bcm27xx: import latest patches from the RPi foundation

bcm2708: boot tested on RPi B+ v1.2
bcm2709: boot tested on RPi 3B v1.2 and RPi 4B v1.1 4G
bcm2710: boot tested on RPi 3B v1.2
bcm2711: boot tested on RPi 4B v1.1 4G

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>

1 files changed, 939 insertions, 0 deletions

diff --git a/target/linux/bcm27xx/patches-5.4/950-0816-media-i2c-Add-IMX290-CMOS-image-sensor-driver.patch b/target/linux/bcm27xx/patches-5.4/950-0816-media-i2c-Add-IMX290-CMOS-image-sensor-driver.patch
new file mode 100644
index 0000000000..a44aa767bd
--- /dev/null
+++ b/target/linux/bcm27xx/patches-5.4/950-0816-media-i2c-Add-IMX290-CMOS-image-sensor-driver.patch
@@ -0,0 +1,939 @@
+From d13c94482be9ca356df8a04f8fd5f3738dc31ab1 Mon Sep 17 00:00:00 2001
+From: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
+Date: Fri, 4 Oct 2019 13:05:25 -0300
+Subject: [PATCH] media: i2c: Add IMX290 CMOS image sensor driver
+
+Commit 828dbc299278065b634e913d2700d254a3224853 upstream.
+
+Add driver for Sony IMX290 CMOS image sensor driver. The driver only
+supports I2C interface for programming and MIPI CSI-2 for sensor output.
+
+[Sakari Ailus: Rewrapped a few lines over 80 chars a little.]
+
+Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
+Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
+Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
+---
+ drivers/media/i2c/Kconfig  |  11 +
+ drivers/media/i2c/Makefile |   1 +
+ drivers/media/i2c/imx290.c | 884 +++++++++++++++++++++++++++++++++++++
+ 3 files changed, 896 insertions(+)
+ create mode 100644 drivers/media/i2c/imx290.c
+
+--- a/drivers/media/i2c/Kconfig
++++ b/drivers/media/i2c/Kconfig
+@@ -609,6 +609,17 @@ config VIDEO_IMX274
+ 	  This is a V4L2 sensor driver for the Sony IMX274
+ 	  CMOS image sensor.
+ 
++config VIDEO_IMX290
++	tristate "Sony IMX290 sensor support"
++	depends on I2C && VIDEO_V4L2 && VIDEO_V4L2_SUBDEV_API
++	select V4L2_FWNODE
++	help
++	  This is a Video4Linux2 sensor driver for the Sony
++	  IMX290 camera sensor.
++
++	  To compile this driver as a module, choose M here: the
++	  module will be called imx290.
++
+ config VIDEO_IMX477
+ 	tristate "Sony IMX477 sensor support"
+ 	depends on I2C && VIDEO_V4L2 && VIDEO_V4L2_SUBDEV_API
+--- a/drivers/media/i2c/Makefile
++++ b/drivers/media/i2c/Makefile
+@@ -114,6 +114,7 @@ obj-$(CONFIG_VIDEO_IMX214)	+= imx214.o
+ obj-$(CONFIG_VIDEO_IMX219)	+= imx219.o
+ obj-$(CONFIG_VIDEO_IMX258)	+= imx258.o
+ obj-$(CONFIG_VIDEO_IMX274)	+= imx274.o
++obj-$(CONFIG_VIDEO_IMX290)	+= imx290.o
+ obj-$(CONFIG_VIDEO_IMX477)	+= imx477.o
+ obj-$(CONFIG_VIDEO_IMX319)	+= imx319.o
+ obj-$(CONFIG_VIDEO_IMX355)	+= imx355.o
+--- /dev/null
++++ b/drivers/media/i2c/imx290.c
+@@ -0,0 +1,884 @@
++// SPDX-License-Identifier: GPL-2.0
++/*
++ * Sony IMX290 CMOS Image Sensor Driver
++ *
++ * Copyright (C) 2019 FRAMOS GmbH.
++ *
++ * Copyright (C) 2019 Linaro Ltd.
