[PATCH v3 2/2] media: i2c: add imx415 cmos image sensor driver

[Michael Riesch <michael.riesch@wolfvision.net>]

From: Gerald Loacker <gerald.loacker@wolfvision.net>

Add driver for the Sony IMX415 CMOS image sensor.

Signed-off-by: Gerald Loacker <gerald.loacker@wolfvision.net>
Co-developed-by: Michael Riesch <michael.riesch@wolfvision.net>
Signed-off-by: Michael Riesch <michael.riesch@wolfvision.net>
---
v3:
 - fix copyright year
 - store only required controls
 - make "cur_mode" and "num_data_lanes" unsigned
 - fix array initialization
 - increase number of controls to be reserved to 10
 - refactor code to wake up sensor into a separate method
 - align error code handling
 - add V4L2_SUBDEV_FL_HAS_EVENTS flag
 - use "gpiod_set_value_cansleep" instead of "gpiod_direction_output"
 - simplify logic that checks supported link frequencies/modes

v2:
 - no changes

 MAINTAINERS                |    1 +
 drivers/media/i2c/Kconfig  |   14 +
 drivers/media/i2c/Makefile |    1 +
 drivers/media/i2c/imx415.c | 1300 ++++++++++++++++++++++++++++++++++++
 4 files changed, 1316 insertions(+)
 create mode 100644 drivers/media/i2c/imx415.c

diff --git a/MAINTAINERS b/MAINTAINERS
index c9fa893bf649..803bcfa0d102 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -19499,6 +19499,7 @@ L:	linux-media@vger.kernel.org
 S:	Maintained
 T:	git git://linuxtv.org/media_tree.git
 F:	Documentation/devicetree/bindings/media/i2c/sony,imx415.yaml
+F:	drivers/media/i2c/imx415.c
 
 SONY MEMORYSTICK SUBSYSTEM
 M:	Maxim Levitsky <maximlevitsky@gmail.com>
diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig
index 833241897d63..f7c3d6232c15 100644
--- a/drivers/media/i2c/Kconfig
+++ b/drivers/media/i2c/Kconfig
@@ -228,6 +228,20 @@ config VIDEO_IMX412
 	  To compile this driver as a module, choose M here: the
 	  module will be called imx412.
 
+config VIDEO_IMX415
+	tristate "Sony IMX415 sensor support"
+	depends on OF_GPIO
+	depends on I2C && VIDEO_DEV
+	select VIDEO_V4L2_SUBDEV_API
+	select MEDIA_CONTROLLER
+	select V4L2_FWNODE
+	help
+	  This is a Video4Linux2 sensor driver for the Sony
+	  IMX415 camera.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called imx415.
+
 config VIDEO_MAX9271_LIB
 	tristate
 
diff --git a/drivers/media/i2c/Makefile b/drivers/media/i2c/Makefile
index 4d6c052bb5a7..810c615d7e32 100644
--- a/drivers/media/i2c/Makefile
+++ b/drivers/media/i2c/Makefile
@@ -48,6 +48,7 @@ obj-$(CONFIG_VIDEO_IMX334) += imx334.o
 obj-$(CONFIG_VIDEO_IMX335) += imx335.o
 obj-$(CONFIG_VIDEO_IMX355) += imx355.o
 obj-$(CONFIG_VIDEO_IMX412) += imx412.o
+obj-$(CONFIG_VIDEO_IMX415) += imx415.o
 obj-$(CONFIG_VIDEO_IR_I2C) += ir-kbd-i2c.o
 obj-$(CONFIG_VIDEO_ISL7998X) += isl7998x.o
 obj-$(CONFIG_VIDEO_KS0127) += ks0127.o
diff --git a/drivers/media/i2c/imx415.c b/drivers/media/i2c/imx415.c
new file mode 100644
index 000000000000..d90392df98c7
--- /dev/null
+++ b/drivers/media/i2c/imx415.c
@@ -0,0 +1,1300 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Driver for the Sony IMX415 CMOS Image Sensor.
+ *
+ * Copyright (C) 2023 WolfVision GmbH.
+ */
+
+#include <linux/clk.h>
+#include <linux/gpio/consumer.h>
+#include <linux/i2c.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
+#include <linux/slab.h>
+#include <linux/videodev2.h>
+
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-fwnode.h>
+#include <media/v4l2-subdev.h>
+
+#define IMX415_PIXEL_ARRAY_TOP	  0
+#define IMX415_PIXEL_ARRAY_LEFT	  0
+#define IMX415_PIXEL_ARRAY_WIDTH  3864
+#define IMX415_PIXEL_ARRAY_HEIGHT 2192
+#define IMX415_PIXEL_ARRAY_VBLANK 58
+
+#define IMX415_NUM_CLK_PARAM_REGS 11
+
+#define IMX415_REG_8BIT(n)	  ((1 << 16) | (n))
+#define IMX415_REG_16BIT(n)	  ((2 << 16) | (n))
+#define IMX415_REG_24BIT(n)	  ((3 << 16) | (n))
+#define IMX415_REG_SIZE_SHIFT	  16
+#define IMX415_REG_ADDR_MASK	  0xffff
+
+#define IMX415_MODE		  IMX415_REG_8BIT(0x3000)
+#define IMX415_MODE_OPERATING	  (0)
+#define IMX415_MODE_STANDBY	  BIT(0)
+#define IMX415_REGHOLD		  IMX415_REG_8BIT(0x3001)
+#define IMX415_REGHOLD_INVALID	  (0)
+#define IMX415_REGHOLD_VALID	  BIT(0)
+#define IMX415_XMSTA		  IMX415_REG_8BIT(0x3002)
+#define IMX415_XMSTA_START	  (0)
+#define IMX415_XMSTA_STOP	  BIT(0)
+#define IMX415_BCWAIT_TIME	  IMX415_REG_16BIT(0x3008)
+#define IMX415_CPWAIT_TIME	  IMX415_REG_16BIT(0x300A)
+#define IMX415_WINMODE		  IMX415_REG_8BIT(0x301C)
+#define IMX415_ADDMODE		  IMX415_REG_8BIT(0x3022)
+#define IMX415_REVERSE		  IMX415_REG_8BIT(0x3030)
+#define IMX415_HREVERSE_SHIFT	  (0)
+#define IMX415_VREVERSE_SHIFT	  BIT(0)
+#define IMX415_ADBIT		  IMX415_REG_8BIT(0x3031)
+#define IMX415_MDBIT		  IMX415_REG_8BIT(0x3032)
+#define IMX415_SYS_MODE		  IMX415_REG_8BIT(0x3033)
+#define IMX415_OUTSEL		  IMX415_REG_8BIT(0x30C0)
+#define IMX415_DRV		  IMX415_REG_8BIT(0x30C1)
+#define IMX415_VMAX		  IMX415_REG_24BIT(0x3024)
+#define IMX415_HMAX		  IMX415_REG_16BIT(0x3028)
+#define IMX415_SHR0		  IMX415_REG_24BIT(0x3050)
