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extcon: intel-cht-wc: Make charger detection co-existed with OTG host mode

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Whiskey Cove Cherry Trail PMIC requires disabling OTG host mode before
of charger detection procedure. Do this by manipulationg of CHGRCTRL1
register.

Source: APCI DSDT code of Lenovo Yoga Book YB1-X91L and open-sourced
Intel's drivers.

Signed-off-by: Yauhen Kharuzhy <jekhor@gmail.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Tested-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
This commit is contained in:
Yauhen Kharuzhy 2019-03-03 23:16:12 +03:00 committed by Chanwoo Choi
parent 86baf800de
commit 3137301b6d
1 changed files with 25 additions and 1 deletions
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26
drivers/extcon/extcon-intel-cht-wc.c
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@ -29,7 +29,15 @@
#define CHT_WC_CHGRCTRL0_DBPOFF BIT(6)
#define CHT_WC_CHGRCTRL0_CHR_WDT_NOKICK BIT(7)
#define CHT_WC_CHGRCTRL1 0x5e17
#define CHT_WC_CHGRCTRL1 0x5e17
#define CHT_WC_CHGRCTRL1_FUSB_INLMT_100 BIT(0)
#define CHT_WC_CHGRCTRL1_FUSB_INLMT_150 BIT(1)
#define CHT_WC_CHGRCTRL1_FUSB_INLMT_500 BIT(2)
#define CHT_WC_CHGRCTRL1_FUSB_INLMT_900 BIT(3)
#define CHT_WC_CHGRCTRL1_FUSB_INLMT_1500 BIT(4)
#define CHT_WC_CHGRCTRL1_FTEMP_EVENT BIT(5)
#define CHT_WC_CHGRCTRL1_OTGMODE BIT(6)
#define CHT_WC_CHGRCTRL1_DBPEN BIT(7)
#define CHT_WC_USBSRC 0x5e29
#define CHT_WC_USBSRC_STS_MASK GENMASK(1, 0)
@ -198,6 +206,18 @@ static void cht_wc_extcon_set_5v_boost(struct cht_wc_extcon_data *ext,
dev_err(ext->dev, "Error writing Vbus GPIO CTLO: %d\n", ret);
}
static void cht_wc_extcon_set_otgmode(struct cht_wc_extcon_data *ext,
bool enable)
{
unsigned int val = enable ? CHT_WC_CHGRCTRL1_OTGMODE : 0;
int ret;
ret = regmap_update_bits(ext->regmap, CHT_WC_CHGRCTRL1,
CHT_WC_CHGRCTRL1_OTGMODE, val);
if (ret)
dev_err(ext->dev, "Error updating CHGRCTRL1 reg: %d\n", ret);
}
/* Small helper to sync EXTCON_CHG_USB_SDP and EXTCON_USB state */
static void cht_wc_extcon_set_state(struct cht_wc_extcon_data *ext,
unsigned int cable, bool state)
@ -222,10 +242,14 @@ static void cht_wc_extcon_pwrsrc_event(struct cht_wc_extcon_data *ext)
id = cht_wc_extcon_get_id(ext, pwrsrc_sts);
if (id == USB_ID_GND) {
cht_wc_extcon_set_otgmode(ext, true);
/* The 5v boost causes a false VBUS / SDP detect, skip */
goto charger_det_done;
}
cht_wc_extcon_set_otgmode(ext, false);
/* Plugged into a host/charger or not connected? */
if (!(pwrsrc_sts & CHT_WC_PWRSRC_VBUS)) {
/* Route D+ and D- to PMIC for future charger detection */