[PATCH v4 3/4] media: i2c: Add a driver for the Galaxycore GC5035 sensor

[Tomasz Figa <tfiga@chromium.org>]

From: Hao He <hao.he@bitland.com.cn>

Galaxycore GC5035 is a 5 Mpix 10-bit Bayer sensor with a 2-lane MIPI
CSI-2 data and I2C control interfaces.

For the iniitial version support 2592x1944@30fps, 1296x972@30fps and
1280x720@60fps modes, assuming link frequency of 438 MHz and external
clock of 24 MHz.

Signed-off-by: Hao He <hao.he@bitland.com.cn>
Signed-off-by: Xingyu Wu <wuxy@bitland.com.cn>
[tfiga: Moved OTP handling to separate patch and fixed review comments.]
Signed-off-by: Tomasz Figa <tfiga@chromium.org>
---
 MAINTAINERS                |    7 +
 drivers/media/i2c/Kconfig  |   13 +
 drivers/media/i2c/Makefile |    1 +
 drivers/media/i2c/gc5035.c | 1494 ++++++++++++++++++++++++++++++++++++
 4 files changed, 1515 insertions(+)
 create mode 100644 drivers/media/i2c/gc5035.c

diff --git a/MAINTAINERS b/MAINTAINERS
index b7a09406aff0..4e09cfc7c924 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -7249,6 +7249,13 @@ F:	kernel/futex.c
 F:	tools/perf/bench/futex*
 F:	tools/testing/selftests/futex/
 
+GALAXYCORE GC5035 SENSOR DRIVER
+M:	Tomasz Figa <tfiga@chromium.org>
+L:	linux-media@vger.kernel.org
+S:	Maintained
+T:	git git://linuxtv.org/media_tree.git
+F:	drivers/media/i2c/gc5035.c
+
 GATEWORKS SYSTEM CONTROLLER (GSC) DRIVER
 M:	Tim Harvey <tharvey@gateworks.com>
 M:	Robert Jones <rjones@gateworks.com>
diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig
index 878f66ef2719..aff639aba3ac 100644
--- a/drivers/media/i2c/Kconfig
+++ b/drivers/media/i2c/Kconfig
@@ -725,6 +725,19 @@ config VIDEO_APTINA_PLL
 config VIDEO_SMIAPP_PLL
 	tristate
 
+config VIDEO_GC5035
+	tristate "Galaxycore GC5035 sensor support"
+	depends on I2C && VIDEO_V4L2
+	select MEDIA_CONTROLLER
+	select V4L2_FWNODE
+	select VIDEO_V4L2_SUBDEV_API
+	help
+	  This is a Video4Linux2 sensor driver for the Galaxycore
+	  GC5035 imaging sensor.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called gc5035.
+
 config VIDEO_HI556
 	tristate "Hynix Hi-556 sensor support"
 	depends on I2C && VIDEO_V4L2
diff --git a/drivers/media/i2c/Makefile b/drivers/media/i2c/Makefile
index f0a77473979d..0645c50c4145 100644
--- a/drivers/media/i2c/Makefile
+++ b/drivers/media/i2c/Makefile
@@ -123,5 +123,6 @@ obj-$(CONFIG_VIDEO_MAX9286)	+= max9286.o
 rdacm20-camera_module-objs	:= rdacm20.o max9271.o
 obj-$(CONFIG_VIDEO_RDACM20)	+= rdacm20-camera_module.o
 obj-$(CONFIG_VIDEO_ST_MIPID02) += st-mipid02.o
+obj-$(CONFIG_VIDEO_GC5035) += gc5035.o
 
 obj-$(CONFIG_SDR_MAX2175) += max2175.o
diff --git a/drivers/media/i2c/gc5035.c b/drivers/media/i2c/gc5035.c
new file mode 100644
index 000000000000..12e1b3a430b5
--- /dev/null
+++ b/drivers/media/i2c/gc5035.c
@@ -0,0 +1,1494 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (c) 2020 Bitland Inc.
+// Copyright 2020 Google LLC.
+
+#include <linux/clk.h>
+#include <linux/device.h>
+#include <linux/delay.h>
+#include <linux/gpio/consumer.h>
+#include <linux/i2c.h>
+#include <linux/iopoll.h>
+#include <linux/module.h>
+#include <linux/pm_runtime.h>
+#include <linux/property.h>
+#include <linux/regulator/consumer.h>
+#include <media/media-entity.h>
+#include <media/v4l2-async.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-fwnode.h>
+#include <media/v4l2-subdev.h>
+
+/* External clock frequency supported by the driver */
+#define GC5035_MCLK_RATE				24000000UL
+/* Number of lanes supported by this driver */
+#define GC5035_DATA_LANES				2
+/* Bits per sample of sensor output */
+#define GC5035_BITS_PER_SAMPLE				10
+
+/* System registers (accessible regardless of the page. */
+
+/* Chip ID */
+#define GC5035_REG_CHIP_ID_H				0xf0
+#define GC5035_REG_CHIP_ID_L				0xf1
+#define GC5035_CHIP_ID						0x5035
+#define GC5035_ID(_msb, _lsb)				((_msb) << 8 | (_lsb))
+
+/* Register page selection register */
+#define GC5035_PAGE_REG					0xfe
+
+/* Page 0 registers */
+
+/* Exposure control */
+#define GC5035_REG_EXPOSURE_H				0x03
+#define GC5035_REG_EXPOSURE_L				0x04
+#define GC5035_EXPOSURE_H_MASK				0x3f
+#define GC5035_EXPOSURE_MIN				4
+#define GC5035_EXPOSURE_STEP				1
+
+/* Analog gain control */
+#define GC5035_REG_ANALOG_GAIN				0xb6
+#define GC5035_ANALOG_GAIN_MIN				0
+#define GC5035_ANALOG_GAIN_MAX				31
+#define GC5035_ANALOG_GAIN_STEP				1
+#define GC5035_ANALOG_GAIN_DEFAULT			GC5035_ANALOG_GAIN_MIN
+
+/* Digital gain control */
+#define GC5035_REG_DIGI_GAIN_H				0xb1
+#define GC5035_REG_DIGI_GAIN_L				0xb2
+#define GC5035_DGAIN_H_MASK				0x0f
+#define GC5035_DGAIN_L_MASK				0xfc
+#define GC5035_DGAIN_L_SHIFT				2
+#define GC5035_DIGI_GAIN_MIN				0
+#define GC5035_DIGI_GAIN_MAX				1023
+#define GC5035_DIGI_GAIN_STEP				1
+#define GC5035_DIGI_GAIN_DEFAULT			GC5035_DIGI_GAIN_MAX
+
+/* Vblank control */
+#define GC5035_REG_VTS_H				0x41
+#define GC5035_REG_VTS_L				0x42
+#define GC5035_VTS_H_MASK				0x3f
+#define GC5035_VTS_MAX					16383
+#define GC5035_EXPOSURE_MARGIN				16
+
+#define GC5035_REG_CTRL_MODE				0x3e
+#define GC5035_MODE_SW_STANDBY				0x01
+#define GC5035_MODE_STREAMING				0x91
+
+/* Page 1 registers */
+
+/* Test pattern control */
+#define GC5035_REG_TEST_PATTERN				0x8c
+#define GC5035_TEST_PATTERN_ENABLE			0x11
+#define GC5035_TEST_PATTERN_DISABLE			0x10
+
+static const char * const gc5035_supplies[] = {
+	/*
+	 * Requested separately due to power sequencing needs:
+	 * "iovdd",	 * Power supply for I/O circuits *
+	 */
+	"dvdd12",	/* Digital core power */
+	"avdd21",	/* Analog power */
+};
+
+struct gc5035_regval {
+	u8 addr;
+	u8 val;
+};
+
+struct gc5035_mode {
+	u32 width;
+	u32 height;
+	u32 max_fps;
+	u32 hts_def;
+	u32 vts_def;
+	u32 exp_def;
+	const struct gc5035_regval *reg_list;
+	size_t num_regs;
+};
+
+struct gc5035 {
+	struct i2c_client *client;
+	struct clk *mclk;
+	unsigned long mclk_rate;
+	struct gpio_desc *resetb_gpio;
+	struct gpio_desc *pwdn_gpio;
+	struct regulator *iovdd_supply;
+	struct regulator_bulk_data supplies[ARRAY_SIZE(gc5035_supplies)];
+
+	struct v4l2_subdev subdev;
+	struct media_pad pad;
+	struct v4l2_ctrl_handler ctrl_handler;
+	struct v4l2_ctrl *exposure;
+	struct v4l2_ctrl *hblank;
+	struct v4l2_ctrl *vblank;
+
+	/*
+	 * Serialize control access, get/set format, get selection
+	 * and start streaming.