+#define IMX415_GAIN_PCG_0	  IMX415_REG_16BIT(0x3090)
+#define IMX415_AGAIN_MIN	  0
+#define IMX415_AGAIN_MAX	  100
+#define IMX415_AGAIN_STEP	  1
+#define IMX415_BLKLEVEL		  IMX415_REG_16BIT(0x30E2)
+#define IMX415_BLKLEVEL_DEFAULT	  50
+#define IMX415_TPG_EN_DUOUT	  IMX415_REG_8BIT(0x30E4)
+#define IMX415_TPG_PATSEL_DUOUT	  IMX415_REG_8BIT(0x30E6)
+#define IMX415_TPG_COLORWIDTH	  IMX415_REG_8BIT(0x30E8)
+#define IMX415_TESTCLKEN_MIPI	  IMX415_REG_8BIT(0x3110)
+#define IMX415_INCKSEL1		  IMX415_REG_8BIT(0x3115)
+#define IMX415_INCKSEL2		  IMX415_REG_8BIT(0x3116)
+#define IMX415_INCKSEL3		  IMX415_REG_16BIT(0x3118)
+#define IMX415_INCKSEL4		  IMX415_REG_16BIT(0x311A)
+#define IMX415_INCKSEL5		  IMX415_REG_8BIT(0x311E)
+#define IMX415_DIG_CLP_MODE	  IMX415_REG_8BIT(0x32C8)
+#define IMX415_WRJ_OPEN		  IMX415_REG_8BIT(0x3390)
+#define IMX415_SENSOR_INFO	  IMX415_REG_16BIT(0x3F12)
+#define IMX415_SENSOR_INFO_MASK	  0xFFF
+#define IMX415_CHIP_ID		  0x514
+#define IMX415_LANEMODE		  IMX415_REG_16BIT(0x4001)
+#define IMX415_LANEMODE_2	  1
+#define IMX415_LANEMODE_4	  3
+#define IMX415_TXCLKESC_FREQ	  IMX415_REG_16BIT(0x4004)
+#define IMX415_INCKSEL6		  IMX415_REG_8BIT(0x400C)
+#define IMX415_TCLKPOST		  IMX415_REG_16BIT(0x4018)
+#define IMX415_TCLKPREPARE	  IMX415_REG_16BIT(0x401A)
+#define IMX415_TCLKTRAIL	  IMX415_REG_16BIT(0x401C)
+#define IMX415_TCLKZERO		  IMX415_REG_16BIT(0x401E)
+#define IMX415_THSPREPARE	  IMX415_REG_16BIT(0x4020)
+#define IMX415_THSZERO		  IMX415_REG_16BIT(0x4022)
+#define IMX415_THSTRAIL		  IMX415_REG_16BIT(0x4024)
+#define IMX415_THSEXIT		  IMX415_REG_16BIT(0x4026)
+#define IMX415_TLPX		  IMX415_REG_16BIT(0x4028)
+#define IMX415_INCKSEL7		  IMX415_REG_8BIT(0x4074)
+
+struct imx415_reg {
+	u32 address;
+	u32 val;
+};
+
+static const char *const imx415_supply_names[] = {
+	"dvdd",
+	"ovdd",
+	"avdd",
+};
+
+/*
+ * The IMX415 data sheet uses lane rates but v4l2 uses link frequency to
+ * describe MIPI CSI-2 speed. This driver uses lane rates wherever possible
+ * and converts them to link frequencies by a factor of two when needed.
+ */
+static const s64 link_freq_menu_items[] = {
+	594000000 / 2,	720000000 / 2,	891000000 / 2,
+	1440000000 / 2, 1485000000 / 2,
+};
+
+struct imx415_clk_params {
+	u64 lane_rate;
+	u64 inck;
+	struct imx415_reg regs[IMX415_NUM_CLK_PARAM_REGS];
+};
+
+/* INCK Settings - includes all lane rate and INCK dependent registers */
+static const struct imx415_clk_params imx415_clk_params[] = {
+	{
+		.lane_rate = 594000000,
+		.inck = 27000000,
+		.regs[0] = { IMX415_BCWAIT_TIME, 0x05D },
+		.regs[1] = { IMX415_CPWAIT_TIME, 0x042 },
+		.regs[2] = { IMX415_SYS_MODE, 0x7 },
+		.regs[3] = { IMX415_INCKSEL1, 0x00 },
+		.regs[4] = { IMX415_INCKSEL2, 0x23 },
+		.regs[5] = { IMX415_INCKSEL3, 0x084 },
+		.regs[6] = { IMX415_INCKSEL4, 0x0E7 },
+		.regs[7] = { IMX415_INCKSEL5, 0x23 },
+		.regs[8] = { IMX415_INCKSEL6, 0x0 },
+		.regs[9] = { IMX415_INCKSEL7, 0x1 },
+		.regs[10] = { IMX415_TXCLKESC_FREQ, 0x06C0 },
+	},
+	{
+		.lane_rate = 720000000,
+		.inck = 24000000,
+		.regs[0] = { IMX415_BCWAIT_TIME, 0x054 },
+		.regs[1] = { IMX415_CPWAIT_TIME, 0x03B },
+		.regs[2] = { IMX415_SYS_MODE, 0x9 },
+		.regs[3] = { IMX415_INCKSEL1, 0x00 },
+		.regs[4] = { IMX415_INCKSEL2, 0x23 },
+		.regs[5] = { IMX415_INCKSEL3, 0x0B4 },
+		.regs[6] = { IMX415_INCKSEL4, 0x0FC },
+		.regs[7] = { IMX415_INCKSEL5, 0x23 },
+		.regs[8] = { IMX415_INCKSEL6, 0x0 },
+		.regs[9] = { IMX415_INCKSEL7, 0x1 },
+		.regs[10] = { IMX415_TXCLKESC_FREQ, 0x0600 },
+	},
+	{
+		.lane_rate = 891000000,
+		.inck = 27000000,
+		.regs[0] = { IMX415_BCWAIT_TIME, 0x05D },
+		.regs[1] = { IMX415_CPWAIT_TIME, 0x042 },
+		.regs[2] = { IMX415_SYS_MODE, 0x5 },
+		.regs[3] = { IMX415_INCKSEL1, 0x00 },
+		.regs[4] = { IMX415_INCKSEL2, 0x23 },
+		.regs[5] = { IMX415_INCKSEL3, 0x0C6 },
+		.regs[6] = { IMX415_INCKSEL4, 0x0E7 },
+		.regs[7] = { IMX415_INCKSEL5, 0x23 },
+		.regs[8] = { IMX415_INCKSEL6, 0x0 },
+		.regs[9] = { IMX415_INCKSEL7, 0x1 },
+		.regs[10] = { IMX415_TXCLKESC_FREQ, 0x06C0 },
+	},
+	{
+		.lane_rate = 1440000000,
+		.inck = 24000000,
+		.regs[0] = { IMX415_BCWAIT_TIME, 0x054 },
+		.regs[1] = { IMX415_CPWAIT_TIME, 0x03B },
+		.regs[2] = { IMX415_SYS_MODE, 0x8 },
+		.regs[3] = { IMX415_INCKSEL1, 0x00 },
+		.regs[4] = { IMX415_INCKSEL2, 0x23 },
+		.regs[5] = { IMX415_INCKSEL3, 0x0B4 },
+		.regs[6] = { IMX415_INCKSEL4, 0x0FC },
+		.regs[7] = { IMX415_INCKSEL5, 0x23 },
+		.regs[8] = { IMX415_INCKSEL6, 0x1 },
+		.regs[9] = { IMX415_INCKSEL7, 0x0 },
+		.regs[10] = { IMX415_TXCLKESC_FREQ, 0x0600 },
+	},
+	{
+		.lane_rate = 1485000000,
+		.inck = 27000000,
+		.regs[0] = { IMX415_BCWAIT_TIME, 0x05D },
+		.regs[1] = { IMX415_CPWAIT_TIME, 0x042 },
+		.regs[2] = { IMX415_SYS_MODE, 0x8 },
+		.regs[3] = { IMX415_INCKSEL1, 0x00 },
+		.regs[4] = { IMX415_INCKSEL2, 0x23 },
+		.regs[5] = { IMX415_INCKSEL3, 0x0A5 },
+		.regs[6] = { IMX415_INCKSEL4, 0x0E7 },