++ * Author: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
++ */
++
++#include <linux/clk.h>
++#include <linux/delay.h>
++#include <linux/gpio/consumer.h>
++#include <linux/i2c.h>
++#include <linux/module.h>
++#include <linux/pm_runtime.h>
++#include <linux/regmap.h>
++#include <linux/regulator/consumer.h>
++#include <media/media-entity.h>
++#include <media/v4l2-ctrls.h>
++#include <media/v4l2-device.h>
++#include <media/v4l2-fwnode.h>
++#include <media/v4l2-subdev.h>
++
++#define IMX290_STANDBY 0x3000
++#define IMX290_REGHOLD 0x3001
++#define IMX290_XMSTA 0x3002
++#define IMX290_GAIN 0x3014
++
++#define IMX290_DEFAULT_LINK_FREQ 445500000
++
++static const char * const imx290_supply_name[] = {
++	"vdda",
++	"vddd",
++	"vdddo",
++};
++
++#define IMX290_NUM_SUPPLIES ARRAY_SIZE(imx290_supply_name)
++
++struct imx290_regval {
++	u16 reg;
++	u8 val;
++};
++
++struct imx290_mode {
++	u32 width;
++	u32 height;
++	u32 pixel_rate;
++	u32 link_freq_index;
++
++	const struct imx290_regval *data;
++	u32 data_size;
++};
++
++struct imx290 {
++	struct device *dev;
++	struct clk *xclk;
++	struct regmap *regmap;
++
++	struct v4l2_subdev sd;
++	struct v4l2_fwnode_endpoint ep;
++	struct media_pad pad;
++	struct v4l2_mbus_framefmt current_format;
++	const struct imx290_mode *current_mode;
++
++	struct regulator_bulk_data supplies[IMX290_NUM_SUPPLIES];
++	struct gpio_desc *rst_gpio;
++
++	struct v4l2_ctrl_handler ctrls;
++	struct v4l2_ctrl *link_freq;
++	struct v4l2_ctrl *pixel_rate;
++
++	struct mutex lock;
++};
++
++struct imx290_pixfmt {
++	u32 code;
++};
++
++static const struct imx290_pixfmt imx290_formats[] = {
++	{ MEDIA_BUS_FMT_SRGGB10_1X10 },
++};
++
++static const struct regmap_config imx290_regmap_config = {
++	.reg_bits = 16,
++	.val_bits = 8,
++	.cache_type = REGCACHE_RBTREE,
++};
++
++static const struct imx290_regval imx290_global_init_settings[] = {
++	{ 0x3007, 0x00 },
++	{ 0x3009, 0x00 },
++	{ 0x3018, 0x65 },
++	{ 0x3019, 0x04 },
++	{ 0x301a, 0x00 },
++	{ 0x3443, 0x03 },
++	{ 0x3444, 0x20 },
++	{ 0x3445, 0x25 },
++	{ 0x3407, 0x03 },
++	{ 0x303a, 0x0c },
++	{ 0x3040, 0x00 },
++	{ 0x3041, 0x00 },
++	{ 0x303c, 0x00 },
++	{ 0x303d, 0x00 },
++	{ 0x3042, 0x9c },
++	{ 0x3043, 0x07 },
++	{ 0x303e, 0x49 },
++	{ 0x303f, 0x04 },
++	{ 0x304b, 0x0a },
++	{ 0x300f, 0x00 },
++	{ 0x3010, 0x21 },
++	{ 0x3012, 0x64 },
++	{ 0x3016, 0x09 },
++	{ 0x3070, 0x02 },
++	{ 0x3071, 0x11 },
++	{ 0x309b, 0x10 },
++	{ 0x309c, 0x22 },
++	{ 0x30a2, 0x02 },
++	{ 0x30a6, 0x20 },
++	{ 0x30a8, 0x20 },
++	{ 0x30aa, 0x20 },
++	{ 0x30ac, 0x20 },
++	{ 0x30b0, 0x43 },
++	{ 0x3119, 0x9e },
++	{ 0x311c, 0x1e },
++	{ 0x311e, 0x08 },
++	{ 0x3128, 0x05 },
++	{ 0x313d, 0x83 },
++	{ 0x3150, 0x03 },
++	{ 0x317e, 0x00 },
++	{ 0x32b8, 0x50 },
++	{ 0x32b9, 0x10 },
++	{ 0x32ba, 0x00 },
++	{ 0x32bb, 0x04 },
++	{ 0x32c8, 0x50 },
++	{ 0x32c9, 0x10 },
++	{ 0x32ca, 0x00 },
++	{ 0x32cb, 0x04 },
++	{ 0x332c, 0xd3 },
++	{ 0x332d, 0x10 },
++	{ 0x332e, 0x0d },
++	{ 0x3358, 0x06 },
++	{ 0x3359, 0xe1 },
++	{ 0x335a, 0x11 },
++	{ 0x3360, 0x1e },
++	{ 0x3361, 0x61 },
