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authorDouglas Anderson <dianders@chromium.org>2023-02-07 05:48:15 +0300
committerBenjamin Tissoires <benjamin.tissoires@redhat.com>2023-02-09 16:44:15 +0300
commiteb16f59e8e584e94d68098da86e70f9c4e54fa86 (patch)
treec8383ec737361dd4b76031036bc38180b72e7124 /drivers/hid/i2c-hid
parent1d18c1f3b7d938bdefc44289d137b4e6c7a3d502 (diff)
downloadlinux-eb16f59e8e584e94d68098da86e70f9c4e54fa86.tar.xz
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/i2c-hid')
-rw-r--r--drivers/hid/i2c-hid/i2c-hid-of-goodix.c10
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);