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linux-stable/drivers/media/i2c/imx290.c
Laurent Pinchart 05ef7ec49d media: i2c: imx290: Handle error from imx290_set_data_lanes() 
Check the error status returned by imx290_set_data_lanes() in its
caller and propagate it.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Alexander Stein <alexander.stein@ew.tq-group.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
2023-02-03 15:06:11 +01:00

1375 lines
37 KiB
C
Raw Blame History

// SPDX-License-Identifier: GPL-2.0
/*
* Sony IMX290 CMOS Image Sensor Driver
*
* Copyright (C) 2019 FRAMOS GmbH.
*
* Copyright (C) 2019 Linaro Ltd.
* Author: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
*/
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/gpio/consumer.h>
#include <linux/i2c.h>
#include <linux/module.h>
#include <linux/pm_runtime.h>
#include <linux/regmap.h>
#include <linux/regulator/consumer.h>
#include <media/media-entity.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-device.h>
#include <media/v4l2-fwnode.h>
#include <media/v4l2-subdev.h>
#define IMX290_REG_SIZE_SHIFT 16
#define IMX290_REG_ADDR_MASK 0xffff
#define IMX290_REG_8BIT(n) ((1U << IMX290_REG_SIZE_SHIFT) | (n))
#define IMX290_REG_16BIT(n) ((2U << IMX290_REG_SIZE_SHIFT) | (n))
#define IMX290_REG_24BIT(n) ((3U << IMX290_REG_SIZE_SHIFT) | (n))
#define IMX290_STANDBY IMX290_REG_8BIT(0x3000)
#define IMX290_REGHOLD IMX290_REG_8BIT(0x3001)
#define IMX290_XMSTA IMX290_REG_8BIT(0x3002)
#define IMX290_ADBIT IMX290_REG_8BIT(0x3005)
#define IMX290_ADBIT_10BIT (0 << 0)
#define IMX290_ADBIT_12BIT (1 << 0)
#define IMX290_CTRL_07 IMX290_REG_8BIT(0x3007)
#define IMX290_VREVERSE BIT(0)
#define IMX290_HREVERSE BIT(1)
#define IMX290_WINMODE_1080P (0 << 4)
#define IMX290_WINMODE_720P (1 << 4)
#define IMX290_WINMODE_CROP (4 << 4)
#define IMX290_FR_FDG_SEL IMX290_REG_8BIT(0x3009)
#define IMX290_BLKLEVEL IMX290_REG_16BIT(0x300a)
#define IMX290_GAIN IMX290_REG_8BIT(0x3014)
#define IMX290_VMAX IMX290_REG_24BIT(0x3018)
#define IMX290_HMAX IMX290_REG_16BIT(0x301c)
#define IMX290_SHS1 IMX290_REG_24BIT(0x3020)
#define IMX290_WINWV_OB IMX290_REG_8BIT(0x303a)
#define IMX290_WINPV IMX290_REG_16BIT(0x303c)
#define IMX290_WINWV IMX290_REG_16BIT(0x303e)
#define IMX290_WINPH IMX290_REG_16BIT(0x3040)
#define IMX290_WINWH IMX290_REG_16BIT(0x3042)
#define IMX290_OUT_CTRL IMX290_REG_8BIT(0x3046)
#define IMX290_ODBIT_10BIT (0 << 0)
#define IMX290_ODBIT_12BIT (1 << 0)
#define IMX290_OPORTSEL_PARALLEL (0x0 << 4)
#define IMX290_OPORTSEL_LVDS_2CH (0xd << 4)
#define IMX290_OPORTSEL_LVDS_4CH (0xe << 4)
#define IMX290_OPORTSEL_LVDS_8CH (0xf << 4)
#define IMX290_XSOUTSEL IMX290_REG_8BIT(0x304b)
#define IMX290_XSOUTSEL_XVSOUTSEL_HIGH (0 << 0)
#define IMX290_XSOUTSEL_XVSOUTSEL_VSYNC (2 << 0)
#define IMX290_XSOUTSEL_XHSOUTSEL_HIGH (0 << 2)
#define IMX290_XSOUTSEL_XHSOUTSEL_HSYNC (2 << 2)
#define IMX290_INCKSEL1 IMX290_REG_8BIT(0x305c)
#define IMX290_INCKSEL2 IMX290_REG_8BIT(0x305d)
#define IMX290_INCKSEL3 IMX290_REG_8BIT(0x305e)
#define IMX290_INCKSEL4 IMX290_REG_8BIT(0x305f)
#define IMX290_PGCTRL IMX290_REG_8BIT(0x308c)
#define IMX290_ADBIT1 IMX290_REG_8BIT(0x3129)
#define IMX290_ADBIT1_10BIT 0x1d
#define IMX290_ADBIT1_12BIT 0x00
#define IMX290_INCKSEL5 IMX290_REG_8BIT(0x315e)
#define IMX290_INCKSEL6 IMX290_REG_8BIT(0x3164)
#define IMX290_ADBIT2 IMX290_REG_8BIT(0x317c)
#define IMX290_ADBIT2_10BIT 0x12
#define IMX290_ADBIT2_12BIT 0x00
#define IMX290_CHIP_ID IMX290_REG_16BIT(0x319a)
#define IMX290_ADBIT3 IMX290_REG_8BIT(0x31ec)
#define IMX290_ADBIT3_10BIT 0x37
#define IMX290_ADBIT3_12BIT 0x0e
#define IMX290_REPETITION IMX290_REG_8BIT(0x3405)
#define IMX290_PHY_LANE_NUM IMX290_REG_8BIT(0x3407)
#define IMX290_OPB_SIZE_V IMX290_REG_8BIT(0x3414)
#define IMX290_Y_OUT_SIZE IMX290_REG_16BIT(0x3418)
#define IMX290_CSI_DT_FMT IMX290_REG_16BIT(0x3441)
#define IMX290_CSI_DT_FMT_RAW10 0x0a0a
#define IMX290_CSI_DT_FMT_RAW12 0x0c0c
#define IMX290_CSI_LANE_MODE IMX290_REG_8BIT(0x3443)
#define IMX290_EXTCK_FREQ IMX290_REG_16BIT(0x3444)
#define IMX290_TCLKPOST IMX290_REG_16BIT(0x3446)
#define IMX290_THSZERO IMX290_REG_16BIT(0x3448)
#define IMX290_THSPREPARE IMX290_REG_16BIT(0x344a)
#define IMX290_TCLKTRAIL IMX290_REG_16BIT(0x344c)
#define IMX290_THSTRAIL IMX290_REG_16BIT(0x344e)
#define IMX290_TCLKZERO IMX290_REG_16BIT(0x3450)
#define IMX290_TCLKPREPARE IMX290_REG_16BIT(0x3452)
#define IMX290_TLPX IMX290_REG_16BIT(0x3454)
#define IMX290_X_OUT_SIZE IMX290_REG_16BIT(0x3472)
#define IMX290_PGCTRL_REGEN BIT(0)
#define IMX290_PGCTRL_THRU BIT(1)
#define IMX290_PGCTRL_MODE(n) ((n) << 4)
#define IMX290_VMAX_DEFAULT 1125
/*
* The IMX290 pixel array is organized as follows:
*
* +------------------------------------+
* | Optical Black | } Vertical effective optical black (10)
* +---+------------------------------------+---+
* | | | | } Effective top margin (8)
* | | +----------------------------+ | | \
* | | | | | | |
* | | | | | | |
* | | | | | | |
* | | | Recording Pixel Area | | | | Recommended height (1080)
* | | | | | | |
* | | | | | | |
* | | | | | | |
* | | +----------------------------+ | | /
* | | | | } Effective bottom margin (9)
* +---+------------------------------------+---+
* <-> <-> <--------------------------> <-> <->
* \---- Ignored right margin (4)
* \-------- Effective right margin (9)
* \------------------------- Recommended width (1920)
* \----------------------------------------- Effective left margin (8)
* \--------------------------------------------- Ignored left margin (4)
*
* The optical black lines are output over CSI-2 with a separate data type.
