diff options
Diffstat (limited to 'drivers/extcon/extcon-intel-cht-wc.c')
| -rw-r--r-- | drivers/extcon/extcon-intel-cht-wc.c | 34 |
1 files changed, 33 insertions, 1 deletions
diff --git a/drivers/extcon/extcon-intel-cht-wc.c b/drivers/extcon/extcon-intel-cht-wc.c index 8d20e913536f..53b28ecc4ad1 100644 --- a/drivers/extcon/extcon-intel-cht-wc.c +++ b/drivers/extcon/extcon-intel-cht-wc.c @@ -56,6 +56,13 @@ #define CHT_WC_USBSRC_TYPE_OTHER 8 #define CHT_WC_USBSRC_TYPE_DCP_EXTPHY 9 +#define CHT_WC_CHGDISCTRL 0x5e2f +#define CHT_WC_CHGDISCTRL_OUT BIT(0) +/* 0 - open drain, 1 - regular push-pull output */ +#define CHT_WC_CHGDISCTRL_DRV BIT(4) +/* 0 - pin is controlled by SW, 1 - by HW */ +#define CHT_WC_CHGDISCTRL_FN BIT(6) + #define CHT_WC_PWRSRC_IRQ 0x6e03 #define CHT_WC_PWRSRC_IRQ_MASK 0x6e0f #define CHT_WC_PWRSRC_STS 0x6e1e @@ -218,6 +225,18 @@ static void cht_wc_extcon_set_otgmode(struct cht_wc_extcon_data *ext, dev_err(ext->dev, "Error updating CHGRCTRL1 reg: %d\n", ret); } +static void cht_wc_extcon_enable_charging(struct cht_wc_extcon_data *ext, + bool enable) +{ + unsigned int val = enable ? 0 : CHT_WC_CHGDISCTRL_OUT; + int ret; + + ret = regmap_update_bits(ext->regmap, CHT_WC_CHGDISCTRL, + CHT_WC_CHGDISCTRL_OUT, val); + if (ret) + dev_err(ext->dev, "Error updating CHGDISCTRL 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) @@ -242,6 +261,7 @@ 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_enable_charging(ext, false); cht_wc_extcon_set_otgmode(ext, true); /* The 5v boost causes a false VBUS / SDP detect, skip */ @@ -249,6 +269,7 @@ static void cht_wc_extcon_pwrsrc_event(struct cht_wc_extcon_data *ext) } cht_wc_extcon_set_otgmode(ext, false); + cht_wc_extcon_enable_charging(ext, true); /* Plugged into a host/charger or not connected? */ if (!(pwrsrc_sts & CHT_WC_PWRSRC_VBUS)) { @@ -302,6 +323,14 @@ static int cht_wc_extcon_sw_control(struct cht_wc_extcon_data *ext, bool enable) { int ret, mask, val; + val = enable ? 0 : CHT_WC_CHGDISCTRL_FN; + ret = regmap_update_bits(ext->regmap, CHT_WC_CHGDISCTRL, + CHT_WC_CHGDISCTRL_FN, val); + if (ret) + dev_err(ext->dev, + "Error setting sw control for CHGDIS pin: %d\n", + ret); + mask = CHT_WC_CHGRCTRL0_SWCONTROL | CHT_WC_CHGRCTRL0_CCSM_OFF; val = enable ? mask : 0; ret = regmap_update_bits(ext->regmap, CHT_WC_CHGRCTRL0, mask, val); @@ -353,7 +382,10 @@ static int cht_wc_extcon_probe(struct platform_device *pdev) /* Enable sw control */ ret = cht_wc_extcon_sw_control(ext, true); if (ret) - return ret; + goto disable_sw_control; + + /* Disable charging by external battery charger */ + cht_wc_extcon_enable_charging(ext, false); /* Register extcon device */ ret = devm_extcon_dev_register(ext->dev, ext->edev); |