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| author | Dave Stevenson <dave.stevenson@raspberrypi.com> | 2024-05-01 09:24:22 -0600 |
|---|---|---|
| committer | Hans Verkuil <hverkuil-cisco@xs4all.nl> | 2024-06-04 08:31:23 +0200 |
| commit | 850b8acde0b50d9bb894d26ed8cae0f85b89511b (patch) | |
| tree | 6c62db4ff9b497cba7f1e8e66ee64d70402cc87a /drivers/media/i2c/imx258.c | |
| parent | 04392d73ae360a4fc502243c1b408464963d5d98 (diff) | |
| download | lwn-850b8acde0b50d9bb894d26ed8cae0f85b89511b.tar.gz lwn-850b8acde0b50d9bb894d26ed8cae0f85b89511b.zip | |
media: i2c: imx258: Add regulator control
The device tree bindings define the relevant regulators for the
sensor, so update the driver to request the regulators and control
them at the appropriate times.
Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
Signed-off-by: Luis Garcia <git@luigi311.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Diffstat (limited to 'drivers/media/i2c/imx258.c')
| -rw-r--r-- | drivers/media/i2c/imx258.c | 42 |
1 files changed, 41 insertions, 1 deletions
diff --git a/drivers/media/i2c/imx258.c b/drivers/media/i2c/imx258.c index df7ed4716762..495eaada2945 100644 --- a/drivers/media/i2c/imx258.c +++ b/drivers/media/i2c/imx258.c @@ -7,6 +7,7 @@ #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> @@ -507,6 +508,16 @@ static const char * const imx258_test_pattern_menu[] = { "Pseudorandom Sequence (PN9)", }; +/* regulator supplies */ +static const char * const imx258_supply_name[] = { + /* Supplies can be enabled in any order */ + "vana", /* Analog (2.8V) supply */ + "vdig", /* Digital Core (1.2V) supply */ + "vif", /* IF (1.8V) supply */ +}; + +#define IMX258_NUM_SUPPLIES ARRAY_SIZE(imx258_supply_name) + /* Configurations for supported link frequencies */ #define IMX258_LINK_FREQ_634MHZ 633600000ULL #define IMX258_LINK_FREQ_320MHZ 320000000ULL @@ -611,6 +622,7 @@ struct imx258 { struct mutex mutex; struct clk *clk; + struct regulator_bulk_data supplies[IMX258_NUM_SUPPLIES]; }; static inline struct imx258 *to_imx258(struct v4l2_subdev *_sd) @@ -995,9 +1007,19 @@ static int imx258_power_on(struct device *dev) struct imx258 *imx258 = to_imx258(sd); int ret; + ret = regulator_bulk_enable(IMX258_NUM_SUPPLIES, + imx258->supplies); + if (ret) { + dev_err(dev, "%s: failed to enable regulators\n", + __func__); + return ret; + } + ret = clk_prepare_enable(imx258->clk); - if (ret) + if (ret) { dev_err(dev, "failed to enable clock\n"); + regulator_bulk_disable(IMX258_NUM_SUPPLIES, imx258->supplies); + } return ret; } @@ -1008,6 +1030,7 @@ static int imx258_power_off(struct device *dev) struct imx258 *imx258 = to_imx258(sd); clk_disable_unprepare(imx258->clk); + regulator_bulk_disable(IMX258_NUM_SUPPLIES, imx258->supplies); return 0; } @@ -1220,6 +1243,18 @@ static void imx258_free_controls(struct imx258 *imx258) mutex_destroy(&imx258->mutex); } +static int imx258_get_regulators(struct imx258 *imx258, + struct i2c_client *client) +{ + unsigned int i; + + for (i = 0; i < IMX258_NUM_SUPPLIES; i++) + imx258->supplies[i].supply = imx258_supply_name[i]; + + return devm_regulator_bulk_get(&client->dev, + IMX258_NUM_SUPPLIES, imx258->supplies); +} + static int imx258_probe(struct i2c_client *client) { struct imx258 *imx258; @@ -1230,6 +1265,11 @@ static int imx258_probe(struct i2c_client *client) if (!imx258) return -ENOMEM; + ret = imx258_get_regulators(imx258, client); + if (ret) + return dev_err_probe(&client->dev, ret, + "failed to get regulators\n"); + imx258->clk = devm_clk_get_optional(&client->dev, NULL); if (IS_ERR(imx258->clk)) return dev_err_probe(&client->dev, PTR_ERR(imx258->clk), |