*
* The pixel array is meant to have 1920x1080 usable pixels after image
* processing in an ISP. It has 8 (9) extra active pixels usable for color
* processing in the ISP on the top and left (bottom and right) sides of the
* image. In addition, 4 additional pixels are present on the left and right
* sides of the image, documented as "ignored area".
*
* As far as is understood, all pixels of the pixel array (ignored area, color
* processing margins and recording area) can be output by the sensor.
*/
#define IMX290_PIXEL_ARRAY_WIDTH 1945
#define IMX290_PIXEL_ARRAY_HEIGHT 1097
#define IMX920_PIXEL_ARRAY_MARGIN_LEFT 12
#define IMX920_PIXEL_ARRAY_MARGIN_RIGHT 13
#define IMX920_PIXEL_ARRAY_MARGIN_TOP 8
#define IMX920_PIXEL_ARRAY_MARGIN_BOTTOM 9
#define IMX290_PIXEL_ARRAY_RECORDING_WIDTH 1920
#define IMX290_PIXEL_ARRAY_RECORDING_HEIGHT 1080
/* Equivalent value for 16bpp */
#define IMX290_BLACK_LEVEL_DEFAULT 3840
#define IMX290_NUM_SUPPLIES 3
struct imx290_regval {
u32 reg;
u32 val;
};
struct imx290_mode {
u32 width;
u32 height;
u32 hmax;
u8 link_freq_index;
const struct imx290_regval *data;
u32 data_size;
};
struct imx290 {
struct device *dev;
struct clk *xclk;
struct regmap *regmap;
u8 nlanes;
struct v4l2_subdev sd;
struct media_pad pad;
const struct imx290_mode *current_mode;
struct regulator_bulk_data supplies[IMX290_NUM_SUPPLIES];
struct gpio_desc *rst_gpio;
struct v4l2_ctrl_handler ctrls;
struct v4l2_ctrl *link_freq;
struct v4l2_ctrl *pixel_rate;
struct v4l2_ctrl *hblank;
struct v4l2_ctrl *vblank;
};
static inline struct imx290 *to_imx290(struct v4l2_subdev *_sd)
{
return container_of(_sd, struct imx290, sd);
}
/* -----------------------------------------------------------------------------
* Modes and formats
*/
static const struct imx290_regval imx290_global_init_settings[] = {
{ IMX290_CTRL_07, IMX290_WINMODE_1080P },
{ IMX290_VMAX, IMX290_VMAX_DEFAULT },
{ IMX290_EXTCK_FREQ, 0x2520 },
{ IMX290_WINWV_OB, 12 },
{ IMX290_WINPH, 0 },
{ IMX290_WINPV, 0 },
{ IMX290_WINWH, 1948 },
{ IMX290_WINWV, 1097 },
{ IMX290_XSOUTSEL, IMX290_XSOUTSEL_XVSOUTSEL_VSYNC |
IMX290_XSOUTSEL_XHSOUTSEL_HSYNC },
{ IMX290_REG_8BIT(0x300f), 0x00 },
{ IMX290_REG_8BIT(0x3010), 0x21 },
{ IMX290_REG_8BIT(0x3012), 0x64 },
{ IMX290_REG_8BIT(0x3013), 0x00 },
{ IMX290_REG_8BIT(0x3016), 0x09 },
{ IMX290_REG_8BIT(0x3070), 0x02 },
{ IMX290_REG_8BIT(0x3071), 0x11 },
{ IMX290_REG_8BIT(0x309b), 0x10 },
{ IMX290_REG_8BIT(0x309c), 0x22 },
{ IMX290_REG_8BIT(0x30a2), 0x02 },
{ IMX290_REG_8BIT(0x30a6), 0x20 },
{ IMX290_REG_8BIT(0x30a8), 0x20 },
{ IMX290_REG_8BIT(0x30aa), 0x20 },
{ IMX290_REG_8BIT(0x30ac), 0x20 },
{ IMX290_REG_8BIT(0x30b0), 0x43 },
{ IMX290_REG_8BIT(0x3119), 0x9e },
{ IMX290_REG_8BIT(0x311c), 0x1e },
{ IMX290_REG_8BIT(0x311e), 0x08 },
{ IMX290_REG_8BIT(0x3128), 0x05 },
{ IMX290_REG_8BIT(0x313d), 0x83 },
{ IMX290_REG_8BIT(0x3150), 0x03 },
{ IMX290_REG_8BIT(0x317e), 0x00 },
{ IMX290_REG_8BIT(0x32b8), 0x50 },
{ IMX290_REG_8BIT(0x32b9), 0x10 },
{ IMX290_REG_8BIT(0x32ba), 0x00 },