+		.regs[7] = { IMX415_INCKSEL5, 0x23 },
+		.regs[8] = { IMX415_INCKSEL6, 0x1 },
+		.regs[9] = { IMX415_INCKSEL7, 0x0 },
+		.regs[10] = { IMX415_TXCLKESC_FREQ, 0x06C0 },
+	},
+};
+
+/* all-pixel 2-lane 720 Mbps 15.74 Hz mode */
+static const struct imx415_reg imx415_mode_2_720[] = {
+	{ IMX415_VMAX, 0x08CA },
+	{ IMX415_HMAX, 0x07F0 },
+	{ IMX415_LANEMODE, IMX415_LANEMODE_2 },
+	{ IMX415_TCLKPOST, 0x006F },
+	{ IMX415_TCLKPREPARE, 0x002F },
+	{ IMX415_TCLKTRAIL, 0x002F },
+	{ IMX415_TCLKZERO, 0x00BF },
+	{ IMX415_THSPREPARE, 0x002F },
+	{ IMX415_THSZERO, 0x0057 },
+	{ IMX415_THSTRAIL, 0x002F },
+	{ IMX415_THSEXIT, 0x004F },
+	{ IMX415_TLPX, 0x0027 },
+};
+
+/* all-pixel 2-lane 1440 Mbps 30.01 Hz mode */
+static const struct imx415_reg imx415_mode_2_1440[] = {
+	{ IMX415_VMAX, 0x08CA },
+	{ IMX415_HMAX, 0x042A },
+	{ IMX415_LANEMODE, IMX415_LANEMODE_2 },
+	{ IMX415_TCLKPOST, 0x009F },
+	{ IMX415_TCLKPREPARE, 0x0057 },
+	{ IMX415_TCLKTRAIL, 0x0057 },
+	{ IMX415_TCLKZERO, 0x0187 },
+	{ IMX415_THSPREPARE, 0x005F },
+	{ IMX415_THSZERO, 0x00A7 },
+	{ IMX415_THSTRAIL, 0x005F },
+	{ IMX415_THSEXIT, 0x0097 },
+	{ IMX415_TLPX, 0x004F },
+};
+
+/* all-pixel 4-lane 891 Mbps 30 Hz mode */
+static const struct imx415_reg imx415_mode_4_891[] = {
+	{ IMX415_VMAX, 0x08CA },
+	{ IMX415_HMAX, 0x044C },
+	{ IMX415_LANEMODE, IMX415_LANEMODE_4 },
+	{ IMX415_TCLKPOST, 0x007F },
+	{ IMX415_TCLKPREPARE, 0x0037 },
+	{ IMX415_TCLKTRAIL, 0x0037 },
+	{ IMX415_TCLKZERO, 0x00F7 },
+	{ IMX415_THSPREPARE, 0x003F },
+	{ IMX415_THSZERO, 0x006F },
+	{ IMX415_THSTRAIL, 0x003F },
+	{ IMX415_THSEXIT, 0x005F },
+	{ IMX415_TLPX, 0x002F },
+};
+
+struct imx415_mode_reg_list {
+	u32 num_of_regs;
+	const struct imx415_reg *regs;
+};
+
+/*
+ * Mode : number of lanes, lane rate and frame rate dependent settings
+ *
+ * pixel_rate and hmax_pix are needed to calculate hblank for the v4l2 ctrl
+ * interface. These values can not be found in the data sheet and should be
+ * treated as virtual values. Use following table when adding new modes.
+ *
+ * lane_rate  lanes    fps     hmax_pix   pixel_rate
+ *
+ *     594      2     10.000     4400       99000000
+ *     891      2     15.000     4400      148500000
+ *     720      2     15.748     4064      144000000
+ *    1782      2     30.000     4400      297000000
+ *    2079      2     30.000     4400      297000000
+ *    1440      2     30.019     4510      304615385
+ *
+ *     594      4     20.000     5500      247500000
+ *     594      4     25.000     4400      247500000
+ *     720      4     25.000     4400      247500000
+ *     720      4     30.019     4510      304615385
+ *     891      4     30.000     4400      297000000
+ *    1440      4     30.019     4510      304615385
+ *    1440      4     60.038     4510      609230769
+ *    1485      4     60.000     4400      594000000
+ *    1782      4     60.000     4400      594000000
+ *    2079      4     60.000     4400      594000000
+ *    2376      4     90.164     4392      891000000
+ */
+struct imx415_mode {
+	u64 lane_rate;
+	u32 lanes;
+	u32 hmax_pix;
+	u64 pixel_rate;
+	struct imx415_mode_reg_list reg_list;
+};
+
+/* mode configs */
+static const struct imx415_mode supported_modes[] = {
+	{
+		.lane_rate = 720000000,
+		.lanes = 2,
+		.hmax_pix = 4064,
+		.pixel_rate = 144000000,
+		.reg_list = {
+			.num_of_regs = ARRAY_SIZE(imx415_mode_2_720),
+			.regs = imx415_mode_2_720,
+		},
+	},
+	{
+		.lane_rate = 1440000000,
+		.lanes = 2,
+		.hmax_pix = 4510,
+		.pixel_rate = 304615385,
+		.reg_list = {
+			.num_of_regs = ARRAY_SIZE(imx415_mode_2_1440),
+			.regs = imx415_mode_2_1440,
+		},
+	},
+	{
+		.lane_rate = 891000000,
+		.lanes = 4,
+		.hmax_pix = 4400,
+		.pixel_rate = 297000000,
+		.reg_list = {
+			.num_of_regs = ARRAY_SIZE(imx415_mode_4_891),
+			.regs = imx415_mode_4_891,
+		},
+	},
+};
+
+static const struct regmap_config imx415_regmap_config = {
+	.reg_bits = 16,
+	.val_bits = 8,
+};
+
+static const char *const imx415_test_pattern_menu[] = {
+	"disabled",
+	"solid black",
+	"solid white",
+	"solid dark gray",
+	"solid light gray",
+	"stripes light/dark grey",
+	"stripes dark/light grey",
+	"stripes black/dark grey",
+	"stripes dark grey/black",
+	"stripes black/white",
+	"stripes white/black",
+	"horizontal color bar",
+	"vertical color bar",
+};
+
+struct imx415 {
+	struct device *dev;
+	struct clk *clk;
+	struct regulator_bulk_data supplies[ARRAY_SIZE(imx415_supply_names)];
+	struct gpio_desc *reset;
+	struct regmap *regmap;
+
+	const struct imx415_clk_params *clk_params;
+
+	bool streaming;
+
+	struct v4l2_subdev subdev;
+	struct media_pad pad;
+
+	struct v4l2_ctrl_handler ctrls;
+	struct v4l2_ctrl *vblank;
+	struct v4l2_ctrl *hflip;
+	struct v4l2_ctrl *vflip;
+
+	unsigned int cur_mode;
+	unsigned int num_data_lanes;
+};
+
+/*
+ * This table includes fixed register settings and a bunch of undocumented
+ * registers that have to be set to another value than default.