++	{ 0x3362, 0x10 },
++	{ 0x33b0, 0x50 },
++	{ 0x33b2, 0x1a },
++	{ 0x33b3, 0x04 },
++};
++
++static const struct imx290_regval imx290_1080p_settings[] = {
++	/* mode settings */
++	{ 0x3007, 0x00 },
++	{ 0x303a, 0x0c },
++	{ 0x3414, 0x0a },
++	{ 0x3472, 0x80 },
++	{ 0x3473, 0x07 },
++	{ 0x3418, 0x38 },
++	{ 0x3419, 0x04 },
++	{ 0x3012, 0x64 },
++	{ 0x3013, 0x00 },
++	{ 0x305c, 0x18 },
++	{ 0x305d, 0x03 },
++	{ 0x305e, 0x20 },
++	{ 0x305f, 0x01 },
++	{ 0x315e, 0x1a },
++	{ 0x3164, 0x1a },
++	{ 0x3480, 0x49 },
++	/* data rate settings */
++	{ 0x3009, 0x01 },
++	{ 0x3405, 0x10 },
++	{ 0x3446, 0x57 },
++	{ 0x3447, 0x00 },
++	{ 0x3448, 0x37 },
++	{ 0x3449, 0x00 },
++	{ 0x344a, 0x1f },
++	{ 0x344b, 0x00 },
++	{ 0x344c, 0x1f },
++	{ 0x344d, 0x00 },
++	{ 0x344e, 0x1f },
++	{ 0x344f, 0x00 },
++	{ 0x3450, 0x77 },
++	{ 0x3451, 0x00 },
++	{ 0x3452, 0x1f },
++	{ 0x3453, 0x00 },
++	{ 0x3454, 0x17 },
++	{ 0x3455, 0x00 },
++	{ 0x301c, 0x98 },
++	{ 0x301d, 0x08 },
++};
++
++static const struct imx290_regval imx290_720p_settings[] = {
++	/* mode settings */
++	{ 0x3007, 0x10 },
++	{ 0x303a, 0x06 },
++	{ 0x3414, 0x04 },
++	{ 0x3472, 0x00 },
++	{ 0x3473, 0x05 },
++	{ 0x3418, 0xd0 },
++	{ 0x3419, 0x02 },
++	{ 0x3012, 0x64 },
++	{ 0x3013, 0x00 },
++	{ 0x305c, 0x20 },
++	{ 0x305d, 0x00 },
++	{ 0x305e, 0x20 },
++	{ 0x305f, 0x01 },
++	{ 0x315e, 0x1a },
++	{ 0x3164, 0x1a },
++	{ 0x3480, 0x49 },
++	/* data rate settings */
++	{ 0x3009, 0x01 },
++	{ 0x3405, 0x10 },
++	{ 0x3446, 0x4f },
++	{ 0x3447, 0x00 },
++	{ 0x3448, 0x2f },
++	{ 0x3449, 0x00 },
++	{ 0x344a, 0x17 },
++	{ 0x344b, 0x00 },
++	{ 0x344c, 0x17 },
++	{ 0x344d, 0x00 },
++	{ 0x344e, 0x17 },
++	{ 0x344f, 0x00 },
++	{ 0x3450, 0x57 },
++	{ 0x3451, 0x00 },
++	{ 0x3452, 0x17 },
++	{ 0x3453, 0x00 },
++	{ 0x3454, 0x17 },
++	{ 0x3455, 0x00 },
++	{ 0x301c, 0xe4 },
++	{ 0x301d, 0x0c },
++};
++
++static const struct imx290_regval imx290_10bit_settings[] = {
++	{ 0x3005, 0x00},
++	{ 0x3046, 0x00},
++	{ 0x3129, 0x1d},
++	{ 0x317c, 0x12},
++	{ 0x31ec, 0x37},
++	{ 0x3441, 0x0a},
++	{ 0x3442, 0x0a},
++	{ 0x300a, 0x3c},
++	{ 0x300b, 0x00},
++};
++
++/* supported link frequencies */
++static const s64 imx290_link_freq[] = {
++	IMX290_DEFAULT_LINK_FREQ,
++};
++
++/* Mode configs */
++static const struct imx290_mode imx290_modes[] = {
++	{
++		.width = 1920,
++		.height = 1080,
++		.data = imx290_1080p_settings,
++		.data_size = ARRAY_SIZE(imx290_1080p_settings),
++		.pixel_rate = 178200000,
++		.link_freq_index = 0,
++	},
++	{
++		.width = 1280,
++		.height = 720,
++		.data = imx290_720p_settings,
++		.data_size = ARRAY_SIZE(imx290_720p_settings),
++		.pixel_rate = 178200000,
++		.link_freq_index = 0,
++	},
++};
++
++static inline struct imx290 *to_imx290(struct v4l2_subdev *_sd)
++{
++	return container_of(_sd, struct imx290, sd);
++}
++
++static inline int imx290_read_reg(struct imx290 *imx290, u16 addr, u8 *value)
++{
++	unsigned int regval;
++	int ret;
++
++	ret = regmap_read(imx290->regmap, addr, &regval);
++	if (ret) {
++		dev_err(imx290->dev, "I2C read failed for addr: %x\n", addr);
