diff options
| author | Laxman Dewangan <ldewangan@nvidia.com> | 2012-09-28 19:44:57 +0530 |
|---|---|---|
| committer | Simone Willett <swillett@nvidia.com> | 2012-10-23 15:33:16 -0700 |
| commit | 8b539b9f68be12e432e986219715fa99fe2f3272 (patch) | |
| tree | 9dfb974e0153de623674c93dfbd959486ecdd6e4 /drivers/regulator | |
| parent | e38ced6e3522c1cdc5458d6bf1a29f4e82b3d10e (diff) | |
regulator: palmas: add option to disable tracking in suspend
Add option to disable tracking mode of LDO8 in suspend.
Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Reviewed-on: http://git-master/r/139735
(cherry picked from commit 7d82d5f408569fc17cca2abe9870461efe68d5fd)
Change-Id: I60d6142900dd4ce9190b138d6678f8a23d4d280a
Signed-off-by: Pradeep Goudagunta <pgoudagunta@nvidia.com>
Reviewed-on: http://git-master/r/146386
Reviewed-by: Simone Willett <swillett@nvidia.com>
Tested-by: Simone Willett <swillett@nvidia.com>
Diffstat (limited to 'drivers/regulator')
| -rw-r--r-- | drivers/regulator/palmas-regulator.c | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/drivers/regulator/palmas-regulator.c b/drivers/regulator/palmas-regulator.c index 1e1b20483614..8f49cb0d7473 100644 --- a/drivers/regulator/palmas-regulator.c +++ b/drivers/regulator/palmas-regulator.c @@ -958,6 +958,46 @@ static void palmas_enable_ldo8_track(struct palmas *palmas) return; } +static void palmas_disable_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); @@ -1164,10 +1204,41 @@ static int __devexit palmas_remove(struct platform_device *pdev) return 0; } +#ifdef CONFIG_PM_SLEEP +static int palmas_suspend(struct device *dev) +{ + struct palmas *palmas = dev_get_drvdata(dev->parent); + struct palmas_pmic_platform_data *pdata = dev_get_platdata(dev); + + /* Check if LDO8 is in tracking mode disable in suspend or not */ + if (pdata->enable_ldo8_tracking && pdata->disabe_ldo8_tracking_suspend) + palmas_disable_ldo8_track(palmas); + + return 0; +} + +static int palmas_resume(struct device *dev) +{ + struct palmas *palmas = dev_get_drvdata(dev->parent); + struct palmas_pmic_platform_data *pdata = dev_get_platdata(dev); + + /* Check if LDO8 is in tracking mode disable in suspend or not */ + if (pdata->enable_ldo8_tracking && pdata->disabe_ldo8_tracking_suspend) + palmas_enable_ldo8_track(palmas); + + return 0; +} +#endif +static const struct dev_pm_ops palmas_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(palmas_suspend, palmas_resume) +}; + + static struct platform_driver palmas_driver = { .driver = { .name = "palmas-pmic", .owner = THIS_MODULE, + .pm = &palmas_pm_ops, }, .probe = palmas_probe, .remove = __devexit_p(palmas_remove), |