diff options
| author | Laxman Dewangan <ldewangan@nvidia.com> | 2012-11-20 01:46:51 -0500 |
|---|---|---|
| committer | Dan Willemsen <dwillemsen@nvidia.com> | 2013-09-14 12:42:50 -0700 |
| commit | 9149f56e0e37f5c0392f751cf111e275c47ff7d6 (patch) | |
| tree | 3d71e566b33f6cbcb4a30a2536974f99f2e1d9d0 | |
| parent | 3a434f3c5a8373c703ef5a3f6d806aefe3989fb4 (diff) | |
rtc: palmas: add battery backup charging support
Add platform data for RTC to select the battery
backup charging or not.
Change-Id: Ie4010a9c58c89237619017297733320ca646960c
Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Reviewed-on: http://git-master/r/164937
Reviewed-by: Automatic_Commit_Validation_User
| -rw-r--r-- | drivers/rtc/rtc-palmas.c | 38 | ||||
| -rw-r--r-- | include/linux/mfd/palmas.h | 6 |
2 files changed, 44 insertions, 0 deletions
diff --git a/drivers/rtc/rtc-palmas.c b/drivers/rtc/rtc-palmas.c index 52952d41e82e..aed71f5a87e6 100644 --- a/drivers/rtc/rtc-palmas.c +++ b/drivers/rtc/rtc-palmas.c @@ -283,6 +283,8 @@ static int __devinit palmas_rtc_probe(struct platform_device *pdev) { struct palmas *palmas = NULL; struct palmas_rtc *palmas_rtc = NULL; + struct palmas_platform_data *palmas_pdata; + struct palmas_rtc_platform_data *rtc_pdata = NULL; int ret; u32 rtc_reg; @@ -295,7 +297,43 @@ static int __devinit palmas_rtc_probe(struct platform_device *pdev) return -ENOMEM; } + palmas_pdata = dev_get_platdata(pdev->dev.parent); + if (palmas_pdata) + rtc_pdata = palmas_pdata->rtc_pdata; + palmas->rtc = palmas_rtc; + if (rtc_pdata && rtc_pdata->enable_charging) { + int slave; + unsigned int addr; + int reg = 0; + + addr = PALMAS_BASE_TO_REG(PALMAS_PMU_CONTROL_BASE, + PALMAS_BACKUP_BATTERY_CTRL); + slave = PALMAS_BASE_TO_SLAVE(PALMAS_PMU_CONTROL_BASE); + + if (rtc_pdata->charging_current_ua < 100) + reg = PALMAS_BACKUP_BATTERY_CTRL_BBS_BBC_LOW_ICHRG; + + ret = regmap_update_bits(palmas->regmap[slave], addr, + PALMAS_BACKUP_BATTERY_CTRL_BBS_BBC_LOW_ICHRG, + reg); + if (ret < 0) { + dev_err(&pdev->dev, + "Battery backup control failed, e %d\n", ret); + return ret; + }; + + ret = regmap_update_bits(palmas->regmap[slave], addr, + PALMAS_BACKUP_BATTERY_CTRL_BB_CHG_EN, + PALMAS_BACKUP_BATTERY_CTRL_BB_CHG_EN); + if (ret < 0) { + dev_err(&pdev->dev, + "Battery backup charging enable failed, e %d\n", + ret); + return ret; + } + } + /* Clear pending interrupts */ ret = palmas_rtc_read(palmas, PALMAS_RTC_STATUS_REG, &rtc_reg); diff --git a/include/linux/mfd/palmas.h b/include/linux/mfd/palmas.h index 94929d400d64..2f93e253c237 100644 --- a/include/linux/mfd/palmas.h +++ b/include/linux/mfd/palmas.h @@ -258,6 +258,11 @@ struct palmas_clk_platform_data { int clk32kgaudio_mode_sleep; }; +struct palmas_rtc_platform_data { + unsigned enable_charging:1; + unsigned charging_current_ua; +}; + struct palmas_platform_data { int irq_flags; int gpio_base; @@ -278,6 +283,7 @@ struct palmas_platform_data { struct palmas_usb_platform_data *usb_pdata; struct palmas_resource_platform_data *resource_pdata; struct palmas_clk_platform_data *clk_pdata; + struct palmas_rtc_platform_data *rtc_pdata; struct palmas_clk32k_init_data *clk32k_init_data; int clk32k_init_data_size; |