++		return ret;
++	}
++
++	*value = regval & 0xff;
++
++	return 0;
++}
++
++static int imx290_write_reg(struct imx290 *imx290, u16 addr, u8 value)
++{
++	int ret;
++
++	ret = regmap_write(imx290->regmap, addr, value);
++	if (ret) {
++		dev_err(imx290->dev, "I2C write failed for addr: %x\n", addr);
++		return ret;
++	}
++
++	return ret;
++}
++
++static int imx290_set_register_array(struct imx290 *imx290,
++				     const struct imx290_regval *settings,
++				     unsigned int num_settings)
++{
++	unsigned int i;
++	int ret;
++
++	for (i = 0; i < num_settings; ++i, ++settings) {
++		ret = imx290_write_reg(imx290, settings->reg, settings->val);
++		if (ret < 0)
++			return ret;
++
++		/* Settle time is 10ms for all registers */
++		msleep(10);
++	}
++
++	return 0;
++}
++
++static int imx290_write_buffered_reg(struct imx290 *imx290, u16 address_low,
++				     u8 nr_regs, u32 value)
++{
++	unsigned int i;
++	int ret;
++
++	ret = imx290_write_reg(imx290, IMX290_REGHOLD, 0x01);
++	if (ret) {
++		dev_err(imx290->dev, "Error setting hold register\n");
++		return ret;
++	}
++
++	for (i = 0; i < nr_regs; i++) {
++		ret = imx290_write_reg(imx290, address_low + i,
++				       (u8)(value >> (i * 8)));
++		if (ret) {
++			dev_err(imx290->dev, "Error writing buffered registers\n");
++			return ret;
++		}
++	}
++
++	ret = imx290_write_reg(imx290, IMX290_REGHOLD, 0x00);
++	if (ret) {
++		dev_err(imx290->dev, "Error setting hold register\n");
++		return ret;
++	}
++
++	return ret;
++}
++
++static int imx290_set_gain(struct imx290 *imx290, u32 value)
++{
++	int ret;
++
++	ret = imx290_write_buffered_reg(imx290, IMX290_GAIN, 1, value);
++	if (ret)
++		dev_err(imx290->dev, "Unable to write gain\n");
++
++	return ret;
++}
++
++/* Stop streaming */
++static int imx290_stop_streaming(struct imx290 *imx290)
++{
++	int ret;
++
++	ret = imx290_write_reg(imx290, IMX290_STANDBY, 0x01);
++	if (ret < 0)
++		return ret;
++
++	msleep(30);
++
++	return imx290_write_reg(imx290, IMX290_XMSTA, 0x01);
++}
++
++static int imx290_set_ctrl(struct v4l2_ctrl *ctrl)
++{
++	struct imx290 *imx290 = container_of(ctrl->handler,
++					     struct imx290, ctrls);
++	int ret = 0;
++
++	/* V4L2 controls values will be applied only when power is already up */
++	if (!pm_runtime_get_if_in_use(imx290->dev))
++		return 0;
++
++	switch (ctrl->id) {
++	case V4L2_CID_GAIN:
++		ret = imx290_set_gain(imx290, ctrl->val);
++		break;
++	default:
++		ret = -EINVAL;
++		break;
++	}
++
++	pm_runtime_put(imx290->dev);
++
++	return ret;
++}
++
++static const struct v4l2_ctrl_ops imx290_ctrl_ops = {
++	.s_ctrl = imx290_set_ctrl,
++};
++
++static int imx290_enum_mbus_code(struct v4l2_subdev *sd,
++				 struct v4l2_subdev_pad_config *cfg,
++				 struct v4l2_subdev_mbus_code_enum *code)
++{
++	if (code->index >= ARRAY_SIZE(imx290_formats))
++		return -EINVAL;
++
++	code->code = imx290_formats[code->index].code;
++
++	return 0;
++}
++
++static int imx290_get_fmt(struct v4l2_subdev *sd,
++			  struct v4l2_subdev_pad_config *cfg,
++			  struct v4l2_subdev_format *fmt)
++{
