Re: [PATCH v4 25/25] media: i2c: imx258: Convert to new CCI register access helpers

Tommaso Merciai
2024-04-15T14:47:26Z

Hi Luis,

On Sun, Apr 14, 2024 at 02:35:03PM -0600, git@luigi311.com wrote:
> From: Luis Garcia <git@luigi311.com>
>
> Use the new comon CCI register access helpers to replace the private
> register access helpers in the imx258 driver.
>
> Signed-off-by: Luis Garcia <git@luigi311.com>
> ---
> drivers/media/i2c/Kconfig | 1 +
> drivers/media/i2c/imx258.c | 804 ++++++++++++++++---------------------
> 2 files changed, 346 insertions(+), 459 deletions(-)
>
> diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig
> index 56f276b920ab..6707b0c3c4eb 100644
> --- a/drivers/media/i2c/Kconfig
> +++ b/drivers/media/i2c/Kconfig
> @@ -139,6 +139,7 @@ config VIDEO_IMX219
>
> config VIDEO_IMX258
> tristate "Sony IMX258 sensor support"
> + select V4L2_CCI_I2C
> help
> This is a Video4Linux2 sensor driver for the Sony
> IMX258 camera.
> diff --git a/drivers/media/i2c/imx258.c b/drivers/media/i2c/imx258.c
> index 65846dff775e..8fc9750e5ec9 100644
> --- a/drivers/media/i2c/imx258.c
> +++ b/drivers/media/i2c/imx258.c
> @@ -8,22 +8,20 @@
> #include <linux/module.h>
> #include <linux/pm_runtime.h>
> #include <linux/regulator/consumer.h>
> +#include <media/v4l2-cci.h>
> #include <media/v4l2-ctrls.h>
> #include <media/v4l2-device.h>
> #include <media/v4l2-fwnode.h>
> #include <asm/unaligned.h>
>
> -#define IMX258_REG_VALUE_08BIT 1
> -#define IMX258_REG_VALUE_16BIT 2
> -
> -#define IMX258_REG_MODE_SELECT 0x0100
> +#define IMX258_REG_MODE_SELECT CCI_REG8(0x0100)
> #define IMX258_MODE_STANDBY 0x00
> #define IMX258_MODE_STREAMING 0x01
>
> -#define IMX258_REG_RESET 0x0103
> +#define IMX258_REG_RESET CCI_REG8(0x0103)
>
> /* Chip ID */
> -#define IMX258_REG_CHIP_ID 0x0016
> +#define IMX258_REG_CHIP_ID CCI_REG16(0x0016)
> #define IMX258_CHIP_ID 0x0258
>
> /* V_TIMING internal */
> @@ -32,13 +30,11 @@
> #define IMX258_VTS_30FPS_VGA 0x034c
> #define IMX258_VTS_MAX 65525
>
> -#define IMX258_REG_VTS 0x0340
> -
> /* HBLANK control - read only */
> #define IMX258_PPL_DEFAULT 5352
>
> /* Exposure control */
> -#define IMX258_REG_EXPOSURE 0x0202
> +#define IMX258_REG_EXPOSURE CCI_REG16(0x0202)
> #define IMX258_EXPOSURE_OFFSET 10
> #define IMX258_EXPOSURE_MIN 4
> #define IMX258_EXPOSURE_STEP 1
> @@ -46,38 +42,38 @@
> #define IMX258_EXPOSURE_MAX (IMX258_VTS_MAX - IMX258_EXPOSURE_OFFSET)
>
> /* Analog gain control */
> -#define IMX258_REG_ANALOG_GAIN 0x0204
> +#define IMX258_REG_ANALOG_GAIN CCI_REG16(0x0204)
> #define IMX258_ANA_GAIN_MIN 0
> #define IMX258_ANA_GAIN_MAX 480
> #define IMX258_ANA_GAIN_STEP 1
> #define IMX258_ANA_GAIN_DEFAULT 0x0
>
> /* Digital gain control */
> -#define IMX258_REG_GR_DIGITAL_GAIN 0x020e
> -#define IMX258_REG_R_DIGITAL_GAIN 0x0210
> -#define IMX258_REG_B_DIGITAL_GAIN 0x0212
> -#define IMX258_REG_GB_DIGITAL_GAIN 0x0214
> +#define IMX258_REG_GR_DIGITAL_GAIN CCI_REG16(0x020e)
> +#define IMX258_REG_R_DIGITAL_GAIN CCI_REG16(0x0210)
> +#define IMX258_REG_B_DIGITAL_GAIN CCI_REG16(0x0212)
> +#define IMX258_REG_GB_DIGITAL_GAIN CCI_REG16(0x0214)
> #define IMX258_DGTL_GAIN_MIN 0
> #define IMX258_DGTL_GAIN_MAX 4096 /* Max = 0xFFF */
> #define IMX258_DGTL_GAIN_DEFAULT 1024
> #define IMX258_DGTL_GAIN_STEP 1
>
> /* HDR control */
> -#define IMX258_REG_HDR 0x0220
> +#define IMX258_REG_HDR CCI_REG8(0x0220)
> #define IMX258_HDR_ON BIT(0)
> -#define IMX258_REG_HDR_RATIO 0x0222
> +#define IMX258_REG_HDR_RATIO CCI_REG8(0x0222)
> #define IMX258_HDR_RATIO_MIN 0
> #define IMX258_HDR_RATIO_MAX 5
> #define IMX258_HDR_RATIO_STEP 1
> #define IMX258_HDR_RATIO_DEFAULT 0x0
>
> /* Test Pattern Control */
> -#define IMX258_REG_TEST_PATTERN 0x0600
> +#define IMX258_REG_TEST_PATTERN CCI_REG16(0x0600)
>
> -#define IMX258_CLK_BLANK_STOP 0x4040
> +#define IMX258_CLK_BLANK_STOP CCI_REG8(0x4040)
>
> /* Orientation */
> -#define REG_MIRROR_FLIP_CONTROL 0x0101
> +#define REG_MIRROR_FLIP_CONTROL CCI_REG8(0x0101)
> #define REG_CONFIG_MIRROR_HFLIP 0x01
> #define REG_CONFIG_MIRROR_VFLIP 0x02
>
> @@ -89,14 +85,53 @@
> #define IMX258_PIXEL_ARRAY_WIDTH 4208U
