[V1, 2/2] media: i2c: Add more sensor mode for ov8856 camera sensor

[<dongchun.zhu@mediatek.com>]

From: Dongchun Zhu <dongchun.zhu@mediatek.com>

This patch mainly adds two more sensor modes for OV8856 image sensor.
The OV8856 driver currently supports output format: 10-bit Raw,
the resolution of 1632*1224 and 3264*2448, and the bayer order of BGGR.
The hardware version also differs in some OTP regiser,
as well as PLL register setting.

Signed-off-by: Dongchun Zhu <dongchun.zhu@mediatek.com>
---
 drivers/media/i2c/ov8856.c | 624 ++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 621 insertions(+), 3 deletions(-)

diff --git a/drivers/media/i2c/ov8856.c b/drivers/media/i2c/ov8856.c
index cd347d6..e0610b6 100644
--- a/drivers/media/i2c/ov8856.c
+++ b/drivers/media/i2c/ov8856.c
@@ -1,12 +1,15 @@
 // SPDX-License-Identifier: GPL-2.0
 // Copyright (c) 2019 Intel Corporation.
 
+#include <linux/clk.h>
 #include <asm/unaligned.h>
 #include <linux/acpi.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/regulator/consumer.h>
 #include <media/v4l2-ctrls.h>
 #include <media/v4l2-device.h>
 #include <media/v4l2-fwnode.h>
@@ -19,6 +22,7 @@
 #define OV8856_LINK_FREQ_180MHZ		180000000ULL
 #define OV8856_SCLK			144000000ULL
 #define OV8856_MCLK			19200000
+#define OV8856_XVCLK_FREQ		24000000
 #define OV8856_DATA_LANES		4
 #define OV8856_RGB_DEPTH		10
 
@@ -29,6 +33,18 @@
 #define OV8856_MODE_STANDBY		0x00
 #define OV8856_MODE_STREAMING		0x01
 
+/* define 1B module */
+#define OV8856_1B_MODULE		0x02
+
+/* otp sram register */
+#define OV8856_OTP_REG			0x700f
+#define OV8856_OTP_REG_ONE		0x3d84
+#define OV8856_OTP_REG_TWO		0x3d81
+
+/* clock register */
+#define OV8856_CLK_REG			0x3614
+#define OV8856_CLK_REG_1B_VAL		0x20
+
 /* vertical-timings from sensor */
 #define OV8856_REG_VTS			0x380e
 #define OV8856_VTS_MAX			0x7fff
@@ -64,6 +80,14 @@
 
 #define to_ov8856(_sd)			container_of(_sd, struct ov8856, sd)
 
+static const char * const ov8856_supply_names[] = {
+	"dovdd",	/* Digital I/O power */
+	"avdd",		/* Analog power */
+	"dvdd",		/* Digital core power */
+};
+
+#define OV8856_NUM_SUPPLIES ARRAY_SIZE(ov8856_supply_names)
+
 enum {
 	OV8856_LINK_FREQ_720MBPS,
 	OV8856_LINK_FREQ_360MBPS,
@@ -316,6 +340,208 @@ static const struct ov8856_reg mode_3280x2464_regs[] = {
 	{0x5e00, 0x00}
 };
 
