diff options
Diffstat (limited to 'drivers/power')
| -rw-r--r-- | drivers/power/twl4030_charger.c | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/drivers/power/twl4030_charger.c b/drivers/power/twl4030_charger.c index 3e6e9910110..0511610b235 100644 --- a/drivers/power/twl4030_charger.c +++ b/drivers/power/twl4030_charger.c @@ -28,6 +28,7 @@ #define TWL4030_BCIVBUS 0x0c #define TWL4030_BCIMFSTS4 0x10 #define TWL4030_BCICTL1 0x23 +#define TWL4030_BB_CFG 0x12 #define TWL4030_BCIAUTOWEN BIT(5) #define TWL4030_CONFIG_DONE BIT(4) @@ -37,6 +38,17 @@ #define TWL4030_USBFASTMCHG BIT(2) #define TWL4030_STS_VBUS BIT(7) #define TWL4030_STS_USB_ID BIT(2) +#define TWL4030_BBCHEN BIT(4) +#define TWL4030_BBSEL_MASK 0b1100 +#define TWL4030_BBSEL_2V5 0b0000 +#define TWL4030_BBSEL_3V0 0b0100 +#define TWL4030_BBSEL_3V1 0b1000 +#define TWL4030_BBSEL_3V2 0b1100 +#define TWL4030_BBISEL_MASK 0b11 +#define TWL4030_BBISEL_25uA 0b00 +#define TWL4030_BBISEL_150uA 0b01 +#define TWL4030_BBISEL_500uA 0b10 +#define TWL4030_BBISEL_1000uA 0b11 /* BCI interrupts */ #define TWL4030_WOVF BIT(0) /* Watchdog overflow */ @@ -202,6 +214,49 @@ static int twl4030_charger_enable_ac(bool enable) } /* + * Enable/Disable charging of Backup Battery. + */ +static int twl4030_charger_enable_backup(int uvolt, int uamp) +{ + int ret; + u8 flags; + + if (uvolt < 2500000 || + uamp < 25) { + /* disable charging of backup battery */ + ret = twl4030_clear_set(TWL4030_MODULE_PM_RECEIVER, + TWL4030_BBCHEN, 0, TWL4030_BB_CFG); + return ret; + } + + flags = TWL4030_BBCHEN; + if (uvolt >= 3200000) + flags |= TWL4030_BBSEL_3V2; + else if (uvolt >= 3100000) + flags |= TWL4030_BBSEL_3V1; + else if (uvolt >= 3000000) + flags |= TWL4030_BBSEL_3V0; + else + flags |= TWL4030_BBSEL_2V5; + + if (uamp >= 1000) + flags |= TWL4030_BBISEL_1000uA; + else if (uamp >= 500) + flags |= TWL4030_BBISEL_500uA; + else if (uamp >= 150) + flags |= TWL4030_BBISEL_150uA; + else + flags |= TWL4030_BBISEL_25uA; + + ret = twl4030_clear_set(TWL4030_MODULE_PM_RECEIVER, + TWL4030_BBSEL_MASK | TWL4030_BBISEL_MASK, + flags, + TWL4030_BB_CFG); + + return ret; +} + +/* * TWL4030 CHG_PRES (AC charger presence) events */ static irqreturn_t twl4030_charger_interrupt(int irq, void *arg) @@ -424,6 +479,7 @@ static enum power_supply_property twl4030_charger_props[] = { static int __init twl4030_bci_probe(struct platform_device *pdev) { struct twl4030_bci *bci; + struct twl4030_bci_platform_data *pdata = pdev->dev.platform_data; int ret; u32 reg; @@ -503,6 +559,8 @@ static int __init twl4030_bci_probe(struct platform_device *pdev) twl4030_charger_enable_ac(true); twl4030_charger_enable_usb(bci, true); + twl4030_charger_enable_backup(pdata->bb_uvolt, + pdata->bb_uamp); return 0; @@ -531,6 +589,7 @@ static int __exit twl4030_bci_remove(struct platform_device *pdev) twl4030_charger_enable_ac(false); twl4030_charger_enable_usb(bci, false); + twl4030_charger_enable_backup(0, 0); /* mask interrupts */ twl_i2c_write_u8(TWL4030_MODULE_INTERRUPTS, 0xff, |