> #define IMX258_PIXEL_ARRAY_HEIGHT 3120U
>
> -struct imx258_reg {
> - u16 address;
> - u8 val;
> -};
> +/* regs */
> +#define IMX258_REG_PLL_MULT_DRIV CCI_REG8(0x0310)
> +#define IMX258_REG_IVTPXCK_DIV CCI_REG8(0x0301)
> +#define IMX258_REG_IVTSYCK_DIV CCI_REG8(0x0303)
> +#define IMX258_REG_PREPLLCK_VT_DIV CCI_REG8(0x0305)
> +#define IMX258_REG_IOPPXCK_DIV CCI_REG8(0x0309)
> +#define IMX258_REG_IOPSYCK_DIV CCI_REG8(0x030b)
> +#define IMX258_REG_PREPLLCK_OP_DIV CCI_REG8(0x030d)
> +#define IMX258_REG_PHASE_PIX_OUTEN CCI_REG8(0x3030)
> +#define IMX258_REG_PDPIX_DATA_RATE CCI_REG8(0x3032)
> +#define IMX258_REG_SCALE_MODE CCI_REG8(0x0401)
> +#define IMX258_REG_SCALE_MODE_EXT CCI_REG8(0x3038)
> +#define IMX258_REG_AF_WINDOW_MODE CCI_REG8(0x7bcd)
> +#define IMX258_REG_FRM_LENGTH_CTL CCI_REG8(0x0350)
> +#define IMX258_REG_CSI_LANE_MODE CCI_REG8(0x0114)
> +#define IMX258_REG_X_EVN_INC CCI_REG8(0x0381)
> +#define IMX258_REG_X_ODD_INC CCI_REG8(0x0383)
> +#define IMX258_REG_Y_EVN_INC CCI_REG8(0x0385)
> +#define IMX258_REG_Y_ODD_INC CCI_REG8(0x0387)
> +#define IMX258_REG_BINNING_MODE CCI_REG8(0x0900)
> +#define IMX258_REG_BINNING_TYPE_V CCI_REG8(0x0901)
> +#define IMX258_REG_FORCE_FD_SUM CCI_REG8(0x300d)
> +#define IMX258_REG_DIG_CROP_X_OFFSET CCI_REG16(0x0408)
> +#define IMX258_REG_DIG_CROP_Y_OFFSET CCI_REG16(0x040a)
> +#define IMX258_REG_DIG_CROP_IMAGE_WIDTH CCI_REG16(0x040c)
> +#define IMX258_REG_DIG_CROP_IMAGE_HEIGHT CCI_REG16(0x040e)
> +#define IMX258_REG_SCALE_M CCI_REG16(0x0404)
> +#define IMX258_REG_X_OUT_SIZE CCI_REG16(0x034c)
> +#define IMX258_REG_Y_OUT_SIZE CCI_REG16(0x034e)
> +#define IMX258_REG_X_ADD_STA CCI_REG16(0x0344)
> +#define IMX258_REG_Y_ADD_STA CCI_REG16(0x0346)
> +#define IMX258_REG_X_ADD_END CCI_REG16(0x0348)
> +#define IMX258_REG_Y_ADD_END CCI_REG16(0x034a)
> +#define IMX258_REG_EXCK_FREQ CCI_REG16(0x0136)
> +#define IMX258_REG_CSI_DT_FMT CCI_REG16(0x0112)
> +#define IMX258_REG_LINE_LENGTH_PCK CCI_REG16(0x0342)
> +#define IMX258_REG_SCALE_M_EXT CCI_REG16(0x303a)
> +#define IMX258_REG_FRM_LENGTH_LINES CCI_REG16(0x0340)
> +#define IMX258_REG_FINE_INTEG_TIME CCI_REG8(0x0200)
> +#define IMX258_REG_PLL_IVT_MPY CCI_REG16(0x0306)
> +#define IMX258_REG_PLL_IOP_MPY CCI_REG16(0x030e)
> +#define IMX258_REG_REQ_LINK_BIT_RATE_MBPS_H CCI_REG16(0x0820)
> +#define IMX258_REG_REQ_LINK_BIT_RATE_MBPS_L CCI_REG16(0x0822)
>
> struct imx258_reg_list {
> u32 num_of_regs;
> - const struct imx258_reg *regs;
> + const struct cci_reg_sequence *regs;
> };
>
> struct imx258_link_cfg {
> @@ -143,329 +178,264 @@ struct imx258_mode {
> * To avoid further computation of clock settings, adopt the same per
> * lane data rate when using 2 lanes, thus allowing a maximum of 15fps.
> */
> -static const struct imx258_reg mipi_1267mbps_19_2mhz_2l[] = {
> - { 0x0136, 0x13 },
> - { 0x0137, 0x33 },
> - { 0x0301, 0x0A },
> - { 0x0303, 0x02 },
> - { 0x0305, 0x03 },
> - { 0x0306, 0x00 },
> - { 0x0307, 0xC6 },
> - { 0x0309, 0x0A },
> - { 0x030B, 0x01 },
> - { 0x030D, 0x02 },
> - { 0x030E, 0x00 },
> - { 0x030F, 0xD8 },
> - { 0x0310, 0x00 },
> -
> - { 0x0114, 0x01 },
> - { 0x0820, 0x09 },
> - { 0x0821, 0xa6 },
> - { 0x0822, 0x66 },
> - { 0x0823, 0x66 },
> +static const struct cci_reg_sequence mipi_1267mbps_19_2mhz_2l[] = {
> + { IMX258_REG_EXCK_FREQ, 0x1333 },
> + { IMX258_REG_IVTPXCK_DIV, 10 },
> + { IMX258_REG_IVTSYCK_DIV, 2 },
> + { IMX258_REG_PREPLLCK_VT_DIV, 3 },
> + { IMX258_REG_PLL_IVT_MPY, 198 },
> + { IMX258_REG_IOPPXCK_DIV, 10 },
> + { IMX258_REG_IOPSYCK_DIV, 1 },
> + { IMX258_REG_PREPLLCK_OP_DIV, 2 },
> + { IMX258_REG_PLL_IOP_MPY, 216 },
> + { IMX258_REG_PLL_MULT_DRIV, 0 },
> +
> + { IMX258_REG_CSI_LANE_MODE, 1 },
> + { IMX258_REG_REQ_LINK_BIT_RATE_MBPS_H, 1267 * 2 },
> + { IMX258_REG_REQ_LINK_BIT_RATE_MBPS_L, 0 },
> };
>
> -static const struct imx258_reg mipi_1267mbps_19_2mhz_4l[] = {
> - { 0x0136, 0x13 },
> - { 0x0137, 0x33 },
> - { 0x0301, 0x05 },
> - { 0x0303, 0x02 },
> - { 0x0305, 0x03 },
> - { 0x0306, 0x00 },
> - { 0x0307, 0xC6 },
> - { 0x0309, 0x0A },
> - { 0x030B, 0x01 },
> - { 0x030D, 0x02 },
> - { 0x030E, 0x00 },
> - { 0x030F, 0xD8 },
> - { 0x0310, 0x00 },