+	 */
+	struct mutex mutex;
+	bool streaming;
+	const struct gc5035_mode *cur_mode;
+};
+
+static inline struct gc5035 *to_gc5035(struct v4l2_subdev *sd)
+{
+	return container_of(sd, struct gc5035, subdev);
+}
+
+/*
+ * Xclk 24Mhz
+ * Pclk 87.6Mhz
+ * grabwindow_width 2592
+ * grabwindow_height 1944
+ * max_framerate 30fps
+ * mipi_datarate per lane 876Mbps
+ */
+static const struct gc5035_regval gc5035_global_regs[] = {
+	/*init*/
+	{0xfc, 0x01},
+	{0xf4, 0x40},
+	{0xf5, 0xe9},
+	{0xf6, 0x14},
+	{0xf8, 0x49},
+	{0xf9, 0x82},
+	{0xfa, 0x00},
+	{0xfc, 0x81},
+	{0xfe, 0x00},
+	{0x36, 0x01},
+	{0xd3, 0x87},
+	{0x36, 0x00},
+	{0x33, 0x00},
+	{0xfe, 0x03},
+	{0x01, 0xe7},
+	{0xf7, 0x01},
+	{0xfc, 0x8f},
+	{0xfc, 0x8f},
+	{0xfc, 0x8e},
+	{0xfe, 0x00},
+	{0xee, 0x30},
+	{0x87, 0x18},
+	{0xfe, 0x01},
+	{0x8c, 0x90},
+	{0xfe, 0x00},
+
+	/* Analog & CISCTL */
+	{0xfe, 0x00},
+	{0x05, 0x02},
+	{0x06, 0xda},
+	{0x9d, 0x0c},
+	{0x09, 0x00},
+	{0x0a, 0x04},
+	{0x0b, 0x00},
+	{0x0c, 0x03},
+	{0x0d, 0x07},
+	{0x0e, 0xa8},
+	{0x0f, 0x0a},
+	{0x10, 0x30},
+	{0x11, 0x02},
+	{0x17, 0x80},
+	{0x19, 0x05},
+	{0xfe, 0x02},
+	{0x30, 0x03},
+	{0x31, 0x03},
+	{0xfe, 0x00},
+	{0xd9, 0xc0},
+	{0x1b, 0x20},
+	{0x21, 0x48},
+	{0x28, 0x22},
+	{0x29, 0x58},
+	{0x44, 0x20},
+	{0x4b, 0x10},
+	{0x4e, 0x1a},
+	{0x50, 0x11},
+	{0x52, 0x33},
+	{0x53, 0x44},
+	{0x55, 0x10},
+	{0x5b, 0x11},
+	{0xc5, 0x02},
+	{0x8c, 0x1a},
+	{0xfe, 0x02},
+	{0x33, 0x05},
+	{0x32, 0x38},
+	{0xfe, 0x00},
+	{0x91, 0x80},
+	{0x92, 0x28},
+	{0x93, 0x20},
+	{0x95, 0xa0},
+	{0x96, 0xe0},
+	{0xd5, 0xfc},
+	{0x97, 0x28},
+	{0x16, 0x0c},
+	{0x1a, 0x1a},
+	{0x1f, 0x11},
+	{0x20, 0x10},
+	{0x46, 0x83},
+	{0x4a, 0x04},
+	{0x54, 0x02},
+	{0x62, 0x00},
+	{0x72, 0x8f},
+	{0x73, 0x89},
+	{0x7a, 0x05},
+	{0x7d, 0xcc},
+	{0x90, 0x00},
+	{0xce, 0x18},
+	{0xd0, 0xb2},
+	{0xd2, 0x40},
+	{0xe6, 0xe0},
+	{0xfe, 0x02},
+	{0x12, 0x01},
+	{0x13, 0x01},
+	{0x14, 0x01},
+	{0x15, 0x02},
+	{0x22, 0x7c},
+	{0x91, 0x00},
+	{0x92, 0x00},
+	{0x93, 0x00},
+	{0x94, 0x00},
+	{0xfe, 0x00},
+	{0xfc, 0x88},
+	{0xfe, 0x10},
+	{0xfe, 0x00},
+	{0xfc, 0x8e},
+	{0xfe, 0x00},
+	{0xfe, 0x00},
+	{0xfe, 0x00},
+	{0xfc, 0x88},
+	{0xfe, 0x10},
+	{0xfe, 0x00},
+	{0xfc, 0x8e},
+
+	/* Gain */
+	{0xfe, 0x00},
+	{0xb0, 0x6e},
+	{0xb1, 0x01},
+	{0xb2, 0x00},
+	{0xb3, 0x00},
+	{0xb4, 0x00},
+	{0xb6, 0x00},
+
+	/* ISP */
+	{0xfe, 0x01},
+	{0x53, 0x00},
+	{0x89, 0x03},
+	{0x60, 0x40},
+
+	/* BLK */
+	{0xfe, 0x01},
+	{0x42, 0x21},
+	{0x49, 0x03},
+	{0x4a, 0xff},
+	{0x4b, 0xc0},
+	{0x55, 0x00},
+
+	/* Anti_blooming */
+	{0xfe, 0x01},
+	{0x41, 0x28},
+	{0x4c, 0x00},
+	{0x4d, 0x00},
+	{0x4e, 0x3c},
+	{0x44, 0x08},
+	{0x48, 0x02},
+
+	/* Crop */
+	{0xfe, 0x01},
+	{0x91, 0x00},
+	{0x92, 0x08},
+	{0x93, 0x00},
+	{0x94, 0x07},
+	{0x95, 0x07},
+	{0x96, 0x98},
+	{0x97, 0x0a},
+	{0x98, 0x20},
+	{0x99, 0x00},
+
+	/* MIPI */
+	{0xfe, 0x03},
+	{0x02, 0x57},
+	{0x03, 0xb7},
+	{0x15, 0x14},
+	{0x18, 0x0f},
+	{0x21, 0x22},
+	{0x22, 0x06},
+	{0x23, 0x48},
+	{0x24, 0x12},
+	{0x25, 0x28},
+	{0x26, 0x08},
+	{0x29, 0x06},
+	{0x2a, 0x58},
+	{0x2b, 0x08},
+	{0xfe, 0x01},
+	{0x8c, 0x10},
+
+	{0xfe, 0x00},
+	{0x3e, 0x01},
+};
+
+/*
+ * Xclk 24Mhz
+ * Pclk 87.6Mhz
+ * grabwindow_width 2592
+ * grabwindow_height 1944
+ * max_framerate 30fps
+ * mipi_datarate per lane 876Mbps
+ */
+static const struct gc5035_regval gc5035_2592x1944_regs[] = {
+	/* System */
+	{0xfe, 0x00},
+	{0x3e, 0x01},
+	{0xfc, 0x01},
+	{0xf4, 0x40},
+	{0xf5, 0xe9},
+	{0xf6, 0x14},
+	{0xf8, 0x49},
+	{0xf9, 0x82},
+	{0xfa, 0x00},
+	{0xfc, 0x81},
+	{0xfe, 0x00},
+	{0x36, 0x01},
+	{0xd3, 0x87},
+	{0x36, 0x00},
+	{0x33, 0x00},
+	{0xfe, 0x03},
+	{0x01, 0xe7},
+	{0xf7, 0x01},
+	{0xfc, 0x8f},
+	{0xfc, 0x8f},
+	{0xfc, 0x8e},
+	{0xfe, 0x00},
+	{0xee, 0x30},
+	{0x87, 0x18},
+	{0xfe, 0x01},
+	{0x8c, 0x90},
+	{0xfe, 0x00},
+
+	/* Analog & CISCTL */
+	{0xfe, 0x00},
+	{0x05, 0x02},
+	{0x06, 0xda},
+	{0x9d, 0x0c},
+	{0x09, 0x00},
+	{0x0a, 0x04},
+	{0x0b, 0x00},
+	{0x0c, 0x03},
+	{0x0d, 0x07},
+	{0x0e, 0xa8},
+	{0x0f, 0x0a},
+	{0x10, 0x30},
+	{0x21, 0x48},
+	{0x29, 0x58},
+	{0x44, 0x20},
+	{0x4e, 0x1a},
+	{0x8c, 0x1a},
+	{0x91, 0x80},
+	{0x92, 0x28},
+	{0x93, 0x20},
+	{0x95, 0xa0},
+	{0x96, 0xe0},
+	{0xd5, 0xfc},
+	{0x97, 0x28},
+	{0x1f, 0x11},
+	{0xce, 0x18},
+	{0xd0, 0xb2},
