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
7 years agoaffs: fix remount failure when there are no options changed
Mikulas Patocka [Tue, 24 May 2016 20:48:33 +0000 (22:48 +0200)]
affs: fix remount failure when there are no options changed

Commit c8f33d0bec99 ("affs: kstrdup() memory handling") checks if the
kstrdup function returns NULL due to out-of-memory condition.

However, if we are remounting a filesystem with no change to
filesystem-specific options, the parameter data is NULL.  In this case,
kstrdup returns NULL (because it was passed NULL parameter), although no
out of memory condition exists.  The mount syscall then fails with
ENOMEM.

This patch fixes the bug.  We fail with ENOMEM only if data is non-NULL.

The patch also changes the call to replace_mount_options - if we didn't
pass any filesystem-specific options, we don't call
replace_mount_options (thus we don't erase existing reported options).

Fixes: c8f33d0bec99 ("affs: kstrdup() memory handling")
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Cc: stable@vger.kernel.org # v4.1+
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
7 years agohpfs: fix remount failure when there are no options changed
Mikulas Patocka [Tue, 24 May 2016 20:47:00 +0000 (22:47 +0200)]
hpfs: fix remount failure when there are no options changed

Commit ce657611baf9 ("hpfs: kstrdup() out of memory handling") checks if
the kstrdup function returns NULL due to out-of-memory condition.

However, if we are remounting a filesystem with no change to
filesystem-specific options, the parameter data is NULL.  In this case,
kstrdup returns NULL (because it was passed NULL parameter), although no
out of memory condition exists.  The mount syscall then fails with
ENOMEM.

This patch fixes the bug.  We fail with ENOMEM only if data is non-NULL.

The patch also changes the call to replace_mount_options - if we didn't
pass any filesystem-specific options, we don't call
replace_mount_options (thus we don't erase existing reported options).

Fixes: ce657611baf9 ("hpfs: kstrdup() out of memory handling")
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Cc: stable@vger.kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
7 years agoMerge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus
Linus Torvalds [Sat, 28 May 2016 23:41:39 +0000 (16:41 -0700)]
Merge branch 'upstream' of git://git.linux-mips.org/ralf/upstream-linus

Pull more MIPS updates from Ralf Baechle:
 "This is the secondnd batch of MIPS patches for 4.7. Summary:

  CPS:
   - Copy EVA configuration when starting secondary VPs.

  EIC:
   - Clear Status IPL.

  Lasat:
   - Fix a few off by one bugs.

  lib:
   - Mark intrinsics notrace.  Not only are the intrinsics
     uninteresting, it would cause infinite recursion.

  MAINTAINERS:
   - Add file patterns for MIPS BRCM device tree bindings.
   - Add file patterns for mips device tree bindings.

  MT7628:
   - Fix MT7628 pinmux typos.
   - wled_an pinmux gpio.
   - EPHY LEDs pinmux support.

  Pistachio:
   - Enable KASLR

  VDSO:
   - Build microMIPS VDSO for microMIPS kernels.
   - Fix aliasing warning by building with `-fno-strict-aliasing' for
     debugging but also tracing them might result in recursion.

  Misc:
   - Add missing FROZEN hotplug notifier transitions.
   - Fix clk binding example for varioius PIC32 devices.
   - Fix cpu interrupt controller node-names in the DT files.
   - Fix XPA CPU feature separation.
   - Fix write_gc0_* macros when writing zero.
   - Add inline asm encoding helpers.
   - Add missing VZ accessor microMIPS encodings.
   - Fix little endian microMIPS MSA encodings.
   - Add 64-bit HTW fields and fix its configuration.
   - Fix sigreturn via VDSO on microMIPS kernel.
   - Lots of typo fixes.
   - Add definitions of SegCtl registers and use them"

