From: Tommaso Merciai <tomm.merciai@xxxxxxxxx> [ Upstream commit 5c2b9c61ae5d8ad0a196d33b66ce44543be22281 ] Add support for boost-up register of usb251xb hub. boost-up property control USB electrical drive strength This register can be set: - Normal mode -> 0x00 - Low -> 0x01 - Medium -> 0x10 - High -> 0x11 (Normal Default) References: - http://www.mouser.com/catalog/specsheets/2514.pdf p29 Reviewed-by: Richard Leitner <richard.leitner@xxxxxxxxx> Signed-off-by: Tommaso Merciai <tomm.merciai@xxxxxxxxx> Link: https://lore.kernel.org/r/20220128181713.96856-1-tomm.merciai@xxxxxxxxx Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- drivers/usb/misc/usb251xb.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/usb/misc/usb251xb.c b/drivers/usb/misc/usb251xb.c index 5f7734c729b1d..8444b92f9737f 100644 --- a/drivers/usb/misc/usb251xb.c +++ b/drivers/usb/misc/usb251xb.c @@ -510,6 +510,9 @@ static int usb251xb_get_ofdata(struct usb251xb *hub, if (of_property_read_u16_array(np, "language-id", &hub->lang_id, 1)) hub->lang_id = USB251XB_DEF_LANGUAGE_ID; + if (of_property_read_u8(np, "boost-up", &hub->boost_up)) + hub->boost_up = USB251XB_DEF_BOOST_UP; + cproperty_char = of_get_property(np, "manufacturer", NULL); strlcpy(str, cproperty_char ? : USB251XB_DEF_MANUFACTURER_STRING, sizeof(str)); @@ -543,7 +546,6 @@ static int usb251xb_get_ofdata(struct usb251xb *hub, * may be as soon as needed. */ hub->bat_charge_en = USB251XB_DEF_BATTERY_CHARGING_ENABLE; - hub->boost_up = USB251XB_DEF_BOOST_UP; hub->boost_57 = USB251XB_DEF_BOOST_57; hub->boost_14 = USB251XB_DEF_BOOST_14; hub->port_swap = USB251XB_DEF_PORT_SWAP; -- 2.34.1