+static const struct ov8856_reg mode_3264x2448_regs[] = {
+	{0x0103, 0x01},
+	{0x0302, 0x3c},
+	{0x0303, 0x01},
+	{0x031e, 0x0c},
+	{0x3000, 0x00},
+	{0x300e, 0x00},
+	{0x3010, 0x00},
+	{0x3015, 0x84},
+	{0x3018, 0x72},
+	{0x3021, 0x23},
+	{0x3033, 0x24},
+	{0x3500, 0x00},
+	{0x3501, 0x9a},
+	{0x3502, 0x20},
+	{0x3503, 0x08},
+	{0x3505, 0x83},
+	{0x3508, 0x01},
+	{0x3509, 0x80},
+	{0x350c, 0x00},
+	{0x350d, 0x80},
+	{0x350e, 0x04},
+	{0x350f, 0x00},
+	{0x3510, 0x00},
+	{0x3511, 0x02},
+	{0x3512, 0x00},
+	{0x3600, 0x72},
+	{0x3601, 0x40},
+	{0x3602, 0x30},
+	{0x3610, 0xc5},
+	{0x3611, 0x58},
+	{0x3612, 0x5c},
+	{0x3613, 0xca},
+	{0x3614, 0x60},
+	{0x3628, 0xff},
+	{0x3629, 0xff},
+	{0x362a, 0xff},
+	{0x3633, 0x10},
+	{0x3634, 0x10},
+	{0x3635, 0x10},
+	{0x3636, 0x10},
+	{0x3663, 0x08},
+	{0x3669, 0x34},
+	{0x366d, 0x00},
+	{0x366e, 0x10},
+	{0x3706, 0x86},
+	{0x370b, 0x7e},
+	{0x3714, 0x23},
+	{0x3730, 0x12},
+	{0x3733, 0x10},
+	{0x3764, 0x00},
+	{0x3765, 0x00},
+	{0x3769, 0x62},
+	{0x376a, 0x2a},
+	{0x376b, 0x30},
+	{0x3780, 0x00},
+	{0x3781, 0x24},
+	{0x3782, 0x00},
+	{0x3783, 0x23},
+	{0x3798, 0x2f},
+	{0x37a1, 0x60},
+	{0x37a8, 0x6a},
+	{0x37ab, 0x3f},
+	{0x37c2, 0x04},
+	{0x37c3, 0xf1},
+	{0x37c9, 0x80},
+	{0x37cb, 0x16},
+	{0x37cc, 0x16},
+	{0x37cd, 0x16},
+	{0x37ce, 0x16},
+	{0x3800, 0x00},
+	{0x3801, 0x00},
+	{0x3802, 0x00},
+	{0x3803, 0x0c},
+	{0x3804, 0x0c},
+	{0x3805, 0xdf},
+	{0x3806, 0x09},
+	{0x3807, 0xa3},
+	{0x3808, 0x0c},
+	{0x3809, 0xc0},
+	{0x380a, 0x09},
+	{0x380b, 0x90},
+	{0x380c, 0x07},
+	{0x380d, 0x8c},
+	{0x380e, 0x09},
+	{0x380f, 0xb2},
+	{0x3810, 0x00},
+	{0x3811, 0x04},
+	{0x3812, 0x00},
+	{0x3813, 0x02},
+	{0x3814, 0x01},
+	{0x3815, 0x01},
+	{0x3816, 0x00},
+	{0x3817, 0x00},
+	{0x3818, 0x00},
+	{0x3819, 0x00},
+	{0x3820, 0x80},
+	{0x3821, 0x46},
+	{0x382a, 0x01},
+	{0x382b, 0x01},
+	{0x3830, 0x06},
+	{0x3836, 0x02},
+	{0x3862, 0x04},
+	{0x3863, 0x08},
+	{0x3cc0, 0x33},
+	{0x3d85, 0x17},
+	{0x3d8c, 0x73},
+	{0x3d8d, 0xde},
+	{0x4001, 0xe0},
+	{0x4003, 0x40},
+	{0x4008, 0x00},
+	{0x4009, 0x0b},
+	{0x400a, 0x00},
+	{0x400b, 0x84},
+	{0x400f, 0x80},
+	{0x4010, 0xf0},
+	{0x4011, 0xff},
+	{0x4012, 0x02},
+	{0x4013, 0x01},
+	{0x4014, 0x01},
+	{0x4015, 0x01},
+	{0x4042, 0x00},
+	{0x4043, 0x80},
+	{0x4044, 0x00},
+	{0x4045, 0x80},
+	{0x4046, 0x00},
+	{0x4047, 0x80},
+	{0x4048, 0x00},
+	{0x4049, 0x80},
+	{0x4041, 0x03},
+	{0x404c, 0x20},
+	{0x404d, 0x00},
+	{0x404e, 0x20},
+	{0x4203, 0x80},
+	{0x4307, 0x30},
+	{0x4317, 0x00},
+	{0x4502, 0x50},
+	{0x4503, 0x08},
+	{0x4601, 0x80},
+	{0x4800, 0x44},
+	{0x4816, 0x53},
+	{0x481b, 0x50},
+	{0x481f, 0x27},
+	{0x4823, 0x3c},
+	{0x482b, 0x00},
+	{0x4831, 0x66},
+	{0x4837, 0x16},
+	{0x483c, 0x0f},
+	{0x484b, 0x05},
+	{0x5000, 0x77},
+	{0x5001, 0x0a},
+	{0x5003, 0xc8},
+	{0x5004, 0x04},
+	{0x5006, 0x00},
+	{0x5007, 0x00},
+	{0x502e, 0x03},
+	{0x5030, 0x41},
+	{0x5780, 0x14},
+	{0x5781, 0x0f},
+	{0x5782, 0x44},
+	{0x5783, 0x02},
+	{0x5784, 0x01},
+	{0x5785, 0x01},
+	{0x5786, 0x00},
+	{0x5787, 0x04},
+	{0x5788, 0x02},
+	{0x5789, 0x0f},
+	{0x578a, 0xfd},
+	{0x578b, 0xf5},
+	{0x578c, 0xf5},
+	{0x578d, 0x03},
+	{0x578e, 0x08},
+	{0x578f, 0x0c},
+	{0x5790, 0x08},
+	{0x5791, 0x04},
+	{0x5792, 0x00},
+	{0x5793, 0x52},
+	{0x5794, 0xa3},
+	{0x5795, 0x02},
+	{0x5796, 0x20},
+	{0x5797, 0x20},
+	{0x5798, 0xd5},
+	{0x5799, 0xd5},
+	{0x579a, 0x00},
+	{0x579b, 0x50},
+	{0x579c, 0x00},
+	{0x579d, 0x2c},
+	{0x579e, 0x0c},
+	{0x579f, 0x40},
+	{0x57a0, 0x09},
+	{0x57a1, 0x40},
+	{0x59f8, 0x3d},
+	{0x5a08, 0x02},
+	{0x5b00, 0x02},
+	{0x5b01, 0x10},
+	{0x5b02, 0x03},
+	{0x5b03, 0xcf},
+	{0x5b05, 0x6c},
+	{0x5e00, 0x00},
+	{0x5e10, 0xfc}
+};
+
 static const struct ov8856_reg mode_1640x1232_regs[] = {
 	{0x3000, 0x20},
 	{0x3003, 0x08},
@@ -506,6 +732,208 @@ static const struct ov8856_reg mode_1640x1232_regs[] = {
 	{0x5e00, 0x00}
 };
 