{ IMX290_REG_8BIT(0x32bb), 0x04 },
{ IMX290_REG_8BIT(0x32c8), 0x50 },
{ IMX290_REG_8BIT(0x32c9), 0x10 },
{ IMX290_REG_8BIT(0x32ca), 0x00 },
{ IMX290_REG_8BIT(0x32cb), 0x04 },
{ IMX290_REG_8BIT(0x332c), 0xd3 },
{ IMX290_REG_8BIT(0x332d), 0x10 },
{ IMX290_REG_8BIT(0x332e), 0x0d },
{ IMX290_REG_8BIT(0x3358), 0x06 },
{ IMX290_REG_8BIT(0x3359), 0xe1 },
{ IMX290_REG_8BIT(0x335a), 0x11 },
{ IMX290_REG_8BIT(0x3360), 0x1e },
{ IMX290_REG_8BIT(0x3361), 0x61 },
{ IMX290_REG_8BIT(0x3362), 0x10 },
{ IMX290_REG_8BIT(0x33b0), 0x50 },
{ IMX290_REG_8BIT(0x33b2), 0x1a },
{ IMX290_REG_8BIT(0x33b3), 0x04 },
{ IMX290_REG_8BIT(0x3480), 0x49 },
};
static const struct imx290_regval imx290_1080p_settings[] = {
/* mode settings */
{ IMX290_CTRL_07, IMX290_WINMODE_1080P },
{ IMX290_WINWV_OB, 12 },
{ IMX290_OPB_SIZE_V, 10 },
{ IMX290_X_OUT_SIZE, 1920 },
{ IMX290_Y_OUT_SIZE, 1080 },
{ IMX290_INCKSEL1, 0x18 },
{ IMX290_INCKSEL2, 0x03 },
{ IMX290_INCKSEL3, 0x20 },
{ IMX290_INCKSEL4, 0x01 },
{ IMX290_INCKSEL5, 0x1a },
{ IMX290_INCKSEL6, 0x1a },
/* data rate settings */
{ IMX290_REPETITION, 0x10 },
{ IMX290_TCLKPOST, 87 },
{ IMX290_THSZERO, 55 },
{ IMX290_THSPREPARE, 31 },
{ IMX290_TCLKTRAIL, 31 },
{ IMX290_THSTRAIL, 31 },
{ IMX290_TCLKZERO, 119 },
{ IMX290_TCLKPREPARE, 31 },
{ IMX290_TLPX, 23 },
};
static const struct imx290_regval imx290_720p_settings[] = {
/* mode settings */
{ IMX290_CTRL_07, IMX290_WINMODE_720P },
{ IMX290_WINWV_OB, 6 },
{ IMX290_OPB_SIZE_V, 4 },
{ IMX290_X_OUT_SIZE, 1280 },
{ IMX290_Y_OUT_SIZE, 720 },
{ IMX290_INCKSEL1, 0x20 },
{ IMX290_INCKSEL2, 0x00 },
{ IMX290_INCKSEL3, 0x20 },
{ IMX290_INCKSEL4, 0x01 },
{ IMX290_INCKSEL5, 0x1a },
{ IMX290_INCKSEL6, 0x1a },
/* data rate settings */
{ IMX290_REPETITION, 0x10 },
{ IMX290_TCLKPOST, 79 },
{ IMX290_THSZERO, 47 },
{ IMX290_THSPREPARE, 23 },
{ IMX290_TCLKTRAIL, 23 },
{ IMX290_THSTRAIL, 23 },
{ IMX290_TCLKZERO, 87 },
{ IMX290_TCLKPREPARE, 23 },
{ IMX290_TLPX, 23 },
};
static const struct imx290_regval imx290_10bit_settings[] = {
{ IMX290_ADBIT, IMX290_ADBIT_10BIT },
{ IMX290_OUT_CTRL, IMX290_ODBIT_10BIT },
{ IMX290_ADBIT1, IMX290_ADBIT1_10BIT },
{ IMX290_ADBIT2, IMX290_ADBIT2_10BIT },
{ IMX290_ADBIT3, IMX290_ADBIT3_10BIT },
{ IMX290_CSI_DT_FMT, IMX290_CSI_DT_FMT_RAW10 },
};
static const struct imx290_regval imx290_12bit_settings[] = {
{ IMX290_ADBIT, IMX290_ADBIT_12BIT },
{ IMX290_OUT_CTRL, IMX290_ODBIT_12BIT },
{ IMX290_ADBIT1, IMX290_ADBIT1_12BIT },
{ IMX290_ADBIT2, IMX290_ADBIT2_12BIT },
{ IMX290_ADBIT3, IMX290_ADBIT3_12BIT },
{ IMX290_CSI_DT_FMT, IMX290_CSI_DT_FMT_RAW12 },
};
/* supported link frequencies */
#define FREQ_INDEX_1080P 0
#define FREQ_INDEX_720P 1
static const s64 imx290_link_freq_2lanes[] = {
[FREQ_INDEX_1080P] = 445500000,
[FREQ_INDEX_720P] = 297000000,
};
static const s64 imx290_link_freq_4lanes[] = {
[FREQ_INDEX_1080P] = 222750000,
[FREQ_INDEX_720P] = 148500000,
};
/*
* In this function and in the similar ones below We rely on imx290_probe()
* to ensure that nlanes is either 2 or 4.