+ */
+static const struct imx415_reg imx415_init_table[] = {
+	/* use all-pixel readout mode, no flip */
+	{ IMX415_WINMODE, 0x00 },
+	{ IMX415_ADDMODE, 0x00 },
+	{ IMX415_REVERSE, 0x00 },
+	/* use RAW 10-bit mode */
+	{ IMX415_ADBIT, 0x00 },
+	{ IMX415_MDBIT, 0x00 },
+	/* output VSYNC on XVS and low on XHS */
+	{ IMX415_OUTSEL, 0x22 },
+	{ IMX415_DRV, 0x00 },
+
+	/* SONY magic registers */
+	{ IMX415_REG_8BIT(0x32D4), 0x21 },
+	{ IMX415_REG_8BIT(0x32EC), 0xA1 },
+	{ IMX415_REG_8BIT(0x3452), 0x7F },
+	{ IMX415_REG_8BIT(0x3453), 0x03 },
+	{ IMX415_REG_8BIT(0x358A), 0x04 },
+	{ IMX415_REG_8BIT(0x35A1), 0x02 },
+	{ IMX415_REG_8BIT(0x36BC), 0x0C },
+	{ IMX415_REG_8BIT(0x36CC), 0x53 },
+	{ IMX415_REG_8BIT(0x36CD), 0x00 },
+	{ IMX415_REG_8BIT(0x36CE), 0x3C },
+	{ IMX415_REG_8BIT(0x36D0), 0x8C },
+	{ IMX415_REG_8BIT(0x36D1), 0x00 },
+	{ IMX415_REG_8BIT(0x36D2), 0x71 },
+	{ IMX415_REG_8BIT(0x36D4), 0x3C },
+	{ IMX415_REG_8BIT(0x36D6), 0x53 },
+	{ IMX415_REG_8BIT(0x36D7), 0x00 },
+	{ IMX415_REG_8BIT(0x36D8), 0x71 },
+	{ IMX415_REG_8BIT(0x36DA), 0x8C },
+	{ IMX415_REG_8BIT(0x36DB), 0x00 },
+	{ IMX415_REG_8BIT(0x3724), 0x02 },
+	{ IMX415_REG_8BIT(0x3726), 0x02 },
+	{ IMX415_REG_8BIT(0x3732), 0x02 },
+	{ IMX415_REG_8BIT(0x3734), 0x03 },
+	{ IMX415_REG_8BIT(0x3736), 0x03 },
+	{ IMX415_REG_8BIT(0x3742), 0x03 },
+	{ IMX415_REG_8BIT(0x3862), 0xE0 },
+	{ IMX415_REG_8BIT(0x38CC), 0x30 },
+	{ IMX415_REG_8BIT(0x38CD), 0x2F },
+	{ IMX415_REG_8BIT(0x395C), 0x0C },
+	{ IMX415_REG_8BIT(0x3A42), 0xD1 },
+	{ IMX415_REG_8BIT(0x3A4C), 0x77 },
+	{ IMX415_REG_8BIT(0x3AE0), 0x02 },
+	{ IMX415_REG_8BIT(0x3AEC), 0x0C },
+	{ IMX415_REG_8BIT(0x3B00), 0x2E },
+	{ IMX415_REG_8BIT(0x3B06), 0x29 },
+	{ IMX415_REG_8BIT(0x3B98), 0x25 },
+	{ IMX415_REG_8BIT(0x3B99), 0x21 },
+	{ IMX415_REG_8BIT(0x3B9B), 0x13 },
+	{ IMX415_REG_8BIT(0x3B9C), 0x13 },
+	{ IMX415_REG_8BIT(0x3B9D), 0x13 },
+	{ IMX415_REG_8BIT(0x3B9E), 0x13 },
+	{ IMX415_REG_8BIT(0x3BA1), 0x00 },
+	{ IMX415_REG_8BIT(0x3BA2), 0x06 },
+	{ IMX415_REG_8BIT(0x3BA3), 0x0B },
+	{ IMX415_REG_8BIT(0x3BA4), 0x10 },
+	{ IMX415_REG_8BIT(0x3BA5), 0x14 },
+	{ IMX415_REG_8BIT(0x3BA6), 0x18 },
+	{ IMX415_REG_8BIT(0x3BA7), 0x1A },
+	{ IMX415_REG_8BIT(0x3BA8), 0x1A },
+	{ IMX415_REG_8BIT(0x3BA9), 0x1A },
+	{ IMX415_REG_8BIT(0x3BAC), 0xED },
+	{ IMX415_REG_8BIT(0x3BAD), 0x01 },
+	{ IMX415_REG_8BIT(0x3BAE), 0xF6 },
+	{ IMX415_REG_8BIT(0x3BAF), 0x02 },
+	{ IMX415_REG_8BIT(0x3BB0), 0xA2 },
+	{ IMX415_REG_8BIT(0x3BB1), 0x03 },
+	{ IMX415_REG_8BIT(0x3BB2), 0xE0 },
+	{ IMX415_REG_8BIT(0x3BB3), 0x03 },
+	{ IMX415_REG_8BIT(0x3BB4), 0xE0 },
+	{ IMX415_REG_8BIT(0x3BB5), 0x03 },
+	{ IMX415_REG_8BIT(0x3BB6), 0xE0 },
+	{ IMX415_REG_8BIT(0x3BB7), 0x03 },
+	{ IMX415_REG_8BIT(0x3BB8), 0xE0 },
+	{ IMX415_REG_8BIT(0x3BBA), 0xE0 },
+	{ IMX415_REG_8BIT(0x3BBC), 0xDA },
+	{ IMX415_REG_8BIT(0x3BBE), 0x88 },
+	{ IMX415_REG_8BIT(0x3BC0), 0x44 },
+	{ IMX415_REG_8BIT(0x3BC2), 0x7B },
+	{ IMX415_REG_8BIT(0x3BC4), 0xA2 },
+	{ IMX415_REG_8BIT(0x3BC8), 0xBD },
+	{ IMX415_REG_8BIT(0x3BCA), 0xBD },
+};
+
+static inline struct imx415 *to_imx415(struct v4l2_subdev *sd)
+{
+	return container_of(sd, struct imx415, subdev);
+}
+
+static int imx415_read(struct imx415 *sensor, u32 addr)
+{
+	u8 data[3] = { 0 };
+	int ret;
+
+	ret = regmap_raw_read(sensor->regmap, addr & IMX415_REG_ADDR_MASK, data,
+			      (addr >> IMX415_REG_SIZE_SHIFT) & 3);
+	if (ret < 0)
+		return ret;
+
+	return (data[2] << 16) | (data[1] << 8) | data[0];
+}
+
+static int imx415_write(struct imx415 *sensor, u32 addr, u32 value)
+{
+	u8 data[3] = { value & 0xff, (value >> 8) & 0xff, value >> 16 };
+	int ret;
+
+	ret = regmap_raw_write(sensor->regmap, addr & IMX415_REG_ADDR_MASK,
+			       data, (addr >> IMX415_REG_SIZE_SHIFT) & 3);
+	if (ret < 0)
+		dev_err_ratelimited(sensor->dev,
+				    "%u-bit write to 0x%04x failed: %d\n",
+				    ((addr >> IMX415_REG_SIZE_SHIFT) & 3) * 8,
+				    addr & IMX415_REG_ADDR_MASK, ret);
+
+	return 0;
+}
+
+static int imx415_set_testpattern(struct imx415 *sensor, int val)
+{
+	int ret;
+
+	if (val) {
+		ret = imx415_write(sensor, IMX415_BLKLEVEL, 0x00);
+		if (ret)
+			return ret;
+		ret = imx415_write(sensor, IMX415_TPG_EN_DUOUT, 0x01);
+		if (ret)
+			return ret;
