Move the ps8622 bridge driver into drm/bridge.
BUG=chrome-os-partner:17557
TEST=Builds
Change-Id: I153539311c5a31aafab9deff1f74384a70bc48c4
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/43939
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Commit-Queue: Vincent Palatin <vpalatin@chromium.org>
Tested-by: Vincent Palatin <vpalatin@chromium.org>
If you compile this as a module, you can still override this
value using the module parameters.
-config PS8622
- tristate "Parade eDP/LVDS bridge"
- ---help---
- Adds the driver for the Parade PS8622 eDP/LVDS bridge chip.
-
endif # AUXDISPLAY
obj-$(CONFIG_KS0108) += ks0108.o
obj-$(CONFIG_CFAG12864B) += cfag12864b.o cfag12864bfb.o
-obj-$(CONFIG_PS8622) += ps8622.o
+++ /dev/null
-/*
- * Parade PS8622 eDP/LVDS bridge driver
- *
- * Copyright (C) 2012 Google, Inc.
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- */
-
-#include <linux/module.h>
-#include <linux/backlight.h>
-#include <linux/delay.h>
-#include <linux/err.h>
-#include <linux/fb.h>
-#include <linux/gpio.h>
-#include <linux/i2c.h>
-#include <linux/of.h>
-#include <linux/of_gpio.h>
-#include <linux/pm.h>
-#include <linux/regulator/consumer.h>
-
-struct ps8622_platform_data {
- int gpio_slp_n;
- int gpio_rst_n;
-};
-
-struct ps8622_dev {
- struct device *dev;
- struct backlight_device *bl;
- struct ps8622_platform_data *pdata;
- struct i2c_client *client;
- struct regulator *v12;
-};
-
-/* Brightness scale on the Parade chip */
-#define PS8622_MAX_BRIGHTNESS 0xff
-
-static struct ps8622_platform_data *ps8622_parse_dt_pdata(struct device *dev)
-{
- struct ps8622_platform_data *pd;
-
- pd = devm_kzalloc(dev, sizeof(struct ps8622_platform_data), GFP_KERNEL);
- if (!pd) {
- dev_err(dev, "Can't allocate platform data\n");
- return ERR_PTR(-ENOMEM);
- }
-
- /* Fill platform data with device tree data */
- pd->gpio_slp_n = of_get_named_gpio(dev->of_node, "sleep-gpio", 0);
- pd->gpio_rst_n = of_get_named_gpio(dev->of_node, "reset-gpio", 0);
-
- return pd;
-
-}
-
-static int ps8622_set(struct i2c_client *client, u8 page, u8 reg, u8 val)
-{
- int ret;
- struct i2c_adapter *adap = client->adapter;
- struct i2c_msg msg;
- u8 data[] = {reg, val};
-
- msg.addr = client->addr + page;
- msg.flags = 0;
- msg.len = sizeof(data);
- msg.buf = data;
-
- ret = i2c_transfer(adap, &msg, 1);
- if (ret != 1)
- pr_warn("PS8622 I2C write (0x%02x,0x%02x,0x%02x) failed: %d\n",
- client->addr + page, reg, val, ret);
- return !(ret == 1);
-}
-
-static int ps8622_send_config(struct ps8622_dev *ps8622)
-{
- struct i2c_client *cl = ps8622->client;
- int err = 0;
-
- /* wait 20ms after power ON */
- usleep_range(20000, 30000);
-
- err |= ps8622_set(cl, 0x02, 0xa1, 0x01); /* HPD low */
- /* SW setting */
- err |= ps8622_set(cl, 0x04, 0x14, 0x01); /* [1:0] SW output 1.2V voltage
- * is lower to 96% */
- /* RCO SS setting */
- err |= ps8622_set(cl, 0x04, 0xe3, 0x20); /* [5:4] = b01 0.5%, b10 1%,
- * b11 1.5% */
- err |= ps8622_set(cl, 0x04, 0xe2, 0x80); /* [7] RCO SS enable */
- /* RPHY Setting */
- err |= ps8622_set(cl, 0x04, 0x8a, 0x0c); /* [3:2] CDR tune wait cycle
- * before measure for fine tune
- * b00: 1us b01: 0.5us b10:2us
- * b11: 4us */
- err |= ps8622_set(cl, 0x04, 0x89, 0x08); /* [3] RFD always on */
- err |= ps8622_set(cl, 0x04, 0x71, 0x2d); /* CTN lock in/out:
- * 20000ppm/80000ppm.