*/
static inline const s64 *imx290_link_freqs_ptr(const struct imx290 *imx290)
{
if (imx290->nlanes == 2)
return imx290_link_freq_2lanes;
else
return imx290_link_freq_4lanes;
}
static inline int imx290_link_freqs_num(const struct imx290 *imx290)
{
if (imx290->nlanes == 2)
return ARRAY_SIZE(imx290_link_freq_2lanes);
else
return ARRAY_SIZE(imx290_link_freq_4lanes);
}
/* Mode configs */
static const struct imx290_mode imx290_modes_2lanes[] = {
{
.width = 1920,
.height = 1080,
.hmax = 4400,
.link_freq_index = FREQ_INDEX_1080P,
.data = imx290_1080p_settings,
.data_size = ARRAY_SIZE(imx290_1080p_settings),
},
{
.width = 1280,
.height = 720,
.hmax = 6600,
.link_freq_index = FREQ_INDEX_720P,
.data = imx290_720p_settings,
.data_size = ARRAY_SIZE(imx290_720p_settings),
},
};
static const struct imx290_mode imx290_modes_4lanes[] = {
{
.width = 1920,
.height = 1080,
.hmax = 2200,
.link_freq_index = FREQ_INDEX_1080P,
.data = imx290_1080p_settings,
.data_size = ARRAY_SIZE(imx290_1080p_settings),
},
{
.width = 1280,
.height = 720,
.hmax = 3300,
.link_freq_index = FREQ_INDEX_720P,
.data = imx290_720p_settings,
.data_size = ARRAY_SIZE(imx290_720p_settings),
},
};
static inline const struct imx290_mode *imx290_modes_ptr(const struct imx290 *imx290)
{
if (imx290->nlanes == 2)
return imx290_modes_2lanes;
else
return imx290_modes_4lanes;
}
static inline int imx290_modes_num(const struct imx290 *imx290)
{
if (imx290->nlanes == 2)
return ARRAY_SIZE(imx290_modes_2lanes);
else
return ARRAY_SIZE(imx290_modes_4lanes);
}
struct imx290_format_info {
u32 code;
u8 bpp;
const struct imx290_regval *regs;
unsigned int num_regs;
};
static const struct imx290_format_info imx290_formats[] = {
{
.code = MEDIA_BUS_FMT_SRGGB10_1X10,
.bpp = 10,
.regs = imx290_10bit_settings,
.num_regs = ARRAY_SIZE(imx290_10bit_settings),
}, {
.code = MEDIA_BUS_FMT_SRGGB12_1X12,
.bpp = 12,
.regs = imx290_12bit_settings,
.num_regs = ARRAY_SIZE(imx290_12bit_settings),
}
};
static const struct imx290_format_info *imx290_format_info(u32 code)
{
unsigned int i;
for (i = 0; i < ARRAY_SIZE(imx290_formats); ++i) {
const struct imx290_format_info *info = &imx290_formats[i];
if (info->code == code)
return info;
}
return NULL;
}
/* -----------------------------------------------------------------------------
* Register access
*/
static int __always_unused imx290_read(struct imx290 *imx290, u32 addr, u32 *value)
{
u8 data[3] = { 0, 0, 0 };
int ret;
ret = regmap_raw_read(imx290->regmap, addr & IMX290_REG_ADDR_MASK,
data, (addr >> IMX290_REG_SIZE_SHIFT) & 3);
if (ret < 0) {
dev_err(imx290->dev, "%u-bit read from 0x%04x failed: %d\n",
((addr >> IMX290_REG_SIZE_SHIFT) & 3) * 8,
addr & IMX290_REG_ADDR_MASK, ret);
return ret;
}
*value = (data[2] << 16) | (data[1] << 8) | data[0];
return 0;
}
static int imx290_write(struct imx290 *imx290, u32 addr, u32 value, int *err)
{
u8 data[3] = { value & 0xff, (value >> 8) & 0xff, value >> 16 };
int ret;
if (err && *err)
return *err;
ret = regmap_raw_write(imx290->regmap, addr & IMX290_REG_ADDR_MASK,
data, (addr >> IMX290_REG_SIZE_SHIFT) & 3);
if (ret < 0) {
dev_err(imx290->dev, "%u-bit write to 0x%04x failed: %d\n",
((addr >> IMX290_REG_SIZE_SHIFT) & 3) * 8,
addr & IMX290_REG_ADDR_MASK, ret);
if (err)
*err = ret;
}
return ret;
}
static int imx290_set_register_array(struct imx290 *imx290,
const struct imx290_regval *settings,
unsigned int num_settings)
{
unsigned int i;
int ret;
for (i = 0; i < num_settings; ++i, ++settings) {
ret = imx290_write(imx290, settings->reg, settings->val, NULL);
if (ret < 0)
return ret;
}
/* Provide 10ms settle time */
usleep_range(10000, 11000);
return 0;
}
static int imx290_set_data_lanes(struct imx290 *imx290)
{
int ret = 0;
u32 frsel;
switch (imx290->nlanes) {
case 2:
default:
frsel = 0x02;
break;
case 4:
frsel = 0x01;
break;
}
imx290_write(imx290, IMX290_PHY_LANE_NUM, imx290->nlanes - 1, &ret);
imx290_write(imx290, IMX290_CSI_LANE_MODE, imx290->nlanes - 1, &ret);
imx290_write(imx290, IMX290_FR_FDG_SEL, frsel, &ret);
return ret;
}
static int imx290_set_black_level(struct imx290 *imx290,
const struct v4l2_mbus_framefmt *format,
unsigned int black_level, int *err)
{
unsigned int bpp = imx290_format_info(format->code)->bpp;
return imx290_write(imx290, IMX290_BLKLEVEL,
black_level >> (16 - bpp), err);
}
static int imx290_setup_format(struct imx290 *imx290,
const struct v4l2_mbus_framefmt *format)
{
const struct imx290_format_info *info;
int ret;
info = imx290_format_info(format->code);
ret = imx290_set_register_array(imx290, info->regs, info->num_regs);
if (ret < 0) {
dev_err(imx290->dev, "Could not set format registers\n");
return ret;
}
return imx290_set_black_level(imx290, format,
IMX290_BLACK_LEVEL_DEFAULT, &ret);
}
/* ----------------------------------------------------------------------------
* Controls
*/
static int imx290_set_ctrl(struct v4l2_ctrl *ctrl)
{
struct imx290 *imx290 = container_of(ctrl->handler,
struct imx290, ctrls);
const struct v4l2_mbus_framefmt *format;
struct v4l2_subdev_state *state;
int ret = 0;
/*
* Return immediately for controls that don't need to be applied to the
* device.