+static const struct ov8856_reg mode_1632x1224_regs[] = {
+	{0x0103, 0x01},
+	{0x0302, 0x3c},
+	{0x0303, 0x01},
+	{0x031e, 0x0c},
+	{0x3000, 0x00},
+	{0x300e, 0x00},
+	{0x3010, 0x00},
+	{0x3015, 0x84},
+	{0x3018, 0x72},
+	{0x3021, 0x23},
+	{0x3033, 0x24},
+	{0x3500, 0x00},
+	{0x3501, 0x4c},
+	{0x3502, 0xe0},
+	{0x3503, 0x08},
+	{0x3505, 0x83},
+	{0x3508, 0x01},
+	{0x3509, 0x80},
+	{0x350c, 0x00},
+	{0x350d, 0x80},
+	{0x350e, 0x04},
+	{0x350f, 0x00},
+	{0x3510, 0x00},
+	{0x3511, 0x02},
+	{0x3512, 0x00},
+	{0x3600, 0x72},
+	{0x3601, 0x40},
+	{0x3602, 0x30},
+	{0x3610, 0xc5},
+	{0x3611, 0x58},
+	{0x3612, 0x5c},
+	{0x3613, 0xca},
+	{0x3614, 0x60},
+	{0x3628, 0xff},
+	{0x3629, 0xff},
+	{0x362a, 0xff},
+	{0x3633, 0x10},
+	{0x3634, 0x10},
+	{0x3635, 0x10},
+	{0x3636, 0x10},
+	{0x3663, 0x08},
+	{0x3669, 0x34},
+	{0x366d, 0x00},
+	{0x366e, 0x08},
+	{0x3706, 0x86},
+	{0x370b, 0x7e},
+	{0x3714, 0x27},
+	{0x3730, 0x12},
+	{0x3733, 0x10},
+	{0x3764, 0x00},
+	{0x3765, 0x00},
+	{0x3769, 0x62},
+	{0x376a, 0x2a},
+	{0x376b, 0x30},
+	{0x3780, 0x00},
+	{0x3781, 0x24},
+	{0x3782, 0x00},
+	{0x3783, 0x23},
+	{0x3798, 0x2f},
+	{0x37a1, 0x60},
+	{0x37a8, 0x6a},
+	{0x37ab, 0x3f},
+	{0x37c2, 0x14},
+	{0x37c3, 0xf1},
+	{0x37c9, 0x80},
+	{0x37cb, 0x16},
+	{0x37cc, 0x16},
+	{0x37cd, 0x16},
+	{0x37ce, 0x16},
+	{0x3800, 0x00},
+	{0x3801, 0x00},
+	{0x3802, 0x00},
+	{0x3803, 0x0c},
+	{0x3804, 0x0c},
+	{0x3805, 0xdf},
+	{0x3806, 0x09},
+	{0x3807, 0xa3},
+	{0x3808, 0x06},
+	{0x3809, 0x60},
+	{0x380a, 0x04},
+	{0x380b, 0xc8},
+	{0x380c, 0x07},
+	{0x380d, 0x8c},
+	{0x380e, 0x09},
+	{0x380f, 0xb2},
+	{0x3810, 0x00},
+	{0x3811, 0x02},
+	{0x3812, 0x00},
+	{0x3813, 0x02},
+	{0x3814, 0x03},
+	{0x3815, 0x01},
+	{0x3816, 0x00},
+	{0x3817, 0x00},
+	{0x3818, 0x00},
+	{0x3819, 0x00},
+	{0x3820, 0x80},
+	{0x3821, 0x47},
+	{0x382a, 0x03},
+	{0x382b, 0x01},
+	{0x3830, 0x06},
+	{0x3836, 0x02},
+	{0x3862, 0x04},
+	{0x3863, 0x08},
+	{0x3cc0, 0x33},
+	{0x3d85, 0x17},
+	{0x3d8c, 0x73},
+	{0x3d8d, 0xde},
+	{0x4001, 0xe0},
+	{0x4003, 0x40},
+	{0x4008, 0x00},
+	{0x4009, 0x05},
+	{0x400a, 0x00},
+	{0x400b, 0x84},
+	{0x400f, 0x80},
+	{0x4010, 0xf0},
+	{0x4011, 0xff},
+	{0x4012, 0x02},
+	{0x4013, 0x01},
+	{0x4014, 0x01},
+	{0x4015, 0x01},
+	{0x4042, 0x00},
+	{0x4043, 0x80},
+	{0x4044, 0x00},
+	{0x4045, 0x80},
+	{0x4046, 0x00},
+	{0x4047, 0x80},
