From 58fa6ab42c29156b2808f8db231b2ffd8fa25502 Mon Sep 17 00:00:00 2001 From: Axel Lin Date: Wed, 17 Apr 2013 21:42:23 +0800 Subject: regulator: tps80031: Fix LDO2 track mode for TPS80031 or TPS80032-ES1.0 Currently we have a special code in tps80031_ldo_set_voltage_sel() to handle LDO2 track mode for TPS80031 or TPS80032-ES1.0. The purpose is to address below issues: Issue description: - LDO2 traking mode is enabled - LDO2 tracks SMPS2 voltage. - LDO2 automatically switch-off when LDO2_CFG_VOLTAGE is changed to some discrete values (non exhaustive list): 00011001, 00011010, 00011011, 00011100, . - LDO2 switch-on again when LDO2_CFG_VOLTAGE is changed to other values (non exhaustive list): 00011000, 00010111, . LDOs have reserved codes. For these codes, LDO is switch-off. In tracking, LDO2 ref comes from SMPS2. However LDO2 enable is still gated by LDO2 VSEL decoding. As a result, in tracking mode LDO2 will be disabled for following code (SMPS VSEL format): 000000 & 100000 (MSB not decoded) 011001 & 111001 (MSB not decoded) 011010 & 111010 (MSB not decoded) 011100 & 111100 (MSB not decoded) 011101 & 111101 (MSB not decoded) 011110 & 111110 (MSB not decoded) However, current code has below bugs: 1. It uses regulator_list_voltage_linear, so list_voltage() still shows above invalid selectors have supported voltage. 2. Current code may return -EINVAL in tps80031_ldo_set_voltage_sel() for supported voltage. This is because when we use regulator_list_voltage_linear as list_voltage callback, regulator core will default use regulator_map_voltage_linear(). regulator_map_voltage_linear() has an assumption that the voltages are linear which is not true for this case. For example, when request voltage range is: min_uV=950000 uV && max_uV=1200000 uV regulator_map_voltage_linear() returns the selector is 29 (0x1D), set_voltage_sel() returns -EINVAL. (The selector is in invalid range, 0x19 ~ 0x1f). In above case, map_voltage() should find the lowest valid voltage within specific range (selector = 0x20) and set_voltage_sel() should successfully set the voltage to 987500 uV. This patch fixes these issues by: 1. Add checking valid setting for LDO2 track mode of TPS80031 or TPS80032-ES1.0 in list_voltage. So it returns -EINVAL for invalid selectors. 2. Implement tps80031_ldo_map_voltage, use regulator_map_voltage_iterate() to find the lowest voltage within specific range for TPS80031 or TPS80032-ES1.0. This is required when the voltage map is no longer linear. Signed-off-by: Axel Lin Signed-off-by: Mark Brown --- drivers/regulator/tps80031-regulator.c | 38 ++++++++++++++++++++++++++++++---- 1 file changed, 34 insertions(+), 4 deletions(-) (limited to 'drivers/regulator') diff --git a/drivers/regulator/tps80031-regulator.c b/drivers/regulator/tps80031-regulator.c index 9019d0e7ecb6..6430789b8347 100644 --- a/drivers/regulator/tps80031-regulator.c +++ b/drivers/regulator/tps80031-regulator.c @@ -238,12 +238,11 @@ static int tps80031_dcdc_get_voltage_sel(struct regulator_dev *rdev) return vsel & SMPS_VSEL_MASK; } -static int tps80031_ldo_set_voltage_sel(struct regulator_dev *rdev, - unsigned sel) +static int tps80031_ldo_list_voltage(struct regulator_dev *rdev, + unsigned int sel) { struct tps80031_regulator *ri = rdev_get_drvdata(rdev); struct device *parent = to_tps80031_dev(rdev); - int ret; /* Check for valid setting for TPS80031 or TPS80032-ES1.0 */ if ((ri->rinfo->desc.id == TPS80031_REGULATOR_LDO2) && @@ -260,6 +259,36 @@ static int tps80031_ldo_set_voltage_sel(struct regulator_dev *rdev, } } + return regulator_list_voltage_linear(rdev, sel); +} + +static int tps80031_ldo_map_voltage(struct regulator_dev *rdev, + int min_uV, int max_uV) +{ + struct tps80031_regulator *ri = rdev_get_drvdata(rdev); + struct device *parent = to_tps80031_dev(rdev); + + /* Check for valid setting for TPS80031 or TPS80032-ES1.0 */ + if ((ri->rinfo->desc.id == TPS80031_REGULATOR_LDO2) && + (ri->device_flags & TRACK_MODE_ENABLE)) { + if (((tps80031_get_chip_info(parent) == TPS80031) || + ((tps80031_get_chip_info(parent) == TPS80032) && + (tps80031_get_pmu_version(parent) == 