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