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media: i2c: imx214: Verify chip ID

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Check the chip ID and stop probing if it is no imx214 sensor.

Acked-by: Ricardo Ribalda <ribalda@chromium.org>
Signed-off-by: André Apitzsch <git@apitzsch.eu>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
This commit is contained in:
André Apitzsch
2024-12-20 14:26:09 +01:00
committed by Hans Verkuil
parent dafbd1e960
commit f35f7422b9
1 changed files with 29 additions and 0 deletions
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29
drivers/media/i2c/imx214.c
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@@ -20,6 +20,10 @@
#include <media/v4l2-fwnode.h>
#include <media/v4l2-subdev.h>
/* Chip ID */
#define IMX214_REG_CHIP_ID CCI_REG16(0x0016)
#define IMX214_CHIP_ID 0x0214
#define IMX214_REG_MODE_SELECT CCI_REG8(0x0100)
#define IMX214_MODE_STANDBY 0x00
#define IMX214_MODE_STREAMING 0x01
@@ -1101,6 +1105,27 @@ static int imx214_get_regulators(struct device *dev, struct imx214 *imx214)
imx214->supplies);
}
/* Verify chip ID */
static int imx214_identify_module(struct imx214 *imx214)
{
struct i2c_client *client = v4l2_get_subdevdata(&imx214->sd);
int ret;
u64 val;
ret = cci_read(imx214->regmap, IMX214_REG_CHIP_ID, &val, NULL);
if (ret)
return dev_err_probe(&client->dev, ret,
"failed to read chip id %x\n",
IMX214_CHIP_ID);
if (val != IMX214_CHIP_ID)
return dev_err_probe(&client->dev, -EIO,
"chip id mismatch: %x!=%llx\n",
IMX214_CHIP_ID, val);
return 0;
}
static int imx214_parse_fwnode(struct device *dev)
{
struct fwnode_handle *endpoint;
@@ -1194,6 +1219,10 @@ static int imx214_probe(struct i2c_client *client)
*/
imx214_power_on(imx214->dev);
ret = imx214_identify_module(imx214);
if (ret)
goto error_power_off;
ret = imx214_ctrls_init(imx214);
if (ret < 0)
goto error_power_off;