- * Lock out 2 times. */
- /* 2.7G CDR settings */
- err |= ps8622_set(cl, 0x04, 0x7d, 0x07); /* NOF=40LSB for HBR CDR
- * setting */
- err |= ps8622_set(cl, 0x04, 0x7b, 0x00); /* [1:0] Fmin=+4bands */
- err |= ps8622_set(cl, 0x04, 0x7a, 0xfd); /* [7:5] DCO_FTRNG=+-40% */
- /* 1.62G CDR settings */
- err |= ps8622_set(cl, 0x04, 0xc0, 0x12); /* [5:2]NOF=64LSB [1:0]DCO
- * scale is 2/5 */
- err |= ps8622_set(cl, 0x04, 0xc1, 0x92); /* Gitune=-37% */
- err |= ps8622_set(cl, 0x04, 0xc2, 0x1c); /* Fbstep=100% */
- err |= ps8622_set(cl, 0x04, 0x32, 0x80); /* [7] LOS signal disable */
- /* RPIO Setting */
- err |= ps8622_set(cl, 0x04, 0x00, 0xb0); /* [7:4] LVDS driver bias
- * current : 75% (250mV swing)
- * */
- err |= ps8622_set(cl, 0x04, 0x15, 0x40); /* [7:6] Right-bar GPIO output
- * strength is 8mA */
- /* EQ Training State Machine Setting */
- err |= ps8622_set(cl, 0x04, 0x54, 0x10); /* RCO calibration start */
- /* Logic, needs more than 10 I2C command */
- err |= ps8622_set(cl, 0x01, 0x02, 0x81); /* [4:0] MAX_LANE_COUNT set to
- * one lane */
- err |= ps8622_set(cl, 0x01, 0x21, 0x81); /* [4:0] LANE_COUNT_SET set to
- * one lane (in case no-link
- * traing conflict) */
- err |= ps8622_set(cl, 0x00, 0x52, 0x20);
- err |= ps8622_set(cl, 0x00, 0xf1, 0x03); /* HPD CP toggle enable */
- err |= ps8622_set(cl, 0x00, 0x62, 0x41);
- err |= ps8622_set(cl, 0x00, 0xf6, 0x01); /* Counter number, add 1ms
- * counter delay */
- err |= ps8622_set(cl, 0x00, 0x77, 0x06); /* [6]PWM function control by
- * DPCD0040f[7], default is PWM
- * block always works. */
- err |= ps8622_set(cl, 0x00, 0x4c, 0x04); /* 04h Adjust VTotal tolerance
- * to fix the 30Hz no display
- * issue */
- err |= ps8622_set(cl, 0x01, 0xc0, 0x00); /* DPCD00400='h00, Parade OUI =
- * 'h001cf8 */
- err |= ps8622_set(cl, 0x01, 0xc1, 0x1c); /* DPCD00401='h1c */
- err |= ps8622_set(cl, 0x01, 0xc2, 0xf8); /* DPCD00402='hf8 */
- err |= ps8622_set(cl, 0x01, 0xc3, 0x44); /* DPCD403~408 = ASCII code
- * D2SLV5='h4432534c5635 */
- err |= ps8622_set(cl, 0x01, 0xc4, 0x32); /* DPCD404 */
- err |= ps8622_set(cl, 0x01, 0xc5, 0x53); /* DPCD405 */
- err |= ps8622_set(cl, 0x01, 0xc6, 0x4c); /* DPCD406 */
- err |= ps8622_set(cl, 0x01, 0xc7, 0x56); /* DPCD407 */
- err |= ps8622_set(cl, 0x01, 0xc8, 0x35); /* DPCD408 */
- err |= ps8622_set(cl, 0x01, 0xca, 0x01); /* DPCD40A, Initial Code major
- * revision '01' */
- err |= ps8622_set(cl, 0x01, 0xcb, 0x05); /* DPCD40B, Initial Code minor
- * revision '05' */
- err |= ps8622_set(cl, 0x01, 0xa5, 0xa0); /* DPCD720, internal PWM */