++	struct imx290 *imx290 = to_imx290(sd);
++	struct v4l2_mbus_framefmt *framefmt;
++
++	mutex_lock(&imx290->lock);
++
++	if (fmt->which == V4L2_SUBDEV_FORMAT_TRY)
++		framefmt = v4l2_subdev_get_try_format(&imx290->sd, cfg,
++						      fmt->pad);
++	else
++		framefmt = &imx290->current_format;
++
++	fmt->format = *framefmt;
++
++	mutex_unlock(&imx290->lock);
++
++	return 0;
++}
++
++static int imx290_set_fmt(struct v4l2_subdev *sd,
++			  struct v4l2_subdev_pad_config *cfg,
++		      struct v4l2_subdev_format *fmt)
++{
++	struct imx290 *imx290 = to_imx290(sd);
++	const struct imx290_mode *mode;
++	struct v4l2_mbus_framefmt *format;
++	unsigned int i;
++
++	mutex_lock(&imx290->lock);
++
++	mode = v4l2_find_nearest_size(imx290_modes,
++				      ARRAY_SIZE(imx290_modes),
++				      width, height,
++				      fmt->format.width, fmt->format.height);
++
++	fmt->format.width = mode->width;
++	fmt->format.height = mode->height;
++
++	for (i = 0; i < ARRAY_SIZE(imx290_formats); i++)
++		if (imx290_formats[i].code == fmt->format.code)
++			break;
++
++	if (i >= ARRAY_SIZE(imx290_formats))
++		i = 0;
++
++	fmt->format.code = imx290_formats[i].code;
++	fmt->format.field = V4L2_FIELD_NONE;
++
++	if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
++		format = v4l2_subdev_get_try_format(sd, cfg, fmt->pad);
++	} else {
++		format = &imx290->current_format;
++		__v4l2_ctrl_s_ctrl(imx290->link_freq, mode->link_freq_index);
++		__v4l2_ctrl_s_ctrl_int64(imx290->pixel_rate, mode->pixel_rate);
++
++		imx290->current_mode = mode;
++	}
++
++	*format = fmt->format;
++
++	mutex_unlock(&imx290->lock);
++
++	return 0;
++}
++
++static int imx290_entity_init_cfg(struct v4l2_subdev *subdev,
++				  struct v4l2_subdev_pad_config *cfg)
++{
++	struct v4l2_subdev_format fmt = { 0 };
++
++	fmt.which = cfg ? V4L2_SUBDEV_FORMAT_TRY : V4L2_SUBDEV_FORMAT_ACTIVE;
++	fmt.format.width = 1920;
++	fmt.format.height = 1080;
++
++	imx290_set_fmt(subdev, cfg, &fmt);
++
++	return 0;
++}
++
++static int imx290_write_current_format(struct imx290 *imx290,
++				       struct v4l2_mbus_framefmt *format)
++{
++	int ret;
++
++	switch (format->code) {
++	case MEDIA_BUS_FMT_SRGGB10_1X10:
++		ret = imx290_set_register_array(imx290, imx290_10bit_settings,
++						ARRAY_SIZE(
++							imx290_10bit_settings));
++		if (ret < 0) {
++			dev_err(imx290->dev, "Could not set format registers\n");
++			return ret;
++		}
++		break;
++	default:
++		dev_err(imx290->dev, "Unknown pixel format\n");
++		return -EINVAL;
++	}
++
++	return 0;
++}
++
++/* Start streaming */
++static int imx290_start_streaming(struct imx290 *imx290)
++{
++	int ret;
++
++	/* Set init register settings */
++	ret = imx290_set_register_array(imx290, imx290_global_init_settings,
++					ARRAY_SIZE(
++						imx290_global_init_settings));
++	if (ret < 0) {
++		dev_err(imx290->dev, "Could not set init registers\n");
++		return ret;
++	}
++
++	/* Set current frame format */
++	ret = imx290_write_current_format(imx290, &imx290->current_format);
++	if (ret < 0) {
++		dev_err(imx290->dev, "Could not set frame format\n");
