101 lines
2.8 KiB
Diff
101 lines
2.8 KiB
Diff
From: Ondrej Jirman <megous@megous.com>
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Date: Fri, 22 Oct 2021 21:44:30 +0200
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Subject: [PATCH 23/36] media: i2c: imx258: Add support for power supplies
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They were documented in DT, but not implemented.
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Signed-off-by: Ondrej Jirman <megous@megous.com>
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---
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drivers/media/i2c/imx258.c | 39 +++++++++++++++++++++++++++++++++++++--
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1 file changed, 37 insertions(+), 2 deletions(-)
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diff --git a/drivers/media/i2c/imx258.c b/drivers/media/i2c/imx258.c
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index ec6e919..2570b51 100644
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--- a/drivers/media/i2c/imx258.c
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+++ b/drivers/media/i2c/imx258.c
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@@ -602,6 +602,15 @@ static const struct imx258_mode supported_modes[] = {
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},
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};
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+/* regulator supplies */
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+static const char * const imx258_supply_names[] = {
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+ "vana", /* Analog (2.8V) supply */
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+ "vdig", /* Digital Core (1.5V) supply */
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+ "vif", /* Digital I/O (1.8V) supply */
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+};
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+
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+#define IMX258_SUPPLY_COUNT ARRAY_SIZE(imx258_supply_names)
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+
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struct imx258 {
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struct v4l2_subdev sd;
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struct media_pad pad;
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@@ -616,6 +625,7 @@ struct imx258 {
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struct gpio_desc *pwdn_gpio;
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struct gpio_desc *reset_gpio;
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+ struct regulator_bulk_data supplies[IMX258_SUPPLY_COUNT];
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/* Current mode */
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const struct imx258_mode *cur_mode;
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@@ -1015,11 +1025,26 @@ static int imx258_power_on(struct device *dev)
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struct imx258 *imx258 = to_imx258(sd);
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int ret;
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+ ret = regulator_bulk_enable(IMX258_SUPPLY_COUNT, imx258->supplies);
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+ if (ret) {
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+ dev_err(dev, "failed to enable regulators\n");
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+ return ret;
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+ }
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+
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+ mdelay(20);
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+
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gpiod_set_value_cansleep(imx258->pwdn_gpio, 0);
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+ mdelay(5);
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+
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ret = clk_prepare_enable(imx258->clk);
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- if (ret)
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+ if (ret) {
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dev_err(dev, "failed to enable clock\n");
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+ regulator_bulk_disable(IMX258_SUPPLY_COUNT, imx258->supplies);
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+ return ret;
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+ }
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+
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+ usleep_range(1000, 2000);
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gpiod_set_value_cansleep(imx258->reset_gpio, 0);
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@@ -1038,6 +1063,8 @@ static int imx258_power_off(struct device *dev)
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gpiod_set_value_cansleep(imx258->reset_gpio, 1);
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gpiod_set_value_cansleep(imx258->pwdn_gpio, 1);
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+ regulator_bulk_disable(IMX258_SUPPLY_COUNT, imx258->supplies);
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+
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return 0;
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}
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@@ -1266,7 +1293,7 @@ static void imx258_free_controls(struct imx258 *imx258)
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static int imx258_probe(struct i2c_client *client)
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{
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struct imx258 *imx258;
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- int ret;
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+ int ret, i;
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u32 val = 0;
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imx258 = devm_kzalloc(&client->dev, sizeof(*imx258), GFP_KERNEL);
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@@ -1301,6 +1328,14 @@ static int imx258_probe(struct i2c_client *client)
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if (ret || val != 180)
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return -EINVAL;
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+ for (i = 0; i < IMX258_SUPPLY_COUNT; i++)
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+ imx258->supplies[i].supply = imx258_supply_names[i];
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+ ret = devm_regulator_bulk_get(&client->dev,
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+ IMX258_SUPPLY_COUNT,
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+ imx258->supplies);
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+ if (ret)
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+ return dev_err_probe(&client->dev, ret, "Failed to get supplies\n");
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+
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/* request optional power down pin */
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imx258->pwdn_gpio = devm_gpiod_get_optional(&client->dev, "powerdown",
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GPIOD_OUT_HIGH);
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