- err |= ps8622_set(cl, 0x01, 0xa7, ps8622->bl->props.brightness);
- /* FFh for 100% brightness,
- * 0h for 0% brightness */
- err |= ps8622_set(cl, 0x01, 0xcc, 0x13); /* Set LVDS output as 6bit-VESA
- * mapping, single LVDS channel
- * */
- err |= ps8622_set(cl, 0x02, 0xb1, 0x20); /* Enable SSC set by register
- * */
- err |= ps8622_set(cl, 0x04, 0x10, 0x16); /* Set SSC enabled and +/-1%
- * central spreading */
- /* Logic end */
- err |= ps8622_set(cl, 0x04, 0x59, 0x60); /* MPU Clock source: LC => RCO
- * */
- err |= ps8622_set(cl, 0x04, 0x54, 0x14); /* LC -> RCO */
- err |= ps8622_set(cl, 0x02, 0xa1, 0x91); /* HPD high */
-
- return err ? -EIO : 0;
-}
-
-static int ps8622_power_up(struct ps8622_dev *ps8622)
-{
- struct ps8622_platform_data *pd = ps8622->pdata;
-
- if (ps8622->v12)
- regulator_enable(ps8622->v12);
-
- if (pd->gpio_slp_n > 0)
- gpio_set_value(pd->gpio_slp_n, 1);
-
- if (pd->gpio_rst_n > 0) {
- gpio_set_value(pd->gpio_rst_n, 0);
- udelay(10);
- gpio_set_value(pd->gpio_rst_n, 1);
- }
-
- return ps8622_send_config(ps8622);
-}
-
-static int ps8622_power_down(struct ps8622_dev *ps8622)
-{
- struct ps8622_platform_data *pd = ps8622->pdata;
-
- if (pd->gpio_rst_n > 0)
- gpio_set_value(pd->gpio_rst_n, 1);
-
- if (pd->gpio_slp_n > 0)
- gpio_set_value(pd->gpio_slp_n, 0);
-
- if (ps8622->v12)
- regulator_disable(ps8622->v12);
-
- return 0;
-}
-
-int ps8622_suspend(struct device *dev)
-{
- struct i2c_client *client = container_of(dev, struct i2c_client, dev);
- struct ps8622_dev *ps8622 = i2c_get_clientdata(client);
-
- return ps8622_power_down(ps8622);
-}
-
-int ps8622_resume(struct device *dev)
-{
- struct i2c_client *client = container_of(dev, struct i2c_client, dev);
- struct ps8622_dev *ps8622 = i2c_get_clientdata(client);
-
- return ps8622_power_up(ps8622);
-}
-
-static int ps8622_backlight_update(struct backlight_device *bl)
-{
- struct ps8622_dev *ps8622 = dev_get_drvdata(&bl->dev);
- int brightness = bl->props.brightness;
-
- if (bl->props.power != FB_BLANK_UNBLANK ||
- bl->props.state & (BL_CORE_SUSPENDED | BL_CORE_FBBLANK))
- brightness = 0;
-
- return ps8622_set(ps8622->client, 0x01, 0xa7, brightness);
-}
-
-static int ps8622_backlight_get(struct backlight_device *bl)
-{
- return bl->props.brightness;
-}
-
-static const struct backlight_ops ps8622_backlight_ops = {
- .update_status = ps8622_backlight_update,
- .get_brightness = ps8622_backlight_get,
-};
-
-int ps8622_probe(struct i2c_client *client, const struct i2c_device_id *device)
-{
- struct device *dev = &client->dev;
