Hi,
On 2018년 02월 15일 16:24, Hans de Goede wrote:
> Sometimes (firmware bug?) the V5 boost GPIO is not configured as output
> by the BIOS, leading to the 5V boost convertor being permanently on,
>
> Explicitly set the direction and drv flags rather then inheriting them
> from the firmware to fix this.
>
> Signed-off-by: Hans de Goede <hdego...@redhat.com>
You need to add fixes tag and send stable mailing list.
> ---
> drivers/extcon/extcon-intel-cht-wc.c | 11 +++++++----
> 1 file changed, 7 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/extcon/extcon-intel-cht-wc.c
> b/drivers/extcon/extcon-intel-cht-wc.c
> index 7c4bc8c44c3f..b7e9ea377d70 100644
> --- a/drivers/extcon/extcon-intel-cht-wc.c
> +++ b/drivers/extcon/extcon-intel-cht-wc.c
> @@ -66,6 +66,8 @@
>
> #define CHT_WC_VBUS_GPIO_CTLO 0x6e2d
> #define CHT_WC_VBUS_GPIO_CTLO_OUTPUT BIT(0)
> +#define CHT_WC_VBUS_GPIO_CTLO_DRV_OD BIT(4)
> +#define CHT_WC_VBUS_GPIO_CTLO_DIR_OUT BIT(5)
>
> enum cht_wc_usb_id {
> USB_ID_OTG,
> @@ -183,14 +185,15 @@ static void cht_wc_extcon_set_5v_boost(struct
> cht_wc_extcon_data *ext,
> {
> int ret, val;
>
> - val = enable ? CHT_WC_VBUS_GPIO_CTLO_OUTPUT : 0;
> -
> /*
> * The 5V boost converter is enabled through a gpio on the PMIC, since
> * there currently is no gpio driver we access the gpio reg directly.
> */
> - ret = regmap_update_bits(ext->regmap, CHT_WC_VBUS_GPIO_CTLO,
> - CHT_WC_VBUS_GPIO_CTLO_OUTPUT, val);
> + val = CHT_WC_VBUS_GPIO_CTLO_DRV_OD | CHT_WC_VBUS_GPIO_CTLO_DIR_OUT;
> + if (enable)
> + val |= CHT_WC_VBUS_GPIO_CTLO_OUTPUT;
> +
> + ret = regmap_write(ext->regmap, CHT_WC_VBUS_GPIO_CTLO, val);
> if (ret)
> dev_err(ext->dev, "Error writing Vbus GPIO CTLO: %d\n", ret);
> }
>
--
Best Regards,
Chanwoo Choi
Samsung Electronics