*/
if (ctrl->flags & V4L2_CTRL_FLAG_READ_ONLY)
return 0;
/* V4L2 controls values will be applied only when power is already up */
if (!pm_runtime_get_if_in_use(imx290->dev))
return 0;
state = v4l2_subdev_get_locked_active_state(&imx290->sd);
format = v4l2_subdev_get_pad_format(&imx290->sd, state, 0);
switch (ctrl->id) {
case V4L2_CID_ANALOGUE_GAIN:
ret = imx290_write(imx290, IMX290_GAIN, ctrl->val, NULL);
break;
case V4L2_CID_EXPOSURE:
ret = imx290_write(imx290, IMX290_SHS1,
IMX290_VMAX_DEFAULT - ctrl->val - 1, NULL);
break;
case V4L2_CID_TEST_PATTERN:
if (ctrl->val) {
imx290_set_black_level(imx290, format, 0, &ret);
usleep_range(10000, 11000);
imx290_write(imx290, IMX290_PGCTRL,
(u8)(IMX290_PGCTRL_REGEN |
IMX290_PGCTRL_THRU |
IMX290_PGCTRL_MODE(ctrl->val)), &ret);
} else {
imx290_write(imx290, IMX290_PGCTRL, 0x00, &ret);
usleep_range(10000, 11000);
imx290_set_black_level(imx290, format,
IMX290_BLACK_LEVEL_DEFAULT, &ret);
}
break;
default:
ret = -EINVAL;
break;
}
pm_runtime_mark_last_busy(imx290->dev);
pm_runtime_put_autosuspend(imx290->dev);
return ret;
}
static const struct v4l2_ctrl_ops imx290_ctrl_ops = {
.s_ctrl = imx290_set_ctrl,
};
static const char * const imx290_test_pattern_menu[] = {
"Disabled",
"Sequence Pattern 1",
"Horizontal Color-bar Chart",
"Vertical Color-bar Chart",
"Sequence Pattern 2",
"Gradation Pattern 1",
"Gradation Pattern 2",
"000/555h Toggle Pattern",
};
static void imx290_ctrl_update(struct imx290 *imx290,
const struct v4l2_mbus_framefmt *format,
const struct imx290_mode *mode)
{
unsigned int hblank = mode->hmax - mode->width;
unsigned int vblank = IMX290_VMAX_DEFAULT - mode->height;
s64 link_freq = imx290_link_freqs_ptr(imx290)[mode->link_freq_index];
u64 pixel_rate;
/* pixel rate = link_freq * 2 * nr_of_lanes / bits_per_sample */
pixel_rate = link_freq * 2 * imx290->nlanes;
do_div(pixel_rate, imx290_format_info(format->code)->bpp);
__v4l2_ctrl_s_ctrl(imx290->link_freq, mode->link_freq_index);
__v4l2_ctrl_s_ctrl_int64(imx290->pixel_rate, pixel_rate);
__v4l2_ctrl_modify_range(imx290->hblank, hblank, hblank, 1, hblank);
__v4l2_ctrl_modify_range(imx290->vblank, vblank, vblank, 1, vblank);
}
static int imx290_ctrl_init(struct imx290 *imx290)
{
struct v4l2_fwnode_device_properties props;
int ret;
ret = v4l2_fwnode_device_parse(imx290->dev, &props);
if (ret < 0)
return ret;
v4l2_ctrl_handler_init(&imx290->ctrls, 9);
/*
* The sensor has an analog gain and a digital gain, both controlled
* through a single gain value, expressed in 0.3dB increments. Values
* from 0.0dB (0) to 30.0dB (100) apply analog gain only, higher values
* up to 72.0dB (240) add further digital gain. Limit the range to
* analog gain only, support for digital gain can be added separately
* if needed.
*
* The IMX327 and IMX462 are largely compatible with the IMX290, but
* have an analog gain range of 0.0dB to 29.4dB and 42dB of digital
* gain. When support for those sensors gets added to the driver, the
* gain control should be adjusted accordingly.
*/
v4l2_ctrl_new_std(&imx290->ctrls, &imx290_ctrl_ops,
V4L2_CID_ANALOGUE_GAIN, 0, 100, 1, 0);
v4l2_ctrl_new_std(&imx290->ctrls, &imx290_ctrl_ops,
V4L2_CID_EXPOSURE, 1, IMX290_VMAX_DEFAULT - 2, 1,
IMX290_VMAX_DEFAULT - 2);
/*
* Set the link frequency, pixel rate, horizontal blanking and vertical
* blanking to hardcoded values, they will be updated by
* imx290_ctrl_update().
*/
imx290->link_freq =
v4l2_ctrl_new_int_menu(&imx290->ctrls, &imx290_ctrl_ops,
V4L2_CID_LINK_FREQ,
imx290_link_freqs_num(imx290) - 1, 0,
imx290_link_freqs_ptr(imx290));
if (imx290->link_freq)
imx290->link_freq->flags |= V4L2_CTRL_FLAG_READ_ONLY;
imx290->pixel_rate = v4l2_ctrl_new_std(&imx290->ctrls, &imx290_ctrl_ops,
V4L2_CID_PIXEL_RATE,
1, INT_MAX, 1, 1);
v4l2_ctrl_new_std_menu_items(&imx290->ctrls, &imx290_ctrl_ops,
V4L2_CID_TEST_PATTERN,
ARRAY_SIZE(imx290_test_pattern_menu) - 1,
0, 0, imx290_test_pattern_menu);
imx290->hblank = v4l2_ctrl_new_std(&imx290->ctrls, &imx290_ctrl_ops,
V4L2_CID_HBLANK, 1, 1, 1, 1);
if (imx290->hblank)
imx290->hblank->flags |= V4L2_CTRL_FLAG_READ_ONLY;
imx290->vblank = v4l2_ctrl_new_std(&imx290->ctrls, &imx290_ctrl_ops,
V4L2_CID_VBLANK, 1, 1, 1, 1);
if (imx290->vblank)
imx290->vblank->flags |= V4L2_CTRL_FLAG_READ_ONLY;
v4l2_ctrl_new_fwnode_properties(&imx290->ctrls, &imx290_ctrl_ops,
&props);
imx290->sd.ctrl_handler = &imx290->ctrls;
if (imx290->ctrls.error) {
ret = imx290->ctrls.error;
v4l2_ctrl_handler_free(&imx290->ctrls);
return ret;
}
return 0;
}
/* ----------------------------------------------------------------------------
* Subdev operations
*/
/* Start streaming */
static int imx290_start_streaming(struct imx290 *imx290,
struct v4l2_subdev_state *state)
{
const struct v4l2_mbus_framefmt *format;
int ret;
/* Set init register settings */