- struct ps8622_platform_data *pd = dev->platform_data;
- struct ps8622_dev *ps8622;
- int ret;
-
- ps8622 = devm_kzalloc(dev, sizeof(struct ps8622_dev), GFP_KERNEL);
- if (!ps8622) {
- dev_err(dev, "could not allocate memory\n");
- return -ENOMEM;
- }
- ps8622->dev = dev;
- ps8622->client = client;
- i2c_set_clientdata(client, ps8622);
-
- if (dev->of_node) {
- pd = ps8622_parse_dt_pdata(dev);
- if (IS_ERR(pd)) {
- ret = PTR_ERR(pd);
- goto err;
- }
- }
- if (!pd) {
- ret = -ENODEV;
- dev_warn(dev, "No platform data found\n");
- goto err;
- }
- ps8622->pdata = pd;
-
- ps8622->v12 = regulator_get(dev, "vdd_bridge");
- if (IS_ERR(ps8622->v12)) {
- dev_warn(dev, "no 1.2v regulator found for PS8622\n");
- ps8622->v12 = NULL;
- }
-
- if (pd->gpio_slp_n > 0) {
- ret = gpio_request_one(pd->gpio_slp_n, GPIOF_OUT_INIT_HIGH,
- "PS8622_SLP_N");
- if (ret)
- goto err;
- }
- if (pd->gpio_rst_n > 0) {
- /*
- * Request the reset pin low to avoid the bridge being
- * initialized prematurely
- */
- ret = gpio_request_one(pd->gpio_rst_n, GPIOF_OUT_INIT_LOW,
- "PS8622_RST_N");
- if (ret)
- goto err;
- }
-
- /* create a backlight interface for the bridge */
- ps8622->bl = backlight_device_register("ps8622-backlight", dev, ps8622,
- &ps8622_backlight_ops, NULL);
- if (IS_ERR(ps8622->bl)) {
- dev_err(dev, "failed to register backlight\n");
- ret = PTR_ERR(ps8622->bl);
- ps8622->bl = NULL;
- goto err;
- }
- ps8622->bl->props.max_brightness = PS8622_MAX_BRIGHTNESS;
- ps8622->bl->props.brightness = PS8622_MAX_BRIGHTNESS;
-
- ret = ps8622_power_up(ps8622);
- if (ret)
- goto err;
-
- return 0;
-
-err:
- if (ps8622->bl)
- backlight_device_unregister(ps8622->bl);
- if (ps8622->v12)
- regulator_put(ps8622->v12);
- dev_err(dev, "device probe failed : %d\n", ret);
- return ret;
-}
-
-int ps8622_remove(struct i2c_client *client)
-{
- struct ps8622_dev *ps8622 = i2c_get_clientdata(client);
-
- if (ps8622->bl)
- backlight_device_unregister(ps8622->bl);
- if (ps8622->v12)
- regulator_put(ps8622->v12);
- return 0;
-}
-
-static const struct i2c_device_id ps8622_ids[] = {
- { "ps8622", 0 },
- {},
-};
-MODULE_DEVICE_TABLE(i2c, ps8622_ids);
-
-static SIMPLE_DEV_PM_OPS(ps8622_pm_ops, ps8622_suspend, ps8622_resume);
-
-static struct i2c_driver ps8622_driver = {
- .id_table = ps8622_ids,
- .probe = ps8622_probe,
- .remove = ps8622_remove,
- .driver = {
- .name = "ps8622",
- .owner = THIS_MODULE,
- .pm = &ps8622_pm_ops,
- },
-};
-module_i2c_driver(ps8622_driver);
depends on DRM && I2C
---help---
Adds the driver for the NXP PTN3460 DP/LVDS bridge chip.