+	{0xfe, 0x02},
+	{0x14, 0x01},
+	{0x15, 0x02},
+	{0xfe, 0x00},
+	{0xfc, 0x88},
+	{0xfe, 0x10},
+	{0xfe, 0x00},
+	{0xfc, 0x8e},
+	{0xfe, 0x00},
+	{0xfe, 0x00},
+	{0xfe, 0x00},
+	{0xfc, 0x88},
+	{0xfe, 0x10},
+	{0xfe, 0x00},
+	{0xfc, 0x8e},
+
+	/* BLK */
+	{0xfe, 0x01},
+	{0x49, 0x03},
+	{0x4a, 0xff},
+	{0x4b, 0xc0},
+
+	/* Anti_blooming */
+	{0xfe, 0x01},
+	{0x4e, 0x3c},
+	{0x44, 0x08},
+
+	/* Crop */
+	{0xfe, 0x01},
+	{0x91, 0x00},
+	{0x92, 0x08},
+	{0x93, 0x00},
+	{0x94, 0x07},
+	{0x95, 0x07},
+	{0x96, 0x98},
+	{0x97, 0x0a},
+	{0x98, 0x20},
+	{0x99, 0x00},
+
+	/* MIPI */
+	{0xfe, 0x03},
+	{0x02, 0x57},
+	{0x22, 0x06},
+	{0x26, 0x08},
+	{0x29, 0x06},
+	{0x2b, 0x08},
+	{0xfe, 0x01},
+	{0x8c, 0x10},
+
+	{0xfe, 0x00},
+	{0x3e, 0x91},
+};
+
+/*
+ * Xclk 24Mhz
+ * Pclk 87.6Mhz
+ * grabwindow_width 1296
+ * grabwindow_height 972
+ * mipi_datarate per lane 876Mbps
+ */
+static const struct gc5035_regval gc5035_1296x972_regs[] = {
+	/*NULL*/
+	{0xfe, 0x00},
+	{0x3e, 0x01},
+	{0xfc, 0x01},
+	{0xf4, 0x40},
+	{0xf5, 0xe4},
+	{0xf6, 0x14},
+	{0xf8, 0x49},
+	{0xf9, 0x12},
+	{0xfa, 0x01},
+	{0xfc, 0x81},
+	{0xfe, 0x00},
+	{0x36, 0x01},
+	{0xd3, 0x87},
+	{0x36, 0x00},
+	{0x33, 0x20},
+	{0xfe, 0x03},
+	{0x01, 0x87},
+	{0xf7, 0x11},
+	{0xfc, 0x8f},
+	{0xfc, 0x8f},
+	{0xfc, 0x8e},
+	{0xfe, 0x00},
+	{0xee, 0x30},
+	{0x87, 0x18},
+	{0xfe, 0x01},
+	{0x8c, 0x90},
+	{0xfe, 0x00},
+
+	/* Analog & CISCTL */
+	{0xfe, 0x00},
+	{0x05, 0x02},
+	{0x06, 0xda},
+	{0x9d, 0x0c},
+	{0x09, 0x00},
+	{0x0a, 0x04},
+	{0x0b, 0x00},
+	{0x0c, 0x03},
+	{0x0d, 0x07},
+	{0x0e, 0xa8},
+	{0x0f, 0x0a},
+	{0x10, 0x30},
+	{0x21, 0x60},
+	{0x29, 0x30},
+	{0x44, 0x18},
+	{0x4e, 0x20},
+	{0x8c, 0x20},
+	{0x91, 0x15},
+	{0x92, 0x3a},
+	{0x93, 0x20},
+	{0x95, 0x45},
+	{0x96, 0x35},
+	{0xd5, 0xf0},
+	{0x97, 0x20},
+	{0x1f, 0x19},
+	{0xce, 0x18},
+	{0xd0, 0xb3},
+	{0xfe, 0x02},
+	{0x14, 0x02},
+	{0x15, 0x00},
+	{0xfe, 0x00},
+	{0xfc, 0x88},
+	{0xfe, 0x10},
+	{0xfe, 0x00},
+	{0xfc, 0x8e},
+	{0xfe, 0x00},
+	{0xfe, 0x00},
+	{0xfe, 0x00},
+	{0xfc, 0x88},
+	{0xfe, 0x10},
+	{0xfe, 0x00},
+	{0xfc, 0x8e},
+
+	/* BLK */
+	{0xfe, 0x01},
+	{0x49, 0x00},
+	{0x4a, 0x01},
+	{0x4b, 0xf8},
+
+	/* Anti_blooming */
+	{0xfe, 0x01},
+	{0x4e, 0x06},
+	{0x44, 0x02},
+
+	/* Crop */
+	{0xfe, 0x01},
+	{0x91, 0x00},
+	{0x92, 0x04},
+	{0x93, 0x00},
+	{0x94, 0x03},
+	{0x95, 0x03},
+	{0x96, 0xcc},
+	{0x97, 0x05},
+	{0x98, 0x10},
+	{0x99, 0x00},
+
+	/* MIPI */
+	{0xfe, 0x03},
+	{0x02, 0x58},
+	{0x22, 0x03},
+	{0x26, 0x06},
+	{0x29, 0x03},
+	{0x2b, 0x06},
+	{0xfe, 0x01},
+	{0x8c, 0x10},
+};
+
+/*
+ * Xclk 24Mhz
+ * Pclk 87.6Mhz
+ * linelength 672{0x2a0)
+ * framelength 2232{0x8b8)
+ * grabwindow_width 1280
+ * grabwindow_height 720
+ * max_framerate 30fps
+ * mipi_datarate per lane 876Mbps
+ */
+static const struct gc5035_regval gc5035_1280x720_regs[] = {
+	/* System */
+	{0xfe, 0x00},
+	{0x3e, 0x01},
+	{0xfc, 0x01},
+	{0xf4, 0x40},
+	{0xf5, 0xe4},
+	{0xf6, 0x14},
+	{0xf8, 0x49},
+	{0xf9, 0x12},
+	{0xfa, 0x01},
+	{0xfc, 0x81},
+	{0xfe, 0x00},
+	{0x36, 0x01},
+	{0xd3, 0x87},
+	{0x36, 0x00},
+	{0x33, 0x20},
+	{0xfe, 0x03},
+	{0x01, 0x87},
+	{0xf7, 0x11},
+	{0xfc, 0x8f},
+	{0xfc, 0x8f},
+	{0xfc, 0x8e},
+	{0xfe, 0x00},
+	{0xee, 0x30},
+	{0x87, 0x18},
+	{0xfe, 0x01},
+	{0x8c, 0x90},
+	{0xfe, 0x00},
+
+	/* Analog & CISCTL */
+	{0xfe, 0x00},
+	{0x05, 0x02},
+	{0x06, 0xda},
+	{0x9d, 0x0c},
+	{0x09, 0x00},
+	{0x0a, 0x04},
+	{0x0b, 0x00},
+	{0x0c, 0x03},
+	{0x0d, 0x07},
+	{0x0e, 0xa8},
+	{0x0f, 0x0a},
+	{0x10, 0x30},
+	{0x21, 0x60},
+	{0x29, 0x30},
+	{0x44, 0x18},
+	{0x4e, 0x20},
+	{0x8c, 0x20},
+	{0x91, 0x15},
+	{0x92, 0x3a},
+	{0x93, 0x20},
+	{0x95, 0x45},
+	{0x96, 0x35},
+	{0xd5, 0xf0},
+	{0x97, 0x20},
+	{0x1f, 0x19},
+	{0xce, 0x18},
+	{0xd0, 0xb3},
+	{0xfe, 0x02},
+	{0x14, 0x02},
+	{0x15, 0x00},
+	{0xfe, 0x00},
+	{0xfc, 0x88},
+	{0xfe, 0x10},
+	{0xfe, 0x00},
+	{0xfc, 0x8e},
+	{0xfe, 0x00},
+	{0xfe, 0x00},
+	{0xfe, 0x00},
+	{0xfc, 0x88},
+	{0xfe, 0x10},
+	{0xfe, 0x00},
+	{0xfc, 0x8e},
+
+	/* BLK */
+	{0xfe, 0x01},
+	{0x49, 0x00},
+	{0x4a, 0x01},
+	{0x4b, 0xf8},
+
+	/* Anti_blooming */
+	{0xfe, 0x01},
+	{0x4e, 0x06},
+	{0x44, 0x02},
+
+	/* Crop */
+	{0xfe, 0x01},
+	{0x91, 0x00},
+	{0x92, 0x0a},
+	{0x93, 0x00},
+	{0x94, 0x0b},
+	{0x95, 0x02},
+	{0x96, 0xd0},
+	{0x97, 0x05},
