diff options
| author | NeilBrown <neilb@suse.de> | 2012-05-09 07:40:40 +1000 |
|---|---|---|
| committer | Anton Vorontsov <cbouatmailru@gmail.com> | 2012-06-19 19:13:27 -0700 |
| commit | ab37813f4093a5f59cb8e083cde277289dc72ed3 (patch) | |
| tree | 2b91baca976e3d1d2c92a8eb3ede3a8a693b71e8 /drivers/power | |
| parent | 210d4bc8a3128e3e61ac3bf4657114f8e6450e2a (diff) | |
twl4030_charger: Allow charger to control the regulator that feeds it
The charger needs usb3v1 to be running, so add a new consumer to
keep it running.
This allows the charger to draw current even when the USB driver has
powered down.
Signed-off-by: NeilBrown <neilb@suse.de>
Acked-by: Tero Kristo <t-kristo@ti.com>
Acked-by: Samuel Ortiz <sameo@linux.intel.com>
Signed-off-by: Anton Vorontsov <cbouatmailru@gmail.com>
Diffstat (limited to 'drivers/power')
| -rw-r--r-- | drivers/power/twl4030_charger.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/power/twl4030_charger.c b/drivers/power/twl4030_charger.c index 0511610b235f..bbda08377a42 100644 --- a/drivers/power/twl4030_charger.c +++ b/drivers/power/twl4030_charger.c @@ -21,6 +21,7 @@ #include <linux/power_supply.h> #include <linux/notifier.h> #include <linux/usb/otg.h> +#include <linux/regulator/machine.h> #define TWL4030_BCIMSTATEC 0x02 #define TWL4030_BCIICHG 0x08 @@ -86,6 +87,8 @@ struct twl4030_bci { struct work_struct work; int irq_chg; int irq_bci; + struct regulator *usb_reg; + int usb_enabled; unsigned long event; }; @@ -183,6 +186,12 @@ static int twl4030_charger_enable_usb(struct twl4030_bci *bci, bool enable) return -EACCES; } + /* Need to keep regulator on */ + if (!bci->usb_enabled) { + regulator_enable(bci->usb_reg); + bci->usb_enabled = 1; + } + /* forcing the field BCIAUTOUSB (BOOT_BCI[1]) to 1 */ ret = twl4030_clear_set_boot_bci(0, TWL4030_BCIAUTOUSB); if (ret < 0) @@ -193,6 +202,10 @@ static int twl4030_charger_enable_usb(struct twl4030_bci *bci, bool enable) TWL4030_USBFASTMCHG, TWL4030_BCIMFSTS4); } else { ret = twl4030_clear_set_boot_bci(TWL4030_BCIAUTOUSB, 0); + if (bci->usb_enabled) { + regulator_disable(bci->usb_reg); + bci->usb_enabled = 0; + } } return ret; @@ -511,6 +524,8 @@ static int __init twl4030_bci_probe(struct platform_device *pdev) bci->usb.num_properties = ARRAY_SIZE(twl4030_charger_props); bci->usb.get_property = twl4030_bci_get_property; + bci->usb_reg = regulator_get(bci->dev, "bci3v1"); + ret = power_supply_register(&pdev->dev, &bci->usb); if (ret) { dev_err(&pdev->dev, "failed to register usb: %d\n", ret); |