* 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus: (49 commits)
  MIPS: Add missing FROZEN hotplug notifier transitions
  MIPS: Build microMIPS VDSO for microMIPS kernels
  MIPS: Fix sigreturn via VDSO on microMIPS kernel
  MIPS: devicetree: fix cpu interrupt controller node-names
  MIPS: VDSO: Build with `-fno-strict-aliasing'
  MIPS: Pistachio: Enable KASLR
  MIPS: lib: Mark intrinsics notrace
  MIPS: Fix 64-bit HTW configuration
  MIPS: Add 64-bit HTW fields
  MAINTAINERS: Add file patterns for mips device tree bindings
  MAINTAINERS: Add file patterns for mips brcm device tree bindings
  MIPS: Simplify DSP instruction encoding macros
  MIPS: Add missing tlbinvf/XPA microMIPS encodings
  MIPS: Fix little endian microMIPS MSA encodings
  MIPS: Add missing VZ accessor microMIPS encodings
  MIPS: Add inline asm encoding helpers
  MIPS: Spelling fix lets -> let's
  MIPS: VR41xx: Fix typo
  MIPS: oprofile: Fix typo
  MIPS: math-emu: Fix typo
  ...

7 years agofs: fix binfmt_aout.c build error
Guenter Roeck [Sat, 28 May 2016 22:26:02 +0000 (15:26 -0700)]
fs: fix binfmt_aout.c build error

Various builds (such as i386:allmodconfig) fail with

  fs/binfmt_aout.c:133:2: error: expected identifier or '(' before 'return'
  fs/binfmt_aout.c:134:1: error: expected identifier or '(' before '}' token

[ Oops. My bad, I had stupidly thought that "allmodconfig" covered this
  on x86-64 too, but it obviously doesn't.  Egg on my face.  - Linus ]

Fixes: 5d22fc25d4fc ("mm: remove more IS_ERR_VALUE abuses")
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
7 years agoMerge branch 'hash' of git://ftp.sciencehorizons.net/linux
Linus Torvalds [Sat, 28 May 2016 23:15:25 +0000 (16:15 -0700)]
Merge branch 'hash' of git://ftp.sciencehorizons.net/linux

Pull string hash improvements from George Spelvin:
 "This series does several related things:

   - Makes the dcache hash (fs/namei.c) useful for general kernel use.

     (Thanks to Bruce for noticing the zero-length corner case)

   - Converts the string hashes in <linux/sunrpc/svcauth.h> to use the
     above.

   - Avoids 64-bit multiplies in hash_64() on 32-bit platforms.  Two
     32-bit multiplies will do well enough.

   - Rids the world of the bad hash multipliers in hash_32.

     This finishes the job started in commit 689de1d6ca95 ("Minimal
     fix-up of bad hashing behavior of hash_64()")

     The vast majority of Linux architectures have hardware support for
     32x32-bit multiply and so derive no benefit from "simplified"
     multipliers.

     The few processors that do not (68000, h8/300 and some models of
     Microblaze) have arch-specific implementations added.  Those
     patches are last in the series.

   - Overhauls the dcache hash mixing.

     The patch in commit 0fed3ac866ea ("namei: Improve hash mixing if
     CONFIG_DCACHE_WORD_ACCESS") was an off-the-cuff suggestion.
     Replaced with a much more careful design that's simultaneously
     faster and better.  (My own invention, as there was noting suitable
     in the literature I could find.  Comments welcome!)

   - Modify the hash_name() loop to skip the initial HASH_MIX().  This
     would let us salt the hash if we ever wanted to.

   - Sort out partial_name_hash().

     The hash function is declared as using a long state, even though
     it's truncated to 32 bits at the end and the extra internal state
     contributes nothing to the result.  And some callers do odd things:

      - fs/hfs/string.c only allocates 32 bits of state
      - fs/hfsplus/unicode.c uses it to hash 16-bit unicode symbols not bytes

   - Modify bytemask_from_count to handle inputs of 1..sizeof(long)
     rather than 0..sizeof(long)-1.  This would simplify users other
     than full_name_hash"

  Special thanks to Bruce Fields for testing and finding bugs in v1.  (I
  learned some humbling lessons about "obviously correct" code.)