+
+config DRM_PS8622
+ tristate "Parade eDP/LVDS bridge"
+ ---help---
+ Adds the driver for the Parade PS8622 eDP/LVDS bridge chip.
ccflags-y := -Iinclude/drm
obj-$(CONFIG_DRM_PTN3460) += ptn3460.o
+obj-$(CONFIG_DRM_PS8622) += ps8622.o
--- /dev/null
+/*
+ * Parade PS8622 eDP/LVDS bridge driver
+ *
+ * Copyright (C) 2012 Google, Inc.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/module.h>
+#include <linux/backlight.h>
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/fb.h>
+#include <linux/gpio.h>
+#include <linux/i2c.h>
+#include <linux/of.h>
+#include <linux/of_gpio.h>
+#include <linux/pm.h>
+#include <linux/regulator/consumer.h>
+
+struct ps8622_platform_data {
+ int gpio_slp_n;
+ int gpio_rst_n;
+};
+
+struct ps8622_dev {
+ struct device *dev;
+ struct backlight_device *bl;
+ struct ps8622_platform_data *pdata;
+ struct i2c_client *client;
+ struct regulator *v12;
+};
+
+/* Brightness scale on the Parade chip */
+#define PS8622_MAX_BRIGHTNESS 0xff
+
+static struct ps8622_platform_data *ps8622_parse_dt_pdata(struct device *dev)
+{
+ struct ps8622_platform_data *pd;
+
+ pd = devm_kzalloc(dev, sizeof(struct ps8622_platform_data), GFP_KERNEL);
+ if (!pd) {
+ dev_err(dev, "Can't allocate platform data\n");
+ return ERR_PTR(-ENOMEM);
+ }
+
+ /* Fill platform data with device tree data */
+ pd->gpio_slp_n = of_get_named_gpio(dev->of_node, "sleep-gpio", 0);
+ pd->gpio_rst_n = of_get_named_gpio(dev->of_node, "reset-gpio", 0);
+
+ return pd;
+
+}
+
+static int ps8622_set(struct i2c_client *client, u8 page, u8 reg, u8 val)
+{
+ int ret;
+ struct i2c_adapter *adap = client->adapter;
+ struct i2c_msg msg;
+ u8 data[] = {reg, val};
+
+ msg.addr = client->addr + page;
+ msg.flags = 0;
+ msg.len = sizeof(data);
+ msg.buf = data;
+
+ ret = i2c_transfer(adap, &msg, 1);
+ if (ret != 1)
+ pr_warn("PS8622 I2C write (0x%02x,0x%02x,0x%02x) failed: %d\n",
+ client->addr + page, reg, val, ret);
+ return !(ret == 1);
+}
+
+static int ps8622_send_config(struct ps8622_dev *ps8622)
+{
+ struct i2c_client *cl = ps8622->client;
+ int err = 0;
+
+ /* wait 20ms after power ON */
+ usleep_range(20000, 30000);
+
+ err |= ps8622_set(cl, 0x02, 0xa1, 0x01); /* HPD low */
+ /* SW setting */
+ err |= ps8622_set(cl, 0x04, 0x14, 0x01); /* [1:0] SW output 1.2V voltage
+ * is lower to 96% */
+ /* RCO SS setting */
+ err |= ps8622_set(cl, 0x04, 0xe3, 0x20); /* [5:4] = b01 0.5%, b10 1%,
+ * b11 1.5% */
+ err |= ps8622_set(cl, 0x04, 0xe2, 0x80); /* [7] RCO SS enable */
+ /* RPHY Setting */
+ err |= ps8622_set(cl, 0x04, 0x8a, 0x0c); /* [3:2] CDR tune wait cycle
+ * before measure for fine tune
+ * b00: 1us b01: 0.5us b10:2us
+ * b11: 4us */
+ err |= ps8622_set(cl, 0x04, 0x89, 0x08); /* [3] RFD always on */
+ err |= ps8622_set(cl, 0x04, 0x71, 0x2d); /* CTN lock in/out:
+ * 20000ppm/80000ppm.