+	{0x98, 0x00},
+	{0x99, 0x00},
+
+	/* MIPI */
+	{0xfe, 0x03},
+	{0x02, 0x58},
+	{0x22, 0x03},
+	{0x26, 0x06},
+	{0x29, 0x03},
+	{0x2b, 0x06},
+	{0xfe, 0x01},
+	{0x8c, 0x10},
+	{0xfe, 0x00},
+	{0x3e, 0x91},
+};
+
+static const struct gc5035_mode gc5035_modes[] = {
+	{
+		.width = 2592,
+		.height = 1944,
+		.max_fps = 30,
+		.exp_def = 0x258,
+		.hts_def = 2920,
+		.vts_def = 2008,
+		.reg_list = gc5035_2592x1944_regs,
+		.num_regs = ARRAY_SIZE(gc5035_2592x1944_regs),
+	},
+	{
+		.width = 1296,
+		.height = 972,
+		.max_fps = 30,
+		.exp_def = 0x258,
+		.hts_def = 1460,
+		.vts_def = 2008,
+		.reg_list = gc5035_1296x972_regs,
+		.num_regs = ARRAY_SIZE(gc5035_1296x972_regs),
+	},
+	{
+		.width = 1280,
+		.height = 720,
+		.max_fps = 60,
+		.exp_def = 0x258,
+		.hts_def = 1896,
+		.vts_def = 1536,
+		.reg_list = gc5035_1280x720_regs,
+		.num_regs = ARRAY_SIZE(gc5035_1280x720_regs),
+	},
+};
+
+static const char * const gc5035_test_pattern_menu[] = {
+	"Disabled",
+	"Color Bar",
+};
+
+static const s64 gc5035_link_freqs[] = {
+	438000000,
+};
+
+static u64 gc5035_link_to_pixel_rate(u32 f_index)
+{
+	u64 pixel_rate = gc5035_link_freqs[f_index] * 2 * GC5035_DATA_LANES;
+
+	do_div(pixel_rate, GC5035_BITS_PER_SAMPLE);
+
+	return pixel_rate;
+}
+
+static int gc5035_write_reg(struct gc5035 *gc5035, u8 reg, u8 val)
+{
+	return i2c_smbus_write_byte_data(gc5035->client, reg, val);
+}
+
+static int gc5035_write_array(struct gc5035 *gc5035,
+			      const struct gc5035_regval *regs,
+			      size_t num_regs)
+{
+	unsigned int i;
+	int ret;
+
+	for (i = 0; i < num_regs; i++) {
+		ret = gc5035_write_reg(gc5035, regs[i].addr, regs[i].val);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}
+
+static int gc5035_read_reg(struct gc5035 *gc5035, u8 reg, u8 *val)
+{
+	int ret;
+
+	ret = i2c_smbus_read_byte_data(gc5035->client, reg);
+	if (ret < 0)
+		return ret;
+
+	*val = (unsigned char)ret;
+
+	return 0;
+}
+
+static int gc5035_set_fmt(struct v4l2_subdev *sd,
+			  struct v4l2_subdev_pad_config *cfg,
+			  struct v4l2_subdev_format *fmt)
+{
+	struct gc5035 *gc5035 = to_gc5035(sd);
+	const struct gc5035_mode *mode;
+	s64 h_blank, vblank_def;
+
+	mode = v4l2_find_nearest_size(gc5035_modes,
+				      ARRAY_SIZE(gc5035_modes), width,
+				      height, fmt->format.width,
+				      fmt->format.height);
+
+	fmt->format.code = MEDIA_BUS_FMT_SRGGB10_1X10;
+	fmt->format.width = mode->width;
+	fmt->format.height = mode->height;
+	fmt->format.field = V4L2_FIELD_NONE;
+
+	mutex_lock(&gc5035->mutex);
+	if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
+		*v4l2_subdev_get_try_format(sd, cfg, fmt->pad) = fmt->format;
+	} else {
+		gc5035->cur_mode = mode;
+		h_blank = mode->hts_def - mode->width;
+		__v4l2_ctrl_modify_range(gc5035->hblank, h_blank,
+					 h_blank, 1, h_blank);
+		vblank_def = round_up(mode->vts_def, 4) - mode->height;
+		__v4l2_ctrl_modify_range(gc5035->vblank, vblank_def,
+					 GC5035_VTS_MAX - mode->height,
+					 1, vblank_def);
+	}
+	mutex_unlock(&gc5035->mutex);
+
+	return 0;
+}
+
+static int gc5035_get_fmt(struct v4l2_subdev *sd,
+			  struct v4l2_subdev_pad_config *cfg,
+			  struct v4l2_subdev_format *fmt)
+{
+	struct gc5035 *gc5035 = to_gc5035(sd);
+	const struct gc5035_mode *mode = gc5035->cur_mode;
+
+	mutex_lock(&gc5035->mutex);
+	if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
+		fmt->format = *v4l2_subdev_get_try_format(sd, cfg, fmt->pad);
+	} else {
+		fmt->format.width = mode->width;
+		fmt->format.height = mode->height;
+		fmt->format.code = MEDIA_BUS_FMT_SRGGB10_1X10;
+		fmt->format.field = V4L2_FIELD_NONE;
+	}
+	mutex_unlock(&gc5035->mutex);
+
+	return 0;
+}
+
+static int gc5035_enum_mbus_code(struct v4l2_subdev *sd,
+				 struct v4l2_subdev_pad_config *cfg,
+				 struct v4l2_subdev_mbus_code_enum *code)
+{
+	if (code->index != 0)
+		return -EINVAL;
+
+	code->code = MEDIA_BUS_FMT_SRGGB10_1X10;
+
+	return 0;
+}
+
+static int gc5035_enum_frame_sizes(struct v4l2_subdev *sd,
+				   struct v4l2_subdev_pad_config *cfg,
+				   struct v4l2_subdev_frame_size_enum *fse)
+{
+	if (fse->index >= ARRAY_SIZE(gc5035_modes))
+		return -EINVAL;
+
+	if (fse->code != MEDIA_BUS_FMT_SRGGB10_1X10)
+		return -EINVAL;
+
+	fse->min_width  = gc5035_modes[fse->index].width;
