mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-29 10:08:59 +00:00
62b7f5931c
bcm2708: boot tested on RPi B+ v1.2
bcm2709: boot tested on RPi 3B v1.2 and RPi 4B v1.1 4G
bcm2710: boot tested on RPi 3B v1.2
bcm2711: boot tested on RPi 4B v1.1 4G
Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
(cherry-picked from commit f07e572f64)
62 lines
2.4 KiB
Diff
62 lines
2.4 KiB
Diff
From 47f49370b3c1c7f4d4aae855966d2a3beef6c6d4 Mon Sep 17 00:00:00 2001
|
|
From: Andrey Konovalov <andrey.konovalov@linaro.org>
|
|
Date: Fri, 12 Jun 2020 15:53:48 +0200
|
|
Subject: [PATCH] media: i2c: imx290: fix reset GPIO pin handling
|
|
|
|
Commit 3909a92d7df622b41b9ceeeea694e641cad7667b upstream.
|
|
|
|
According to https://www.kernel.org/doc/Documentation/gpio/consumer.txt,
|
|
|
|
- all of the gpiod_set_value_xxx() functions operate with the *logical*
|
|
value. So in imx290_power_on() the reset signal should be cleared
|
|
(de-asserted) with gpiod_set_value_cansleep(imx290->rst_gpio, 0), and in
|
|
imx290_power_off() the value of 1 must be used to apply/assert the reset
|
|
to the sensor. In the device tree the reset pin is described as
|
|
GPIO_ACTIVE_LOW, and gpiod_set_value_xxx() functions take this into
|
|
account,
|
|
|
|
- when devm_gpiod_get_optional() is called with GPIOD_ASIS, the GPIO is
|
|
not initialized, and the direction must be set later; using a GPIO
|
|
without setting its direction first is illegal and will result in undefined
|
|
behavior. Fix this by using GPIOD_OUT_HIGH instead of GPIOD_ASIS (this
|
|
asserts the reset signal to the sensor initially).
|
|
|
|
Signed-off-by: Andrey Konovalov <andrey.konovalov@linaro.org>
|
|
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
|
|
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
|
|
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
|
|
---
|
|
drivers/media/i2c/imx290.c | 7 ++++---
|
|
1 file changed, 4 insertions(+), 3 deletions(-)
|
|
|
|
--- a/drivers/media/i2c/imx290.c
|
|
+++ b/drivers/media/i2c/imx290.c
|
|
@@ -628,7 +628,7 @@ static int imx290_power_on(struct device
|
|
}
|
|
|
|
usleep_range(1, 2);
|
|
- gpiod_set_value_cansleep(imx290->rst_gpio, 1);
|
|
+ gpiod_set_value_cansleep(imx290->rst_gpio, 0);
|
|
usleep_range(30000, 31000);
|
|
|
|
return 0;
|
|
@@ -641,7 +641,7 @@ static int imx290_power_off(struct devic
|
|
struct imx290 *imx290 = to_imx290(sd);
|
|
|
|
clk_disable_unprepare(imx290->xclk);
|
|
- gpiod_set_value_cansleep(imx290->rst_gpio, 0);
|
|
+ gpiod_set_value_cansleep(imx290->rst_gpio, 1);
|
|
regulator_bulk_disable(IMX290_NUM_SUPPLIES, imx290->supplies);
|
|
|
|
return 0;
|
|
@@ -757,7 +757,8 @@ static int imx290_probe(struct i2c_clien
|
|
goto free_err;
|
|
}
|
|
|
|
- imx290->rst_gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_ASIS);
|
|
+ imx290->rst_gpio = devm_gpiod_get_optional(dev, "reset",
|
|
+ GPIOD_OUT_HIGH);
|
|
if (IS_ERR(imx290->rst_gpio)) {
|
|
dev_err(dev, "Cannot get reset gpio\n");
|
|
ret = PTR_ERR(imx290->rst_gpio);
|