++		return ret;
++	}
++
++	/* Apply default values of current mode */
++	ret = imx290_set_register_array(imx290, imx290->current_mode->data,
++					imx290->current_mode->data_size);
++	if (ret < 0) {
++		dev_err(imx290->dev, "Could not set current mode\n");
++		return ret;
++	}
++
++	/* Apply customized values from user */
++	ret = v4l2_ctrl_handler_setup(imx290->sd.ctrl_handler);
++	if (ret) {
++		dev_err(imx290->dev, "Could not sync v4l2 controls\n");
++		return ret;
++	}
++
++	ret = imx290_write_reg(imx290, IMX290_STANDBY, 0x00);
++	if (ret < 0)
++		return ret;
++
++	msleep(30);
++
++	/* Start streaming */
++	return imx290_write_reg(imx290, IMX290_XMSTA, 0x00);
++}
++
++static int imx290_set_stream(struct v4l2_subdev *sd, int enable)
++{
++	struct imx290 *imx290 = to_imx290(sd);
++	int ret = 0;
++
++	if (enable) {
++		ret = pm_runtime_get_sync(imx290->dev);
++		if (ret < 0) {
++			pm_runtime_put_noidle(imx290->dev);
++			goto unlock_and_return;
++		}
++
++		ret = imx290_start_streaming(imx290);
++		if (ret) {
++			dev_err(imx290->dev, "Start stream failed\n");
++			pm_runtime_put(imx290->dev);
++			goto unlock_and_return;
++		}
++	} else {
++		imx290_stop_streaming(imx290);
++		pm_runtime_put(imx290->dev);
++	}
++
++unlock_and_return:
++
++	return ret;
++}
++
++static int imx290_get_regulators(struct device *dev, struct imx290 *imx290)
++{
++	unsigned int i;
++
++	for (i = 0; i < IMX290_NUM_SUPPLIES; i++)
++		imx290->supplies[i].supply = imx290_supply_name[i];
++
++	return devm_regulator_bulk_get(dev, IMX290_NUM_SUPPLIES,
++				       imx290->supplies);
++}
++
++static int imx290_power_on(struct device *dev)
++{
++	struct i2c_client *client = to_i2c_client(dev);
++	struct v4l2_subdev *sd = i2c_get_clientdata(client);
++	struct imx290 *imx290 = to_imx290(sd);
++	int ret;
++
++	ret = clk_prepare_enable(imx290->xclk);
++	if (ret) {
++		dev_err(imx290->dev, "Failed to enable clock\n");
++		return ret;
++	}
++
++	ret = regulator_bulk_enable(IMX290_NUM_SUPPLIES, imx290->supplies);
++	if (ret) {
++		dev_err(imx290->dev, "Failed to enable regulators\n");
++		clk_disable_unprepare(imx290->xclk);
++		return ret;
++	}
++
++	usleep_range(1, 2);
++	gpiod_set_value_cansleep(imx290->rst_gpio, 1);
++	usleep_range(30000, 31000);
++
++	return 0;
++}
++
++static int imx290_power_off(struct device *dev)
++{
++	struct i2c_client *client = to_i2c_client(dev);
++	struct v4l2_subdev *sd = i2c_get_clientdata(client);
++	struct imx290 *imx290 = to_imx290(sd);
++
++	clk_disable_unprepare(imx290->xclk);
++	gpiod_set_value_cansleep(imx290->rst_gpio, 0);
++	regulator_bulk_disable(IMX290_NUM_SUPPLIES, imx290->supplies);
++
++	return 0;
++}
++
++static const struct dev_pm_ops imx290_pm_ops = {
++	SET_RUNTIME_PM_OPS(imx290_power_on, imx290_power_off, NULL)
++};
++
++static const struct v4l2_subdev_video_ops imx290_video_ops = {
++	.s_stream = imx290_set_stream,
++};
++
++static const struct v4l2_subdev_pad_ops imx290_pad_ops = {
++	.init_cfg = imx290_entity_init_cfg,
++	.enum_mbus_code = imx290_enum_mbus_code,