  On the arch-specific front, the m68k assembly has been tested in a
  standalone test harness, I've been in contact with the Microblaze
  maintainers who mostly don't care, as the hardware multiplier is never
  omitted in real-world applications, and I haven't heard anything from
  the H8/300 world"

* 'hash' of git://ftp.sciencehorizons.net/linux:
  h8300: Add <asm/hash.h>
  microblaze: Add <asm/hash.h>
  m68k: Add <asm/hash.h>
  <linux/hash.h>: Add support for architecture-specific functions
  fs/namei.c: Improve dcache hash function
  Eliminate bad hash multipliers from hash_32() and  hash_64()
  Change hash_64() return value to 32 bits
  <linux/sunrpc/svcauth.h>: Define hash_str() in terms of hashlen_string()
  fs/namei.c: Add hashlen_string() function
  Pull out string hash to <linux/stringhash.h>

7 years agoh8300: Add <asm/hash.h>
George Spelvin [Wed, 25 May 2016 18:19:49 +0000 (14:19 -0400)]
h8300: Add <asm/hash.h>

This will improve the performance of hash_32() and hash_64(), but due
to complete lack of multi-bit shift instructions on H8, performance will
still be bad in surrounding code.

Designing H8-specific hash algorithms to work around that is a separate
project.  (But if the maintainers would like to get in touch...)

Signed-off-by: George Spelvin <linux@sciencehorizons.net>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Cc: uclinux-h8-devel@lists.sourceforge.jp
7 years agomicroblaze: Add <asm/hash.h>
George Spelvin [Wed, 25 May 2016 15:06:09 +0000 (11:06 -0400)]
microblaze: Add <asm/hash.h>

Microblaze is an FPGA soft core that can be configured various ways.

If it is configured without a multiplier, the standard __hash_32()
will require a call to __mulsi3, which is a slow software loop.

Instead, use a shift-and-add sequence for the constant multiply.
GCC knows how to do this, but it's not as clever as some.

Signed-off-by: George Spelvin <linux@sciencehorizons.net>
Cc: Alistair Francis <alistair.francis@xilinx.com>
Cc: Michal Simek <michal.simek@xilinx.com>
7 years agom68k: Add <asm/hash.h>
George Spelvin [Thu, 26 May 2016 15:36:19 +0000 (11:36 -0400)]
m68k: Add <asm/hash.h>

This provides a multiply by constant GOLDEN_RATIO_32 = 0x61C88647
for the original mc68000, which lacks a 32x32-bit multiply instruction.

Yes, the amount of optimization effort put in is excessive. :-)

Shift-add chain found by Yevgen Voronenko's Hcub algorithm at
http://spiral.ece.cmu.edu/mcm/gen.html

Signed-off-by: George Spelvin <linux@sciencehorizons.net>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Greg Ungerer <gerg@linux-m68k.org>
Cc: Andreas Schwab <schwab@linux-m68k.org>
Cc: Philippe De Muyter <phdm@macq.eu>
Cc: linux-m68k@lists.linux-m68k.org
7 years ago<linux/hash.h>: Add support for architecture-specific functions
George Spelvin [Fri, 27 May 2016 02:11:51 +0000 (22:11 -0400)]
<linux/hash.h>: Add support for architecture-specific functions

This is just the infrastructure; there are no users yet.

This is modelled on CONFIG_ARCH_RANDOM; a CONFIG_ symbol declares
the existence of <asm/hash.h>.

That file may define its own versions of various functions, and define
HAVE_* symbols (no CONFIG_ prefix!) to suppress the generic ones.

Included is a self-test (in lib/test_hash.c) that verifies the basics.
It is NOT in general required that the arch-specific functions compute
the same thing as the generic, but if a HAVE_* symbol is defined with
the value 1, then equality is tested.

