mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-20 14:13:16 +00:00
109 lines
3.0 KiB
Diff
109 lines
3.0 KiB
Diff
|
From 159ef6a1740ded1bfd542bab7d69208cf0865814 Mon Sep 17 00:00:00 2001
|
||
|
|
From: Yassine Oudjana <y.oudjana@protonmail.com>
|
||
|
|
Date: Fri, 9 Dec 2022 17:37:41 +0300
|
||
|
|
Subject: [PATCH] media: i2c: ak7375: Add regulator management
|
||
|
|
|
||
|
|
commit 90f7e76eac50c1ae54a445abc6a286837ade46cf upstream
|
||
|
|
|
||
|
|
Make the driver get needed regulators on probe and enable/disable
|
||
|
|
them on runtime PM callbacks.
|
||
|
|
|
||
|
|
Signed-off-by: Yassine Oudjana <y.oudjana@protonmail.com>
|
||
|
|
Tested-by: Umang Jain <umang.jain@ideasonboard.com>
|
||
|
|
---
|
||
|
|
drivers/media/i2c/ak7375.c | 38 ++++++++++++++++++++++++++++++++++++++
|
||
|
|
1 file changed, 38 insertions(+)
|
||
|
|
|
||
|
|
--- a/drivers/media/i2c/ak7375.c
|
||
|
|
+++ b/drivers/media/i2c/ak7375.c
|
||
|
|
@@ -6,6 +6,7 @@
|
||
|
|
#include <linux/i2c.h>
|
||
|
|
#include <linux/module.h>
|
||
|
|
#include <linux/pm_runtime.h>
|
||
|
|
+#include <linux/regulator/consumer.h>
|
||
|
|
#include <media/v4l2-ctrls.h>
|
||
|
|
#include <media/v4l2-device.h>
|
||
|
|
|
||
|
|
@@ -23,17 +24,29 @@
|
||
|
|
*/
|
||
|
|
#define AK7375_CTRL_STEPS 64
|
||
|
|
#define AK7375_CTRL_DELAY_US 1000
|
||
|
|
+/*
|
||
|
|
+ * The vcm may take up 10 ms (tDELAY) to power on and start taking
|
||
|
|
+ * I2C messages. Based on AK7371 datasheet.
|
||
|
|
+ */
|
||
|
|
+#define AK7375_POWER_DELAY_US 10000
|
||
|
|
|
||
|
|
#define AK7375_REG_POSITION 0x0
|
||
|
|
#define AK7375_REG_CONT 0x2
|
||
|
|
#define AK7375_MODE_ACTIVE 0x0
|
||
|
|
#define AK7375_MODE_STANDBY 0x40
|
||
|
|
|
||
|
|
+static const char * const ak7375_supply_names[] = {
|
||
|
|
+ "vdd",
|
||
|
|
+ "vio",
|
||
|
|
+};
|
||
|
|
+
|
||
|
|
/* ak7375 device structure */
|
||
|
|
struct ak7375_device {
|
||
|
|
struct v4l2_ctrl_handler ctrls_vcm;
|
||
|
|
struct v4l2_subdev sd;
|
||
|
|
struct v4l2_ctrl *focus;
|
||
|
|
+ struct regulator_bulk_data supplies[ARRAY_SIZE(ak7375_supply_names)];
|
||
|
|
+
|
||
|
|
/* active or standby mode */
|
||
|
|
bool active;
|
||
|
|
};
|
||
|
|
@@ -133,12 +146,24 @@ static int ak7375_probe(struct i2c_clien
|
||
|
|
{
|
||
|
|
struct ak7375_device *ak7375_dev;
|
||
|
|
int ret;
|
||
|
|
+ unsigned int i;
|
||
|
|
|
||
|
|
ak7375_dev = devm_kzalloc(&client->dev, sizeof(*ak7375_dev),
|
||
|
|
GFP_KERNEL);
|
||
|
|
if (!ak7375_dev)
|
||
|
|
return -ENOMEM;
|
||
|
|
|
||
|
|
+ for (i = 0; i < ARRAY_SIZE(ak7375_supply_names); i++)
|
||
|
|
+ ak7375_dev->supplies[i].supply = ak7375_supply_names[i];
|
||
|
|
+
|
||
|
|
+ ret = devm_regulator_bulk_get(&client->dev,
|
||
|
|
+ ARRAY_SIZE(ak7375_supply_names),
|
||
|
|
+ ak7375_dev->supplies);
|
||
|
|
+ if (ret) {
|
||
|
|
+ dev_err_probe(&client->dev, ret, "Failed to get regulators\n");
|
||
|
|
+ return ret;
|
||
|
|
+ }
|
||
|
|
+
|
||
|
|
v4l2_i2c_subdev_init(&ak7375_dev->sd, client, &ak7375_ops);
|
||
|
|
ak7375_dev->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
|
||
|
|
ak7375_dev->sd.internal_ops = &ak7375_int_ops;
|
||
|
|
@@ -208,6 +233,11 @@ static int __maybe_unused ak7375_vcm_sus
|
||
|
|
if (ret)
|
||
|
|
dev_err(dev, "%s I2C failure: %d\n", __func__, ret);
|
||
|
|
|
||
|
|
+ ret = regulator_bulk_disable(ARRAY_SIZE(ak7375_supply_names),
|
||
|
|
+ ak7375_dev->supplies);
|
||
|
|
+ if (ret)
|
||
|
|
+ return ret;
|
||
|
|
+
|
||
|
|
ak7375_dev->active = false;
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
@@ -228,6 +258,14 @@ static int __maybe_unused ak7375_vcm_res
|
||
|
|
if (ak7375_dev->active)
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
+ ret = regulator_bulk_enable(ARRAY_SIZE(ak7375_supply_names),
|
||
|
|
+ ak7375_dev->supplies);
|
||
|
|
+ if (ret)
|
||
|
|
+ return ret;
|
||
|
|
+
|
||
|
|
+ /* Wait for vcm to become ready */
|
||
|
|
+ usleep_range(AK7375_POWER_DELAY_US, AK7375_POWER_DELAY_US + 500);
|
||
|
|
+
|
||
|
|
ret = ak7375_i2c_write(ak7375_dev, AK7375_REG_CONT,
|
||
|
|
AK7375_MODE_ACTIVE, 1);
|
||
|
|
if (ret) {
|