> -
> - { 0x0114, 0x03 },
> - { 0x0820, 0x13 },
> - { 0x0821, 0x4C },
> - { 0x0822, 0xCC },
> - { 0x0823, 0xCC },
> +static const struct cci_reg_sequence mipi_1267mbps_19_2mhz_4l[] = {
> + { IMX258_REG_EXCK_FREQ, 0x1333 },
> + { IMX258_REG_IVTPXCK_DIV, 5 },
> + { IMX258_REG_IVTSYCK_DIV, 2 },
> + { IMX258_REG_PREPLLCK_VT_DIV, 3 },
> + { IMX258_REG_PLL_IVT_MPY, 198 },
> + { IMX258_REG_IOPPXCK_DIV, 10 },
> + { IMX258_REG_IOPSYCK_DIV, 1 },
> + { IMX258_REG_PREPLLCK_OP_DIV, 2 },
> + { IMX258_REG_PLL_IOP_MPY, 216 },
> + { IMX258_REG_PLL_MULT_DRIV, 0 },
> +
> + { IMX258_REG_CSI_LANE_MODE, 3 },
> + { IMX258_REG_REQ_LINK_BIT_RATE_MBPS_H, 1267 * 4 },
> + { IMX258_REG_REQ_LINK_BIT_RATE_MBPS_L, 0 },
> };
>
> -static const struct imx258_reg mipi_1272mbps_24mhz_2l[] = {
> - { 0x0136, 0x18 },
> - { 0x0137, 0x00 },
> - { 0x0301, 0x0a },
> - { 0x0303, 0x02 },
> - { 0x0305, 0x04 },
> - { 0x0306, 0x00 },
> - { 0x0307, 0xD4 },
> - { 0x0309, 0x0A },
> - { 0x030B, 0x01 },
> - { 0x030D, 0x02 },
> - { 0x030E, 0x00 },
> - { 0x030F, 0xD8 },
> - { 0x0310, 0x00 },
> -
> - { 0x0114, 0x01 },
> - { 0x0820, 0x13 },
> - { 0x0821, 0x4C },
> - { 0x0822, 0xCC },
> - { 0x0823, 0xCC },
> +static const struct cci_reg_sequence mipi_1272mbps_24mhz_2l[] = {
> + { IMX258_REG_EXCK_FREQ, 0x1800 },
> + { IMX258_REG_IVTPXCK_DIV, 10 },
> + { IMX258_REG_IVTSYCK_DIV, 2 },
> + { IMX258_REG_PREPLLCK_VT_DIV, 4 },
> + { IMX258_REG_PLL_IVT_MPY, 212 },
> + { IMX258_REG_IOPPXCK_DIV, 10 },
> + { IMX258_REG_IOPSYCK_DIV, 1 },
> + { IMX258_REG_PREPLLCK_OP_DIV, 2 },
> + { IMX258_REG_PLL_IOP_MPY, 216 },
> + { IMX258_REG_PLL_MULT_DRIV, 0 },
> +
> + { IMX258_REG_CSI_LANE_MODE, 1 },
> + { IMX258_REG_REQ_LINK_BIT_RATE_MBPS_H, 1272 * 2 },
> + { IMX258_REG_REQ_LINK_BIT_RATE_MBPS_L, 0 },
> };
>
> -static const struct imx258_reg mipi_1272mbps_24mhz_4l[] = {
> - { 0x0136, 0x18 },
> - { 0x0137, 0x00 },
> - { 0x0301, 0x05 },
> - { 0x0303, 0x02 },
> - { 0x0305, 0x04 },
> - { 0x0306, 0x00 },
> - { 0x0307, 0xD4 },
> - { 0x0309, 0x0A },
> - { 0x030B, 0x01 },
> - { 0x030D, 0x02 },
> - { 0x030E, 0x00 },
> - { 0x030F, 0xD8 },
> - { 0x0310, 0x00 },
> -
> - { 0x0114, 0x03 },
> - { 0x0820, 0x13 },
> - { 0x0821, 0xE0 },
> - { 0x0822, 0x00 },
> - { 0x0823, 0x00 },
> +static const struct cci_reg_sequence mipi_1272mbps_24mhz_4l[] = {
> + { IMX258_REG_EXCK_FREQ, 0x1800 },
> + { IMX258_REG_IVTPXCK_DIV, 5 },
> + { IMX258_REG_IVTSYCK_DIV, 2 },
> + { IMX258_REG_PREPLLCK_VT_DIV, 4 },
> + { IMX258_REG_PLL_IVT_MPY, 212 },
> + { IMX258_REG_IOPPXCK_DIV, 10 },
> + { IMX258_REG_IOPSYCK_DIV, 1 },
> + { IMX258_REG_PREPLLCK_OP_DIV, 2 },
> + { IMX258_REG_PLL_IOP_MPY, 216 },
> + { IMX258_REG_PLL_MULT_DRIV, 0 },
> +
> + { IMX258_REG_CSI_LANE_MODE, 3 },
> + { IMX258_REG_REQ_LINK_BIT_RATE_MBPS_H, 1272 * 4 },
> + { IMX258_REG_REQ_LINK_BIT_RATE_MBPS_L, 0 },
> };
>
> -static const struct imx258_reg mipi_640mbps_19_2mhz_2l[] = {
> - { 0x0136, 0x13 },
> - { 0x0137, 0x33 },
> - { 0x0301, 0x05 },
> - { 0x0303, 0x02 },
> - { 0x0305, 0x03 },
> - { 0x0306, 0x00 },
> - { 0x0307, 0x64 },
> - { 0x0309, 0x0A },
> - { 0x030B, 0x01 },
> - { 0x030D, 0x02 },
> - { 0x030E, 0x00 },
> - { 0x030F, 0xD8 },
> - { 0x0310, 0x00 },
> -
> - { 0x0114, 0x01 },
> - { 0x0820, 0x05 },
> - { 0x0821, 0x00 },
> - { 0x0822, 0x00 },
> - { 0x0823, 0x00 },
> +static const struct cci_reg_sequence mipi_640mbps_19_2mhz_2l[] = {
> + { IMX258_REG_EXCK_FREQ, 0x1333 },
> + { IMX258_REG_IVTPXCK_DIV, 5 },
> + { IMX258_REG_IVTSYCK_DIV, 2 },
> + { IMX258_REG_PREPLLCK_VT_DIV, 3 },
> + { IMX258_REG_PLL_IVT_MPY, 100 },
> + { IMX258_REG_IOPPXCK_DIV, 10 },
> + { IMX258_REG_IOPSYCK_DIV, 1 },
> + { IMX258_REG_PREPLLCK_OP_DIV, 2 },
> + { IMX258_REG_PLL_IOP_MPY, 216 },
> + { IMX258_REG_PLL_MULT_DRIV, 0 },
> +
> + { IMX258_REG_CSI_LANE_MODE, 1 },
> + { IMX258_REG_REQ_LINK_BIT_RATE_MBPS_H, 640 * 2 },
> + { IMX258_REG_REQ_LINK_BIT_RATE_MBPS_L, 0 },
> };
>
> -static const struct imx258_reg mipi_640mbps_19_2mhz_4l[] = {
> - { 0x0136, 0x13 },
> - { 0x0137, 0x33 },
> - { 0x0301, 0x05 },
> - { 0x0303, 0x02 },
> - { 0x0305, 0x03 },
> - { 0x0306, 0x00 },
> - { 0x0307, 0x64 },
> - { 0x0309, 0x0A },