0x0)))) { + return regulator_map_voltage_iterate(rdev, min_uV, + max_uV); + } + } + + return regulator_map_voltage_linear(rdev, min_uV, max_uV); +} + +static int tps80031_ldo_set_voltage_sel(struct regulator_dev *rdev, + unsigned sel) +{ + struct tps80031_regulator *ri = rdev_get_drvdata(rdev); + struct device *parent = to_tps80031_dev(rdev); + int ret; + ret = tps80031_write(parent, ri->rinfo->volt_id, ri->rinfo->volt_reg, sel); if (ret < 0) @@ -390,7 +419,8 @@ static struct regulator_ops tps80031_dcdc_ops = { }; static struct regulator_ops tps80031_ldo_ops = { - .list_voltage = regulator_list_voltage_linear, + .list_voltage = tps80031_ldo_list_voltage, + .map_voltage = tps80031_ldo_map_voltage, .set_voltage_sel = tps80031_ldo_set_voltage_sel, .get_voltage_sel = tps80031_ldo_get_voltage_sel, .enable = tps80031_reg_enable, -- cgit v1.2.1 From bc49c87ec7a7695f30db73a7d73efd3566db4404 Mon Sep 17 00:00:00 2001 From: Axel Lin Date: Wed, 17 Apr 2013 21:43:39 +0800 Subject: regulator: tps80031: Convert tps80031_dcdc_ops to [get|set]_voltage_sel_regmap Signed-off-by: Axel Lin Signed-off-by: Mark Brown --- drivers/regulator/tps80031-regulator.c | 39 ++++++---------------------------- 1 file changed, 6 insertions(+), 33 deletions(-) (limited to 'drivers/regulator') diff --git a/drivers/regulator/tps80031-regulator.c b/drivers/regulator/tps80031-regulator.c index 6430789b8347..6511d0bfd896 100644 --- a/drivers/regulator/tps80031-regulator.c +++ b/drivers/regulator/tps80031-regulator.c @@ -282,37 +282,6 @@ static int tps80031_ldo_map_voltage(struct regulator_dev *rdev, return regulator_map_voltage_linear(rdev, min_uV, max_uV); } -static int tps80031_ldo_set_voltage_sel(struct regulator_dev *rdev, - unsigned sel) -{ - struct tps80031_regulator *ri = rdev_get_drvdata(rdev); - struct device *parent = to_tps80031_dev(rdev); - int ret; - - ret = tps80031_write(parent, ri->rinfo->volt_id, - ri->rinfo->volt_reg, sel); - if (ret < 0) - dev_err(ri->dev, "Error in writing reg 0x%02x, e = %d\n", - ri->rinfo->volt_reg, ret); - return ret; -} - -static int tps80031_ldo_get_voltage_sel(struct regulator_dev *rdev) -{ - struct tps80031_regulator *ri = rdev_get_drvdata(rdev); - struct device *parent = to_tps80031_dev(rdev); - uint8_t vsel; - int ret; - - ret = tps80031_read(parent, ri->rinfo->volt_id, - ri->rinfo->volt_reg, &vsel); - if (ret < 0) { - dev_err(ri->dev, "Error in writing the Voltage register\n"); - return ret; - } - return vsel & rdev->desc->vsel_mask; -} - static int tps80031_vbus_is_enabled(struct regulator_dev *rdev) { struct tps80031_regulator *ri = rdev_get_drvdata(rdev); @@ -421,8 +390,8 @@ static struct regulator_ops tps80031_dcdc_ops = { static struct regulator_ops tps80031_ldo_ops = { .list_voltage = tps80031_ldo_list_voltage, .map_voltage = tps80031_ldo_map_voltage, - .set_voltage_sel = tps80031_ldo_set_voltage_sel, - .get_voltage_sel = tps80031_ldo_get_voltage_sel, + .set_voltage_sel = regulator_set_voltage_sel_regmap, + .get_voltage_sel = regulator_get_voltage_sel_regmap, .enable = tps80031_reg_enable, .disable = tps80031_reg_disable, .is_enabled = tps80031_reg_is_enabled, @@ -489,6 +458,7 @@ static struct regulator_ops tps80031_ext_reg_ops = { .uV_step = 100000, \ .linear_min_sel = 1, \ .n_voltages = 25, \ + .vsel_reg = TPS80031_##_id##_CFG_VOLTAGE, \ .vsel_mask = LDO_VSEL_MASK, \ .enable_time = 500, \ }, \ @@ -710,6 +680,7 @@ static int tps80031_regulator_probe(struct platform_device *pdev) struct tps80031_regulator *pmic; struct regulator_dev *rdev; struct regulator_config config = { }; + struct tps80031 *tps80031_mfd = dev_get_drvdata(pdev->dev.parent); int ret; int num; @@ -737,6 +708,8 @@ static int tps80031_regulator_probe(struct platform_device *pdev) config.dev = &pdev->dev; config.init_data = NULL; config.driver_data = ri; + config.regmap = tps80031_mfd->regmap[ri->rinfo->volt_id]; + if (tps_pdata) { config.init_data = tps_pdata->reg_init_data; ri->config_flags = tps_pdata->config_flags; -- cgit v1.2.1