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input: touchscreen: mxt: refine power on/off flow

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Refine driver's power on/off flow and make regulators' state
to be proper in all scenes.

Change-Id: I5d26c3134dfbdc53037fe4aac16739b24c0c183b
Signed-off-by: Fei Mao <feim1@codeaurora.org>
This commit is contained in:
Fei Mao 2020-10-15 17:25:37 +08:00
commit d35c6d58eb
1 changed files with 10 additions and 2 deletions
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12
drivers/input/touchscreen/atmel_mxt_ts.c
View file

@ -378,6 +378,7 @@ struct mxt_data {
enum mxt_suspend_mode suspend_mode;
bool use_regulator;
bool poweron;
struct regulator *reg_vdd;
struct regulator *reg_avdd;
struct regulator *reg_xvdd;
@ -458,7 +459,7 @@ static int mxt_wait_for_completion(struct mxt_data *data,
if (ret < 0) {
return ret;
} else if (ret == 0) {
dev_err(dev, "Wait for completion timed out.\n");
dev_dbg(dev, "Wait for completion timed out.\n");
return -ETIMEDOUT;
}
return 0;
@ -1983,7 +1984,7 @@ static int mxt_regulator_enable(struct mxt_data *data)
{
int error;
if (!data->use_regulator)
if (!data->use_regulator || data->poweron)
return 0;
gpiod_set_value(data->reset_gpio, 0);
@ -2015,6 +2016,7 @@ static int mxt_regulator_enable(struct mxt_data *data)
gpiod_set_value(data->reset_gpio, 1);
mxt_wait_for_completion(data, &data->bl_completion, MXT_POWERON_DELAY);
data->poweron = true;
return 0;
err_dis_avdd:
@ -2026,10 +2028,15 @@ err_dis_vdd:
static void mxt_regulator_disable(struct mxt_data *data)
{
if (!data->poweron)
return;
regulator_disable(data->reg_vdd);
regulator_disable(data->reg_avdd);
if (!IS_ERR(data->reg_xvdd))
regulator_disable(data->reg_xvdd);
data->poweron = false;
}
static int mxt_regulator_configure(struct mxt_data *data, bool state)
@ -2994,6 +3001,7 @@ static int mxt_configure_objects(struct mxt_data *data,
dev_warn(dev, "No touch object detected\n");
}
disable_irq(data->irq);
mxt_debug_init(data);
return 0;