> - { 0x030B, 0x01 },
> - { 0x030D, 0x02 },
> - { 0x030E, 0x00 },
> - { 0x030F, 0xD8 },
> - { 0x0310, 0x00 },
> -
> - { 0x0114, 0x03 },
> - { 0x0820, 0x0A },
> - { 0x0821, 0x00 },
> - { 0x0822, 0x00 },
> - { 0x0823, 0x00 },
> +static const struct cci_reg_sequence mipi_640mbps_19_2mhz_4l[] = {
> + { IMX258_REG_EXCK_FREQ, 0x1333 },
> + { IMX258_REG_IVTPXCK_DIV, 5 },
> + { IMX258_REG_IVTSYCK_DIV, 2 },
> + { IMX258_REG_PREPLLCK_VT_DIV, 3 },
> + { IMX258_REG_PLL_IVT_MPY, 100 },
> + { IMX258_REG_IOPPXCK_DIV, 10 },
> + { IMX258_REG_IOPSYCK_DIV, 1 },
> + { IMX258_REG_PREPLLCK_OP_DIV, 2 },
> + { IMX258_REG_PLL_IOP_MPY, 216 },
> + { IMX258_REG_PLL_MULT_DRIV, 0 },
> +
> + { IMX258_REG_CSI_LANE_MODE, 3 },
> + { IMX258_REG_REQ_LINK_BIT_RATE_MBPS_H, 640 * 4 },
> + { IMX258_REG_REQ_LINK_BIT_RATE_MBPS_L, 0 },
> };
>
> -static const struct imx258_reg mipi_642mbps_24mhz_2l[] = {
> - { 0x0136, 0x18 },
> - { 0x0137, 0x00 },
> - { 0x0301, 0x05 },
> - { 0x0303, 0x02 },
> - { 0x0305, 0x04 },
> - { 0x0306, 0x00 },
> - { 0x0307, 0x6B },
> - { 0x0309, 0x0A },
> - { 0x030B, 0x01 },
> - { 0x030D, 0x02 },
> - { 0x030E, 0x00 },
> - { 0x030F, 0xD8 },
> - { 0x0310, 0x00 },
> -
> - { 0x0114, 0x01 },
> - { 0x0820, 0x0A },
> - { 0x0821, 0x00 },
> - { 0x0822, 0x00 },
> - { 0x0823, 0x00 },
> +static const struct cci_reg_sequence mipi_642mbps_24mhz_2l[] = {
> + { IMX258_REG_EXCK_FREQ, 0x1800 },
> + { IMX258_REG_IVTPXCK_DIV, 5 },
> + { IMX258_REG_IVTSYCK_DIV, 2 },
> + { IMX258_REG_PREPLLCK_VT_DIV, 4 },
> + { IMX258_REG_PLL_IVT_MPY, 107 },
> + { IMX258_REG_IOPPXCK_DIV, 10 },
> + { IMX258_REG_IOPSYCK_DIV, 1 },
> + { IMX258_REG_PREPLLCK_OP_DIV, 2 },
> + { IMX258_REG_PLL_IOP_MPY, 216 },
> + { IMX258_REG_PLL_MULT_DRIV, 0 },
> +
> + { IMX258_REG_CSI_LANE_MODE, 1 },
> + { IMX258_REG_REQ_LINK_BIT_RATE_MBPS_H, 642 * 2 },
> + { IMX258_REG_REQ_LINK_BIT_RATE_MBPS_L, 0 },
> };
>
> -static const struct imx258_reg mipi_642mbps_24mhz_4l[] = {
> - { 0x0136, 0x18 },
> - { 0x0137, 0x00 },
> - { 0x0301, 0x05 },
> - { 0x0303, 0x02 },
> - { 0x0305, 0x04 },
> - { 0x0306, 0x00 },
> - { 0x0307, 0x6B },
> - { 0x0309, 0x0A },
> - { 0x030B, 0x01 },
> - { 0x030D, 0x02 },
> - { 0x030E, 0x00 },
> - { 0x030F, 0xD8 },
> - { 0x0310, 0x00 },
> -
> - { 0x0114, 0x03 },
> - { 0x0820, 0x0A },
> - { 0x0821, 0x00 },
> - { 0x0822, 0x00 },
> - { 0x0823, 0x00 },
> +static const struct cci_reg_sequence mipi_642mbps_24mhz_4l[] = {
> + { IMX258_REG_EXCK_FREQ, 0x1800 },
> + { IMX258_REG_IVTPXCK_DIV, 5 },
> + { IMX258_REG_IVTSYCK_DIV, 2 },
> + { IMX258_REG_PREPLLCK_VT_DIV, 4 },
> + { IMX258_REG_PLL_IVT_MPY, 107 },
> + { IMX258_REG_IOPPXCK_DIV, 10 },
> + { IMX258_REG_IOPSYCK_DIV, 1 },
> + { IMX258_REG_PREPLLCK_OP_DIV, 2 },
> + { IMX258_REG_PLL_IOP_MPY, 216 },
> + { IMX258_REG_PLL_MULT_DRIV, 0 },
> +
> + { IMX258_REG_CSI_LANE_MODE, 3 },
> + { IMX258_REG_REQ_LINK_BIT_RATE_MBPS_H, 642 * 4 },
> + { IMX258_REG_REQ_LINK_BIT_RATE_MBPS_L, 0 },
> };
>
> -static const struct imx258_reg mode_common_regs[] = {
> - { 0x3051, 0x00 },
> - { 0x6B11, 0xCF },
> - { 0x7FF0, 0x08 },
> - { 0x7FF1, 0x0F },
> - { 0x7FF2, 0x08 },
> - { 0x7FF3, 0x1B },
> - { 0x7FF4, 0x23 },
> - { 0x7FF5, 0x60 },
> - { 0x7FF6, 0x00 },
> - { 0x7FF7, 0x01 },
> - { 0x7FF8, 0x00 },
> - { 0x7FF9, 0x78 },
> - { 0x7FFA, 0x00 },
> - { 0x7FFB, 0x00 },
> - { 0x7FFC, 0x00 },
> - { 0x7FFD, 0x00 },
> - { 0x7FFE, 0x00 },
> - { 0x7FFF, 0x03 },
> - { 0x7F76, 0x03 },
> - { 0x7F77, 0xFE },
> - { 0x7FA8, 0x03 },
> - { 0x7FA9, 0xFE },
> - { 0x7B24, 0x81 },
> - { 0x6564, 0x07 },
> - { 0x6B0D, 0x41 },
> - { 0x653D, 0x04 },
> - { 0x6B05, 0x8C },
> - { 0x6B06, 0xF9 },
> - { 0x6B08, 0x65 },
> - { 0x6B09, 0xFC },
> - { 0x6B0A, 0xCF },
> - { 0x6B0B, 0xD2 },
> - { 0x6700, 0x0E },
> - { 0x6707, 0x0E },
> - { 0x9104, 0x00 },
> - { 0x4648, 0x7F },
> - { 0x7420, 0x00 },
> - { 0x7421, 0x1C },
> - { 0x7422, 0x00 },
> - { 0x7423, 0xD7 },
> - { 0x5F04, 0x00 },
> - { 0x5F05, 0xED },
> - { 0x0112, 0x0A },
> - { 0x0113, 0x0A },
> - { 0x0342, 0x14 },
> - { 0x0343, 0xE8 },
> - { 0x0344, 0x00 },
> - { 0x0345, 0x00 },
> - { 0x0346, 0x00 },
> - { 0x0347, 0x00 },
> - { 0x0348, 0x10 },
> - { 0x0349, 0x6F },
