On Tue, Mar 20, 2018 at 03:31:25PM -0700, Dmitry Torokhov wrote:
> The way we are supposed to put controller to sleep and wake it up does not
> depend on the platform, but rather on controller itself, so we want to get
> rid of suspend mode in platform data (and eventually get rid of platform
> data completely). Unfortunately some early chromebooks (the original Pixel,
> Acer C720) were shipped with config that requires manually re-enabling
> touch reporting in T9. We will sort it out, but in the meantime let's
> switch to a simple DMI quirk.
>
> We'll keep pdata->suspend_mode for now and remove it when we rework
> chromeos-laptop driver.
>
> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx>
Applied, thanks.
> ---
> drivers/input/touchscreen/atmel_mxt_ts.c | 27 +++++++++++++++++++-----
> 1 file changed, 22 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/input/touchscreen/atmel_mxt_ts.c b/drivers/input/touchscreen/atmel_mxt_ts.c
> index 7659bc48f1db8..20e1224d1a6db 100644
> --- a/drivers/input/touchscreen/atmel_mxt_ts.c
> +++ b/drivers/input/touchscreen/atmel_mxt_ts.c
> @@ -324,6 +324,8 @@ struct mxt_data {
>
> /* for config update handling */
> struct completion crc_completion;
> +
> + enum mxt_suspend_mode suspend_mode;
> };
>
> struct mxt_vb2_buffer {
> @@ -2868,7 +2870,7 @@ static const struct attribute_group mxt_attr_group = {
>
> static void mxt_start(struct mxt_data *data)
> {
> - switch (data->pdata->suspend_mode) {
> + switch (data->suspend_mode) {
> case MXT_SUSPEND_T9_CTRL:
> mxt_soft_reset(data);
>
> @@ -2886,12 +2888,11 @@ static void mxt_start(struct mxt_data *data)
> mxt_t6_command(data, MXT_COMMAND_CALIBRATE, 1, false);
> break;
> }
> -
> }
>
> static void mxt_stop(struct mxt_data *data)
> {
> - switch (data->pdata->suspend_mode) {
> + switch (data->suspend_mode) {
> case MXT_SUSPEND_T9_CTRL:
> /* Touch disable */
> mxt_write_object(data,
> @@ -2954,8 +2955,6 @@ static const struct mxt_platform_data *mxt_parse_dt(struct i2c_client *client)
> pdata->t19_keymap = keymap;
> }
>
> - pdata->suspend_mode = MXT_SUSPEND_DEEP_SLEEP;
> -
> return pdata;
> }
> #else
> @@ -3109,6 +3108,21 @@ mxt_get_platform_data(struct i2c_client *client)
> return ERR_PTR(-EINVAL);
> }
>
> +static const struct dmi_system_id chromebook_T9_suspend_dmi[] = {
> + {
> + .matches = {
> + DMI_MATCH(DMI_SYS_VENDOR, "GOOGLE"),
> + DMI_MATCH(DMI_PRODUCT_NAME, "Link"),
> + },
> + },
> + {
> + .matches = {
> + DMI_MATCH(DMI_PRODUCT_NAME, "Peppy"),
> + },
> + },
> + { }
> +};
> +
> static int mxt_probe(struct i2c_client *client, const struct i2c_device_id *id)
> {
> struct mxt_data *data;
> @@ -3135,6 +3149,9 @@ static int mxt_probe(struct i2c_client *client, const struct i2c_device_id *id)
> init_completion(&data->reset_completion);
> init_completion(&data->crc_completion);
>
> + data->suspend_mode = dmi_check_system(chromebook_T9_suspend_dmi) ?
> + MXT_SUSPEND_T9_CTRL : MXT_SUSPEND_DEEP_SLEEP;
> +
> data->reset_gpio = devm_gpiod_get_optional(&client->dev,
> "reset", GPIOD_OUT_LOW);
> if (IS_ERR(data->reset_gpio)) {
> --
> 2.16.2.804.g6dcf76e118-goog
>
--
Benson Leung
Staff Software Engineer
Chrome OS Kernel
Google Inc.
bleung@xxxxxxxxxx
Chromium OS Project
bleung@xxxxxxxxxxxx
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