+	fse->max_width  = gc5035_modes[fse->index].width;
+	fse->max_height = gc5035_modes[fse->index].height;
+	fse->min_height = gc5035_modes[fse->index].height;
+
+	return 0;
+}
+
+static int __gc5035_start_stream(struct gc5035 *gc5035)
+{
+	int ret;
+
+	ret = gc5035_write_array(gc5035, gc5035_global_regs,
+				 ARRAY_SIZE(gc5035_global_regs));
+	if (ret)
+		return ret;
+
+	ret = gc5035_write_array(gc5035, gc5035->cur_mode->reg_list,
+				 gc5035->cur_mode->num_regs);
+	if (ret)
+		return ret;
+
+	/* In case these controls are set before streaming */
+	ret = __v4l2_ctrl_handler_setup(&gc5035->ctrl_handler);
+	if (ret)
+		return ret;
+
+	gc5035_write_reg(gc5035, GC5035_PAGE_REG, 0);
+	if (ret)
+		return ret;
+
+	return gc5035_write_reg(gc5035, GC5035_REG_CTRL_MODE,
+				GC5035_MODE_STREAMING);
+}
+
+static int __gc5035_stop_stream(struct gc5035 *gc5035)
+{
+	int ret;
+
+	ret = gc5035_write_reg(gc5035, GC5035_PAGE_REG, 0);
+	if (ret)
+		return ret;
+
+	return gc5035_write_reg(gc5035, GC5035_REG_CTRL_MODE,
+				GC5035_MODE_SW_STANDBY);
+}
+
+static int gc5035_s_stream(struct v4l2_subdev *sd, int on)
+{
+	struct gc5035 *gc5035 = to_gc5035(sd);
+	struct i2c_client *client = gc5035->client;
+	int ret = 0;
+
+	mutex_lock(&gc5035->mutex);
+	on = !!on;
+	if (on == gc5035->streaming)
+		goto unlock_and_return;
+
+	if (on) {
+		ret = pm_runtime_get_sync(&client->dev);
+		if (ret < 0) {
+			pm_runtime_put_noidle(&client->dev);
+			goto unlock_and_return;
+		}
+
+		ret = __gc5035_start_stream(gc5035);
+		if (ret) {
+			dev_err(&client->dev, "start stream failed\n");
+			pm_runtime_put(&client->dev);
+			goto unlock_and_return;
+		}
+	} else {
+		__gc5035_stop_stream(gc5035);
+		pm_runtime_put(&client->dev);
+	}
+
+	gc5035->streaming = on;
+
+unlock_and_return:
+	mutex_unlock(&gc5035->mutex);
+
+	return ret;
+}
+
+static int gc5035_runtime_resume(struct device *dev)
+{
+	struct i2c_client *client = to_i2c_client(dev);
+	struct v4l2_subdev *sd = i2c_get_clientdata(client);
+	struct gc5035 *gc5035 = to_gc5035(sd);
+	unsigned long delay;
+	int ret;
+
+	/* IOVDD must be enabled first. */
+	ret = regulator_enable(gc5035->iovdd_supply);
+	if (ret) {
+		dev_err(dev, "Failed to enable iovdd regulator: %d\n", ret);
+		return ret;
+	}
+
+	/* Wait at least 50 us between IOVDD and AVDD/DVDD. */
+	usleep_range(50, 150);
+
+	ret = regulator_bulk_enable(ARRAY_SIZE(gc5035_supplies),
+				    gc5035->supplies);
+	if (ret) {
+		dev_err(dev, "Failed to enable regulators: %d\n", ret);
+		goto disable_iovdd;
+	}
+
+	gpiod_set_value_cansleep(gc5035->resetb_gpio, 0);
+	gpiod_set_value_cansleep(gc5035->pwdn_gpio, 0);
+
+	ret = clk_prepare_enable(gc5035->mclk);
+	if (ret < 0) {
+		dev_err(dev, "Failed to enable mclk\n");
+		goto enable_pwdn;
+	}
+
+	/* min. 1200 MCLK cycles required before first I2C transaction. */
+	delay = DIV_ROUND_UP(1200UL * USEC_PER_SEC, gc5035->mclk_rate);
+	usleep_range(delay, delay + 200);
+
+	return 0;
+
+enable_pwdn:
+	gpiod_set_value_cansleep(gc5035->pwdn_gpio, 1);
+	gpiod_set_value_cansleep(gc5035->resetb_gpio, 1);
+	regulator_bulk_disable(ARRAY_SIZE(gc5035_supplies), gc5035->supplies);
+disable_iovdd:
+	regulator_disable(gc5035->iovdd_supply);
+
+	return ret;
+}
+
+static int gc5035_runtime_suspend(struct device *dev)
+{
+	struct i2c_client *client = to_i2c_client(dev);
+	struct v4l2_subdev *sd = i2c_get_clientdata(client);
+	struct gc5035 *gc5035 = to_gc5035(sd);
+	unsigned long delay;
+
+	/* min. 2000 MCLK cycles required after streaming stops. */
+	delay = DIV_ROUND_UP(2000UL * USEC_PER_SEC, gc5035->mclk_rate);
+	usleep_range(delay, delay + 200);
+
+	clk_disable_unprepare(gc5035->mclk);
+
+	gpiod_set_value_cansleep(gc5035->pwdn_gpio, 1);
+	gpiod_set_value_cansleep(gc5035->resetb_gpio, 1);
+
+	regulator_bulk_disable(ARRAY_SIZE(gc5035_supplies), gc5035->supplies);
+	regulator_disable(gc5035->iovdd_supply);
+
+	return 0;
+}
+
+static int gc5035_entity_init_cfg(struct v4l2_subdev *subdev,
+				struct v4l2_subdev_pad_config *cfg)
+{
+	struct v4l2_subdev_format fmt = {
+		.which = V4L2_SUBDEV_FORMAT_TRY,
+		.format = {
+			.width = 2592,
+			.height = 1944,
+		}
+	};
+
+	gc5035_set_fmt(subdev, cfg, &fmt);
+
+	return 0;
+}
+
+static const struct dev_pm_ops gc5035_pm_ops = {
+	SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
