bcm27xx: import latest patches from the RPi foundation

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>

1 files changed, 61 insertions, 0 deletions

diff --git a/target/linux/bcm27xx/patches-5.4/950-0819-media-i2c-imx290-fix-reset-GPIO-pin-handling.patch b/target/linux/bcm27xx/patches-5.4/950-0819-media-i2c-imx290-fix-reset-GPIO-pin-handling.patch
new file mode 100644
index 0000000000..f4c122de93
--- /dev/null
+++ b/target/linux/bcm27xx/patches-5.4/950-0819-media-i2c-imx290-fix-reset-GPIO-pin-handling.patch
@@ -0,0 +1,61 @@
+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);