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input: synaptics_dsx: enter touch LPM in suspend

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S332U needs to pull down the reset pin after it enters onto
sleep mode to ensure the LPM is enabled.

Change-Id: Ia8d8c1e788eb7d3524df979ad2d9e17ee15c26f2
Signed-off-by: Mao Li <maol@codeaurora.org>
This commit is contained in:
Mao Li 2015-12-21 17:18:18 +08:00 • committed by David Keitel
parent 549e2df905
commit c91a3304c1
1 changed files with 18 additions and 6 deletions
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24
drivers/input/touchscreen/synaptics_dsx/synaptics_dsx_core.c
View file

@ -3132,8 +3132,10 @@ static int synaptics_dsx_gpio_configure(struct synaptics_rmi4_data *rmi4_data,
bool on)
{
int retval = 0;
struct synaptics_rmi4_device_info *rmi;
const struct synaptics_dsx_board_data *bdata =
rmi4_data->hw_if->board_data;
rmi = &(rmi4_data->rmi4_mod_info);
if (on) {
if (gpio_is_valid(bdata->irq_gpio)) {
@ -3194,12 +3196,22 @@ static int synaptics_dsx_gpio_configure(struct synaptics_rmi4_data *rmi4_data,
* fails, only leakage current will be more but
* functionality will not be affected.
*/
retval = gpio_direction_input(
bdata->reset_gpio);
if (retval) {
dev_err(rmi4_data->pdev->dev.parent,
"unable to set direction for gpio "
"[%d]\n", bdata->irq_gpio);
if (rmi->package_id ==
SYNA_S332U_PACKAGE_ID &&
rmi->package_id_rev ==
SYNA_S332U_PACKAGE_ID_REV) {
gpio_set_value(bdata->
reset_gpio,
0);
} else {
retval = gpio_direction_input(
bdata->reset_gpio);
if (retval) {
dev_err(rmi4_data->pdev->
dev.parent,
"unable to set direction for gpio [%d]\n",
bdata->irq_gpio);
}
}
gpio_free(bdata->reset_gpio);
}