+	{0x4048, 0x00},
+	{0x4049, 0x80},
+	{0x4041, 0x03},
+	{0x404c, 0x20},
+	{0x404d, 0x00},
+	{0x404e, 0x20},
+	{0x4203, 0x80},
+	{0x4307, 0x30},
+	{0x4317, 0x00},
+	{0x4502, 0x50},
+	{0x4503, 0x08},
+	{0x4601, 0x80},
+	{0x4800, 0x44},
+	{0x4816, 0x53},
+	{0x481b, 0x50},
+	{0x481f, 0x27},
+	{0x4823, 0x3c},
+	{0x482b, 0x00},
+	{0x4831, 0x66},
+	{0x4837, 0x16},
+	{0x483c, 0x0f},
+	{0x484b, 0x05},
+	{0x5000, 0x77},
+	{0x5001, 0x0a},
+	{0x5003, 0xc8},
+	{0x5004, 0x04},
+	{0x5006, 0x00},
+	{0x5007, 0x00},
+	{0x502e, 0x03},
+	{0x5030, 0x41},
+	{0x5795, 0x00},
+	{0x5796, 0x10},
+	{0x5797, 0x10},
+	{0x5798, 0x73},
+	{0x5799, 0x73},
+	{0x579a, 0x00},
+	{0x579b, 0x28},
+	{0x579c, 0x00},
+	{0x579d, 0x16},
+	{0x579e, 0x06},
+	{0x579f, 0x20},
+	{0x57a0, 0x04},
+	{0x57a1, 0xa0},
+	{0x5780, 0x14},
+	{0x5781, 0x0f},
+	{0x5782, 0x44},
+	{0x5783, 0x02},
+	{0x5784, 0x01},
+	{0x5785, 0x01},
+	{0x5786, 0x00},
+	{0x5787, 0x04},
+	{0x5788, 0x02},
+	{0x5789, 0x0f},
+	{0x578a, 0xfd},
+	{0x578b, 0xf5},
+	{0x578c, 0xf5},
+	{0x578d, 0x03},
+	{0x578e, 0x08},
+	{0x578f, 0x0c},
+	{0x5790, 0x08},
+	{0x5791, 0x04},
+	{0x5792, 0x00},
+	{0x5793, 0x52},
+	{0x5794, 0xa3},
+	{0x59f8, 0x3d},
+	{0x5a08, 0x02},
+	{0x5b00, 0x02},
+	{0x5b01, 0x10},
+	{0x5b02, 0x03},
+	{0x5b03, 0xcf},
+	{0x5b05, 0x6c},
+	{0x5e00, 0x00},
+	{0x5e10, 0xfc}
+};
+
 static const char * const ov8856_test_pattern_menu[] = {
 	"Disabled",
 	"Standard Color Bar",
@@ -548,6 +976,18 @@ static const struct ov8856_mode supported_modes[] = {
 		.link_freq_index = OV8856_LINK_FREQ_720MBPS,
 	},
 	{
+		.width    = 3264,
+		.height   = 2448,
+		.hts      = 1932,
+		.vts_def  = 2482,
+		.vts_min  = 2482,
+		.reg_list = {
+			.num_of_regs = ARRAY_SIZE(mode_3264x2448_regs),
+			.regs = mode_3264x2448_regs,
+		},
+		.link_freq_index = OV8856_LINK_FREQ_720MBPS,
+	},
+	{
 		.width = 1640,
 		.height = 1232,
 		.hts = 3820,
@@ -558,6 +998,18 @@ static const struct ov8856_mode supported_modes[] = {
 			.regs = mode_1640x1232_regs,
 		},
 		.link_freq_index = OV8856_LINK_FREQ_360MBPS,
+	},
+	{
+		.width    = 1632,
+		.height   = 1224,
+		.hts      = 1932,
+		.vts_def  = 2482,
+		.vts_min  = 2482,
+		.reg_list = {
+			.num_of_regs = ARRAY_SIZE(mode_1632x1224_regs),
+			.regs = mode_1632x1224_regs,
+		},
+		.link_freq_index = OV8856_LINK_FREQ_360MBPS,
 	}
 };
 
