From: Srinivas Kandagatla <srinivas.kandagatla@xxxxxxxxxx>
Some of the external muxes needs powering up using a regulator.
This is the case with Lenovo T14s laptop which has a external audio mux
to handle US/EURO headsets.
Add support to the driver to handle this optional regulator.
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@xxxxxxxxxx>
---
drivers/mux/gpio.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/drivers/mux/gpio.c b/drivers/mux/gpio.c
index cc5f2c1861d4..12cd9b5c32fb 100644
--- a/drivers/mux/gpio.c
+++ b/drivers/mux/gpio.c
@@ -15,6 +15,7 @@
#include <linux/mux/driver.h>
#include <linux/platform_device.h>
#include <linux/property.h>
+#include <linux/regulator/consumer.h>
struct mux_gpio {
struct gpio_descs *gpios;
@@ -82,6 +83,13 @@ static int mux_gpio_probe(struct platform_device *pdev)
mux_chip->mux->idle_state = idle_state;
}
+ ret = devm_regulator_get_enable_optional(dev, "mux");
+ if (ret && ret != -ENODEV) {
+ if (ret != -EPROBE_DEFER)
+ dev_err(dev, "Couldn't retrieve/enable gpio mux supply\n");
+ return ret;
+ }
This seems like a good place to use return dev_err_probe()
+
ret = devm_mux_chip_register(dev, mux_chip);
if (ret < 0)
return ret;
--
2.39.5
Kind regards,
Maud
