usb: typec: tcpci: add regulator support

The tcpci chip vbus pin is possibly driven by an regulator. This patch
is adding support to enable an optional vdd regulator before probing.

Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de>
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Link: https://lore.kernel.org/r/20250404-ml-topic-tcpci-v1-1-4442c7d0ee1e@pengutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/typec/tcpm/tcpci.c b/drivers/usb/typec/tcpm/tcpci.c
index 19ab6647af706b0112440dcfebb47c996a31438c..a56e31b20c214fc509423d2f8602d3599c1dd2c1 100644 (file)
--- a/drivers/usb/typec/tcpm/tcpci.c
+++ b/drivers/usb/typec/tcpm/tcpci.c
@@ -17,6 +17,7 @@
 #include <linux/usb/tcpci.h>
 #include <linux/usb/tcpm.h>
 #include <linux/usb/typec.h>
+#include <linux/regulator/consumer.h>
 
 #define        PD_RETRY_COUNT_DEFAULT                  3
 #define        PD_RETRY_COUNT_3_0_OR_HIGHER            2
@@ -905,6 +906,10 @@ static int tcpci_probe(struct i2c_client *client)
        int err;
        u16 val = 0;
 
+       err = devm_regulator_get_enable_optional(&client->dev, "vdd");
+       if (err && err != -ENODEV)
+               return dev_err_probe(&client->dev, err, "Failed to get regulator\n");
+
        chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL);
        if (!chip)
                return -ENOMEM;