@@ -566,6 +1018,10 @@ struct ov8856 {
 	struct media_pad pad;
 	struct v4l2_ctrl_handler ctrl_handler;
 
+	struct clk		*xvclk;
+	struct gpio_desc	*reset_gpio;
+	struct regulator_bulk_data supplies[OV8856_NUM_SUPPLIES];
+
 	/* V4L2 Controls */
 	struct v4l2_ctrl *link_freq;
 	struct v4l2_ctrl *pixel_rate;
@@ -576,6 +1032,9 @@ struct ov8856 {
 	/* Current mode */
 	const struct ov8856_mode *cur_mode;
 
+	/* module hardware version */
+	bool is_1B_module;
+
 	/* To serialize asynchronus callbacks */
 	struct mutex mutex;
 
@@ -696,6 +1155,24 @@ static int ov8856_test_pattern(struct ov8856 *ov8856, u32 pattern)
 				OV8856_REG_VALUE_08BIT, pattern);
 }
 
+static int ov8856_update_otp_reg(struct ov8856 *ov8856)
+{
+	int ret;
+
+	ret = ov8856_write_reg(ov8856, OV8856_REG_MODE_SELECT,
+			       OV8856_REG_VALUE_08BIT, OV8856_MODE_STREAMING);
+	if (ret)
+		return ret;
+
+	ret = ov8856_write_reg(ov8856, OV8856_OTP_REG_ONE,
+			       OV8856_REG_VALUE_08BIT, OV8856_MODE_STANDBY);
+	if (ret)
+		return ret;
+
+	return ov8856_write_reg(ov8856, OV8856_OTP_REG_TWO,
+				OV8856_REG_VALUE_08BIT, OV8856_MODE_STREAMING);
+}
+
 static int ov8856_set_ctrl(struct v4l2_ctrl *ctrl)
 {
 	struct ov8856 *ov8856 = container_of(ctrl->handler,
@@ -825,7 +1302,13 @@ static void ov8856_update_pad_format(const struct ov8856_mode *mode,
 {
 	fmt->width = mode->width;
 	fmt->height = mode->height;
-	fmt->code = MEDIA_BUS_FMT_SGRBG10_1X10;
+
+	/* Bayer Order is determined by image resolution */
+	if (fmt->width == 3264 || fmt->width == 1632)
+		fmt->code = MEDIA_BUS_FMT_SBGGR10_1X10;
+	else
+		fmt->code = MEDIA_BUS_FMT_SGRBG10_1X10;
+
 	fmt->field = V4L2_FIELD_NONE;
 }
 