> - { 0x034A, 0x0C },
> - { 0x034B, 0x2F },
> - { 0x0381, 0x01 },
> - { 0x0383, 0x01 },
> - { 0x0385, 0x01 },
> - { 0x0387, 0x01 },
> - { 0x0404, 0x00 },
> - { 0x0408, 0x00 },
> - { 0x0409, 0x00 },
> - { 0x040A, 0x00 },
> - { 0x040B, 0x00 },
> - { 0x040C, 0x10 },
> - { 0x040D, 0x70 },
> - { 0x3038, 0x00 },
> - { 0x303A, 0x00 },
> - { 0x303B, 0x10 },
> - { 0x300D, 0x00 },
> - { 0x0350, 0x00 },
> - { 0x0204, 0x00 },
> - { 0x0205, 0x00 },
> - { 0x020E, 0x01 },
> - { 0x020F, 0x00 },
> - { 0x0210, 0x01 },
> - { 0x0211, 0x00 },
> - { 0x0212, 0x01 },
> - { 0x0213, 0x00 },
> - { 0x0214, 0x01 },
> - { 0x0215, 0x00 },
> - { 0x7BCD, 0x00 },
> - { 0x94DC, 0x20 },
> - { 0x94DD, 0x20 },
> - { 0x94DE, 0x20 },
> - { 0x95DC, 0x20 },
> - { 0x95DD, 0x20 },
> - { 0x95DE, 0x20 },
> - { 0x7FB0, 0x00 },
> - { 0x9010, 0x3E },
> - { 0x9419, 0x50 },
> - { 0x941B, 0x50 },
> - { 0x9519, 0x50 },
> - { 0x951B, 0x50 },
> - { 0x3030, 0x00 },
> - { 0x3032, 0x00 },
> - { 0x0220, 0x00 },
> +static const struct cci_reg_sequence mode_common_regs[] = {
> + { CCI_REG8(0x3051), 0x00 },
> + { CCI_REG8(0x6B11), 0xCF },
> + { CCI_REG8(0x7FF0), 0x08 },
> + { CCI_REG8(0x7FF1), 0x0F },
> + { CCI_REG8(0x7FF2), 0x08 },
> + { CCI_REG8(0x7FF3), 0x1B },
> + { CCI_REG8(0x7FF4), 0x23 },
> + { CCI_REG8(0x7FF5), 0x60 },
> + { CCI_REG8(0x7FF6), 0x00 },
> + { CCI_REG8(0x7FF7), 0x01 },
> + { CCI_REG8(0x7FF8), 0x00 },
> + { CCI_REG8(0x7FF9), 0x78 },
> + { CCI_REG8(0x7FFA), 0x00 },
> + { CCI_REG8(0x7FFB), 0x00 },
> + { CCI_REG8(0x7FFC), 0x00 },
> + { CCI_REG8(0x7FFD), 0x00 },
> + { CCI_REG8(0x7FFE), 0x00 },
> + { CCI_REG8(0x7FFF), 0x03 },
> + { CCI_REG8(0x7F76), 0x03 },
> + { CCI_REG8(0x7F77), 0xFE },
> + { CCI_REG8(0x7FA8), 0x03 },
> + { CCI_REG8(0x7FA9), 0xFE },
> + { CCI_REG8(0x7B24), 0x81 },
> + { CCI_REG8(0x6564), 0x07 },
> + { CCI_REG8(0x6B0D), 0x41 },
> + { CCI_REG8(0x653D), 0x04 },
> + { CCI_REG8(0x6B05), 0x8C },
> + { CCI_REG8(0x6B06), 0xF9 },
> + { CCI_REG8(0x6B08), 0x65 },
> + { CCI_REG8(0x6B09), 0xFC },
> + { CCI_REG8(0x6B0A), 0xCF },
> + { CCI_REG8(0x6B0B), 0xD2 },
> + { CCI_REG8(0x6700), 0x0E },
> + { CCI_REG8(0x6707), 0x0E },
> + { CCI_REG8(0x9104), 0x00 },
> + { CCI_REG8(0x4648), 0x7F },
> + { CCI_REG8(0x7420), 0x00 },
> + { CCI_REG8(0x7421), 0x1C },
> + { CCI_REG8(0x7422), 0x00 },
> + { CCI_REG8(0x7423), 0xD7 },
> + { CCI_REG8(0x5F04), 0x00 },
> + { CCI_REG8(0x5F05), 0xED },
> + {IMX258_REG_CSI_DT_FMT, 0x0a0a},
> + {IMX258_REG_LINE_LENGTH_PCK, 5352},
> + {IMX258_REG_X_ADD_STA, 0},
> + {IMX258_REG_Y_ADD_STA, 0},
> + {IMX258_REG_X_ADD_END, 4207},
> + {IMX258_REG_Y_ADD_END, 3119},
> + {IMX258_REG_X_EVN_INC, 1},
> + {IMX258_REG_X_ODD_INC, 1},
> + {IMX258_REG_Y_EVN_INC, 1},
> + {IMX258_REG_Y_ODD_INC, 1},
> + {IMX258_REG_DIG_CROP_X_OFFSET, 0},
> + {IMX258_REG_DIG_CROP_Y_OFFSET, 0},
> + {IMX258_REG_DIG_CROP_IMAGE_WIDTH, 4208},
> + {IMX258_REG_SCALE_MODE_EXT, 0},
> + {IMX258_REG_SCALE_M_EXT, 16},
> + {IMX258_REG_FORCE_FD_SUM, 0},
> + {IMX258_REG_FRM_LENGTH_CTL, 0},
> + {IMX258_REG_ANALOG_GAIN, 0},
> + {IMX258_REG_GR_DIGITAL_GAIN, 256},
> + {IMX258_REG_R_DIGITAL_GAIN, 256},
> + {IMX258_REG_B_DIGITAL_GAIN, 256},
> + {IMX258_REG_GB_DIGITAL_GAIN, 256},
> + {IMX258_REG_AF_WINDOW_MODE, 0},
> + { CCI_REG8(0x94DC), 0x20 },
> + { CCI_REG8(0x94DD), 0x20 },
> + { CCI_REG8(0x94DE), 0x20 },
> + { CCI_REG8(0x95DC), 0x20 },
> + { CCI_REG8(0x95DD), 0x20 },
> + { CCI_REG8(0x95DE), 0x20 },
> + { CCI_REG8(0x7FB0), 0x00 },
> + { CCI_REG8(0x9010), 0x3E },
> + { CCI_REG8(0x9419), 0x50 },
> + { CCI_REG8(0x941B), 0x50 },
> + { CCI_REG8(0x9519), 0x50 },
> + { CCI_REG8(0x951B), 0x50 },
> + {IMX258_REG_PHASE_PIX_OUTEN, 0},
> + {IMX258_REG_PDPIX_DATA_RATE, 0},
> + {IMX258_REG_HDR, 0},
> };
>
> -static const struct imx258_reg mode_4208x3120_regs[] = {
> - { 0x0900, 0x00 },
> - { 0x0901, 0x11 },
> - { 0x0401, 0x00 },
> - { 0x0405, 0x10 },
> - { 0x040E, 0x0C },
> - { 0x040F, 0x30 },
> - { 0x034C, 0x10 },
> - { 0x034D, 0x70 },
> - { 0x034E, 0x0C },
> - { 0x034F, 0x30 },
> +static const struct cci_reg_sequence mode_4208x3120_regs[] = {
> + {IMX258_REG_BINNING_MODE, 0},
> + {IMX258_REG_BINNING_TYPE_V, 0x11},
