build/patch/kernel/archive/sunxi-6.4/patches.megous/iio-stk3310-Implement-vdd-supply-and-power-it-off-during-suspen.patch

131 lines
3.4 KiB
Diff

From 8aadcd1e2b8568fc20887656cf619f0212490904 Mon Sep 17 00:00:00 2001
From: Ondrej Jirman <megi@xff.cz>
Date: Sat, 20 May 2023 16:49:36 +0200
Subject: [PATCH 114/469] iio: stk3310: Implement vdd supply and power it off
during suspend
VDD power input can be used to completely power off the chip during
system suspend. Do so if available.
Signed-off-by: Ondrej Jirman <megi@xff.cz>
---
drivers/iio/light/stk3310.c | 48 ++++++++++++++++++++++++++++++++++---
1 file changed, 45 insertions(+), 3 deletions(-)
diff --git a/drivers/iio/light/stk3310.c b/drivers/iio/light/stk3310.c
index 48ae6ff0015e..df5bf148ffe5 100644
--- a/drivers/iio/light/stk3310.c
+++ b/drivers/iio/light/stk3310.c
@@ -16,6 +16,7 @@
#include <linux/iio/events.h>
#include <linux/iio/iio.h>
#include <linux/iio/sysfs.h>
+#include <linux/regulator/consumer.h>
#define STK3310_REG_STATE 0x00
#define STK3310_REG_PSCTRL 0x01
@@ -117,6 +118,7 @@ struct stk3310_data {
struct regmap_field *reg_int_ps;
struct regmap_field *reg_flag_psint;
struct regmap_field *reg_flag_nf;
+ struct regulator *vdd_reg;
};
static const struct iio_event_spec stk3310_events[] = {
@@ -607,6 +609,11 @@ static int stk3310_probe(struct i2c_client *client)
mutex_init(&data->lock);
+ data->vdd_reg = devm_regulator_get_optional(&client->dev, "vdd");
+ if (IS_ERR(data->vdd_reg))
+ return dev_err_probe(&client->dev, PTR_ERR(data->vdd_reg),
+ "get regulator vdd failed\n");
+
ret = stk3310_regmap_init(data);
if (ret < 0)
return ret;
@@ -617,9 +624,16 @@ static int stk3310_probe(struct i2c_client *client)
indio_dev->channels = stk3310_channels;
indio_dev->num_channels = ARRAY_SIZE(stk3310_channels);
+ if (data->vdd_reg) {
+ ret = regulator_enable(data->vdd_reg);
+ if (ret)
+ return dev_err_probe(&client->dev, ret,
+ "regulator vdd enable failed\n");
+ }
+
ret = stk3310_init(indio_dev);
if (ret < 0)
- return ret;
+ goto err_vdd_disable;
if (client->irq > 0) {
ret = devm_request_threaded_irq(&client->dev, client->irq,
@@ -645,32 +659,60 @@ static int stk3310_probe(struct i2c_client *client)
err_standby:
stk3310_set_state(data, STK3310_STATE_STANDBY);
+err_vdd_disable:
+ if (data->vdd_reg)
+ regulator_disable(data->vdd_reg);
return ret;
}
static void stk3310_remove(struct i2c_client *client)
{
struct iio_dev *indio_dev = i2c_get_clientdata(client);
+ struct stk3310_data *data = iio_priv(indio_dev);
iio_device_unregister(indio_dev);
stk3310_set_state(iio_priv(indio_dev), STK3310_STATE_STANDBY);
+ if (data->vdd_reg)
+ regulator_disable(data->vdd_reg);
}
static int stk3310_suspend(struct device *dev)
{
struct stk3310_data *data;
+ int ret;
data = iio_priv(i2c_get_clientdata(to_i2c_client(dev)));
- return stk3310_set_state(data, STK3310_STATE_STANDBY);
+ ret = stk3310_set_state(data, STK3310_STATE_STANDBY);
+ if (ret)
+ return ret;
+
+ if (data->vdd_reg) {
+ regcache_mark_dirty(data->regmap);
+ regulator_disable(data->vdd_reg);
+ }
+
+ return 0;
}
static int stk3310_resume(struct device *dev)
{
- u8 state = 0;
struct stk3310_data *data;
+ u8 state = 0;
+ int ret;
data = iio_priv(i2c_get_clientdata(to_i2c_client(dev)));
+
+ if (data->vdd_reg) {
+ ret = regulator_enable(data->vdd_reg);
+ if (ret) {
+ dev_err(dev, "Failed to re-enable regulator vdd\n");
+ return ret;
+ }
+
+ regcache_sync(data->regmap);
+ }
+
if (data->ps_enabled)
state |= STK3310_STATE_EN_PS;
if (data->als_enabled)
--
2.34.1