+		ret = imx415_write(sensor, IMX415_TPG_PATSEL_DUOUT, val - 1);
+		if (ret)
+			return ret;
+		ret = imx415_write(sensor, IMX415_TPG_COLORWIDTH, 0x01);
+		if (ret)
+			return ret;
+		ret = imx415_write(sensor, IMX415_TESTCLKEN_MIPI, 0x20);
+		if (ret)
+			return ret;
+		ret = imx415_write(sensor, IMX415_DIG_CLP_MODE, 0x00);
+		if (ret)
+			return ret;
+		ret = imx415_write(sensor, IMX415_WRJ_OPEN, 0x00);
+	} else {
+		ret = imx415_write(sensor, IMX415_BLKLEVEL,
+				   IMX415_BLKLEVEL_DEFAULT);
+		if (ret)
+			return ret;
+		ret = imx415_write(sensor, IMX415_TPG_EN_DUOUT, 0x00);
+		if (ret)
+			return ret;
+		ret = imx415_write(sensor, IMX415_TESTCLKEN_MIPI, 0x00);
+		if (ret)
+			return ret;
+		ret = imx415_write(sensor, IMX415_DIG_CLP_MODE, 0x01);
+		if (ret)
+			return ret;
+		ret = imx415_write(sensor, IMX415_WRJ_OPEN, 0x01);
+	}
+	return 0;
+}
+
+static int imx415_s_ctrl(struct v4l2_ctrl *ctrl)
+{
+	struct imx415 *sensor = container_of(ctrl->handler, struct imx415,
+					     ctrls);
+	const struct v4l2_mbus_framefmt *format;
+	struct v4l2_subdev_state *state;
+	unsigned int vmax;
+	unsigned int flip;
+
+	if (!sensor->streaming)
+		return 0;
+
+	state = v4l2_subdev_get_locked_active_state(&sensor->subdev);
+	format = v4l2_subdev_get_pad_format(&sensor->subdev, state, 0);
+
+	switch (ctrl->id) {
+	case V4L2_CID_EXPOSURE:
+		/* clamp the exposure value to VMAX. */
+		vmax = format->height + sensor->vblank->cur.val;
+		ctrl->val = min_t(int, ctrl->val, vmax);
+		return imx415_write(sensor, IMX415_SHR0, vmax - ctrl->val);
+
+	case V4L2_CID_ANALOGUE_GAIN:
+		/* analogue gain in 0.3 dB step size */
+		return imx415_write(sensor, IMX415_GAIN_PCG_0, ctrl->val);
+
+	case V4L2_CID_HFLIP:
+	case V4L2_CID_VFLIP:
+		flip = (sensor->hflip->val << IMX415_HREVERSE_SHIFT) |
+		       (sensor->vflip->val << IMX415_VREVERSE_SHIFT);
+		return imx415_write(sensor, IMX415_REVERSE, flip);
+
+	case V4L2_CID_TEST_PATTERN:
+		return imx415_set_testpattern(sensor, ctrl->val);
+
+	default:
+		return -EINVAL;
+	}
+}
+
+static const struct v4l2_ctrl_ops imx415_ctrl_ops = {
+	.s_ctrl = imx415_s_ctrl,
+};
+
+static int imx415_ctrls_init(struct imx415 *sensor)
+{
+	struct v4l2_fwnode_device_properties props;
+	struct v4l2_ctrl *ctrl;
+	u64 pixel_rate = supported_modes[sensor->cur_mode].pixel_rate;
+	u64 lane_rate = supported_modes[sensor->cur_mode].lane_rate;
+	u32 exposure_max = IMX415_PIXEL_ARRAY_HEIGHT +
+			   IMX415_PIXEL_ARRAY_VBLANK - 8;
+	u32 hblank;
+	unsigned int i;
+	int ret;
+
+	ret = v4l2_fwnode_device_parse(sensor->dev, &props);
+	if (ret < 0)
+		return ret;
+
+	v4l2_ctrl_handler_init(&sensor->ctrls, 10);
+
+	for (i = 0; i < ARRAY_SIZE(link_freq_menu_items); ++i) {
+		if (lane_rate == link_freq_menu_items[i] * 2)
+			break;
+	}
+	if (i == ARRAY_SIZE(link_freq_menu_items)) {
+		return dev_err_probe(sensor->dev, -EINVAL,
+				     "lane rate %llu not supported\n",
+				     lane_rate);
+	}
+
+	ctrl = v4l2_ctrl_new_int_menu(&sensor->ctrls, &imx415_ctrl_ops,
+				      V4L2_CID_LINK_FREQ,
+				      ARRAY_SIZE(link_freq_menu_items) - 1, i,
+				      link_freq_menu_items);
+
+	if (ctrl)
+		ctrl->flags |= V4L2_CTRL_FLAG_READ_ONLY;
+
+	v4l2_ctrl_new_std(&sensor->ctrls, &imx415_ctrl_ops, V4L2_CID_EXPOSURE,
+			  4, exposure_max, 1, exposure_max);
+
+	v4l2_ctrl_new_std(&sensor->ctrls, &imx415_ctrl_ops,
+			  V4L2_CID_ANALOGUE_GAIN, IMX415_AGAIN_MIN,
+			  IMX415_AGAIN_MAX, IMX415_AGAIN_STEP,
+			  IMX415_AGAIN_MIN);
+
+	hblank = supported_modes[sensor->cur_mode].hmax_pix -
+		 IMX415_PIXEL_ARRAY_WIDTH;
+	ctrl = v4l2_ctrl_new_std(&sensor->ctrls, &imx415_ctrl_ops,
+				 V4L2_CID_HBLANK, hblank, hblank, 1, hblank);
+	if (ctrl)
+		ctrl->flags |= V4L2_CTRL_FLAG_READ_ONLY;
+
+	sensor->vblank = v4l2_ctrl_new_std(&sensor->ctrls, &imx415_ctrl_ops,
+					   V4L2_CID_VBLANK,
+					   IMX415_PIXEL_ARRAY_VBLANK,
+					   IMX415_PIXEL_ARRAY_VBLANK, 1,
+					   IMX415_PIXEL_ARRAY_VBLANK);
+	if (sensor->vblank)
+		sensor->vblank->flags |= V4L2_CTRL_FLAG_READ_ONLY;
+
+	/*
+	 * The pixel rate used here is a virtual value and can be used for
+	 * calculating the frame rate together with hblank. It may not
+	 * necessarily be the physically correct pixel clock.
