summaryrefslogtreecommitdiff
path: root/drivers/media
diff options
context:
space:
mode:
authorBryan O'Donoghue <bryan.odonoghue@linaro.org>2022-04-15 13:59:54 +0200
committerMauro Carvalho Chehab <mchehab@kernel.org>2022-05-17 09:07:59 +0200
commit3de9dc7f677312c717eebcee5c4535b4c6be7662 (patch)
treeae5c24a226b5ad741e8072f9cfbf63e090411484 /drivers/media
parent2aab3abfda2bbb2c758e4b2a1df04ee04d3bab22 (diff)
media: i2c: imx412: Add bulk regulator support
Depending on the platform we may need to enable and disable three separate regulators for the imx412. - DOVDD Digital I/O power - AVDD Analog power - DVDD Digital core power The addition of these regulators shouldn't affect existing users using fixed-on/firmware-controlled regulators. Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org> Reviewed-by: Jacopo Mondi <jacopo@jmondi.org> Acked-by: Daniele Alessandrelli <daniele.alessandrelli@intel.com> Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
Diffstat (limited to 'drivers/media')
-rw-r--r--drivers/media/i2c/imx412.c31
1 files changed, 31 insertions, 0 deletions
diff --git a/drivers/media/i2c/imx412.c b/drivers/media/i2c/imx412.c
index 84279a680873..a1394d6c1432 100644
--- a/drivers/media/i2c/imx412.c
+++ b/drivers/media/i2c/imx412.c
@@ -11,6 +11,7 @@
#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-fwnode.h>
@@ -101,6 +102,12 @@ struct imx412_mode {
struct imx412_reg_list reg_list;
};
+static const char * const imx412_supply_names[] = {
+ "dovdd", /* Digital I/O power */
+ "avdd", /* Analog power */
+ "dvdd", /* Digital core power */
+};
+
/**
* struct imx412 - imx412 sensor device structure
* @dev: Pointer to generic device
@@ -109,6 +116,7 @@ struct imx412_mode {
* @pad: Media pad. Only one pad supported
* @reset_gpio: Sensor reset gpio
* @inclk: Sensor input clock
+ * @supplies: Regulator supplies
* @ctrl_handler: V4L2 control handler
* @link_freq_ctrl: Pointer to link frequency control
* @pclk_ctrl: Pointer to pixel clock control
@@ -128,6 +136,7 @@ struct imx412 {
struct media_pad pad;
struct gpio_desc *reset_gpio;
struct clk *inclk;
+ struct regulator_bulk_data supplies[ARRAY_SIZE(imx412_supply_names)];
struct v4l2_ctrl_handler ctrl_handler;
struct v4l2_ctrl *link_freq_ctrl;
struct v4l2_ctrl *pclk_ctrl;
@@ -946,6 +955,16 @@ static int imx412_parse_hw_config(struct imx412 *imx412)
return -EINVAL;
}
+ /* Get optional DT defined regulators */
+ for (i = 0; i < ARRAY_SIZE(imx412_supply_names); i++)
+ imx412->supplies[i].supply = imx412_supply_names[i];
+
+ ret = devm_regulator_bulk_get(imx412->dev,
+ ARRAY_SIZE(imx412_supply_names),
+ imx412->supplies);
+ if (ret)
+ return ret;
+
ep = fwnode_graph_get_next_endpoint(fwnode, NULL);
if (!ep)
return -ENXIO;
@@ -1011,6 +1030,13 @@ static int imx412_power_on(struct device *dev)
struct imx412 *imx412 = to_imx412(sd);
int ret;
+ ret = regulator_bulk_enable(ARRAY_SIZE(imx412_supply_names),
+ imx412->supplies);
+ if (ret < 0) {
+ dev_err(dev, "failed to enable regulators\n");
+ return ret;
+ }
+
gpiod_set_value_cansleep(imx412->reset_gpio, 0);
ret = clk_prepare_enable(imx412->inclk);
@@ -1025,6 +1051,8 @@ static int imx412_power_on(struct device *dev)
error_reset:
gpiod_set_value_cansleep(imx412->reset_gpio, 1);
+ regulator_bulk_disable(ARRAY_SIZE(imx412_supply_names),
+ imx412->supplies);
return ret;
}
@@ -1044,6 +1072,9 @@ static int imx412_power_off(struct device *dev)
gpiod_set_value_cansleep(imx412->reset_gpio, 1);
+ regulator_bulk_disable(ARRAY_SIZE(imx412_supply_names),
+ imx412->supplies);
+
return 0;
}