+ * Lock out 2 times. */
+ /* 2.7G CDR settings */
+ err |= ps8622_set(cl, 0x04, 0x7d, 0x07); /* NOF=40LSB for HBR CDR
+ * setting */
+ err |= ps8622_set(cl, 0x04, 0x7b, 0x00); /* [1:0] Fmin=+4bands */
+ err |= ps8622_set(cl, 0x04, 0x7a, 0xfd); /* [7:5] DCO_FTRNG=+-40% */
+ /* 1.62G CDR settings */
+ err |= ps8622_set(cl, 0x04, 0xc0, 0x12); /* [5:2]NOF=64LSB [1:0]DCO
+ * scale is 2/5 */
+ err |= ps8622_set(cl, 0x04, 0xc1, 0x92); /* Gitune=-37% */
+ err |= ps8622_set(cl, 0x04, 0xc2, 0x1c); /* Fbstep=100% */
+ err |= ps8622_set(cl, 0x04, 0x32, 0x80); /* [7] LOS signal disable */
+ /* RPIO Setting */
+ err |= ps8622_set(cl, 0x04, 0x00, 0xb0); /* [7:4] LVDS driver bias
+ * current : 75% (250mV swing)
+ * */
+ err |= ps8622_set(cl, 0x04, 0x15, 0x40); /* [7:6] Right-bar GPIO output
+ * strength is 8mA */
+ /* EQ Training State Machine Setting */
+ err |= ps8622_set(cl, 0x04, 0x54, 0x10); /* RCO calibration start */
+ /* Logic, needs more than 10 I2C command */
+ err |= ps8622_set(cl, 0x01, 0x02, 0x81); /* [4:0] MAX_LANE_COUNT set to
+ * one lane */
+ err |= ps8622_set(cl, 0x01, 0x21, 0x81); /* [4:0] LANE_COUNT_SET set to
+ * one lane (in case no-link
+ * traing conflict) */
+ err |= ps8622_set(cl, 0x00, 0x52, 0x20);
+ err |= ps8622_set(cl, 0x00, 0xf1, 0x03); /* HPD CP toggle enable */
+ err |= ps8622_set(cl, 0x00, 0x62, 0x41);
+ err |= ps8622_set(cl, 0x00, 0xf6, 0x01); /* Counter number, add 1ms
+ * counter delay */
+ err |= ps8622_set(cl, 0x00, 0x77, 0x06); /* [6]PWM function control by
+ * DPCD0040f[7], default is PWM
+ * block always works. */
+ err |= ps8622_set(cl, 0x00, 0x4c, 0x04); /* 04h Adjust VTotal tolerance
+ * to fix the 30Hz no display
+ * issue */
+ err |= ps8622_set(cl, 0x01, 0xc0, 0x00); /* DPCD00400='h00, Parade OUI =
+ * 'h001cf8 */
+ err |= ps8622_set(cl, 0x01, 0xc1, 0x1c); /* DPCD00401='h1c */
+ err |= ps8622_set(cl, 0x01, 0xc2, 0xf8); /* DPCD00402='hf8 */
+ err |= ps8622_set(cl, 0x01, 0xc3, 0x44); /* DPCD403~408 = ASCII code
+ * D2SLV5='h4432534c5635 */
+ err |= ps8622_set(cl, 0x01, 0xc4, 0x32); /* DPCD404 */
+ err |= ps8622_set(cl, 0x01, 0xc5, 0x53); /* DPCD405 */
+ err |= ps8622_set(cl, 0x01, 0xc6, 0x4c); /* DPCD406 */
+ err |= ps8622_set(cl, 0x01, 0xc7, 0x56); /* DPCD407 */
+ err |= ps8622_set(cl, 0x01, 0xc8, 0x35); /* DPCD408 */
+ err |= ps8622_set(cl, 0x01, 0xca, 0x01); /* DPCD40A, Initial Code major
+ * revision '01' */
+ err |= ps8622_set(cl, 0x01, 0xcb, 0x05); /* DPCD40B, Initial Code minor
+ * revision '05' */
+ err |= ps8622_set(cl, 0x01, 0xa5, 0xa0); /* DPCD720, internal PWM */
