diff options
| author | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2019-10-21 11:02:33 -0700 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2019-10-28 21:01:46 -0700 |
| commit | efd7bb08a762d4f6322054c6824bd942971ac563 (patch) | |
| tree | bbdb0d23c2bd407b98485ef5816b06b750f9ea11 /drivers | |
| parent | 95dc58a9a02f9267cc08199e059329463cfe938c (diff) | |
Input: st1232 - do not reset the chip too early
We should not be putting the chip into reset while interrupts are enabled
and ISR may be running. Fix this by installing a custom devm action and
powering off the device/resetting GPIO line from there. This ensures proper
ordering.
Tested-by: Matthias Fend <Matthias.Fend@wolfvision.net>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/input/touchscreen/st1232.c | 22 |
1 files changed, 12 insertions, 10 deletions
diff --git a/drivers/input/touchscreen/st1232.c b/drivers/input/touchscreen/st1232.c index bb116f41f1c0..bfea02202ded 100644 --- a/drivers/input/touchscreen/st1232.c +++ b/drivers/input/touchscreen/st1232.c @@ -149,6 +149,11 @@ static void st1232_ts_power(struct st1232_ts_data *ts, bool poweron) gpiod_set_value_cansleep(ts->reset_gpio, !poweron); } +static void st1232_ts_power_off(void *data) +{ + st1232_ts_power(data, false); +} + static const struct st_chip_info st1232_chip_info = { .have_z = true, .max_x = 0x31f, /* 800 - 1 */ @@ -229,6 +234,13 @@ static int st1232_ts_probe(struct i2c_client *client, st1232_ts_power(ts, true); + error = devm_add_action_or_reset(&client->dev, st1232_ts_power_off, ts); + if (error) { + dev_err(&client->dev, + "Failed to install power off action: %d\n", error); + return error; + } + input_dev->name = "st1232-touchscreen"; input_dev->id.bustype = BUS_I2C; input_dev->dev.parent = &client->dev; @@ -270,15 +282,6 @@ static int st1232_ts_probe(struct i2c_client *client, return 0; } -static int st1232_ts_remove(struct i2c_client *client) -{ - struct st1232_ts_data *ts = i2c_get_clientdata(client); - - st1232_ts_power(ts, false); - - return 0; -} - static int __maybe_unused st1232_ts_suspend(struct device *dev) { struct i2c_client *client = to_i2c_client(dev); @@ -324,7 +327,6 @@ MODULE_DEVICE_TABLE(of, st1232_ts_dt_ids); static struct i2c_driver st1232_ts_driver = { .probe = st1232_ts_probe, - .remove = st1232_ts_remove, .id_table = st1232_ts_id, .driver = { .name = ST1232_TS_NAME, |