+	 */
+	v4l2_ctrl_new_std(&sensor->ctrls, NULL, V4L2_CID_PIXEL_RATE, pixel_rate,
+			  pixel_rate, 1, pixel_rate);
+
+	sensor->hflip = v4l2_ctrl_new_std(&sensor->ctrls, &imx415_ctrl_ops,
+					  V4L2_CID_HFLIP, 0, 1, 1, 0);
+	sensor->vflip = v4l2_ctrl_new_std(&sensor->ctrls, &imx415_ctrl_ops,
+					  V4L2_CID_VFLIP, 0, 1, 1, 0);
+
+	v4l2_ctrl_new_std_menu_items(&sensor->ctrls, &imx415_ctrl_ops,
+				     V4L2_CID_TEST_PATTERN,
+				     ARRAY_SIZE(imx415_test_pattern_menu) - 1,
+				     0, 0, imx415_test_pattern_menu);
+
+	v4l2_ctrl_new_fwnode_properties(&sensor->ctrls, &imx415_ctrl_ops,
+					&props);
+
+	if (sensor->ctrls.error) {
+		dev_err_probe(sensor->dev, sensor->ctrls.error,
+			      "failed to add controls\n");
+		v4l2_ctrl_handler_free(&sensor->ctrls);
+		return sensor->ctrls.error;
+	}
+	sensor->subdev.ctrl_handler = &sensor->ctrls;
+
+	return 0;
+}
+
+static int imx415_set_mode(struct imx415 *sensor, int mode)
+{
+	const struct imx415_reg *reg;
+	unsigned int i;
+	int ret = 0;
+
+	if (mode >= ARRAY_SIZE(supported_modes)) {
+		dev_err(sensor->dev, "Mode %d not supported\n", mode);
+		return -EINVAL;
+	}
+
+	for (i = 0; i < supported_modes[mode].reg_list.num_of_regs; ++i) {
+		reg = &supported_modes[mode].reg_list.regs[i];
+		ret = imx415_write(sensor, reg->address, reg->val);
+		if (ret)
+			return ret;
+	}
+
+	for (i = 0; i < IMX415_NUM_CLK_PARAM_REGS; ++i) {
+		reg = &sensor->clk_params->regs[i];
+		ret = imx415_write(sensor, reg->address, reg->val);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}
+
+static int imx415_setup(struct imx415 *sensor, struct v4l2_subdev_state *state)
+{
+	unsigned int i;
+	int ret;
+
+	for (i = 0; i < ARRAY_SIZE(imx415_init_table); ++i) {
+		ret = imx415_write(sensor, imx415_init_table[i].address,
+				   imx415_init_table[i].val);
+		if (ret)
+			return ret;
+	}
+
+	return imx415_set_mode(sensor, sensor->cur_mode);
+}
+
+static int imx415_wakeup(struct imx415 *sensor)
+{
+	int ret;
+
+	ret = imx415_write(sensor, IMX415_MODE, IMX415_MODE_OPERATING);
+	if (ret)
+		return ret;
+
+	/*
+	 * According to the datasheet we have to wait at least 63 us after
+	 * leaving standby mode. But this doesn't work even after 30 ms.
+	 * So probably this should be 63 ms and therefore we wait for 80 ms.
+	 */
+	msleep(80);
+
+	return 0;
+}
+
+static int imx415_stream_on(struct imx415 *sensor)
+{
+	int ret;
+
+	ret = imx415_wakeup(sensor);
+	if (ret)
+		return ret;
+
+	return imx415_write(sensor, IMX415_XMSTA, IMX415_XMSTA_START);
+}
+
+static int imx415_stream_off(struct imx415 *sensor)
+{
+	int ret;
+
+	ret = imx415_write(sensor, IMX415_XMSTA, IMX415_XMSTA_STOP);
+	if (ret)
+		return ret;
+
+	return imx415_write(sensor, IMX415_MODE, IMX415_MODE_STANDBY);
+}
+
+static int imx415_s_stream(struct v4l2_subdev *sd, int enable)
+{
+	struct imx415 *sensor = to_imx415(sd);
+	struct v4l2_subdev_state *state;
+	int ret;
+
+	state = v4l2_subdev_lock_and_get_active_state(sd);
+
+	if (!enable) {
+		ret = imx415_stream_off(sensor);
+
+		pm_runtime_mark_last_busy(sensor->dev);
+		pm_runtime_put_autosuspend(sensor->dev);
+
+		sensor->streaming = false;
+
+		goto unlock;
+	}
+
+	ret = pm_runtime_resume_and_get(sensor->dev);
+	if (ret < 0)
+		goto unlock;
+
+	ret = imx415_setup(sensor, state);
+	if (ret)
+		goto err_pm;
+
+	/*
+	 * Set streaming to true to ensure __v4l2_ctrl_handler_setup() will set
+	 * the controls. The flag is reset to false further down if an error
+	 * occurs.
+	 */
+	sensor->streaming = true;
+
+	ret = __v4l2_ctrl_handler_setup(&sensor->ctrls);
+	if (ret < 0)
+		goto err_pm;
+
+	ret = imx415_stream_on(sensor);
+	if (ret)
+		goto err_pm;
+
+	ret = 0;
+
+unlock:
+	v4l2_subdev_unlock_state(state);
+
+	return ret;
+
+err_pm:
+	/*
+	 * In case of error, turn the power off synchronously as the device
+	 * likely has no other chance to recover.
+	 */
+	pm_runtime_put_sync(sensor->dev);
+	sensor->streaming = false;
+
+	goto unlock;
+}
+
+static int imx415_enum_mbus_code(struct v4l2_subdev *sd,
+				 struct v4l2_subdev_state *state,
+				 struct v4l2_subdev_mbus_code_enum *code)
+{
+	if (code->index != 0)
+		return -EINVAL;
+
+	code->code = MEDIA_BUS_FMT_SGBRG10_1X10;
+
+	return 0;
+}
+
+static int imx415_enum_frame_size(struct v4l2_subdev *sd,
+				  struct v4l2_subdev_state *state,
+				  struct v4l2_subdev_frame_size_enum *fse)
+{
+	const struct v4l2_mbus_framefmt *format;
+
+	format = v4l2_subdev_get_pad_format(sd, state, fse->pad);
+
+	if (fse->index > 0 || fse->code != format->code)
+		return -EINVAL;
+
+	fse->min_width = IMX415_PIXEL_ARRAY_WIDTH;
+	fse->max_width = fse->min_width;
+	fse->min_height = IMX415_PIXEL_ARRAY_HEIGHT;
+	fse->max_height = fse->min_height;
+	return 0;
+}
+
+static int imx415_get_format(struct v4l2_subdev *sd,
+			     struct v4l2_subdev_state *state,
+			     struct v4l2_subdev_format *fmt)
+{
+	fmt->format = *v4l2_subdev_get_pad_format(sd, state, fmt->pad);
+
+	return 0;
+}
+
+static int imx415_set_format(struct v4l2_subdev *sd,
+			     struct v4l2_subdev_state *state,
+			     struct v4l2_subdev_format *fmt)
+{
+	struct v4l2_mbus_framefmt *format;
+
+	format = v4l2_subdev_get_pad_format(sd, state, fmt->pad);
+
+	format->width = fmt->format.width;
+	format->height = fmt->format.height;
+	format->code = MEDIA_BUS_FMT_SGBRG10_1X10;
+	format->field = V4L2_FIELD_NONE;
+	format->colorspace = V4L2_COLORSPACE_RAW;
+	format->ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT;
+	format->quantization = V4L2_QUANTIZATION_DEFAULT;
+	format->xfer_func = V4L2_XFER_FUNC_NONE;
+
+	fmt->format = *format;
+	return 0;
+}
+
+static int imx415_get_selection(struct v4l2_subdev *sd,
+				struct v4l2_subdev_state *sd_state,
+				struct v4l2_subdev_selection *sel)
+{
+	switch (sel->target) {
+	case V4L2_SEL_TGT_CROP:
+	case V4L2_SEL_TGT_CROP_DEFAULT:
+	case V4L2_SEL_TGT_CROP_BOUNDS:
+		sel->r.top = IMX415_PIXEL_ARRAY_TOP;