+ err |= ps8622_set(cl, 0x01, 0xa7, ps8622->bl->props.brightness);
+ /* FFh for 100% brightness,
+ * 0h for 0% brightness */
+ err |= ps8622_set(cl, 0x01, 0xcc, 0x13); /* Set LVDS output as 6bit-VESA
+ * mapping, single LVDS channel
+ * */
+ err |= ps8622_set(cl, 0x02, 0xb1, 0x20); /* Enable SSC set by register
+ * */
+ err |= ps8622_set(cl, 0x04, 0x10, 0x16); /* Set SSC enabled and +/-1%
+ * central spreading */
+ /* Logic end */
+ err |= ps8622_set(cl, 0x04, 0x59, 0x60); /* MPU Clock source: LC => RCO
+ * */
+ err |= ps8622_set(cl, 0x04, 0x54, 0x14); /* LC -> RCO */
+ err |= ps8622_set(cl, 0x02, 0xa1, 0x91); /* HPD high */
+
+ return err ? -EIO : 0;
+}
+
+static int ps8622_power_up(struct ps8622_dev *ps8622)
+{
+ struct ps8622_platform_data *pd = ps8622->pdata;
+
+ if (ps8622->v12)
+ regulator_enable(ps8622->v12);
+
+ if (pd->gpio_slp_n > 0)
+ gpio_set_value(pd->gpio_slp_n, 1);
+
+ if (pd->gpio_rst_n > 0) {
+ gpio_set_value(pd->gpio_rst_n, 0);
+ udelay(10);
+ gpio_set_value(pd->gpio_rst_n, 1);
+ }
+
+ return ps8622_send_config(ps8622);
+}
+
+static int ps8622_power_down(struct ps8622_dev *ps8622)
+{
+ struct ps8622_platform_data *pd = ps8622->pdata;
+
+ if (pd->gpio_rst_n > 0)
+ gpio_set_value(pd->gpio_rst_n, 1);
+
+ if (pd->gpio_slp_n > 0)
+ gpio_set_value(pd->gpio_slp_n, 0);
+
+ if (ps8622->v12)
+ regulator_disable(ps8622->v12);
+
+ return 0;
+}
+
+int ps8622_suspend(struct device *dev)
+{
+ struct i2c_client *client = container_of(dev, struct i2c_client, dev);
+ struct ps8622_dev *ps8622 = i2c_get_clientdata(client);
+
+ return ps8622_power_down(ps8622);
+}
+
+int ps8622_resume(struct device *dev)
+{
+ struct i2c_client *client = container_of(dev, struct i2c_client, dev);
+ struct ps8622_dev *ps8622 = i2c_get_clientdata(client);
+
+ return ps8622_power_up(ps8622);
+}
+
+static int ps8622_backlight_update(struct backlight_device *bl)
+{
+ struct ps8622_dev *ps8622 = dev_get_drvdata(&bl->dev);
+ int brightness = bl->props.brightness;
+
+ if (bl->props.power != FB_BLANK_UNBLANK ||
+ bl->props.state & (BL_CORE_SUSPENDED | BL_CORE_FBBLANK))
+ brightness = 0;
+
+ return ps8622_set(ps8622->client, 0x01, 0xa7, brightness);
+}
+
+static int ps8622_backlight_get(struct backlight_device *bl)
+{
+ return bl->props.brightness;
+}
+
+static const struct backlight_ops ps8622_backlight_ops = {
+ .update_status = ps8622_backlight_update,
+ .get_brightness = ps8622_backlight_get,
+};
+
+int ps8622_probe(struct i2c_client *client, const struct i2c_device_id *device)
+{
