From: Tony Lindgren Date: Fri, 30 Aug 2019 23:23:16 +0000 (-0700) Subject: power: supply: cpcap-charger: Enable vbus boost voltage X-Git-Tag: v5.15~5445^2 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=7f7378618b4103c083db7de5017df958f8ada070;p=platform%2Fkernel%2Flinux-starfive.git power: supply: cpcap-charger: Enable vbus boost voltage We are currently not enabling VBUS boost for cpcap when in host mode. This means the VBUS is fed at the battery voltage level, which can cause flakeyness enumerating devices. Looks like the boost control for VBUS is CPCAP_BIT_VBUS_SWITCH that we must enable in the charger for nice 4.92 V VBUS output. And looks like we must not use the STBY pin enabling but must instead use manual VBUS control in phy-cpcap-usb. We want to do this in cpcap_charger_vbus_work() and also set a flag for feeding_vbus to avoid races between USB detection and charger detection, and disable charging if feeding_vbus is set. Cc: Jacopo Mondi Cc: Kishon Vijay Abraham I Cc: Marcel Partap Cc: Merlijn Wajer Cc: Michael Scott Cc: NeKit Cc: Pavel Machek Cc: Sebastian Reichel Signed-off-by: Tony Lindgren Signed-off-by: Sebastian Reichel --- diff --git a/drivers/phy/motorola/phy-cpcap-usb.c b/drivers/phy/motorola/phy-cpcap-usb.c index 6601ad0..ead06c6 100644 --- a/drivers/phy/motorola/phy-cpcap-usb.c +++ b/drivers/phy/motorola/phy-cpcap-usb.c @@ -231,8 +231,9 @@ static void cpcap_usb_detect(struct work_struct *work) goto out_err; error = regmap_update_bits(ddata->reg, CPCAP_REG_USBC3, - CPCAP_BIT_VBUSSTBY_EN, - CPCAP_BIT_VBUSSTBY_EN); + CPCAP_BIT_VBUSSTBY_EN | + CPCAP_BIT_VBUSEN_SPI, + CPCAP_BIT_VBUSEN_SPI); if (error) goto out_err; @@ -240,7 +241,8 @@ static void cpcap_usb_detect(struct work_struct *work) } error = regmap_update_bits(ddata->reg, CPCAP_REG_USBC3, - CPCAP_BIT_VBUSSTBY_EN, 0); + CPCAP_BIT_VBUSSTBY_EN | + CPCAP_BIT_VBUSEN_SPI, 0); if (error) goto out_err; diff --git a/drivers/power/supply/cpcap-charger.c b/drivers/power/supply/cpcap-charger.c index cc546bc..74258c7 100644 --- a/drivers/power/supply/cpcap-charger.c +++ b/drivers/power/supply/cpcap-charger.c @@ -108,6 +108,9 @@ #define CPCAP_REG_CRM_ICHRG_1A596 CPCAP_REG_CRM_ICHRG(0xe) #define CPCAP_REG_CRM_ICHRG_NO_LIMIT CPCAP_REG_CRM_ICHRG(0xf) +/* CPCAP_REG_VUSBC register bits needed for VBUS */ +#define CPCAP_BIT_VBUS_SWITCH BIT(0) /* VBUS boost to 5V */ + enum { CPCAP_CHARGER_IIO_BATTDET, CPCAP_CHARGER_IIO_VOLTAGE, @@ -130,7 +133,8 @@ struct cpcap_charger_ddata { struct power_supply *usb; struct phy_companion comparator; /* For USB VBUS */ - bool vbus_enabled; + unsigned int vbus_enabled:1; + unsigned int feeding_vbus:1; atomic_t active; int status; @@ -325,7 +329,6 @@ static bool cpcap_charger_vbus_valid(struct cpcap_charger_ddata *ddata) } /* VBUS control functions for the USB PHY companion */ - static void cpcap_charger_vbus_work(struct work_struct *work) { struct cpcap_charger_ddata *ddata; @@ -343,6 +346,7 @@ static void cpcap_charger_vbus_work(struct work_struct *work) return; } + ddata->feeding_vbus = true; cpcap_charger_set_cable_path(ddata, false); cpcap_charger_set_inductive_path(ddata, false); @@ -350,12 +354,23 @@ static void cpcap_charger_vbus_work(struct work_struct *work) if (error) goto out_err; + error = regmap_update_bits(ddata->reg, CPCAP_REG_VUSBC, + CPCAP_BIT_VBUS_SWITCH, + CPCAP_BIT_VBUS_SWITCH); + if (error) + goto out_err; + error = regmap_update_bits(ddata->reg, CPCAP_REG_CRM, CPCAP_REG_CRM_RVRSMODE, CPCAP_REG_CRM_RVRSMODE); if (error) goto out_err; } else { + error = regmap_update_bits(ddata->reg, CPCAP_REG_VUSBC, + CPCAP_BIT_VBUS_SWITCH, 0); + if (error) + goto out_err; + error = regmap_update_bits(ddata->reg, CPCAP_REG_CRM, CPCAP_REG_CRM_RVRSMODE, 0); if (error) @@ -363,6 +378,7 @@ static void cpcap_charger_vbus_work(struct work_struct *work) cpcap_charger_set_cable_path(ddata, true); cpcap_charger_set_inductive_path(ddata, true); + ddata->feeding_vbus = false; } return; @@ -431,7 +447,8 @@ static void cpcap_usb_detect(struct work_struct *work) if (error) return; - if (cpcap_charger_vbus_valid(ddata) && s.chrgcurr1) { + if (!ddata->feeding_vbus && cpcap_charger_vbus_valid(ddata) && + s.chrgcurr1) { int max_current; if (cpcap_charger_battery_found(ddata))