++	.get_fmt = imx290_get_fmt,
++	.set_fmt = imx290_set_fmt,
++};
++
++static const struct v4l2_subdev_ops imx290_subdev_ops = {
++	.video = &imx290_video_ops,
++	.pad = &imx290_pad_ops,
++};
++
++static const struct media_entity_operations imx290_subdev_entity_ops = {
++	.link_validate = v4l2_subdev_link_validate,
++};
++
++static int imx290_probe(struct i2c_client *client)
++{
++	struct device *dev = &client->dev;
++	struct fwnode_handle *endpoint;
++	struct imx290 *imx290;
++	u32 xclk_freq;
++	int ret;
++
++	imx290 = devm_kzalloc(dev, sizeof(*imx290), GFP_KERNEL);
++	if (!imx290)
++		return -ENOMEM;
++
++	imx290->dev = dev;
++	imx290->regmap = devm_regmap_init_i2c(client, &imx290_regmap_config);
++	if (IS_ERR(imx290->regmap)) {
++		dev_err(dev, "Unable to initialize I2C\n");
++		return -ENODEV;
++	}
++
++	endpoint = fwnode_graph_get_next_endpoint(dev_fwnode(dev), NULL);
++	if (!endpoint) {
++		dev_err(dev, "Endpoint node not found\n");
++		return -EINVAL;
++	}
++
++	ret = v4l2_fwnode_endpoint_alloc_parse(endpoint, &imx290->ep);
++	fwnode_handle_put(endpoint);
++	if (ret) {
++		dev_err(dev, "Parsing endpoint node failed\n");
++		goto free_err;
++	}
++
++	if (!imx290->ep.nr_of_link_frequencies) {
++		dev_err(dev, "link-frequency property not found in DT\n");
++		ret = -EINVAL;
++		goto free_err;
++	}
++
++	if (imx290->ep.link_frequencies[0] != IMX290_DEFAULT_LINK_FREQ) {
++		dev_err(dev, "Unsupported link frequency\n");
++		ret = -EINVAL;
++		goto free_err;
++	}
++
++	/* Only CSI2 is supported for now */
++	if (imx290->ep.bus_type != V4L2_MBUS_CSI2_DPHY) {
++		dev_err(dev, "Unsupported bus type, should be CSI2\n");
++		ret = -EINVAL;
++		goto free_err;
++	}
++
++	/* Set default mode to max resolution */
++	imx290->current_mode = &imx290_modes[0];
++
++	/* get system clock (xclk) */
++	imx290->xclk = devm_clk_get(dev, "xclk");
++	if (IS_ERR(imx290->xclk)) {
++		dev_err(dev, "Could not get xclk");
++		ret = PTR_ERR(imx290->xclk);
++		goto free_err;
++	}
++
++	ret = fwnode_property_read_u32(dev_fwnode(dev), "clock-frequency",
++				       &xclk_freq);
++	if (ret) {
++		dev_err(dev, "Could not get xclk frequency\n");
++		goto free_err;
++	}
++
++	/* external clock must be 37.125 MHz */
++	if (xclk_freq != 37125000) {
++		dev_err(dev, "External clock frequency %u is not supported\n",
++			xclk_freq);
++		ret = -EINVAL;
++		goto free_err;
++	}
++
++	ret = clk_set_rate(imx290->xclk, xclk_freq);
++	if (ret) {
++		dev_err(dev, "Could not set xclk frequency\n");
++		goto free_err;
++	}
++
++	ret = imx290_get_regulators(dev, imx290);
++	if (ret < 0) {
++		dev_err(dev, "Cannot get regulators\n");
++		goto free_err;
++	}
++
++	imx290->rst_gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_ASIS);
++	if (IS_ERR(imx290->rst_gpio)) {
++		dev_err(dev, "Cannot get reset gpio\n");
++		ret = PTR_ERR(imx290->rst_gpio);
++		goto free_err;
++	}
++
++	mutex_init(&imx290->lock);
++
++	v4l2_ctrl_handler_init(&imx290->ctrls, 3);
++
++	v4l2_ctrl_new_std(&imx290->ctrls, &imx290_ctrl_ops,
++			  V4L2_CID_GAIN, 0, 72, 1, 0);
++	imx290->link_freq =
