lkml.org 
[lkml]   [2018]   [Apr]   [22]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 4.16 082/196] extcon: intel-cht-wc: Set direction and drv flags for V5 boost GPIO
Date
4.16-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Hans de Goede <hdegoede@redhat.com>

commit ad49aee401dd1997ec71360df6e51a91ad3cf516 upstream.

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.

Fixes: 585cb239f4de ("extcon: intel-cht-wc: Disable external 5v boost ...")
Cc: stable@vger.kernel.org
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
drivers/extcon/extcon-intel-cht-wc.c | 11 +++++++----
1 file changed, 7 insertions(+), 4 deletions(-)

--- 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(s
{
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);
}

\
 
 \ /
  Last update: 2018-04-22 15:58    [W:0.845 / U:0.144 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site