ret = imx290_set_register_array(imx290, imx290_global_init_settings,
ARRAY_SIZE(
imx290_global_init_settings));
if (ret < 0) {
dev_err(imx290->dev, "Could not set init registers\n");
return ret;
}
/* Set data lane count */
ret = imx290_set_data_lanes(imx290);
if (ret < 0) {
dev_err(imx290->dev, "Could not set data lanes\n");
return ret;
}
/* Apply the register values related to current frame format */
format = v4l2_subdev_get_pad_format(&imx290->sd, state, 0);
ret = imx290_setup_format(imx290, format);
if (ret < 0) {
dev_err(imx290->dev, "Could not set frame format\n");
return ret;
}
/* Apply default values of current mode */
ret = imx290_set_register_array(imx290, imx290->current_mode->data,
imx290->current_mode->data_size);
if (ret < 0) {
dev_err(imx290->dev, "Could not set current mode\n");
return ret;
}
ret = imx290_write(imx290, IMX290_HMAX, imx290->current_mode->hmax,
NULL);
if (ret)
return ret;
/* Apply customized values from user */
ret = __v4l2_ctrl_handler_setup(imx290->sd.ctrl_handler);
if (ret) {
dev_err(imx290->dev, "Could not sync v4l2 controls\n");
return ret;
}
imx290_write(imx290, IMX290_STANDBY, 0x00, &ret);
msleep(30);
/* Start streaming */
return imx290_write(imx290, IMX290_XMSTA, 0x00, &ret);
}
/* Stop streaming */
static int imx290_stop_streaming(struct imx290 *imx290)
{
int ret = 0;
imx290_write(imx290, IMX290_STANDBY, 0x01, &ret);
msleep(30);
return imx290_write(imx290, IMX290_XMSTA, 0x01, &ret);
}
static int imx290_set_stream(struct v4l2_subdev *sd, int enable)
{
struct imx290 *imx290 = to_imx290(sd);
struct v4l2_subdev_state *state;
int ret = 0;
state = v4l2_subdev_lock_and_get_active_state(sd);
if (enable) {
ret = pm_runtime_resume_and_get(imx290->dev);
if (ret < 0)
goto unlock;
ret = imx290_start_streaming(imx290, state);
if (ret) {
dev_err(imx290->dev, "Start stream failed\n");
pm_runtime_put_sync(imx290->dev);
goto unlock;
}
} else {
imx290_stop_streaming(imx290);
pm_runtime_mark_last_busy(imx290->dev);
pm_runtime_put_autosuspend(imx290->dev);
}
unlock:
v4l2_subdev_unlock_state(state);
return ret;
}
static int imx290_enum_mbus_code(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_mbus_code_enum *code)
{
if (code->index >= ARRAY_SIZE(imx290_formats))
return -EINVAL;
code->code = imx290_formats[code->index].code;
return 0;
}
static int imx290_enum_frame_size(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_frame_size_enum *fse)
{
const struct imx290 *imx290 = to_imx290(sd);
const struct imx290_mode *imx290_modes = imx290_modes_ptr(imx290);
if (!imx290_format_info(fse->code))
return -EINVAL;
if (fse->index >= imx290_modes_num(imx290))
return -EINVAL;
fse->min_width = imx290_modes[fse->index].width;
fse->max_width = imx290_modes[fse->index].width;
fse->min_height = imx290_modes[fse->index].height;
fse->max_height = imx290_modes[fse->index].height;
return 0;
}
static int imx290_set_fmt(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_format *fmt)
{
struct imx290 *imx290 = to_imx290(sd);
const struct imx290_mode *mode;
struct v4l2_mbus_framefmt *format;
mode = v4l2_find_nearest_size(imx290_modes_ptr(imx290),
imx290_modes_num(imx290), width, height,
fmt->format.width, fmt->format.height);
fmt->format.width = mode->width;
fmt->format.height = mode->height;
if (!imx290_format_info(fmt->format.code))
fmt->format.code = imx290_formats[0].code;
fmt->format.field = V4L2_FIELD_NONE;
format = v4l2_subdev_get_pad_format(sd, sd_state, 0);
if (fmt->which == V4L2_SUBDEV_FORMAT_ACTIVE) {
imx290->current_mode = mode;
imx290_ctrl_update(imx290, &fmt->format, mode);
}
*format = fmt->format;
return 0;
}
static int imx290_get_selection(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_selection *sel)
{
struct v4l2_mbus_framefmt *format;
switch (sel->target) {
case V4L2_SEL_TGT_CROP: {
format = v4l2_subdev_get_pad_format(sd, sd_state, 0);
sel->r.top = IMX920_PIXEL_ARRAY_MARGIN_TOP
+ (IMX290_PIXEL_ARRAY_RECORDING_HEIGHT - format->height) / 2;
sel->r.left = IMX920_PIXEL_ARRAY_MARGIN_LEFT
+ (IMX290_PIXEL_ARRAY_RECORDING_WIDTH - format->width) / 2;
sel->r.width = format->width;
sel->r.height = format->height;
return 0;
}
case V4L2_SEL_TGT_NATIVE_SIZE:
case V4L2_SEL_TGT_CROP_BOUNDS:
sel->r.top = 0;
sel->r.left = 0;
sel->r.width = IMX290_PIXEL_ARRAY_WIDTH;
sel->r.height = IMX290_PIXEL_ARRAY_HEIGHT;
return 0;
case V4L2_SEL_TGT_CROP_DEFAULT:
sel->r.top = IMX920_PIXEL_ARRAY_MARGIN_TOP;
sel->r.left = IMX920_PIXEL_ARRAY_MARGIN_LEFT;
sel->r.width = IMX290_PIXEL_ARRAY_RECORDING_WIDTH;
sel->r.height = IMX290_PIXEL_ARRAY_RECORDING_HEIGHT;
return 0;
default:
return -EINVAL;
}
}
static int imx290_entity_init_cfg(struct v4l2_subdev *subdev,
struct v4l2_subdev_state *sd_state)
{
struct v4l2_subdev_format fmt = {
.which = V4L2_SUBDEV_FORMAT_TRY,
.format = {
.width = 1920,
.height = 1080,
},
};
