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| author | Douglas Anderson <dianders@chromium.org> | 2023-02-06 18:48:15 -0800 |
|---|---|---|
| committer | Benjamin Tissoires <benjamin.tissoires@redhat.com> | 2023-02-09 14:44:15 +0100 |
| commit | eb16f59e8e584e94d68098da86e70f9c4e54fa86 (patch) | |
| tree | c8383ec737361dd4b76031036bc38180b72e7124 /drivers/hid | |
| parent | 1d18c1f3b7d938bdefc44289d137b4e6c7a3d502 (diff) | |
| download | lwn-eb16f59e8e584e94d68098da86e70f9c4e54fa86.tar.gz lwn-eb16f59e8e584e94d68098da86e70f9c4e54fa86.zip | |
HID: i2c-hid: goodix: Add mainboard-vddio-supply
As talked about in the patch ("dt-bindings: HID: i2c-hid: goodix: Add
mainboard-vddio-supply") we may need to power up a 1.8V rail on the
host associated with touchscreen IO. Let's add support in the driver
for it.
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Reviewed-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Reviewed-by: Matthias Kaehlcke <mka@chromium.org>
Link: https://lore.kernel.org/r/20230206184744.6.Ic234b931025d1f920ce9e06fff294643943a65ad@changeid
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Diffstat (limited to 'drivers/hid')
| -rw-r--r-- | drivers/hid/i2c-hid/i2c-hid-of-goodix.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/hid/i2c-hid/i2c-hid-of-goodix.c b/drivers/hid/i2c-hid/i2c-hid-of-goodix.c index 584d833dc0aa..0060e3dcd775 100644 --- a/drivers/hid/i2c-hid/i2c-hid-of-goodix.c +++ b/drivers/hid/i2c-hid/i2c-hid-of-goodix.c @@ -26,6 +26,7 @@ struct i2c_hid_of_goodix { struct i2chid_ops ops; struct regulator *vdd; + struct regulator *vddio; struct gpio_desc *reset_gpio; const struct goodix_i2c_hid_timing_data *timings; }; @@ -40,6 +41,10 @@ static int goodix_i2c_hid_power_up(struct i2chid_ops *ops) if (ret) return ret; + ret = regulator_enable(ihid_goodix->vddio); + if (ret) + return ret; + if (ihid_goodix->timings->post_power_delay_ms) msleep(ihid_goodix->timings->post_power_delay_ms); @@ -56,6 +61,7 @@ static void goodix_i2c_hid_power_down(struct i2chid_ops *ops) container_of(ops, struct i2c_hid_of_goodix, ops); gpiod_set_value_cansleep(ihid_goodix->reset_gpio, 1); + regulator_disable(ihid_goodix->vddio); regulator_disable(ihid_goodix->vdd); } @@ -81,6 +87,10 @@ static int i2c_hid_of_goodix_probe(struct i2c_client *client) if (IS_ERR(ihid_goodix->vdd)) return PTR_ERR(ihid_goodix->vdd); + ihid_goodix->vddio = devm_regulator_get(&client->dev, "mainboard-vddio"); + if (IS_ERR(ihid_goodix->vddio)) + return PTR_ERR(ihid_goodix->vddio); + ihid_goodix->timings = device_get_match_data(&client->dev); return i2c_hid_core_probe(client, &ihid_goodix->ops, 0x0001, 0); |