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, 92 insertions, 0 deletions

diff --git a/target/linux/bcm27xx/patches-5.4/950-0150-media-ov5647-Add-support-for-PWDN-GPIO.patch b/target/linux/bcm27xx/patches-5.4/950-0150-media-ov5647-Add-support-for-PWDN-GPIO.patch
new file mode 100644
index 0000000000..24b678f858
--- /dev/null
+++ b/target/linux/bcm27xx/patches-5.4/950-0150-media-ov5647-Add-support-for-PWDN-GPIO.patch
@@ -0,0 +1,92 @@
+From 877bbff2bf6d53104efd1da9caf1e9cfff6f6ef4 Mon Sep 17 00:00:00 2001
+From: Dave Stevenson <dave.stevenson@raspberrypi.org>
+Date: Wed, 31 Oct 2018 14:56:33 +0000
+Subject: [PATCH] media: ov5647: Add support for PWDN GPIO.
+
+Add support for an optional GPIO connected to PWDN on the sensor.
+
+Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
+---
+ drivers/media/i2c/ov5647.c | 28 ++++++++++++++++++++++++++++
+ 1 file changed, 28 insertions(+)
+
+--- a/drivers/media/i2c/ov5647.c
++++ b/drivers/media/i2c/ov5647.c
+@@ -21,6 +21,7 @@
+ 
+ #include <linux/clk.h>
+ #include <linux/delay.h>
++#include <linux/gpio/consumer.h>
+ #include <linux/i2c.h>
+ #include <linux/init.h>
+ #include <linux/io.h>
+@@ -35,6 +36,13 @@
+ 
+ #define SENSOR_NAME "ov5647"
+ 
++/*
++ * From the datasheet, "20ms after PWDN goes low or 20ms after RESETB goes
++ * high if reset is inserted after PWDN goes high, host can access sensor's
++ * SCCB to initialize sensor."
++ */
++#define PWDN_ACTIVE_DELAY_MS	20
++
+ #define MIPI_CTRL00_CLOCK_LANE_GATE		BIT(5)
+ #define MIPI_CTRL00_BUS_IDLE			BIT(2)
+ #define MIPI_CTRL00_CLOCK_LANE_DISABLE		BIT(0)
+@@ -86,6 +94,7 @@ struct ov5647 {
+ 	unsigned int			height;
+ 	int				power_count;
+ 	struct clk			*xclk;
++	struct gpio_desc		*pwdn;
+ };
+ 
+ static inline struct ov5647 *to_state(struct v4l2_subdev *sd)
+@@ -355,6 +364,11 @@ static int ov5647_sensor_power(struct v4
+ 	if (on && !ov5647->power_count)	{
+ 		dev_dbg(&client->dev, "OV5647 power on\n");
+ 
++		if (ov5647->pwdn) {
++			gpiod_set_value(ov5647->pwdn, 0);
++			msleep(PWDN_ACTIVE_DELAY_MS);
++		}
++
+ 		ret = clk_prepare_enable(ov5647->xclk);
+ 		if (ret < 0) {
+ 			dev_err(&client->dev, "clk prepare enable failed\n");
+@@ -392,6 +406,8 @@ static int ov5647_sensor_power(struct v4
+ 			dev_dbg(&client->dev, "soft stby failed\n");
+ 
+ 		clk_disable_unprepare(ov5647->xclk);
++
++		gpiod_set_value(ov5647->pwdn, 1);
+ 	}
+ 
+ 	/* Update the power count. */
+@@ -603,6 +619,10 @@ static int ov5647_probe(struct i2c_clien
+ 		return -EINVAL;
+ 	}
+ 
++	/* Request the power down GPIO asserted */
++	sensor->pwdn = devm_gpiod_get_optional(&client->dev, "pwdn",
++					       GPIOD_OUT_HIGH);
++
+ 	mutex_init(&sensor->lock);
+ 
+ 	sd = &sensor->sd;
+@@ -616,7 +636,15 @@ static int ov5647_probe(struct i2c_clien
+ 	if (ret < 0)
+ 		goto mutex_remove;
+ 
++	if (sensor->pwdn) {
++		gpiod_set_value(sensor->pwdn, 0);
++		msleep(PWDN_ACTIVE_DELAY_MS);
++	}
++
+ 	ret = ov5647_detect(sd);
++
++	gpiod_set_value(sensor->pwdn, 1);
++
+ 	if (ret < 0)
+ 		goto error;
+