From 4d7201cda226d7cffb591d94ca66ca0960891126 Mon Sep 17 00:00:00 2001 From: Marco Felsch Date: Tue, 17 Sep 2019 16:44:47 +0200 Subject: usb: usb251xb: add vdd supply support Currently we don't handle the supply. We need to add the supply support to be able to switch the supply off e.g. during a suspend-to-ram operation. So we can guarantee a correct (re-)initialization. Signed-off-by: Marco Felsch Reviewed-by: Richard Leitner Tested-by: Richard Leitner Link: https://lore.kernel.org/r/20190917144449.32739-3-m.felsch@pengutronix.de Signed-off-by: Greg Kroah-Hartman --- drivers/usb/misc/usb251xb.c | 10 ++++++++++ 1 file changed, 10 insertions(+) (limited to 'drivers/usb/misc') diff --git a/drivers/usb/misc/usb251xb.c b/drivers/usb/misc/usb251xb.c index 6ca9111d150a..05819167604d 100644 --- a/drivers/usb/misc/usb251xb.c +++ b/drivers/usb/misc/usb251xb.c @@ -17,6 +17,7 @@ #include #include #include +#include #include /* Internal Register Set Addresses & Default Values acc. to DS00001692C */ @@ -116,6 +117,7 @@ struct usb251xb { struct device *dev; struct i2c_client *i2c; + struct regulator *vdd; u8 skip_config; struct gpio_desc *gpio_reset; u16 vendor_id; @@ -420,6 +422,10 @@ static int usb251xb_get_ofdata(struct usb251xb *hub, return err; } + hub->vdd = devm_regulator_get(dev, "vdd"); + if (IS_ERR(hub->vdd)) + return PTR_ERR(hub->vdd); + if (of_property_read_u16_array(np, "vendor-id", &hub->vendor_id, 1)) hub->vendor_id = USB251XB_DEF_VENDOR_ID; @@ -665,6 +671,10 @@ static int usb251xb_probe(struct usb251xb *hub) if (err) return err; + err = regulator_enable(hub->vdd); + if (err) + return err; + err = usb251xb_connect(hub); if (err) { dev_err(dev, "Failed to connect hub (%d)\n", err); -- cgit