> + {IMX258_REG_SCALE_MODE, 0},
> + {IMX258_REG_SCALE_M, 16},
> + {IMX258_REG_DIG_CROP_IMAGE_HEIGHT, 3120},
> + {IMX258_REG_X_OUT_SIZE, 4208},
> + {IMX258_REG_Y_OUT_SIZE, 3120},
> };
>
> -static const struct imx258_reg mode_2104_1560_regs[] = {
> - { 0x0900, 0x01 },
> - { 0x0901, 0x12 },
> - { 0x0401, 0x01 },
> - { 0x0405, 0x20 },
> - { 0x040E, 0x06 },
> - { 0x040F, 0x18 },
> - { 0x034C, 0x08 },
> - { 0x034D, 0x38 },
> - { 0x034E, 0x06 },
> - { 0x034F, 0x18 },
> +static const struct cci_reg_sequence mode_2104_1560_regs[] = {
> + {IMX258_REG_BINNING_MODE, 1},
> + {IMX258_REG_BINNING_TYPE_V, 0x12},
> + {IMX258_REG_SCALE_MODE, 1},
> + {IMX258_REG_SCALE_M, 32},
> + {IMX258_REG_DIG_CROP_IMAGE_HEIGHT, 1560},
> + {IMX258_REG_X_OUT_SIZE, 2104},
> + {IMX258_REG_Y_OUT_SIZE, 1560},
> };
>
> -static const struct imx258_reg mode_1048_780_regs[] = {
> - { 0x0900, 0x01 },
> - { 0x0901, 0x14 },
> - { 0x0401, 0x01 },
> - { 0x0405, 0x40 },
> - { 0x040E, 0x03 },
> - { 0x040F, 0x0C },
> - { 0x034C, 0x04 },
> - { 0x034D, 0x18 },
> - { 0x034E, 0x03 },
> - { 0x034F, 0x0C },
> +static const struct cci_reg_sequence mode_1048_780_regs[] = {
> + {IMX258_REG_BINNING_MODE, 1},
> + {IMX258_REG_BINNING_TYPE_V, 0x14},
> + {IMX258_REG_SCALE_MODE, 1},
> + {IMX258_REG_SCALE_M, 64},
> + {IMX258_REG_DIG_CROP_IMAGE_HEIGHT, 780},
> + {IMX258_REG_X_OUT_SIZE, 1048},
> + {IMX258_REG_Y_OUT_SIZE, 780},
> };
>
> struct imx258_variant_cfg {
> - const struct imx258_reg *regs;
> + const struct cci_reg_sequence *regs;
> unsigned int num_regs;
> };
>
> -static const struct imx258_reg imx258_cfg_regs[] = {
> - { 0x3052, 0x00 },
> - { 0x4E21, 0x14 },
> - { 0x7B25, 0x00 },
> +static const struct cci_reg_sequence imx258_cfg_regs[] = {
> + { CCI_REG8(0x3052), 0x00 },
> + { CCI_REG8(0x4E21), 0x14 },
> + { CCI_REG8(0x7B25), 0x00 },
> };
>
> static const struct imx258_variant_cfg imx258_cfg = {
> @@ -473,10 +443,10 @@ static const struct imx258_variant_cfg imx258_cfg = {
> .num_regs = ARRAY_SIZE(imx258_cfg_regs),
> };
>
> -static const struct imx258_reg imx258_pdaf_cfg_regs[] = {
> - { 0x3052, 0x01 },
> - { 0x4E21, 0x10 },
> - { 0x7B25, 0x01 },
> +static const struct cci_reg_sequence imx258_pdaf_cfg_regs[] = {
> + { CCI_REG8(0x3052), 0x01 },
> + { CCI_REG8(0x4E21), 0x10 },
> + { CCI_REG8(0x7B25), 0x01 },
> };
>
> static const struct imx258_variant_cfg imx258_pdaf_cfg = {
> @@ -677,6 +647,7 @@ static const struct imx258_mode supported_modes[] = {
> struct imx258 {
> struct v4l2_subdev sd;
> struct media_pad pad;
> + struct regmap *regmap;
>
> const struct imx258_variant_cfg *variant_cfg;
>
> @@ -717,80 +688,6 @@ static inline struct imx258 *to_imx258(struct v4l2_subdev *_sd)
> return container_of(_sd, struct imx258, sd);
> }
>
> -/* Read registers up to 2 at a time */
> -static int imx258_read_reg(struct imx258 *imx258, u16 reg, u32 len, u32 *val)
> -{
> - struct i2c_client *client = v4l2_get_subdevdata(&imx258->sd);
> - struct i2c_msg msgs[2];
> - u8 addr_buf[2] = { reg >> 8, reg & 0xff };
> - u8 data_buf[4] = { 0, };
> - int ret;
> -
> - if (len > 4)
> - return -EINVAL;
> -
> - /* Write register address */
> - msgs[0].addr = client->addr;
> - msgs[0].flags = 0;
> - msgs[0].len = ARRAY_SIZE(addr_buf);
> - msgs[0].buf = addr_buf;
> -
> - /* Read data from register */
> - msgs[1].addr = client->addr;
> - msgs[1].flags = I2C_M_RD;
> - msgs[1].len = len;
> - msgs[1].buf = &data_buf[4 - len];
> -
> - ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
> - if (ret != ARRAY_SIZE(msgs))
> - return -EIO;
> -
> - *val = get_unaligned_be32(data_buf);
> -
> - return 0;
> -}
> -
> -/* Write registers up to 2 at a time */
> -static int imx258_write_reg(struct imx258 *imx258, u16 reg, u32 len, u32 val)
> -{
> - struct i2c_client *client = v4l2_get_subdevdata(&imx258->sd);
> - u8 buf[6];
> -
> - if (len > 4)
> - return -EINVAL;
> -
> - put_unaligned_be16(reg, buf);
> - put_unaligned_be32(val << (8 * (4 - len)), buf + 2);
> - if (i2c_master_send(client, buf, len + 2) != len + 2)
> - return -EIO;
> -
> - return 0;
> -}
> -
> -/* Write a list of registers */
> -static int imx258_write_regs(struct imx258 *imx258,