imx290_set_fmt(subdev, sd_state, &fmt);
return 0;
}
static const struct v4l2_subdev_video_ops imx290_video_ops = {
.s_stream = imx290_set_stream,
};
static const struct v4l2_subdev_pad_ops imx290_pad_ops = {
.init_cfg = imx290_entity_init_cfg,
.enum_mbus_code = imx290_enum_mbus_code,
.enum_frame_size = imx290_enum_frame_size,
.get_fmt = v4l2_subdev_get_fmt,
.set_fmt = imx290_set_fmt,
.get_selection = imx290_get_selection,
};
static const struct v4l2_subdev_ops imx290_subdev_ops = {
.video = &imx290_video_ops,
.pad = &imx290_pad_ops,
};
static const struct media_entity_operations imx290_subdev_entity_ops = {
.link_validate = v4l2_subdev_link_validate,
};
static int imx290_subdev_init(struct imx290 *imx290)
{
struct i2c_client *client = to_i2c_client(imx290->dev);
const struct v4l2_mbus_framefmt *format;
struct v4l2_subdev_state *state;
int ret;
imx290->current_mode = &imx290_modes_ptr(imx290)[0];
v4l2_i2c_subdev_init(&imx290->sd, client, &imx290_subdev_ops);
imx290->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
imx290->sd.dev = imx290->dev;
imx290->sd.entity.ops = &imx290_subdev_entity_ops;
imx290->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR;
imx290->pad.flags = MEDIA_PAD_FL_SOURCE;
ret = media_entity_pads_init(&imx290->sd.entity, 1, &imx290->pad);
if (ret < 0) {
dev_err(imx290->dev, "Could not register media entity\n");
return ret;
}
ret = imx290_ctrl_init(imx290);
if (ret < 0) {
dev_err(imx290->dev, "Control initialization error %d\n", ret);
goto err_media;
}
imx290->sd.state_lock = imx290->ctrls.lock;
ret = v4l2_subdev_init_finalize(&imx290->sd);
if (ret < 0) {
dev_err(imx290->dev, "subdev initialization error %d\n", ret);
goto err_ctrls;
}
state = v4l2_subdev_lock_and_get_active_state(&imx290->sd);
format = v4l2_subdev_get_pad_format(&imx290->sd, state, 0);
imx290_ctrl_update(imx290, format, imx290->current_mode);
v4l2_subdev_unlock_state(state);
return 0;
err_ctrls:
v4l2_ctrl_handler_free(&imx290->ctrls);
err_media:
media_entity_cleanup(&imx290->sd.entity);
return ret;
}
static void imx290_subdev_cleanup(struct imx290 *imx290)
{
v4l2_subdev_cleanup(&imx290->sd);
media_entity_cleanup(&imx290->sd.entity);
v4l2_ctrl_handler_free(&imx290->ctrls);
}
/* ----------------------------------------------------------------------------
* Power management
*/
static int imx290_power_on(struct imx290 *imx290)
{
int ret;
ret = clk_prepare_enable(imx290->xclk);
if (ret) {
dev_err(imx290->dev, "Failed to enable clock\n");
return ret;
}
ret = regulator_bulk_enable(ARRAY_SIZE(imx290->supplies),
imx290->supplies);
if (ret) {
dev_err(imx290->dev, "Failed to enable regulators\n");
clk_disable_unprepare(imx290->xclk);
return ret;
}
usleep_range(1, 2);
gpiod_set_value_cansleep(imx290->rst_gpio, 0);
usleep_range(30000, 31000);
return 0;
}
static void imx290_power_off(struct imx290 *imx290)
{
clk_disable_unprepare(imx290->xclk);
gpiod_set_value_cansleep(imx290->rst_gpio, 1);
regulator_bulk_disable(ARRAY_SIZE(imx290->supplies), imx290->supplies);
}
static int imx290_runtime_resume(struct device *dev)
{
struct v4l2_subdev *sd = dev_get_drvdata(dev);
struct imx290 *imx290 = to_imx290(sd);
return imx290_power_on(imx290);
}
static int imx290_runtime_suspend(struct device *dev)
{
struct v4l2_subdev *sd = dev_get_drvdata(dev);
struct imx290 *imx290 = to_imx290(sd);
imx290_power_off(imx290);
return 0;
}
static const struct dev_pm_ops imx290_pm_ops = {
SET_RUNTIME_PM_OPS(imx290_runtime_suspend, imx290_runtime_resume, NULL)
};
/* ----------------------------------------------------------------------------
* Probe & remove
*/
static const struct regmap_config imx290_regmap_config = {
.reg_bits = 16,
.val_bits = 8,
};
static const char * const imx290_supply_name[IMX290_NUM_SUPPLIES] = {
"vdda",
"vddd",
"vdddo",
};
static int imx290_get_regulators(struct device *dev, struct imx290 *imx290)
{
unsigned int i;
for (i = 0; i < ARRAY_SIZE(imx290->supplies); i++)
imx290->supplies[i].supply = imx290_supply_name[i];
return devm_regulator_bulk_get(dev, ARRAY_SIZE(imx290->supplies),
imx290->supplies);
}
static int imx290_init_clk(struct imx290 *imx290)
{
u32 xclk_freq;
int ret;
ret = fwnode_property_read_u32(dev_fwnode(imx290->dev),
"clock-frequency", &xclk_freq);
if (ret) {
dev_err(imx290->dev, "Could not get xclk frequency\n");
return ret;
}
/* external clock must be 37.125 MHz */
if (xclk_freq != 37125000) {
dev_err(imx290->dev, "External clock frequency %u is not supported\n",
xclk_freq);
return -EINVAL;
}
ret = clk_set_rate(imx290->xclk, xclk_freq);
if (ret) {
dev_err(imx290->dev, "Could not set xclk frequency\n");
return ret;
}
return 0;
}
/*
* Returns 0 if all link frequencies used by the driver for the given number
* of MIPI data lanes are mentioned in the device tree, or the value of the
* first missing frequency otherwise.
