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

Signed-off-by: Tommaso Merciai <tomm.merciai@gmail.com>
---
Changes since v1:
 - Fix patch as suggested by RLeitner

Changes since v2:
 - Fix commit body as suggested by Shtylyov
 - Fix commit msg
 - Fix patch as suggested by RLeitner and Shtylyov

 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 507deef1f709..04c4e3fed094 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;
-- 
2.25.1

LGTM. Please feel free to add

Reviewed-by: Richard Leitner <richard.leitner@linux.dev>

On Fri, Jan 28, 2022 at 07:17:13PM +0100, Tommaso Merciai wrote:
> 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
> 
> Signed-off-by: Tommaso Merciai <tomm.merciai@gmail.com>
> ---
> Changes since v1:
>  - Fix patch as suggested by RLeitner
> 
> Changes since v2:
>  - Fix commit body as suggested by Shtylyov
>  - Fix commit msg
>  - Fix patch as suggested by RLeitner and Shtylyov
> 
>  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 507deef1f709..04c4e3fed094 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;
> -- 
> 2.25.1
>