> - const struct imx258_reg *regs, u32 len)
> -{
> - struct i2c_client *client = v4l2_get_subdevdata(&imx258->sd);
> - unsigned int i;
> - int ret;
> -
> - for (i = 0; i < len; i++) {
> - ret = imx258_write_reg(imx258, regs[i].address, 1,
> - regs[i].val);
> - if (ret) {
> - dev_err_ratelimited(
> - &client->dev,
> - "Failed to write reg 0x%4.4x. error = %d\n",
> - regs[i].address, ret);
> -
> - return ret;
> - }
> - }
> -
> - return 0;
> -}
> -
> /* Get bayer order based on flip setting. */
> static u32 imx258_get_format_code(const struct imx258 *imx258)
> {
> @@ -828,28 +725,20 @@ static int imx258_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
> return 0;
> }
>
> -static int imx258_update_digital_gain(struct imx258 *imx258, u32 len, u32 val)
> +static int imx258_update_digital_gain(struct imx258 *imx258, u32 val)
> {
> int ret;
>
> - ret = imx258_write_reg(imx258, IMX258_REG_GR_DIGITAL_GAIN,
> - IMX258_REG_VALUE_16BIT,
> - val);
> + ret = cci_write(imx258->regmap, IMX258_REG_GR_DIGITAL_GAIN, val, NULL);
> if (ret)
> return ret;
> - ret = imx258_write_reg(imx258, IMX258_REG_GB_DIGITAL_GAIN,
> - IMX258_REG_VALUE_16BIT,
> - val);
> + ret = cci_write(imx258->regmap, IMX258_REG_GB_DIGITAL_GAIN, val, NULL);
> if (ret)
> return ret;
> - ret = imx258_write_reg(imx258, IMX258_REG_R_DIGITAL_GAIN,
> - IMX258_REG_VALUE_16BIT,
> - val);
> + ret = cci_write(imx258->regmap, IMX258_REG_R_DIGITAL_GAIN, val, NULL);
> if (ret)
> return ret;
> - ret = imx258_write_reg(imx258, IMX258_REG_B_DIGITAL_GAIN,
> - IMX258_REG_VALUE_16BIT,
> - val);
> + ret = cci_write(imx258->regmap, IMX258_REG_B_DIGITAL_GAIN, val, NULL);
> if (ret)
> return ret;
> return 0;

What about reducing the usage of the "if (ret) return ret;" pattern?
You can:

int ret = 0;

cci_write(imx258->regmap, IMX258_REG_GR_DIGITAL_GAIN, val, &ret);
cci_write(imx258->regmap, IMX258_REG_GB_DIGITAL_GAIN, val, &ret);
cci_write(imx258->regmap, IMX258_REG_R_DIGITAL_GAIN, val, &ret);
cci_write(imx258->regmap, IMX258_REG_B_DIGITAL_GAIN, val, &ret);

return ret;

What do you think?

> @@ -891,53 +780,45 @@ static int imx258_set_ctrl(struct v4l2_ctrl *ctrl)
>
> switch (ctrl->id) {
> case V4L2_CID_ANALOGUE_GAIN:
> - ret = imx258_write_reg(imx258, IMX258_REG_ANALOG_GAIN,
> - IMX258_REG_VALUE_16BIT,
> - ctrl->val);
> + ret = cci_write(imx258->regmap, IMX258_REG_ANALOG_GAIN,
> + ctrl->val, NULL);
> break;
> case V4L2_CID_EXPOSURE:
> - ret = imx258_write_reg(imx258, IMX258_REG_EXPOSURE,
> - IMX258_REG_VALUE_16BIT,
> - ctrl->val);
> + ret = cci_write(imx258->regmap, IMX258_REG_EXPOSURE,
> + ctrl->val, NULL);
> break;
> case V4L2_CID_DIGITAL_GAIN:
> - ret = imx258_update_digital_gain(imx258, IMX258_REG_VALUE_16BIT,
> - ctrl->val);
> + ret = imx258_update_digital_gain(imx258, ctrl->val);
> break;
> case V4L2_CID_TEST_PATTERN:
> - ret = imx258_write_reg(imx258, IMX258_REG_TEST_PATTERN,
> - IMX258_REG_VALUE_16BIT,
> - ctrl->val);
> + ret = cci_write(imx258->regmap, IMX258_REG_TEST_PATTERN,
> + ctrl->val, NULL);
> break;
> case V4L2_CID_WIDE_DYNAMIC_RANGE:
> if (!ctrl->val) {
> - ret = imx258_write_reg(imx258, IMX258_REG_HDR,
> - IMX258_REG_VALUE_08BIT,
> - IMX258_HDR_RATIO_MIN);
> + ret = cci_write(imx258->regmap, IMX258_REG_HDR,
> + IMX258_HDR_RATIO_MIN, NULL);
> } else {
> - ret = imx258_write_reg(imx258, IMX258_REG_HDR,
> - IMX258_REG_VALUE_08BIT,
> - IMX258_HDR_ON);
> + ret = cci_write(imx258->regmap, IMX258_REG_HDR,
> + IMX258_HDR_ON, NULL);
> if (ret)
> break;
> - ret = imx258_write_reg(imx258, IMX258_REG_HDR_RATIO,
> - IMX258_REG_VALUE_08BIT,
> - BIT(IMX258_HDR_RATIO_MAX));
> + ret = cci_write(imx258->regmap, IMX258_REG_HDR_RATIO,
> + BIT(IMX258_HDR_RATIO_MAX), NULL);
> }
> break;
> case V4L2_CID_VBLANK:
> - ret = imx258_write_reg(imx258, IMX258_REG_VTS,
> - IMX258_REG_VALUE_16BIT,
> - imx258->cur_mode->height + ctrl->val);
> + ret = cci_write(imx258->regmap, IMX258_REG_FRM_LENGTH_LINES,
> + imx258->cur_mode->height + ctrl->val, NULL);
> break;
> case V4L2_CID_VFLIP:
> case V4L2_CID_HFLIP:
> - ret = imx258_write_reg(imx258, REG_MIRROR_FLIP_CONTROL,
> - IMX258_REG_VALUE_08BIT,
> - (imx258->hflip->val ?