*/
static s64 imx290_check_link_freqs(const struct imx290 *imx290,
const struct v4l2_fwnode_endpoint *ep)
{
int i, j;
const s64 *freqs = imx290_link_freqs_ptr(imx290);
int freqs_count = imx290_link_freqs_num(imx290);
for (i = 0; i < freqs_count; i++) {
for (j = 0; j < ep->nr_of_link_frequencies; j++)
if (freqs[i] == ep->link_frequencies[j])
break;
if (j == ep->nr_of_link_frequencies)
return freqs[i];
}
return 0;
}
static int imx290_parse_dt(struct imx290 *imx290)
{
/* Only CSI2 is supported for now: */
struct v4l2_fwnode_endpoint ep = {
.bus_type = V4L2_MBUS_CSI2_DPHY
};
struct fwnode_handle *endpoint;
int ret;
s64 fq;
endpoint = fwnode_graph_get_next_endpoint(dev_fwnode(imx290->dev), NULL);
if (!endpoint) {
dev_err(imx290->dev, "Endpoint node not found\n");
return -EINVAL;
}
ret = v4l2_fwnode_endpoint_alloc_parse(endpoint, &ep);
fwnode_handle_put(endpoint);
if (ret == -ENXIO) {
dev_err(imx290->dev, "Unsupported bus type, should be CSI2\n");
goto done;
} else if (ret) {
dev_err(imx290->dev, "Parsing endpoint node failed\n");
goto done;
}
/* Get number of data lanes */
imx290->nlanes = ep.bus.mipi_csi2.num_data_lanes;
if (imx290->nlanes != 2 && imx290->nlanes != 4) {
dev_err(imx290->dev, "Invalid data lanes: %d\n", imx290->nlanes);
ret = -EINVAL;
goto done;
}
dev_dbg(imx290->dev, "Using %u data lanes\n", imx290->nlanes);
if (!ep.nr_of_link_frequencies) {
dev_err(imx290->dev, "link-frequency property not found in DT\n");
ret = -EINVAL;
goto done;
}
/* Check that link frequences for all the modes are in device tree */
fq = imx290_check_link_freqs(imx290, &ep);
if (fq) {
dev_err(imx290->dev, "Link frequency of %lld is not supported\n",
fq);
ret = -EINVAL;
goto done;
}
ret = 0;
done:
v4l2_fwnode_endpoint_free(&ep);
return ret;
}
static int imx290_probe(struct i2c_client *client)
{
struct device *dev = &client->dev;
struct imx290 *imx290;
int ret;
imx290 = devm_kzalloc(dev, sizeof(*imx290), GFP_KERNEL);
if (!imx290)
return -ENOMEM;
imx290->dev = dev;
imx290->regmap = devm_regmap_init_i2c(client, &imx290_regmap_config);
if (IS_ERR(imx290->regmap)) {
dev_err(dev, "Unable to initialize I2C\n");
return -ENODEV;
}
ret = imx290_parse_dt(imx290);
if (ret)
return ret;
/* Acquire resources. */
imx290->xclk = devm_clk_get(dev, "xclk");
if (IS_ERR(imx290->xclk))
return dev_err_probe(dev, PTR_ERR(imx290->xclk),
"Could not get xclk");
ret = imx290_get_regulators(dev, imx290);
if (ret < 0)
return dev_err_probe(dev, ret, "Cannot get regulators\n");
imx290->rst_gpio = devm_gpiod_get_optional(dev, "reset",
GPIOD_OUT_HIGH);
if (IS_ERR(imx290->rst_gpio))
return dev_err_probe(dev, PTR_ERR(imx290->rst_gpio),
"Cannot get reset gpio\n");
/* Initialize external clock frequency. */
ret = imx290_init_clk(imx290);
if (ret)
return ret;
/*
* 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.
*/
ret = imx290_power_on(imx290);
if (ret < 0) {
dev_err(dev, "Could not power on the device\n");
return ret;
}
/*
* Enable runtime PM with autosuspend. As the device has been powered
* manually, mark it as active, and increase the usage count without
* resuming the device.
*/
pm_runtime_set_active(dev);
pm_runtime_get_noresume(dev);
pm_runtime_enable(dev);
pm_runtime_set_autosuspend_delay(dev, 1000);
pm_runtime_use_autosuspend(dev);
/* Initialize the V4L2 subdev. */
ret = imx290_subdev_init(imx290);
if (ret)
goto err_pm;
/*
* Finally, register the V4L2 subdev. This must be done after
* initializing everything as the subdev can be used immediately after
* being registered.
*/
ret = v4l2_async_register_subdev(&imx290->sd);
if (ret < 0) {
dev_err(dev, "Could not register v4l2 device\n");
goto err_subdev;
}
/*
* Decrease the PM usage count. The device will get suspended after the
* autosuspend delay, turning the power off.
*/
pm_runtime_mark_last_busy(dev);
pm_runtime_put_autosuspend(dev);
return 0;
err_subdev:
imx290_subdev_cleanup(imx290);
err_pm:
pm_runtime_disable(dev);
pm_runtime_put_noidle(dev);
imx290_power_off(imx290);
return ret;
}
static void imx290_remove(struct i2c_client *client)
{
struct v4l2_subdev *sd = i2c_get_clientdata(client);
struct imx290 *imx290 = to_imx290(sd);
v4l2_async_unregister_subdev(sd);
imx290_subdev_cleanup(imx290);
/*
* Disable runtime PM. In case runtime PM is disabled in the kernel,
* make sure to turn power off manually.
*/
pm_runtime_disable(imx290->dev);
if (!pm_runtime_status_suspended(imx290->dev))
imx290_power_off(imx290);
pm_runtime_set_suspended(imx290->dev);
}
static const struct of_device_id imx290_of_match[] = {
{ .compatible = "sony,imx290" },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, imx290_of_match);
static struct i2c_driver imx290_i2c_driver = {
.probe_new = imx290_probe,
.remove = imx290_remove,
.driver = {
.name = "imx290",
.pm = &imx290_pm_ops,
.of_match_table = of_match_ptr(imx290_of_match),
},
};
module_i2c_driver(imx290_i2c_driver);
MODULE_DESCRIPTION("Sony IMX290 CMOS Image Sensor Driver");
MODULE_AUTHOR("FRAMOS GmbH");
MODULE_AUTHOR("Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>");
MODULE_LICENSE("GPL v2");
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