+		sel->r.left = IMX415_PIXEL_ARRAY_LEFT;
+		sel->r.width = IMX415_PIXEL_ARRAY_WIDTH;
+		sel->r.height = IMX415_PIXEL_ARRAY_HEIGHT;
+
+		return 0;
+	}
+
+	return -EINVAL;
+}
+
+static int imx415_init_cfg(struct v4l2_subdev *sd,
+			   struct v4l2_subdev_state *state)
+{
+	struct v4l2_subdev_format format = {
+		.format = {
+			.width = IMX415_PIXEL_ARRAY_WIDTH,
+			.height = IMX415_PIXEL_ARRAY_HEIGHT,
+		},
+	};
+
+	imx415_set_format(sd, state, &format);
+
+	return 0;
+}
+
+static const struct v4l2_subdev_video_ops imx415_subdev_video_ops = {
+	.s_stream = imx415_s_stream,
+};
+
+static const struct v4l2_subdev_pad_ops imx415_subdev_pad_ops = {
+	.enum_mbus_code = imx415_enum_mbus_code,
+	.enum_frame_size = imx415_enum_frame_size,
+	.get_fmt = imx415_get_format,
+	.set_fmt = imx415_set_format,
+	.get_selection = imx415_get_selection,
+	.init_cfg = imx415_init_cfg,
+};
+
+static const struct v4l2_subdev_ops imx415_subdev_ops = {
+	.video = &imx415_subdev_video_ops,
+	.pad = &imx415_subdev_pad_ops,
+};
+
+static int imx415_subdev_init(struct imx415 *sensor)
+{
+	struct i2c_client *client = to_i2c_client(sensor->dev);
+	int ret;
+
+	v4l2_i2c_subdev_init(&sensor->subdev, client, &imx415_subdev_ops);
+
+	ret = imx415_ctrls_init(sensor);
+	if (ret)
+		return ret;
+
+	sensor->subdev.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE |
+				V4L2_SUBDEV_FL_HAS_EVENTS;
+	sensor->pad.flags = MEDIA_PAD_FL_SOURCE;
+	sensor->subdev.entity.function = MEDIA_ENT_F_CAM_SENSOR;
+	ret = media_entity_pads_init(&sensor->subdev.entity, 1, &sensor->pad);
+	if (ret < 0) {
+		v4l2_ctrl_handler_free(&sensor->ctrls);
+		return ret;
+	}
+
+	sensor->subdev.state_lock = sensor->subdev.ctrl_handler->lock;
+	v4l2_subdev_init_finalize(&sensor->subdev);
+
+	return 0;
+}
+
+static void imx415_subdev_cleanup(struct imx415 *sensor)
+{
+	media_entity_cleanup(&sensor->subdev.entity);
+	v4l2_ctrl_handler_free(&sensor->ctrls);
+}
+
+static int imx415_power_on(struct imx415 *sensor)
+{
+	int ret;
+
+	ret = regulator_bulk_enable(ARRAY_SIZE(sensor->supplies),
+				    sensor->supplies);
+	if (ret < 0)
+		return ret;
+
+	gpiod_set_value_cansleep(sensor->reset, 0);
+
+	udelay(1);
+
+	ret = clk_prepare_enable(sensor->clk);
+	if (ret < 0)
+		goto err_reset;
+
+	/*
+	 * Data sheet states that 20 us are required before communication start,
+	 * but this doesn't work in all cases. Use 100 us to be on the safe
+	 * side.
+	 */
+	usleep_range(100, 200);
+
+	return 0;
+
+err_reset:
+	gpiod_set_value_cansleep(sensor->reset, 1);
+	regulator_bulk_disable(ARRAY_SIZE(sensor->supplies), sensor->supplies);
+	return ret;
+}
+
+static void imx415_power_off(struct imx415 *sensor)
+{
+	clk_disable_unprepare(sensor->clk);
+	gpiod_set_value_cansleep(sensor->reset, 1);
+	regulator_bulk_disable(ARRAY_SIZE(sensor->supplies), sensor->supplies);
+}
+
+static int imx415_identify_model(struct imx415 *sensor)
+{
+	int model, ret;
+
+	/*
+	 * While most registers can be read when the sensor is in standby, this
+	 * is not the case of the sensor info register :-(
+	 */
+	ret = imx415_wakeup(sensor);
+	if (ret)
+		return dev_err_probe(sensor->dev, ret,
+				     "failed to get sensor out of standby\n");
+
+	ret = imx415_read(sensor, IMX415_SENSOR_INFO);
+	if (ret < 0) {
+		dev_err_probe(sensor->dev, ret,
+			      "failed to read sensor information\n");
+		goto done;
+	}
+
+	model = ret & IMX415_SENSOR_INFO_MASK;
+
+	switch (model) {
+	case IMX415_CHIP_ID:
+		dev_info(sensor->dev, "Detected IMX415 image sensor\n");
+		break;
+	default:
+		ret = dev_err_probe(sensor->dev, -ENODEV,
+				    "invalid device model 0x%04x\n", model);
+		goto done;
+	}
+
+	ret = 0;
+
+done:
+	imx415_write(sensor, IMX415_MODE, IMX415_MODE_STANDBY);
+	return ret;
+}
+
+static int imx415_check_inck(unsigned long inck, u64 link_frequency)
+{
+	unsigned int i;
+
+	for (i = 0; i < ARRAY_SIZE(imx415_clk_params); ++i) {
+		if ((imx415_clk_params[i].lane_rate == link_frequency * 2) &&
+		    imx415_clk_params[i].inck == inck)
+			break;
+	}
+
+	if (i == ARRAY_SIZE(imx415_clk_params))
+		return -EINVAL;
+	else
+		return 0;
+}
+
+static int imx415_parse_hw_config(struct imx415 *sensor)
+{
+	struct v4l2_fwnode_endpoint bus_cfg = {
+		.bus_type = V4L2_MBUS_CSI2_DPHY,
+	};
+	struct fwnode_handle *ep;
+	u64 lane_rate;
+	unsigned long inck;
+	unsigned int i, j;
+	int ret;
+
+	for (i = 0; i < ARRAY_SIZE(sensor->supplies); ++i)
+		sensor->supplies[i].supply = imx415_supply_names[i];
+
+	ret = devm_regulator_bulk_get(sensor->dev, ARRAY_SIZE(sensor->supplies),
+				      sensor->supplies);
+	if (ret)
+		return dev_err_probe(sensor->dev, ret,
+				     "failed to get supplies\n");
+
+	sensor->reset = devm_gpiod_get_optional(sensor->dev, "reset",
+						GPIOD_OUT_HIGH);
+	if (IS_ERR(sensor->reset))
+		return dev_err_probe(sensor->dev, PTR_ERR(sensor->reset),
+				     "failed to get reset GPIO\n");
+
+	sensor->clk = devm_clk_get(sensor->dev, "inck");
+	if (IS_ERR(sensor->clk))
+		return dev_err_probe(sensor->dev, PTR_ERR(sensor->clk),
+				     "failed to get clock\n");
+
+	ep = fwnode_graph_get_next_endpoint(dev_fwnode(sensor->dev), NULL);
+	if (!ep)
+		return -ENXIO;
+
+	ret = v4l2_fwnode_endpoint_alloc_parse(ep, &bus_cfg);
+	fwnode_handle_put(ep);
+	if (ret)
+		return ret;
+
+	switch (bus_cfg.bus.mipi_csi2.num_data_lanes) {
+	case 2:
+	case 4:
+		sensor->num_data_lanes = bus_cfg.bus.mipi_csi2.num_data_lanes;
+		break;
+	default:
+		ret = dev_err_probe(sensor->dev, -EINVAL,
+				    "invalid number of CSI2 data lanes %d\n",
+				    bus_cfg.bus.mipi_csi2.num_data_lanes);
+		goto done_endpoint_free;
+	}
+
+	if (!bus_cfg.nr_of_link_frequencies) {
+		ret = dev_err_probe(sensor->dev, -EINVAL,
+				    "no link frequencies defined");
+		goto done_endpoint_free;
+	}
+
+	/*
+	 * Check if there exists a sensor mode defined for current INCK,
+	 * number of lanes and given lane rates.
