aboutsummaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorBryan O'Donoghue <bryan.odonoghue@linaro.org>2021-10-24 14:51:21 +0100
committerBryan O'Donoghue <bryan.odonoghue@linaro.org>2021-12-21 17:41:42 +0000
commite82fc1b29d9227cad3ad7dcab362c39dd4a63bdb (patch)
treefe8b48f92f4f6ed3fbc03ee5ecc825b34d5ff833
parent562c9d13517f588e7409deb7ff606ceb6bd24233 (diff)
downloadkernel-e82fc1b29d9227cad3ad7dcab362c39dd4a63bdb.tar.gz
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 Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
-rw-r--r--drivers/media/i2c/imx412.c33
1 files changed, 33 insertions, 0 deletions
diff --git a/drivers/media/i2c/imx412.c b/drivers/media/i2c/imx412.c
index a1aeff1f48c2..5dee2d23f3fe 100644
--- a/drivers/media/i2c/imx412.c
+++ b/drivers/media/i2c/imx412.c
@@ -16,6 +16,8 @@
#include <media/v4l2-fwnode.h>
#include <media/v4l2-subdev.h>
+#include <linux/regulator/consumer.h>
+
/* Streaming Mode */
#define IMX412_REG_MODE_SELECT 0x0100
#define IMX412_MODE_STANDBY 0x00
@@ -101,6 +103,12 @@ 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
@@ -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;
@@ -956,6 +965,18 @@ static int imx412_parse_hw_config(struct imx412 *imx412)
return -EINVAL;
}
+ if (!is_acpi_node(fwnode)) {
+ /* Get 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;
@@ -1021,6 +1042,15 @@ 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");
+ goto error_reset;
+ }
+
+ usleep_range(400, 600);
+
gpiod_set_value_cansleep(imx412->reset_gpio, 1);
ret = clk_prepare_enable(imx412->inclk);
@@ -1054,6 +1084,9 @@ static int imx412_power_off(struct device *dev)
clk_disable_unprepare(imx412->inclk);
+ regulator_bulk_disable(ARRAY_SIZE(imx412_supply_names),
+ imx412->supplies);
+
return 0;
}