+				pm_runtime_force_resume)
+	SET_RUNTIME_PM_OPS(gc5035_runtime_suspend,
+			   gc5035_runtime_resume, NULL)
+};
+
+static const struct v4l2_subdev_video_ops gc5035_video_ops = {
+	.s_stream = gc5035_s_stream,
+};
+
+static const struct v4l2_subdev_pad_ops gc5035_pad_ops = {
+	.init_cfg = gc5035_entity_init_cfg,
+	.enum_mbus_code = gc5035_enum_mbus_code,
+	.enum_frame_size = gc5035_enum_frame_sizes,
+	.get_fmt = gc5035_get_fmt,
+	.set_fmt = gc5035_set_fmt,
+};
+
+static const struct v4l2_subdev_ops gc5035_subdev_ops = {
+	.video	= &gc5035_video_ops,
+	.pad	= &gc5035_pad_ops,
+};
+
+static const struct media_entity_operations gc5035_subdev_entity_ops = {
+	.link_validate = v4l2_subdev_link_validate,
+};
+
+static int gc5035_set_exposure(struct gc5035 *gc5035, int val)
+{
+	int ret;
+
+	ret = gc5035_write_reg(gc5035, GC5035_PAGE_REG, 0);
+	if (ret)
+		return ret;
+
+	ret = gc5035_write_reg(gc5035, GC5035_REG_EXPOSURE_H,
+			       (val >> 8) & GC5035_EXPOSURE_H_MASK);
+	if (ret)
+		return ret;
+
+	return gc5035_write_reg(gc5035, GC5035_REG_EXPOSURE_L, val & 0xff);
+}
+
+static int gc5035_set_analogue_gain(struct gc5035 *gc5035, int val)
+{
+	int ret;
+
+	ret = gc5035_write_reg(gc5035, GC5035_PAGE_REG, 0);
+	if (ret)
+		return ret;
+
+	return gc5035_write_reg(gc5035, GC5035_REG_ANALOG_GAIN, val);
+}
+
+static int gc5035_set_digital_gain(struct gc5035 *gc5035, int val)
+{
+	int ret;
+
+	ret = gc5035_write_reg(gc5035, GC5035_PAGE_REG, 0);
+	if (ret)
+		return ret;
+
+	ret = gc5035_write_reg(gc5035, GC5035_REG_DIGI_GAIN_H,
+			       (val >> 8) & GC5035_DGAIN_H_MASK);
+	if (ret)
+		return ret;
+
+	return gc5035_write_reg(gc5035, GC5035_REG_DIGI_GAIN_L,
+				(val << GC5035_DGAIN_L_SHIFT)
+				& GC5035_DGAIN_L_MASK);
+}
+
+static int gc5035_set_vblank(struct gc5035 *gc5035, int val)
+{
+	int frame_length = 0;
+	int ret;
+
+	frame_length = val + gc5035->cur_mode->height;
+
+	ret = gc5035_write_reg(gc5035, GC5035_PAGE_REG, 0);
+	if (ret)
+		return ret;
+
+	ret = gc5035_write_reg(gc5035, GC5035_REG_VTS_H,
+			       (frame_length >> 8) & GC5035_VTS_H_MASK);
+	if (ret)
+		return ret;
+
+	return gc5035_write_reg(gc5035, GC5035_REG_VTS_L, frame_length & 0xff);
+}
+
+static int gc5035_enable_test_pattern(struct gc5035 *gc5035, int pattern)
+{
+	int ret;
+
+	if (pattern)
+		pattern = GC5035_TEST_PATTERN_ENABLE;
+	else
+		pattern = GC5035_TEST_PATTERN_DISABLE;
+
+	ret = gc5035_write_reg(gc5035, GC5035_PAGE_REG, 1);
+	if (ret)
+		return ret;
+
+	ret = gc5035_write_reg(gc5035, GC5035_REG_TEST_PATTERN, pattern);
+	if (ret)
+		return ret;
+
+	return gc5035_write_reg(gc5035, GC5035_PAGE_REG, 0);
+}
+
+static int gc5035_set_ctrl(struct v4l2_ctrl *ctrl)
+{
+	struct gc5035 *gc5035 = container_of(ctrl->handler,
+					     struct gc5035, ctrl_handler);
+	struct i2c_client *client = gc5035->client;
+	s64 max;
+	int ret;
+
+	/* Propagate change of current control to all related controls */
+	switch (ctrl->id) {
+	case V4L2_CID_VBLANK:
+		/* Update max exposure while meeting expected vblanking */
+		max = gc5035->cur_mode->height + ctrl->val
+			- GC5035_EXPOSURE_MARGIN;
+		__v4l2_ctrl_modify_range(gc5035->exposure,
+					 gc5035->exposure->minimum, max,
+					 gc5035->exposure->step,
+					 gc5035->exposure->default_value);
+		break;
+	}
+
+	if (!pm_runtime_get_if_in_use(&client->dev))
+		return 0;
+
+	switch (ctrl->id) {
+	case V4L2_CID_EXPOSURE:
+		ret = gc5035_set_exposure(gc5035, ctrl->val);
+		break;
+	case V4L2_CID_ANALOGUE_GAIN:
+		ret = gc5035_set_analogue_gain(gc5035, ctrl->val);
+		break;
+	case V4L2_CID_DIGITAL_GAIN:
+		ret = gc5035_set_digital_gain(gc5035, ctrl->val);
+		break;
+	case V4L2_CID_VBLANK:
+		ret = gc5035_set_vblank(gc5035, ctrl->val);
+		break;
+	case V4L2_CID_TEST_PATTERN:
+		ret = gc5035_enable_test_pattern(gc5035, ctrl->val);
+		break;
+	default:
+		ret = -EINVAL;
+		break;
+	};
+
+	pm_runtime_put(&client->dev);
+
+	return ret;
+}
+
+static const struct v4l2_ctrl_ops gc5035_ctrl_ops = {
+	.s_ctrl = gc5035_set_ctrl,
+};
+
+static int gc5035_initialize_controls(struct gc5035 *gc5035)
+{
+	const struct gc5035_mode *mode;
+	struct v4l2_ctrl_handler *handler;
+	struct v4l2_ctrl *ctrl;
+	u64 exposure_max, pixel_rate;
+	u32 h_blank, vblank_def;
+	int ret;
+
+	handler = &gc5035->ctrl_handler;
