[PATCH AUTOSEL 5.16 06/34] usb: usb251xb: add boost-up property support

From: Sasha Levin
Date: Tue Feb 15 2022 - 10:27:21 EST


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 507deef1f7093..04c4e3fed0946 100644
--- a/drivers/usb/misc/usb251xb.c
+++ b/drivers/usb/misc/usb251xb.c
@@ -543,6 +543,9 @@ 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));
@@ -584,7 +587,6 @@ 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_map12 = USB251XB_DEF_PORT_MAP_12;
--
2.34.1