diff options
| author | Hans de Goede <hdegoede@redhat.com> | 2024-11-28 16:23:37 +0100 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab+huawei@kernel.org> | 2024-12-19 12:50:17 +0100 |
| commit | fa3772f390c6aed371639c35383ceb4025597af1 (patch) | |
| tree | c9bdad0bdcbf981bec578033d561b8ccbc8402c6 | |
| parent | 17898af922834cf2673896715d9495b34ab70677 (diff) | |
media: ov2740: Add powerdown GPIO support
The ov2740 sensor has both reset and power_down inputs according to
the datasheet one or the other should always be tied to DOVDD but on
some designs both are attached to GPIOs.
Add support for controlling both a reset and a powerdown GPIO.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Tested-by: Stanislaw Gruszka <stanislaw.gruszka@linux.intel.com>
Acked-by: Ricardo Ribalda <ribalda@chromium.org>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
| -rw-r--r-- | drivers/media/i2c/ov2740.c | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/drivers/media/i2c/ov2740.c b/drivers/media/i2c/ov2740.c index e9c6c4b5aef1..5ebee8d03e67 100644 --- a/drivers/media/i2c/ov2740.c +++ b/drivers/media/i2c/ov2740.c @@ -525,6 +525,7 @@ struct ov2740 { /* GPIOs, clocks */ struct gpio_desc *reset_gpio; + struct gpio_desc *powerdown_gpio; struct clk *clk; /* Current mode */ @@ -1306,6 +1307,7 @@ static int ov2740_suspend(struct device *dev) struct ov2740 *ov2740 = to_ov2740(sd); gpiod_set_value_cansleep(ov2740->reset_gpio, 1); + gpiod_set_value_cansleep(ov2740->powerdown_gpio, 1); clk_disable_unprepare(ov2740->clk); return 0; } @@ -1320,6 +1322,7 @@ static int ov2740_resume(struct device *dev) if (ret) return ret; + gpiod_set_value_cansleep(ov2740->powerdown_gpio, 0); gpiod_set_value_cansleep(ov2740->reset_gpio, 0); msleep(20); @@ -1348,9 +1351,17 @@ static int ov2740_probe(struct i2c_client *client) if (IS_ERR(ov2740->reset_gpio)) { return dev_err_probe(dev, PTR_ERR(ov2740->reset_gpio), "failed to get reset GPIO\n"); - } else if (ov2740->reset_gpio) { + } + + ov2740->powerdown_gpio = devm_gpiod_get_optional(dev, "powerdown", GPIOD_OUT_HIGH); + if (IS_ERR(ov2740->powerdown_gpio)) { + return dev_err_probe(dev, PTR_ERR(ov2740->powerdown_gpio), + "failed to get powerdown GPIO\n"); + } + + if (ov2740->reset_gpio || ov2740->powerdown_gpio) { /* - * Ensure reset is asserted for at least 20 ms before + * Ensure reset/powerdown is asserted for at least 20 ms before * ov2740_resume() deasserts it. */ msleep(20); |