@@ -850,6 +1333,17 @@ static int ov8856_start_streaming(struct ov8856 *ov8856)
 		return ret;
 	}
 
+	/* update R3614 for 1B module */
+	if (ov8856->is_1B_module) {
+		ret = ov8856_write_reg(ov8856, OV8856_CLK_REG,
+				       OV8856_REG_VALUE_08BIT,
+				       OV8856_CLK_REG_1B_VAL);
+		if (ret) {
+			dev_err(&client->dev, "failed to set R3614");
+			return ret;
+		}
+	}
+
 	ret = __v4l2_ctrl_handler_setup(ov8856->sd.ctrl_handler);
 	if (ret)
 		return ret;
@@ -882,6 +1376,8 @@ static int ov8856_set_stream(struct v4l2_subdev *sd, int enable)
 	if (ov8856->streaming == enable)
 		return 0;
 
+	dev_dbg(&client->dev, "hardware version: (%d)\n", ov8856->is_1B_module);
+
 	mutex_lock(&ov8856->mutex);
 	if (enable) {
 		ret = pm_runtime_get_sync(&client->dev);
@@ -908,6 +1404,54 @@ static int ov8856_set_stream(struct v4l2_subdev *sd, int enable)
 	return ret;
 }
 
+/* Calculate the delay in us by clock rate and clock cycles */
+static inline u32 ov8856_cal_delay(u32 cycles)
+{
+	return DIV_ROUND_UP(cycles, OV8856_XVCLK_FREQ / 1000 / 1000);
+}
+
+static int __ov8856_power_on(struct ov8856 *ov8856)
+{
+	int ret;
+	u32 delay_us;
+	struct i2c_client *client = v4l2_get_subdevdata(&ov8856->sd);
+
+	ret = clk_prepare_enable(ov8856->xvclk);
+	if (ret < 0) {
+		dev_err(&client->dev, "Failed to enable xvclk\n");
+		return ret;
+	}
+
+	gpiod_set_value_cansleep(ov8856->reset_gpio, 1);
+
+	ret = regulator_bulk_enable(OV8856_NUM_SUPPLIES, ov8856->supplies);
+	if (ret < 0) {
+		dev_err(&client->dev, "Failed to enable regulators\n");
+		goto disable_clk;
+	}
+
+	gpiod_set_value_cansleep(ov8856->reset_gpio, 0);
+
+	/* 8192 cycles prior to first SCCB transaction */
+	delay_us = ov8856_cal_delay(8192);
+	usleep_range(delay_us  * 2, delay_us * 4);
+
+	return 0;
+
+disable_clk:
+	clk_disable_unprepare(ov8856->xvclk);
+
+	return ret;
+}
+
+static void __ov8856_power_off(struct ov8856 *ov8856)
+{
+	clk_disable_unprepare(ov8856->xvclk);
+	gpiod_set_value_cansleep(ov8856->reset_gpio, 1);
+
+	regulator_bulk_disable(OV8856_NUM_SUPPLIES, ov8856->supplies);
+}
+
 static int __maybe_unused ov8856_suspend(struct device *dev)
 {
 	struct i2c_client *client = to_i2c_client(dev);
@@ -915,8 +1459,8 @@ static int __maybe_unused ov8856_suspend(struct device *dev)
 	struct ov8856 *ov8856 = to_ov8856(sd);
 
 	mutex_lock(&ov8856->mutex);
-	if (ov8856->streaming)
-		ov8856_stop_streaming(ov8856);
+
+	__ov8856_power_off(ov8856);
 
 	mutex_unlock(&ov8856->mutex);
 
@@ -1089,6 +1633,20 @@ static int ov8856_identify_module(struct ov8856 *ov8856)
 		return -ENXIO;
 	}
 
