diff options
| author | Laxman Dewangan <ldewangan@nvidia.com> | 2012-09-11 21:08:28 +0530 |
|---|---|---|
| committer | Simone Willett <swillett@nvidia.com> | 2012-09-12 10:20:45 -0700 |
| commit | 323dafcae1574e923f7baff5a86b2e7ed3dc647a (patch) | |
| tree | 0b4df20246db4a73a25fb0bafcf3de99f8cd6b9e /drivers/regulator | |
| parent | c2970639a7ec5e3b22126a6534ee25e9b586acc7 (diff) | |
regulator: palmas: support ldo8 tracking mode
LDO8 is having tracking mode where it can track
for SMPS45. Add support for configuring this mode.
Change-Id: I19195ff8b8c4ad1dab8d233f8380c481493b6829
Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Reviewed-on: http://git-master/r/131459
Tested-by: Mallikarjun Kasoju <mkasoju@nvidia.com>
Reviewed-by: Automatic_Commit_Validation_User
Diffstat (limited to 'drivers/regulator')
| -rw-r--r-- | drivers/regulator/palmas-regulator.c | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/drivers/regulator/palmas-regulator.c b/drivers/regulator/palmas-regulator.c index a405ab796606..27911c2a5e52 100644 --- a/drivers/regulator/palmas-regulator.c +++ b/drivers/regulator/palmas-regulator.c @@ -813,6 +813,46 @@ static int palmas_extreg_init(struct palmas *palmas, int id, return 0; } +static void palmas_enable_ldo8_track(struct palmas *palmas) +{ + unsigned int reg; + unsigned int addr; + int ret; + + addr = palmas_regs_info[PALMAS_REG_LDO8].ctrl_addr; + + ret = palmas_ldo_read(palmas, addr, ®); + if (ret) { + dev_err(palmas->dev, "Error in reading ldo8 control reg\n"); + return; + } + + reg |= PALMAS_LDO8_CTRL_LDO_TRACKING_EN; + ret = palmas_ldo_write(palmas, addr, reg); + if (ret < 0) { + dev_err(palmas->dev, "Error in enabling tracking mode\n"); + return; + } + /* + * When SMPS4&5 is set to off and LDO8 tracking is enabled, the LDO8 + * output is defined by the LDO8_VOLTAGE.VSEL register divided by two, + * and can be set from 0.45 to 1.65 V. + */ + addr = palmas_regs_info[PALMAS_REG_LDO8].vsel_addr; + ret = palmas_ldo_read(palmas, addr, ®); + if (ret) { + dev_err(palmas->dev, "Error in reading ldo8 voltage reg\n"); + return; + } + + reg = (reg << 1) & PALMAS_LDO8_VOLTAGE_VSEL_MASK; + ret = palmas_ldo_write(palmas, addr, reg); + if (ret < 0) + dev_err(palmas->dev, "Error in setting ldo8 voltage reg\n"); + + return; +} + static __devinit int palmas_probe(struct platform_device *pdev) { struct palmas *palmas = dev_get_drvdata(pdev->dev.parent); @@ -990,6 +1030,10 @@ static __devinit int palmas_probe(struct platform_device *pdev) } } + /* Check if LDO8 is in tracking mode or not */ + if (pdata->enable_ldo8_tracking) + palmas_enable_ldo8_track(palmas); + return 0; err_unregister_regulator: |