diff options
| author | Pradeep Goudagunta <pgoudagunta@nvidia.com> | 2012-11-07 13:46:11 +0530 |
|---|---|---|
| committer | Simone Willett <swillett@nvidia.com> | 2012-11-09 14:36:10 -0800 |
| commit | 91caa57f63bc62554e4efdd1e919283f27da094d (patch) | |
| tree | 66a59c3d3f6a14b10a316bf678eefa7056bd06be /drivers/regulator | |
| parent | 74896910027cbc5b09d01d6e5c2c5ba46efe0cc2 (diff) | |
mfd: palmas: pwm based cl dvfs support
SMPS12 and SMPS6 are capable of PWM based cl dvfs.
Bug 1058480
Change-Id: Ib000300ac508b471b9ebe698c603c93129f0675e
Signed-off-by: Pradeep Goudagunta <pgoudagunta@nvidia.com>
Reviewed-on: http://git-master/r/159832
Reviewed-by: Laxman Dewangan <ldewangan@nvidia.com>
Tested-by: Neil Patel <neilp@nvidia.com>
Diffstat (limited to 'drivers/regulator')
| -rw-r--r-- | drivers/regulator/palmas-regulator.c | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/drivers/regulator/palmas-regulator.c b/drivers/regulator/palmas-regulator.c index 9227dd5750d3..3fb5c11213a1 100644 --- a/drivers/regulator/palmas-regulator.c +++ b/drivers/regulator/palmas-regulator.c @@ -33,6 +33,7 @@ struct regs_info { u8 vsel_addr; u8 ctrl_addr; u8 tstep_addr; + u8 fvsel_addr; int sleep_id; }; @@ -42,6 +43,7 @@ static const struct regs_info palmas_regs_info[] = { .vsel_addr = PALMAS_SMPS12_VOLTAGE, .ctrl_addr = PALMAS_SMPS12_CTRL, .tstep_addr = PALMAS_SMPS12_TSTEP, + .fvsel_addr = PALMAS_SMPS12_FORCE, .sleep_id = PALMAS_SLEEP_REQSTR_ID_SMPS12, }, { @@ -76,6 +78,7 @@ static const struct regs_info palmas_regs_info[] = { .vsel_addr = PALMAS_SMPS6_VOLTAGE, .ctrl_addr = PALMAS_SMPS6_CTRL, .tstep_addr = PALMAS_SMPS6_TSTEP, + .fvsel_addr = PALMAS_SMPS6_FORCE, .sleep_id = PALMAS_SLEEP_REQSTR_ID_SMPS6, }, { @@ -1037,6 +1040,74 @@ static void palmas_disable_ldo8_track(struct palmas *palmas) return; } +static void palmas_dvfs_init(struct palmas *palmas, + struct palmas_pmic_platform_data *pdata) +{ + int slave; + struct palmas_dvfs_init_data *dvfs_idata = pdata->dvfs_init_data; + int data_size = pdata->dvfs_init_data_size; + unsigned int reg, addr; + int ret; + int sleep_id; + int i; + + if (!dvfs_idata || !data_size) + return; + + slave = PALMAS_BASE_TO_SLAVE(PALMAS_DVFS_BASE); + for (i = 0; i < data_size; i++) { + struct palmas_dvfs_init_data *dvfs_pd = &dvfs_idata[i]; + + sleep_id = palmas_regs_info[dvfs_pd->reg_id].sleep_id; + if (!dvfs_pd->en_pwm) + continue; + + ret = palmas_ext_power_req_config(palmas, sleep_id, + dvfs_pd->ext_ctrl, true); + if (ret < 0) { + dev_err(palmas->dev, + "Error in configuring external control\n"); + goto err; + } + + addr = PALMAS_BASE_TO_REG(PALMAS_DVFS_BASE, + (PALMAS_SMPS_DVFS1_CTRL) + i*3); + reg = (1 << PALMAS_SMPS_DVFS1_ENABLE_SHIFT); + if (dvfs_pd->step_20mV) + reg |= (1 << PALMAS_SMPS_DVFS1_OFFSET_STEP_SHIFT); + + ret = regmap_write(palmas->regmap[slave], addr, reg); + if (ret) + goto err; + + addr = PALMAS_BASE_TO_REG(PALMAS_DVFS_BASE, + (PALMAS_SMPS_DVFS1_VOLTAGE_MAX) + i*3); + if (!(dvfs_pd->max_voltage_uV >= DVFS_BASE_VOLTAGE_UV && + dvfs_pd->max_voltage_uV <= DVFS_MAX_VOLTAGE_UV)) + goto err; + + reg = DIV_ROUND_UP((dvfs_pd->max_voltage_uV - + DVFS_BASE_VOLTAGE_UV), DVFS_VOLTAGE_STEP_UV) + 6; + ret = regmap_write(palmas->regmap[slave], addr, reg); + if (ret) + goto err; + + addr = palmas_regs_info[dvfs_pd->reg_id].fvsel_addr; + reg = (1 << PALMAS_SMPS12_FORCE_CMD_SHIFT); + reg |= DIV_ROUND_UP((dvfs_pd->base_voltage_uV - + DVFS_BASE_VOLTAGE_UV), DVFS_VOLTAGE_STEP_UV) + 6; + ret = palmas_smps_write(palmas, addr, reg); + if (ret) + goto err; + + } + + return; +err: + dev_err(palmas->dev, "Failed to initilize cl dvfs(%d)", i); + return; +} + static __devinit int palmas_probe(struct platform_device *pdev) { struct palmas *palmas = dev_get_drvdata(pdev->dev.parent); @@ -1218,6 +1289,7 @@ static __devinit int palmas_probe(struct platform_device *pdev) if (pdata->enable_ldo8_tracking) palmas_enable_ldo8_track(palmas); + palmas_dvfs_init(palmas, pdata); return 0; err_unregister_regulator: |