Signed-off-by: George Spelvin <linux@sciencehorizons.net>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Greg Ungerer <gerg@linux-m68k.org>
Cc: Andreas Schwab <schwab@linux-m68k.org>
Cc: Philippe De Muyter <phdm@macq.eu>
Cc: linux-m68k@lists.linux-m68k.org
Cc: Alistair Francis <alistai@xilinx.com>
Cc: Michal Simek <michal.simek@xilinx.com>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Cc: uclinux-h8-devel@lists.sourceforge.jp
7 years agofs/namei.c: Improve dcache hash function
George Spelvin [Mon, 23 May 2016 11:43:58 +0000 (07:43 -0400)]
fs/namei.c: Improve dcache hash function

Patch 0fed3ac866 improved the hash mixing, but the function is slower
than necessary; there's a 7-instruction dependency chain (10 on x86)
each loop iteration.

Word-at-a-time access is a very tight loop (which is good, because
link_path_walk() is one of the hottest code paths in the entire kernel),
and the hash mixing function must not have a longer latency to avoid
slowing it down.

There do not appear to be any published fast hash functions that:
1) Operate on the input a word at a time, and
2) Don't need to know the length of the input beforehand, and
3) Have a single iterated mixing function, not needing conditional
   branches or unrolling to distinguish different loop iterations.

One of the algorithms which comes closest is Yann Collet's xxHash, but
that's two dependent multiplies per word, which is too much.

The key insights in this design are:

1) Barring expensive ops like multiplies, to diffuse one input bit
   across 64 bits of hash state takes at least log2(64) = 6 sequentially
   dependent instructions.  That is more cycles than we'd like.
2) An operation like "hash ^= hash << 13" requires a second temporary
   register anyway, and on a 2-operand machine like x86, it's three
   instructions.
3) A better use of a second register is to hold a two-word hash state.
   With careful design, no temporaries are needed at all, so it doesn't
   increase register pressure.  And this gets rid of register copying
   on 2-operand machines, so the code is smaller and faster.
4) Using two words of state weakens the requirement for one-round mixing;
   we now have two rounds of mixing before cancellation is possible.
5) A two-word hash state also allows operations on both halves to be
   done in parallel, so on a superscalar processor we get more mixing
   in fewer cycles.

I ended up using a mixing function inspired by the ChaCha and Speck
round functions.  It is 6 simple instructions and 3 cycles per iteration
(assuming multiply by 9 can be done by an "lea" instruction):

x ^= *input++;
y ^= x; x = ROL(x, K1);
x += y; y = ROL(y, K2);
y *= 9;

Not only is this reversible, two consecutive rounds are reversible:
if you are given the initial and final states, but not the intermediate
state, it is possible to compute both input words.  This means that at
least 3 words of input are required to create a collision.

(It also has the property, used by hash_name() to avoid a branch, that
it hashes all-zero to all-zero.)

The rotate constants K1 and K2 were found by experiment.  The search took
a sample of random initial states (I used 1023) and considered the effect
of flipping each of the 64 input bits on each of the 128 output bits two
rounds later.  Each of the 8192 pairs can be considered a biased coin, and
adding up the Shannon entropy of all of them produces a score.

The best-scoring shifts also did well in other tests (flipping bits in y,
trying 3 or 4 rounds of mixing, flipping all 64*63/2 pairs of input bits),
so the choice was made with the additional constraint that the sum of the
shifts is odd and not too close to the word size.

The final state is then folded into a 32-bit hash value by a less carefully
optimized multiply-based scheme.  This also has to be fast, as pathname
components tend to be short (the most common case is one iteration!), but
there's some room for latency, as there is a fair bit of intervening logic
before the hash value is used for anything.

(Performance verified with "bonnie++ -s 0 -n 1536:-2" on tmpfs.  I need
a better benchmark; the numbers seem to show a slight dip in performance
between 4.6.0 and this patch, but they're too noisy to quote.)

Special thanks to Bruce fields for diligent testing which uncovered a
nasty fencepost error in an earlier version of this patch.

[checkpatch.pl formatting complaints noted and respectfully disagreed with.]

