ARM: dts: dra7x-evm: Prevent glitch on DCAN1 pinmux

Driver core sets "default" pinmux on on probe and CAN driver
sets "sleep" pinmux during register. This causes a small window
where the CAN pins are in "default" state with the DCAN module
being disabled.

Change the "default" state to be like sleep so this glitch is
avoided. Add a new "active" state that is used by the driver
when CAN is actually active.

Signed-off-by: Roger Quadros <rogerq@ti.com>
Cc: linux-stable <stable@vger.kernel.org>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

diff --git a/arch/arm/boot/dts/dra7-evm.dts b/arch/arm/boot/dts/dra7-evm.dts
index aa46590..096f68b 100644 (file)
--- a/arch/arm/boot/dts/dra7-evm.dts
+++ b/arch/arm/boot/dts/dra7-evm.dts
@@ -686,7 +686,8 @@
 
 &dcan1 {
        status = "ok";
-       pinctrl-names = "default", "sleep";
-       pinctrl-0 = <&dcan1_pins_default>;
+       pinctrl-names = "default", "sleep", "active";
+       pinctrl-0 = <&dcan1_pins_sleep>;
        pinctrl-1 = <&dcan1_pins_sleep>;
+       pinctrl-2 = <&dcan1_pins_default>;
 };

diff --git a/arch/arm/boot/dts/dra72-evm.dts b/arch/arm/boot/dts/dra72-evm.dts
index 4e1b605..8037384 100644 (file)
--- a/arch/arm/boot/dts/dra72-evm.dts
+++ b/arch/arm/boot/dts/dra72-evm.dts
@@ -587,9 +587,10 @@
 
 &dcan1 {
        status = "ok";
-       pinctrl-names = "default", "sleep";
-       pinctrl-0 = <&dcan1_pins_default>;
+       pinctrl-names = "default", "sleep", "active";
+       pinctrl-0 = <&dcan1_pins_sleep>;
        pinctrl-1 = <&dcan1_pins_sleep>;
+       pinctrl-2 = <&dcan1_pins_default>;
 };
 
 &qspi {