++		v4l2_ctrl_new_int_menu(&imx290->ctrls,
++				       &imx290_ctrl_ops,
++				       V4L2_CID_LINK_FREQ,
++				       ARRAY_SIZE(imx290_link_freq) - 1,
++				       0, imx290_link_freq);
++	if (imx290->link_freq)
++		imx290->link_freq->flags |= V4L2_CTRL_FLAG_READ_ONLY;
++
++	imx290->pixel_rate = v4l2_ctrl_new_std(&imx290->ctrls, &imx290_ctrl_ops,
++					       V4L2_CID_PIXEL_RATE, 1,
++					       INT_MAX, 1,
++					       imx290_modes[0].pixel_rate);
++
++	imx290->sd.ctrl_handler = &imx290->ctrls;
++
++	if (imx290->ctrls.error) {
++		dev_err(dev, "Control initialization error %d\n",
++			imx290->ctrls.error);
++		ret = imx290->ctrls.error;
++		goto free_ctrl;
++	}
++
++	v4l2_i2c_subdev_init(&imx290->sd, client, &imx290_subdev_ops);
++	imx290->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
++	imx290->sd.dev = &client->dev;
++	imx290->sd.entity.ops = &imx290_subdev_entity_ops;
++	imx290->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR;
++
++	imx290->pad.flags = MEDIA_PAD_FL_SOURCE;
++	ret = media_entity_pads_init(&imx290->sd.entity, 1, &imx290->pad);
++	if (ret < 0) {
++		dev_err(dev, "Could not register media entity\n");
++		goto free_ctrl;
++	}
++
++	ret = v4l2_async_register_subdev(&imx290->sd);
++	if (ret < 0) {
++		dev_err(dev, "Could not register v4l2 device\n");
++		goto free_entity;
++	}
++
++	/* Power on the device to match runtime PM state below */
++	ret = imx290_power_on(dev);
++	if (ret < 0) {
++		dev_err(dev, "Could not power on the device\n");
++		goto free_entity;
++	}
++
++	pm_runtime_set_active(dev);
++	pm_runtime_enable(dev);
++	pm_runtime_idle(dev);
++
++	v4l2_fwnode_endpoint_free(&imx290->ep);
++
++	return 0;
++
++free_entity:
++	media_entity_cleanup(&imx290->sd.entity);
++free_ctrl:
++	v4l2_ctrl_handler_free(&imx290->ctrls);
++	mutex_destroy(&imx290->lock);
++free_err:
++	v4l2_fwnode_endpoint_free(&imx290->ep);
++
++	return ret;
++}
++
++static int imx290_remove(struct i2c_client *client)
++{
++	struct v4l2_subdev *sd = i2c_get_clientdata(client);
++	struct imx290 *imx290 = to_imx290(sd);
++
++	v4l2_async_unregister_subdev(sd);
++	media_entity_cleanup(&sd->entity);
++	v4l2_ctrl_handler_free(sd->ctrl_handler);
++
++	mutex_destroy(&imx290->lock);
++
++	pm_runtime_disable(imx290->dev);
++	if (!pm_runtime_status_suspended(imx290->dev))
++		imx290_power_off(imx290->dev);
++	pm_runtime_set_suspended(imx290->dev);
++
++	return 0;
++}
++
++static const struct of_device_id imx290_of_match[] = {
++	{ .compatible = "sony,imx290" },
++	{ /* sentinel */ }
++};
++MODULE_DEVICE_TABLE(of, imx290_of_match);
++
++static struct i2c_driver imx290_i2c_driver = {
++	.probe_new  = imx290_probe,
++	.remove = imx290_remove,
++	.driver = {
++		.name  = "imx290",
++		.pm = &imx290_pm_ops,
++		.of_match_table = of_match_ptr(imx290_of_match),
++	},
++};
++
++module_i2c_driver(imx290_i2c_driver);
++
++MODULE_DESCRIPTION("Sony IMX290 CMOS Image Sensor Driver");
++MODULE_AUTHOR("FRAMOS GmbH");
++MODULE_AUTHOR("Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>");
++MODULE_LICENSE("GPL v2");