+	mode = gc5035->cur_mode;
+	ret = v4l2_ctrl_handler_init(handler, 8);
+	if (ret)
+		return ret;
+
+	handler->lock = &gc5035->mutex;
+
+	ctrl = v4l2_ctrl_new_int_menu(handler, NULL, V4L2_CID_LINK_FREQ,
+				      0, 0, gc5035_link_freqs);
+	if (ctrl)
+		ctrl->flags |= V4L2_CTRL_FLAG_READ_ONLY;
+
+	pixel_rate = gc5035_link_to_pixel_rate(0);
+	v4l2_ctrl_new_std(handler, NULL, V4L2_CID_PIXEL_RATE,
+			  0, pixel_rate, 1, pixel_rate);
+
+	h_blank = mode->hts_def - mode->width;
+	gc5035->hblank = v4l2_ctrl_new_std(handler, NULL, V4L2_CID_HBLANK,
+					   h_blank, h_blank, 1, h_blank);
+	if (gc5035->hblank)
+		gc5035->hblank->flags |= V4L2_CTRL_FLAG_READ_ONLY;
+
+	vblank_def = round_up(mode->vts_def, 4) - mode->height;
+	gc5035->vblank = v4l2_ctrl_new_std(handler, &gc5035_ctrl_ops,
+					   V4L2_CID_VBLANK, vblank_def,
+					   GC5035_VTS_MAX - mode->height,
+					   4, vblank_def);
+
+	exposure_max = mode->vts_def - GC5035_EXPOSURE_MARGIN;
+	gc5035->exposure = v4l2_ctrl_new_std(handler, &gc5035_ctrl_ops,
+					     V4L2_CID_EXPOSURE,
+					     GC5035_EXPOSURE_MIN, exposure_max,
+					     GC5035_EXPOSURE_STEP,
+					     mode->exp_def);
+
+	v4l2_ctrl_new_std(handler, &gc5035_ctrl_ops, V4L2_CID_ANALOGUE_GAIN,
+			  GC5035_ANALOG_GAIN_MIN, GC5035_ANALOG_GAIN_MAX,
+			  GC5035_ANALOG_GAIN_STEP, GC5035_ANALOG_GAIN_DEFAULT);
+
+	v4l2_ctrl_new_std(handler, &gc5035_ctrl_ops, V4L2_CID_DIGITAL_GAIN,
+			  GC5035_DIGI_GAIN_MIN, GC5035_DIGI_GAIN_MAX,
+			  GC5035_DIGI_GAIN_STEP, GC5035_DIGI_GAIN_DEFAULT);
+
+	v4l2_ctrl_new_std_menu_items(handler, &gc5035_ctrl_ops,
+				     V4L2_CID_TEST_PATTERN,
+				     ARRAY_SIZE(gc5035_test_pattern_menu) - 1,
+				     0, 0, gc5035_test_pattern_menu);
+
+	if (handler->error) {
+		ret = handler->error;
+		dev_err(&gc5035->client->dev,
+			"Failed to init controls(%d)\n", ret);
+		goto err_free_handler;
+	}
+
+	gc5035->subdev.ctrl_handler = handler;
+
+	return 0;
+
+err_free_handler:
+	v4l2_ctrl_handler_free(handler);
+
+	return ret;
+}
+
+static int gc5035_check_sensor_id(struct gc5035 *gc5035,
+				  struct i2c_client *client)
+{
+	struct device *dev = &gc5035->client->dev;
+	u16 id;
+	u8 pid = 0;
+	u8 ver = 0;
+	int ret;
+
+	ret = gc5035_read_reg(gc5035, GC5035_REG_CHIP_ID_H, &pid);
+	if (ret)
+		return ret;
+
+	ret = gc5035_read_reg(gc5035, GC5035_REG_CHIP_ID_L, &ver);
+	if (ret)
+		return ret;
+
+	id = GC5035_ID(pid, ver);
+	if (id != GC5035_CHIP_ID) {
+		dev_err(dev, "Unexpected sensor id(%04x)\n", id);
+		return -EINVAL;
+	}
+
+	dev_dbg(dev, "Detected GC%04x sensor\n", id);
+
+	return 0;
+}
+
+static int gc5035_get_hwcfg(struct gc5035 *gc5035)
+{
+	struct device *dev = &gc5035->client->dev;
+	struct v4l2_fwnode_endpoint bus_cfg = {
+		.bus_type = V4L2_MBUS_CSI2_DPHY
+	};
+	struct fwnode_handle *ep;
+	struct fwnode_handle *fwnode = dev_fwnode(dev);
+	unsigned long link_freq_mask = 0;
+	unsigned int i, j;
+	int ret;
+
+	if (!fwnode)
+		return -ENODEV;
+
+	ep = fwnode_graph_get_next_endpoint(fwnode, NULL);
+	if (!ep)
+		return -ENODEV;
+
+	ret = v4l2_fwnode_endpoint_alloc_parse(ep, &bus_cfg);
+	if (ret)
+		goto out;
+
+	dev_dbg(dev, "num of link freqs: %d", bus_cfg.nr_of_link_frequencies);
+	if (!bus_cfg.nr_of_link_frequencies) {
+		dev_warn(dev, "no link frequencies defined");
+		goto out;
+	}
+
+	for (i = 0; i < ARRAY_SIZE(gc5035_link_freqs); ++i) {
+		for (j = 0; j < bus_cfg.nr_of_link_frequencies; j++) {
+			if (bus_cfg.link_frequencies[j]
+			    == gc5035_link_freqs[i]) {
+				link_freq_mask |= BIT(i);
+				dev_dbg(dev, "Link frequency %lld supported\n",
+					gc5035_link_freqs[i]);
+				break;
+			}
+		}
+	}
+	if (!link_freq_mask) {
+		dev_err(dev, "No supported link frequencies found\n");
+		ret = -EINVAL;
+		goto out;
+	}
+
+out:
+	v4l2_fwnode_endpoint_free(&bus_cfg);
+	fwnode_handle_put(ep);
+	return ret;
+}
+
+static int gc5035_probe(struct i2c_client *client)
+{
+	struct device *dev = &client->dev;
+	struct gc5035 *gc5035;
+	struct v4l2_subdev *sd;
+	int ret, i;
+	u32 freq;
+
+	gc5035 = devm_kzalloc(dev, sizeof(*gc5035), GFP_KERNEL);
+	if (!gc5035)
+		return -ENOMEM;
+
+	gc5035->client = client;
+	gc5035->cur_mode = &gc5035_modes[0];
+
+	gc5035->mclk = devm_clk_get(dev, "mclk");
+	if (IS_ERR(gc5035->mclk))