> - REG_CONFIG_MIRROR_HFLIP : 0) |
> - (imx258->vflip->val ?
> - REG_CONFIG_MIRROR_VFLIP : 0));
> + ret = cci_write(imx258->regmap, REG_MIRROR_FLIP_CONTROL,
> + (imx258->hflip->val ?
> + REG_CONFIG_MIRROR_HFLIP : 0) |
> + (imx258->vflip->val ?
> + REG_CONFIG_MIRROR_VFLIP : 0),
> + NULL);
> break;
> default:
> dev_info(&client->dev,
> @@ -1147,8 +1028,7 @@ static int imx258_start_streaming(struct imx258 *imx258)
> const struct imx258_link_freq_config *link_freq_cfg;
> int ret, link_freq_index;
>
> - ret = imx258_write_reg(imx258, IMX258_REG_RESET, IMX258_REG_VALUE_08BIT,
> - 0x01);
> + ret = cci_write(imx258->regmap, IMX258_REG_RESET, 0x01, NULL);
> if (ret) {
> dev_err(&client->dev, "%s failed to reset sensor\n", __func__);
> return ret;
> @@ -1162,30 +1042,30 @@ static int imx258_start_streaming(struct imx258 *imx258)
> link_freq_cfg = &imx258->link_freq_configs[link_freq_index];
>
> reg_list = &link_freq_cfg->link_cfg[imx258->lane_mode_idx].reg_list;
> - ret = imx258_write_regs(imx258, reg_list->regs, reg_list->num_of_regs);
> + ret = cci_multi_reg_write(imx258->regmap, reg_list->regs, reg_list->num_of_regs, NULL);
> if (ret) {
> dev_err(&client->dev, "%s failed to set plls\n", __func__);
> return ret;
> }
>
> - ret = imx258_write_regs(imx258, mode_common_regs,
> - ARRAY_SIZE(mode_common_regs));
> + ret = cci_multi_reg_write(imx258->regmap, mode_common_regs,
> + ARRAY_SIZE(mode_common_regs), NULL);
> if (ret) {
> dev_err(&client->dev, "%s failed to set common regs\n", __func__);
> return ret;
> }
>
> - ret = imx258_write_regs(imx258, imx258->variant_cfg->regs,
> - imx258->variant_cfg->num_regs);
> + ret = cci_multi_reg_write(imx258->regmap, imx258->variant_cfg->regs,
> + imx258->variant_cfg->num_regs, NULL);
> if (ret) {
> dev_err(&client->dev, "%s failed to set variant config\n",
> __func__);
> return ret;
> }
>
> - ret = imx258_write_reg(imx258, IMX258_CLK_BLANK_STOP,
> - IMX258_REG_VALUE_08BIT,
> - !!(imx258->csi2_flags & V4L2_MBUS_CSI2_NONCONTINUOUS_CLOCK));
> + ret = cci_write(imx258->regmap, IMX258_CLK_BLANK_STOP,
> + !!(imx258->csi2_flags & V4L2_MBUS_CSI2_NONCONTINUOUS_CLOCK),
> + NULL);
> if (ret) {
> dev_err(&client->dev, "%s failed to set clock lane mode\n", __func__);
> return ret;
> @@ -1193,7 +1073,7 @@ static int imx258_start_streaming(struct imx258 *imx258)
>
> /* Apply default values of current mode */
> reg_list = &imx258->cur_mode->reg_list;
> - ret = imx258_write_regs(imx258, reg_list->regs, reg_list->num_of_regs);
> + ret = cci_multi_reg_write(imx258->regmap, reg_list->regs, reg_list->num_of_regs, NULL);
> if (ret) {
> dev_err(&client->dev, "%s failed to set mode\n", __func__);
> return ret;
> @@ -1205,9 +1085,8 @@ static int imx258_start_streaming(struct imx258 *imx258)
> return ret;
>
> /* set stream on register */
> - return imx258_write_reg(imx258, IMX258_REG_MODE_SELECT,
> - IMX258_REG_VALUE_08BIT,
> - IMX258_MODE_STREAMING);
> + return cci_write(imx258->regmap, IMX258_REG_MODE_SELECT,
> + IMX258_MODE_STREAMING, NULL);
> }
>
> /* Stop streaming */
> @@ -1217,8 +1096,8 @@ static int imx258_stop_streaming(struct imx258 *imx258)
> int ret;
>
> /* set stream off register */
> - ret = imx258_write_reg(imx258, IMX258_REG_MODE_SELECT,
> - IMX258_REG_VALUE_08BIT, IMX258_MODE_STANDBY);
> + ret = cci_write(imx258->regmap, IMX258_REG_MODE_SELECT,
> + IMX258_MODE_STANDBY, NULL);
> if (ret)
> dev_err(&client->dev, "%s failed to set stream\n", __func__);
>
> @@ -1316,10 +1195,10 @@ static int imx258_identify_module(struct imx258 *imx258)
> {
> struct i2c_client *client = v4l2_get_subdevdata(&imx258->sd);
> int ret;
> - u32 val;
> + u64 val;
>
> - ret = imx258_read_reg(imx258, IMX258_REG_CHIP_ID,
> - IMX258_REG_VALUE_16BIT, &val);
> + ret = cci_read(imx258->regmap, IMX258_REG_CHIP_ID,
> + &val, NULL);
> if (ret) {
> dev_err(&client->dev, "failed to read chip id %x\n",
> IMX258_CHIP_ID);
> @@ -1327,7 +1206,7 @@ static int imx258_identify_module(struct imx258 *imx258)
> }
>
> if (val != IMX258_CHIP_ID) {
> - dev_err(&client->dev, "chip id mismatch: %x!=%x\n",
> + dev_err(&client->dev, "chip id mismatch: %x!=%llx\n",
> IMX258_CHIP_ID, val);
> return -EIO;
> }
> @@ -1507,6 +1386,13 @@ static int imx258_probe(struct i2c_client *client)
> if (!imx258)
> return -ENOMEM;
>
> + imx258->regmap = devm_cci_regmap_init_i2c(client, 16);
> + if (IS_ERR(imx258->regmap)) {
> + ret = PTR_ERR(imx258->regmap);
> + dev_err(&client->dev, "failed to initialize CCI: %d\n", ret);
> + return ret;
> + }
> +
> ret = imx258_get_regulators(imx258, client);
> if (ret)
> return dev_err_probe(&client->dev, ret,
> --
> 2.44.0

The rest looks good to me.
Reviewed-by: Tommaso Merciai <tomm.merciai@gmail.com>

Thanks & Regards,
Tommaso

>
>