+	/* set R3614 to distinguish harward versions */
+	ret = ov8856_update_otp_reg(ov8856);
+	if (ret) {
+		dev_err(&client->dev, "failed to set otp register");
+		return ret;
+	}
+
+	ret = ov8856_read_reg(ov8856, OV8856_OTP_REG,
+			      OV8856_REG_VALUE_08BIT, &val);
+	if (ret)
+		return ret;
+
+	ov8856->is_1B_module = (val == OV8856_1B_MODULE) ? 1 : 0;
+
 	return 0;
 }
 
@@ -1164,11 +1722,27 @@ static int ov8856_remove(struct i2c_client *client)
 	media_entity_cleanup(&sd->entity);
 	v4l2_ctrl_handler_free(sd->ctrl_handler);
 	pm_runtime_disable(&client->dev);
+	if (!pm_runtime_status_suspended(&client->dev))
+		__ov8856_power_off(ov8856);
+	pm_runtime_set_suspended(&client->dev);
 	mutex_destroy(&ov8856->mutex);
 
 	return 0;
 }
 
+static int ov8856_configure_regulators(struct ov8856 *ov8856)
+{
+	struct i2c_client *client = v4l2_get_subdevdata(&ov8856->sd);
+	int i;
+
+	for (i = 0; i < OV8856_NUM_SUPPLIES; i++)
+		ov8856->supplies[i].supply = ov8856_supply_names[i];
+
+	return devm_regulator_bulk_get(&client->dev,
+				       OV8856_NUM_SUPPLIES,
+				       ov8856->supplies);
+}
+
 static int ov8856_probe(struct i2c_client *client)
 {
 	struct ov8856 *ov8856;
@@ -1186,6 +1760,40 @@ static int ov8856_probe(struct i2c_client *client)
 		return -ENOMEM;
 
 	v4l2_i2c_subdev_init(&ov8856->sd, client, &ov8856_subdev_ops);
+
+	ov8856->xvclk = devm_clk_get(&client->dev, "xvclk");
+	if (IS_ERR(ov8856->xvclk)) {
+		dev_err(&client->dev, "Failed to get xvclk\n");
+		return -EINVAL;
+	}
+
+	ret = clk_set_rate(ov8856->xvclk, OV8856_XVCLK_FREQ);
+	if (ret < 0) {
+		dev_err(&client->dev, "Failed to set xvclk rate (24MHz)\n");
+		return ret;
+	}
+	if (clk_get_rate(ov8856->xvclk) != OV8856_XVCLK_FREQ)
+		dev_warn(&client->dev,
+			 "xvclk mismatched, modes are based on 24MHz\n");
+
+	ov8856->reset_gpio = devm_gpiod_get(&client->dev,
+					    "reset",
+					    GPIOD_OUT_LOW);
+	if (IS_ERR(ov8856->reset_gpio)) {
+		dev_err(&client->dev, "Failed to get reset-gpios\n");
+		return -EINVAL;
+	}
+
+	ret = ov8856_configure_regulators(ov8856);
+	if (ret) {
+		dev_err(&client->dev, "Failed to get power regulators\n");
+		return ret;
+	}
+
+	ret = __ov8856_power_on(ov8856);
+	if (ret)
+		goto probe_error_v4l2_ctrl_handler_free;
+
 	ret = ov8856_identify_module(ov8856);
 	if (ret) {
 		dev_err(&client->dev, "failed to find sensor: %d", ret);
@@ -1251,11 +1859,21 @@ static const struct acpi_device_id ov8856_acpi_ids[] = {
 MODULE_DEVICE_TABLE(acpi, ov8856_acpi_ids);
 #endif
 
+#if IS_ENABLED(CONFIG_OF)
+static const struct of_device_id ov8856_of_match[] = {
+	{ .compatible = "ovti,ov8856" },
+	{},
+};
+
+MODULE_DEVICE_TABLE(of, ov8856_of_match);
+#endif
+
 static struct i2c_driver ov8856_i2c_driver = {
 	.driver = {
 		.name = "ov8856",
 		.pm = &ov8856_pm_ops,
 		.acpi_match_table = ACPI_PTR(ov8856_acpi_ids),
+		.of_match_table = of_match_ptr(ov8856_of_match),
 	},
 	.probe_new = ov8856_probe,
 	.remove = ov8856_remove,
-- 
2.9.2