+		return dev_err_probe(dev, PTR_ERR(gc5035->mclk), "Failed to get mclk\n");
+
+	ret = device_property_read_u32(dev, "clock-frequency", &freq);
+	if (ret < 0)
+		return dev_err_probe(dev, ret, "Failed to get clock-frequency\n");
+	if (freq != GC5035_MCLK_RATE)
+		dev_warn(dev, "Given clock-frequency %u is different from expected %lu\n",
+			 freq, GC5035_MCLK_RATE);
+
+	ret = gc5035_get_hwcfg(gc5035);
+	if (ret < 0)
+		return dev_err_probe(dev, ret, "Failed to get hardware config\n");
+
+	ret = clk_set_rate(gc5035->mclk, freq);
+	if (ret < 0)
+		return dev_err_probe(dev, ret, "Failed to set mclk rate\n");
+	gc5035->mclk_rate = clk_get_rate(gc5035->mclk);
+	if (gc5035->mclk_rate != freq)
+		dev_warn(dev, "mclk rate set to %lu instead of requested %u\n",
+			 gc5035->mclk_rate, freq);
+
+	gc5035->pwdn_gpio = devm_gpiod_get(dev, "pwdn", GPIOD_OUT_HIGH);
+	if (IS_ERR(gc5035->pwdn_gpio))
+		return dev_err_probe(dev, PTR_ERR(gc5035->pwdn_gpio),
+				     "Failed to get pwdn-gpios\n");
+
+	gc5035->resetb_gpio = devm_gpiod_get(dev, "resetb", GPIOD_OUT_HIGH);
+	if (IS_ERR(gc5035->resetb_gpio))
+		return dev_err_probe(dev, PTR_ERR(gc5035->resetb_gpio),
+				     "Failed to get resetb-gpios\n");
+
+	gc5035->iovdd_supply = devm_regulator_get(dev, "iovdd");
+	if (IS_ERR(gc5035->iovdd_supply))
+		return dev_err_probe(dev, PTR_ERR(gc5035->iovdd_supply),
+				     "Failed to get iovdd regulator\n");
+
+	for (i = 0; i < ARRAY_SIZE(gc5035_supplies); i++)
+		gc5035->supplies[i].supply = gc5035_supplies[i];
+	ret = devm_regulator_bulk_get(&gc5035->client->dev,
+				       ARRAY_SIZE(gc5035_supplies),
+				       gc5035->supplies);
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to get regulators\n");
+
+	mutex_init(&gc5035->mutex);
+
+	sd = &gc5035->subdev;
+	v4l2_i2c_subdev_init(sd, client, &gc5035_subdev_ops);
+
+	ret = gc5035_initialize_controls(gc5035);
+	if (ret) {
+		dev_err_probe(dev, ret, "Failed to initialize controls\n");
+		goto err_destroy_mutex;
+	}
+
+	ret = gc5035_runtime_resume(dev);
+	if (ret) {
+		dev_err_probe(dev, ret, "Failed to power on\n");
+		goto err_free_handler;
+	}
+
+	ret = gc5035_check_sensor_id(gc5035, client);
+	if (ret) {
+		dev_err_probe(dev, ret, "Sensor ID check failed\n");
+		goto err_power_off;
+	}
+
+	sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
+	sd->entity.ops = &gc5035_subdev_entity_ops;
+	sd->entity.function = MEDIA_ENT_F_CAM_SENSOR;
+	gc5035->pad.flags = MEDIA_PAD_FL_SOURCE;
+	ret = media_entity_pads_init(&sd->entity, 1, &gc5035->pad);
+	if (ret < 0) {
+		dev_err_probe(dev, ret, "Failed to initialize pads\n");
+		goto err_power_off;
+	}
+
+	ret = v4l2_async_register_subdev_sensor_common(sd);
+	if (ret) {
+		dev_err_probe(dev, ret, "v4l2 async register subdev failed\n");
+		goto err_clean_entity;
+	}
+
+	pm_runtime_set_active(dev);
+	pm_runtime_enable(dev);
+	pm_runtime_idle(dev);
+
+	return 0;
+
+err_clean_entity:
+	media_entity_cleanup(&sd->entity);
+err_power_off:
+	gc5035_runtime_suspend(dev);
+err_free_handler:
+	v4l2_ctrl_handler_free(&gc5035->ctrl_handler);
+err_destroy_mutex:
+	mutex_destroy(&gc5035->mutex);
+
+	return ret;
+}
+
+static int gc5035_remove(struct i2c_client *client)
+{
+	struct v4l2_subdev *sd = i2c_get_clientdata(client);
+	struct gc5035 *gc5035 = to_gc5035(sd);
+
+	v4l2_async_unregister_subdev(sd);
+	media_entity_cleanup(&sd->entity);
+	v4l2_ctrl_handler_free(&gc5035->ctrl_handler);
+	mutex_destroy(&gc5035->mutex);
+	pm_runtime_disable(&client->dev);
+	if (!pm_runtime_status_suspended(&client->dev))
+		gc5035_runtime_suspend(&client->dev);
+	pm_runtime_set_suspended(&client->dev);
+
+	return 0;
+}
+
+static const struct of_device_id gc5035_of_match[] = {
+	{ .compatible = "galaxycore,gc5035" },
+	{},
+};
+MODULE_DEVICE_TABLE(of, gc5035_of_match);
+
+static struct i2c_driver gc5035_i2c_driver = {
+	.driver = {
+		.name = "gc5035",
+		.pm = &gc5035_pm_ops,
+		.of_match_table = gc5035_of_match,
+	},
+	.probe_new	= &gc5035_probe,
+	.remove		= &gc5035_remove,
+};
+module_i2c_driver(gc5035_i2c_driver);
+
+MODULE_AUTHOR("Hao He <hao.he@bitland.com.cn>");
+MODULE_AUTHOR("Xingyu Wu <wuxy@bitland.com.cn>");
+MODULE_AUTHOR("Tomasz Figa <tfiga@chromium.org>");
+MODULE_DESCRIPTION("GalaxyCore gc5035 sensor driver");
+MODULE_LICENSE("GPL v2");
-- 
2.28.0.402.g5ffc5be6b7-goog