+ struct device *dev = &client->dev;
+ struct ps8622_platform_data *pd = dev->platform_data;
+ struct ps8622_dev *ps8622;
+ int ret;
+
+ ps8622 = devm_kzalloc(dev, sizeof(struct ps8622_dev), GFP_KERNEL);
+ if (!ps8622) {
+ dev_err(dev, "could not allocate memory\n");
+ return -ENOMEM;
+ }
+ ps8622->dev = dev;
+ ps8622->client = client;
+ i2c_set_clientdata(client, ps8622);
+
+ if (dev->of_node) {
+ pd = ps8622_parse_dt_pdata(dev);
+ if (IS_ERR(pd)) {
+ ret = PTR_ERR(pd);
+ goto err;
+ }
+ }
+ if (!pd) {
+ ret = -ENODEV;
+ dev_warn(dev, "No platform data found\n");
+ goto err;
+ }
+ ps8622->pdata = pd;
+
+ ps8622->v12 = regulator_get(dev, "vdd_bridge");
+ if (IS_ERR(ps8622->v12)) {
+ dev_warn(dev, "no 1.2v regulator found for PS8622\n");
+ ps8622->v12 = NULL;
+ }
+
+ if (pd->gpio_slp_n > 0) {
+ ret = gpio_request_one(pd->gpio_slp_n, GPIOF_OUT_INIT_HIGH,
+ "PS8622_SLP_N");
+ if (ret)
+ goto err;
+ }
+ if (pd->gpio_rst_n > 0) {
+ /*
+ * Request the reset pin low to avoid the bridge being
+ * initialized prematurely
+ */
+ ret = gpio_request_one(pd->gpio_rst_n, GPIOF_OUT_INIT_LOW,
+ "PS8622_RST_N");
+ if (ret)
+ goto err;
+ }
+
+ /* create a backlight interface for the bridge */
+ ps8622->bl = backlight_device_register("ps8622-backlight", dev, ps8622,
+ &ps8622_backlight_ops, NULL);
+ if (IS_ERR(ps8622->bl)) {
+ dev_err(dev, "failed to register backlight\n");
+ ret = PTR_ERR(ps8622->bl);
+ ps8622->bl = NULL;
+ goto err;
+ }
+ ps8622->bl->props.max_brightness = PS8622_MAX_BRIGHTNESS;
+ ps8622->bl->props.brightness = PS8622_MAX_BRIGHTNESS;
+
+ ret = ps8622_power_up(ps8622);
+ if (ret)
+ goto err;
+
+ return 0;
+
+err:
+ if (ps8622->bl)
+ backlight_device_unregister(ps8622->bl);
+ if (ps8622->v12)
+ regulator_put(ps8622->v12);
+ dev_err(dev, "device probe failed : %d\n", ret);
+ return ret;
+}
+
+int ps8622_remove(struct i2c_client *client)
+{
+ struct ps8622_dev *ps8622 = i2c_get_clientdata(client);
+
+ if (ps8622->bl)
+ backlight_device_unregister(ps8622->bl);
+ if (ps8622->v12)
+ regulator_put(ps8622->v12);
+ return 0;
+}
+
+static const struct i2c_device_id ps8622_ids[] = {
+ { "ps8622", 0 },
+ {},
+};
+MODULE_DEVICE_TABLE(i2c, ps8622_ids);
+
+static SIMPLE_DEV_PM_OPS(ps8622_pm_ops, ps8622_suspend, ps8622_resume);
+
+static struct i2c_driver ps8622_driver = {
+ .id_table = ps8622_ids,
+ .probe = ps8622_probe,
+ .remove = ps8622_remove,
+ .driver = {
+ .name = "ps8622",
+ .owner = THIS_MODULE,
+ .pm = &ps8622_pm_ops,
+ },
+};
+module_i2c_driver(ps8622_driver);
projects / cascardo / linux.git / commitdiff