diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.14/950-0323-ov5647-Add-support-for-PWDN-GPIO.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.14/950-0323-ov5647-Add-support-for-PWDN-GPIO.patch | 92 |
1 files changed, 0 insertions, 92 deletions
diff --git a/target/linux/brcm2708/patches-4.14/950-0323-ov5647-Add-support-for-PWDN-GPIO.patch b/target/linux/brcm2708/patches-4.14/950-0323-ov5647-Add-support-for-PWDN-GPIO.patch deleted file mode 100644 index 0224698697..0000000000 --- a/target/linux/brcm2708/patches-4.14/950-0323-ov5647-Add-support-for-PWDN-GPIO.patch +++ /dev/null @@ -1,92 +0,0 @@ -From 34220db79008820c110473fe804cf02af3037889 Mon Sep 17 00:00:00 2001 -From: Dave Stevenson <dave.stevenson@raspberrypi.org> -Date: Thu, 18 May 2017 15:42:34 +0100 -Subject: [PATCH 323/454] 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 OV5647_SW_RESET 0x0103 - #define OV5647_REG_CHIPID_H 0x300A - #define OV5647_REG_CHIPID_L 0x300B -@@ -77,6 +85,7 @@ 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) -@@ -334,6 +343,11 @@ 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"); -@@ -371,6 +385,8 @@ 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. */ -@@ -583,6 +599,10 @@ 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; -@@ -596,7 +616,15 @@ 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; - |