diff options
Diffstat (limited to 'bsp/meta-rcar/meta-rcar-gen3-adas/recipes-kernel/linux/linux-renesas/0482-media-i2c-max9286-ti9x4-power-down-POCs-on-reboot.patch')
| -rw-r--r-- | bsp/meta-rcar/meta-rcar-gen3-adas/recipes-kernel/linux/linux-renesas/0482-media-i2c-max9286-ti9x4-power-down-POCs-on-reboot.patch | 139 |
1 files changed, 139 insertions, 0 deletions
diff --git a/bsp/meta-rcar/meta-rcar-gen3-adas/recipes-kernel/linux/linux-renesas/0482-media-i2c-max9286-ti9x4-power-down-POCs-on-reboot.patch b/bsp/meta-rcar/meta-rcar-gen3-adas/recipes-kernel/linux/linux-renesas/0482-media-i2c-max9286-ti9x4-power-down-POCs-on-reboot.patch new file mode 100644 index 00000000..ab493586 --- /dev/null +++ b/bsp/meta-rcar/meta-rcar-gen3-adas/recipes-kernel/linux/linux-renesas/0482-media-i2c-max9286-ti9x4-power-down-POCs-on-reboot.patch @@ -0,0 +1,139 @@ +From cc34c21f572727e49f69e10b761bc44d3addf520 Mon Sep 17 00:00:00 2001 +From: Vladimir Barinov <vladimir.barinov@cogentembedded.com> +Date: Wed, 4 Mar 2020 17:32:44 +0300 +Subject: [PATCH] media: i2c: max9286,ti9x4: power down POCs on reboot + +Power down all POCs on reboot/shutdown/halt + +Signed-off-by: Vladimir Barinov <vladimir.barinov@cogentembedded.com> +--- + drivers/media/i2c/soc_camera/max9286.c | 23 +++++++++++++++++++++++ + drivers/media/i2c/soc_camera/ti9x4.c | 22 ++++++++++++++++++++++ + 2 files changed, 45 insertions(+) + +diff --git a/drivers/media/i2c/soc_camera/max9286.c b/drivers/media/i2c/soc_camera/max9286.c +index 343b8ab..05247ff 100644 +--- a/drivers/media/i2c/soc_camera/max9286.c ++++ b/drivers/media/i2c/soc_camera/max9286.c +@@ -15,6 +15,7 @@ + #include <linux/notifier.h> + #include <linux/of_gpio.h> + #include <linux/of_graph.h> ++#include <linux/reboot.h> + #include <linux/videodev2.h> + + #include <media/v4l2-common.h> +@@ -71,6 +72,7 @@ struct max9286_priv { + int max9271_addr_map[4]; + int ser_id; + struct gpio_desc *poc_gpio[4]; /* PoC power supply */ ++ struct notifier_block reboot_notifier; + + /* link statistic */ + int prbserr[4]; +@@ -643,6 +645,19 @@ static int max9286_registered_async(struct v4l2_subdev *sd) + return 0; + } + ++static int max9286_reboot_notifier(struct notifier_block *nb, unsigned long event, void *buf) ++{ ++ struct max9286_priv *priv = container_of(nb, struct max9286_priv, reboot_notifier); ++ int idx; ++ ++ for (idx = 0; idx < priv->links; idx++) { ++ if (!IS_ERR(priv->poc_gpio[idx])) ++ gpiod_direction_output(priv->poc_gpio[idx], 0); /* POC power off */ ++ } ++ ++ return NOTIFY_OK; ++} ++ + static struct v4l2_subdev_core_ops max9286_subdev_core_ops = { + #ifdef CONFIG_VIDEO_ADV_DEBUG + .g_register = max9286_g_register, +@@ -996,6 +1011,13 @@ static int max9286_probe(struct i2c_client *client, + goto out; + } + ++ priv->reboot_notifier.notifier_call = max9286_reboot_notifier; ++ err = register_reboot_notifier(&priv->reboot_notifier); ++ if (err) { ++ dev_err(&client->dev, "failed to register reboot notifier\n"); ++ goto out; ++ } ++ + err = sysfs_create_group(&client->dev.kobj, + &max9286_group); + if (err < 0) +@@ -1010,6 +1032,7 @@ static int max9286_remove(struct i2c_client *client) + int i; + + sysfs_remove_group(&client->dev.kobj, &max9286_group); ++ unregister_reboot_notifier(&priv->reboot_notifier); + + for (i = 0; i < 4; i++) { + v4l2_async_unregister_subdev(&priv->sd[i]); +diff --git a/drivers/media/i2c/soc_camera/ti9x4.c b/drivers/media/i2c/soc_camera/ti9x4.c +index 9004bb1..627612a 100644 +--- a/drivers/media/i2c/soc_camera/ti9x4.c ++++ b/drivers/media/i2c/soc_camera/ti9x4.c +@@ -15,6 +15,7 @@ + #include <linux/notifier.h> + #include <linux/of_gpio.h> + #include <linux/of_graph.h> ++#include <linux/reboot.h> + #include <linux/videodev2.h> + + #include <media/v4l2-common.h> +@@ -52,6 +53,7 @@ struct ti9x4_priv { + struct gpio_desc *pwen; /* chip power en */ + struct gpio_desc *poc_gpio[4]; /* PoC power supply */ + struct v4l2_clk *ref_clk; /* ref clock */ ++ struct notifier_block reboot_notifier; + }; + + static int ser_id; +@@ -420,6 +422,19 @@ static int ti9x4_registered_async(struct v4l2_subdev *sd) + return 0; + } + ++static int ti9x4_reboot_notifier(struct notifier_block *nb, unsigned long event, void *buf) ++{ ++ struct ti9x4_priv *priv = container_of(nb, struct ti9x4_priv, reboot_notifier); ++ int idx; ++ ++ for (idx = 0; idx < priv->links; idx++) { ++ if (!IS_ERR(priv->poc_gpio[idx])) ++ gpiod_direction_output(priv->poc_gpio[idx], 0); /* POC power off */ ++ } ++ ++ return NOTIFY_OK; ++} ++ + static struct v4l2_subdev_core_ops ti9x4_subdev_core_ops = { + #ifdef CONFIG_VIDEO_ADV_DEBUG + .g_register = ti9x4_g_register, +@@ -676,6 +691,11 @@ static int ti9x4_probe(struct i2c_client *client, + goto out; + } + ++ priv->reboot_notifier.notifier_call = ti9x4_reboot_notifier; ++ err = register_reboot_notifier(&priv->reboot_notifier); ++ if (err) ++ dev_err(&client->dev, "failed to register reboot notifier\n"); ++ + out: + return err; + } +@@ -685,6 +705,8 @@ static int ti9x4_remove(struct i2c_client *client) + struct ti9x4_priv *priv = i2c_get_clientdata(client); + int i; + ++ unregister_reboot_notifier(&priv->reboot_notifier); ++ + for (i = 0; i < priv->links; i++) { + v4l2_async_unregister_subdev(&priv->sd[i]); + v4l2_device_unregister_subdev(&priv->sd[i]); +-- +2.7.4 + |