Signed-off-by: George Spelvin <linux@sciencehorizons.net>
Tested-by: J. Bruce Fields <bfields@redhat.com>
7 years agoEliminate bad hash multipliers from hash_32() and hash_64()
George Spelvin [Fri, 27 May 2016 03:00:23 +0000 (23:00 -0400)]
Eliminate bad hash multipliers from hash_32() and  hash_64()

The "simplified" prime multipliers made very bad hash functions, so get rid
of them.  This completes the work of 689de1d6ca.

To avoid the inefficiency which was the motivation for the "simplified"
multipliers, hash_64() on 32-bit systems is changed to use a different
algorithm.  It makes two calls to hash_32() instead.

drivers/media/usb/dvb-usb-v2/af9015.c uses the old GOLDEN_RATIO_PRIME_32
for some horrible reason, so it inherits a copy of the old definition.

Signed-off-by: George Spelvin <linux@sciencehorizons.net>
Cc: Antti Palosaari <crope@iki.fi>
Cc: Mauro Carvalho Chehab <m.chehab@samsung.com>
7 years agoChange hash_64() return value to 32 bits
George Spelvin [Fri, 27 May 2016 02:22:01 +0000 (22:22 -0400)]
Change hash_64() return value to 32 bits

That's all that's ever asked for, and it makes the return
type of hash_long() consistent.

It also allows (upcoming patch) an optimized implementation
of hash_64 on 32-bit machines.

I tried adding a BUILD_BUG_ON to ensure the number of bits requested
was never more than 32 (most callers use a compile-time constant), but
adding <linux/bug.h> to <linux/hash.h> breaks the tools/perf compiler
unless tools/perf/MANIFEST is updated, and understanding that code base
well enough to update it is too much trouble.  I did the rest of an
allyesconfig build with such a check, and nothing tripped.

Signed-off-by: George Spelvin <linux@sciencehorizons.net>
7 years ago<linux/sunrpc/svcauth.h>: Define hash_str() in terms of hashlen_string()
George Spelvin [Fri, 20 May 2016 17:31:33 +0000 (13:31 -0400)]
<linux/sunrpc/svcauth.h>: Define hash_str() in terms of hashlen_string()

Finally, the first use of previous two patches: eliminate the
separate ad-hoc string hash functions in the sunrpc code.

Now hash_str() is a wrapper around hash_string(), and hash_mem() is
likewise a wrapper around full_name_hash().

Note that sunrpc code *does* call hash_mem() with a zero length, which
is why the previous patch needed to handle that in full_name_hash().
(Thanks, Bruce, for finding that!)

This also eliminates the only caller of hash_long which asks for
more than 32 bits of output.

The comment about the quality of hashlen_string() and full_name_hash()
is jumping the gun by a few patches; they aren't very impressive now,
but will be improved greatly later in the series.

Signed-off-by: George Spelvin <linux@sciencehorizons.net>
Tested-by: J. Bruce Fields <bfields@redhat.com>
Acked-by: J. Bruce Fields <bfields@redhat.com>
Cc: Jeff Layton <jlayton@poochiereds.net>
Cc: linux-nfs@vger.kernel.org
7 years agofs/namei.c: Add hashlen_string() function
George Spelvin [Fri, 20 May 2016 12:41:37 +0000 (08:41 -0400)]
fs/namei.c: Add hashlen_string() function

We'd like to make more use of the highly-optimized dcache hash functions
throughout the kernel, rather than have every subsystem create its own,
and a function that hashes basic null-terminated strings is required
for that.

(The name is to emphasize that it returns both hash and length.)

It's actually useful in the dcache itself, specifically d_alloc_name().
Other uses in the next patch.

full_name_hash() is also tweaked to make it more generally useful:
1) Take a "char *" rather than "unsigned char *" argument, to
   be consistent with hash_name().
2) Handle zero-length inputs.  If we want more callers, we don't want
   to make them worry about corner cases.

Signed-off-by: George Spelvin <linux@sciencehorizons.net>