+	 */
+	inck = clk_get_rate(sensor->clk);
+	for (i = 0; i < bus_cfg.nr_of_link_frequencies; ++i) {
+		if (imx415_check_inck(inck, bus_cfg.link_frequencies[i])) {
+			dev_dbg(sensor->dev,
+				"INCK %lu Hz not supported for this link freq",
+				inck);
+			continue;
+		}
+
+		for (j = 0; j < ARRAY_SIZE(supported_modes); ++j) {
+			if (sensor->num_data_lanes != supported_modes[j].lanes)
+				continue;
+			if (bus_cfg.link_frequencies[i] * 2 !=
+			    supported_modes[j].lane_rate)
+				continue;
+			sensor->cur_mode = j;
+			break;
+		}
+		if (j < ARRAY_SIZE(supported_modes))
+			break;
+	}
+	if (i == bus_cfg.nr_of_link_frequencies) {
+		ret = dev_err_probe(sensor->dev, -EINVAL,
+				    "no valid sensor mode defined\n");
+		goto done_endpoint_free;
+	}
+
+	lane_rate = supported_modes[sensor->cur_mode].lane_rate;
+	for (i = 0; i < ARRAY_SIZE(imx415_clk_params); ++i) {
+		if (lane_rate == imx415_clk_params[i].lane_rate &&
+		    inck == imx415_clk_params[i].inck) {
+			sensor->clk_params = &imx415_clk_params[i];
+			break;
+		}
+	}
+	if (i == ARRAY_SIZE(imx415_clk_params)) {
+		ret = dev_err_probe(sensor->dev, -EINVAL,
+				    "Mode %d not supported\n",
+				    sensor->cur_mode);
+		goto done_endpoint_free;
+	}
+
+	ret = 0;
+	dev_dbg(sensor->dev, "clock: %lu Hz, lane_rate: %llu bps, lanes: %d\n",
+		inck, lane_rate, sensor->num_data_lanes);
+
+done_endpoint_free:
+	v4l2_fwnode_endpoint_free(&bus_cfg);
+
+	return ret;
+}
+
+static int imx415_probe(struct i2c_client *client)
+{
+	struct imx415 *sensor;
+	int ret;
+
+	sensor = devm_kzalloc(&client->dev, sizeof(*sensor), GFP_KERNEL);
+	if (!sensor)
+		return -ENOMEM;
+
+	sensor->dev = &client->dev;
+
+	ret = imx415_parse_hw_config(sensor);
+	if (ret)
+		return ret;
+
+	sensor->regmap = devm_regmap_init_i2c(client, &imx415_regmap_config);
+	if (IS_ERR(sensor->regmap))
+		return PTR_ERR(sensor->regmap);
+
+	/*
+	 * Enable power management. The driver supports runtime PM, but needs to
+	 * work when runtime PM is disabled in the kernel. To that end, power
+	 * the sensor on manually here, identify it, and fully initialize it.
+	 */
+	ret = imx415_power_on(sensor);
+	if (ret)
+		return ret;
+
+	ret = imx415_identify_model(sensor);
+	if (ret)
+		goto err_power;
+
+	ret = imx415_subdev_init(sensor);
+	if (ret)
+		goto err_power;
+
+	/*
+	 * Enable runtime PM. As the device has been powered manually, mark it
+	 * as active, and increase the usage count without resuming the device.
+	 */
+	pm_runtime_set_active(sensor->dev);
+	pm_runtime_get_noresume(sensor->dev);
+	pm_runtime_enable(sensor->dev);
+
+	ret = v4l2_async_register_subdev_sensor(&sensor->subdev);
+	if (ret < 0)
+		goto err_pm;
+
+	/*
+	 * Finally, enable autosuspend and decrease the usage count. The device
+	 * will get suspended after the autosuspend delay, turning the power
+	 * off.
+	 */
+	pm_runtime_set_autosuspend_delay(sensor->dev, 1000);
+	pm_runtime_use_autosuspend(sensor->dev);
+	pm_runtime_put_autosuspend(sensor->dev);
+
+	return 0;
+
+err_pm:
+	pm_runtime_disable(sensor->dev);
+	pm_runtime_put_noidle(sensor->dev);
+	imx415_subdev_cleanup(sensor);
+err_power:
+	imx415_power_off(sensor);
+	return ret;
+}
+
+static void imx415_remove(struct i2c_client *client)
+{
+	struct v4l2_subdev *subdev = i2c_get_clientdata(client);
+	struct imx415 *sensor = to_imx415(subdev);
+
+	v4l2_async_unregister_subdev(subdev);
+
+	imx415_subdev_cleanup(sensor);
+
+	/*
+	 * Disable runtime PM. In case runtime PM is disabled in the kernel,
+	 * make sure to turn power off manually.
+	 */
+	pm_runtime_disable(sensor->dev);
+	if (!pm_runtime_status_suspended(sensor->dev))
+		imx415_power_off(sensor);
+	pm_runtime_set_suspended(sensor->dev);
+}
+
+static int imx415_runtime_resume(struct device *dev)
+{
+	struct i2c_client *client = to_i2c_client(dev);
+	struct v4l2_subdev *subdev = i2c_get_clientdata(client);
+	struct imx415 *sensor = to_imx415(subdev);
+
+	return imx415_power_on(sensor);
+}
+
+static int imx415_runtime_suspend(struct device *dev)
+{
+	struct i2c_client *client = to_i2c_client(dev);
+	struct v4l2_subdev *subdev = i2c_get_clientdata(client);
+	struct imx415 *sensor = to_imx415(subdev);
+
+	imx415_power_off(sensor);
+
+	return 0;
+}
+
+static DEFINE_RUNTIME_DEV_PM_OPS(imx415_pm_ops, imx415_runtime_suspend,
+				 imx415_runtime_resume, NULL);
+
+static const struct of_device_id imx415_of_match[] = {
+	{ .compatible = "sony,imx415" },
+	{ /* sentinel */ }
+};
+
+MODULE_DEVICE_TABLE(of, imx415_of_match);
+
+static struct i2c_driver imx415_driver = {
+	.probe_new = imx415_probe,
+	.remove = imx415_remove,
+	.driver = {
+		.name = "imx415",
+		.of_match_table = imx415_of_match,
+		.pm = pm_ptr(&imx415_pm_ops),
+	},
+};
+
+module_i2c_driver(imx415_driver);
+
+MODULE_DESCRIPTION("Sony IMX415 image sensor driver");
+MODULE_AUTHOR("Gerald Loacker <gerald.loacker@wolfvision.net>");
+MODULE_AUTHOR("Michael Riesch <michael.riesch@wolfvision.net>");
+MODULE_LICENSE("GPL");
-- 
2.30.2