diff options
| -rw-r--r-- | drivers/regulator/qcom_spmi-regulator.c | 189 |
1 files changed, 113 insertions, 76 deletions
diff --git a/drivers/regulator/qcom_spmi-regulator.c b/drivers/regulator/qcom_spmi-regulator.c index fdea94c..f502f2c 100644 --- a/drivers/regulator/qcom_spmi-regulator.c +++ b/drivers/regulator/qcom_spmi-regulator.c @@ -255,13 +255,6 @@ enum spmi_common_control_register_index { #define SPMI_FTSMPS_STEP_MARGIN_NUM 4 #define SPMI_FTSMPS_STEP_MARGIN_DEN 5 -/* - * This voltage in uV is returned by get_voltage functions when there is no way - * to determine the current voltage level. It is needed because the regulator - * framework treats a 0 uV voltage as an error. - */ -#define VOLTAGE_UNKNOWN 1 - /* VSET value to decide the range of ULT SMPS */ #define ULT_SMPS_RANGE_SPLIT 0x60 @@ -540,12 +533,12 @@ static int spmi_regulator_common_disable(struct regulator_dev *rdev) } static int spmi_regulator_select_voltage(struct spmi_regulator *vreg, - int min_uV, int max_uV, u8 *range_sel, u8 *voltage_sel, - unsigned *selector) + int min_uV, int max_uV) { const struct spmi_voltage_range *range; int uV = min_uV; int lim_min_uV, lim_max_uV, i, range_id, range_max_uV; + int selector, voltage_sel; /* Check if request voltage is outside of physically settable range. */ lim_min_uV = vreg->set_points->range[0].set_point_min_uV; @@ -571,14 +564,13 @@ static int spmi_regulator_select_voltage(struct spmi_regulator *vreg, range_id = i; range = &vreg->set_points->range[range_id]; - *range_sel = range->range_sel; /* * Force uV to be an allowed set point by applying a ceiling function to * the uV value. */ - *voltage_sel = DIV_ROUND_UP(uV - range->min_uV, range->step_uV); - uV = *voltage_sel * range->step_uV + range->min_uV; + voltage_sel = DIV_ROUND_UP(uV - range->min_uV, range->step_uV); + uV = voltage_sel * range->step_uV + range->min_uV; if (uV > max_uV) { dev_err(vreg->dev, @@ -588,12 +580,48 @@ static int spmi_regulator_select_voltage(struct spmi_regulator *vreg, return -EINVAL; } - *selector = 0; + selector = 0; for (i = 0; i < range_id; i++) - *selector += vreg->set_points->range[i].n_voltages; - *selector += (uV - range->set_point_min_uV) / range->step_uV; + selector += vreg->set_points->range[i].n_voltages; + selector += (uV - range->set_point_min_uV) / range->step_uV; - return 0; + return selector; +} + +static int spmi_sw_selector_to_hw(struct spmi_regulator *vreg, + unsigned selector, u8 *range_sel, + u8 *voltage_sel) +{ + const struct spmi_voltage_range *range, *end; + + range = vreg->set_points->range; + end = range + vreg->set_points->count; + + for (; range < end; range++) { + if (selector < range->n_voltages) { + *voltage_sel = selector; + *range_sel = range->range_sel; + return 0; + } + + selector -= range->n_voltages; + } + + return -EINVAL; +} + +static int spmi_hw_selector_to_sw(struct spmi_regulator *vreg, u8 hw_sel, + const struct spmi_voltage_range *range) +{ + int sw_sel = hw_sel; + const struct spmi_voltage_range *r = vreg->set_points->range; + + while (r != range) { + sw_sel += r->n_voltages; + r++; + } + + return sw_sel; } static const struct spmi_voltage_range * @@ -615,12 +643,11 @@ spmi_regulator_find_range(struct spmi_regulator *vreg) } static int spmi_regulator_select_voltage_same_range(struct spmi_regulator *vreg, - int min_uV, int max_uV, u8 *range_sel, u8 *voltage_sel, - unsigned *selector) + int min_uV, int max_uV) { const struct spmi_voltage_range *range; int uV = min_uV; - int i; + int i, selector; range = spmi_regulator_find_range(vreg); if (!range) @@ -638,8 +665,8 @@ static int spmi_regulator_select_voltage_same_range(struct spmi_regulator *vreg, * Force uV to be an allowed set point by applying a ceiling function to * the uV value. */ - *voltage_sel = DIV_ROUND_UP(uV - range->min_uV, range->step_uV); - uV = *voltage_sel * range->step_uV + range->min_uV; + uV = DIV_ROUND_UP(uV - range->min_uV, range->step_uV); + uV = uV * range->step_uV + range->min_uV; if (uV > max_uV) { /* @@ -649,43 +676,49 @@ static int spmi_regulator_select_voltage_same_range(struct spmi_regulator *vreg, goto different_range; } - *selector = 0; + selector = 0; for (i = 0; i < vreg->set_points->count; i++) { if (uV >= vreg->set_points->range[i].set_point_min_uV && uV <= vreg->set_points->range[i].set_point_max_uV) { - *selector += + selector += (uV - vreg->set_points->range[i].set_point_min_uV) / vreg->set_points->range[i].step_uV; break; } - *selector += vreg->set_points->range[i].n_voltages; + selector += vreg->set_points->range[i].n_voltages; } - if (*selector >= vreg->set_points->n_voltages) + if (selector >= vreg->set_points->n_voltages) goto different_range; return 0; different_range: - return spmi_regulator_select_voltage(vreg, min_uV, max_uV, - range_sel, voltage_sel, selector); + return spmi_regulator_select_voltage(vreg, min_uV, max_uV); } -static int spmi_regulator_common_set_voltage(struct regulator_dev *rdev, - int min_uV, int max_uV, unsigned *selector) +static int spmi_regulator_common_map_voltage(struct regulator_dev *rdev, + int min_uV, int max_uV) { struct spmi_regulator *vreg = rdev_get_drvdata(rdev); - int ret; - u8 buf[2]; - u8 range_sel, voltage_sel; /* * Favor staying in the current voltage range if possible. This avoids * voltage spikes that occur when changing the voltage range. */ - ret = spmi_regulator_select_voltage_same_range(vreg, min_uV, max_uV, - &range_sel, &voltage_sel, selector); + return spmi_regulator_select_voltage_same_range(vreg, min_uV, max_uV); +} + +static int +spmi_regulator_common_set_voltage(struct regulator_dev *rdev, unsigned selector) +{ + struct spmi_regulator *vreg = rdev_get_drvdata(rdev); + int ret; + u8 buf[2]; + u8 range_sel, voltage_sel; + + ret = spmi_sw_selector_to_hw(vreg, selector, &range_sel, &voltage_sel); if (ret) return ret; @@ -720,24 +753,24 @@ static int spmi_regulator_common_get_voltage(struct regulator_dev *rdev) range = spmi_regulator_find_range(vreg); if (!range) - return VOLTAGE_UNKNOWN; + return -EINVAL; - return range->step_uV * voltage_sel + range->min_uV; + return spmi_hw_selector_to_sw(vreg, voltage_sel, range); } -static int spmi_regulator_single_range_set_voltage(struct regulator_dev *rdev, - int min_uV, int max_uV, unsigned *selector) +static int spmi_regulator_single_map_voltage(struct regulator_dev *rdev, + int min_uV, int max_uV) { struct spmi_regulator *vreg = rdev_get_drvdata(rdev); - int ret; - u8 range_sel, sel; - ret = spmi_regulator_select_voltage(vreg, min_uV, max_uV, &range_sel, - &sel, selector); - if (ret) { - dev_err(vreg->dev, "could not set voltage, ret=%d\n", ret); - return ret; - } + return spmi_regulator_select_voltage(vreg, min_uV, max_uV); +} + +static int spmi_regulator_single_range_set_voltage(struct regulator_dev *rdev, + unsigned selector) +{ + struct spmi_regulator *vreg = rdev_get_drvdata(rdev); + u8 sel = selector; /* * Certain types of regulators do not have a range select register so @@ -749,27 +782,24 @@ static int spmi_regulator_single_range_set_voltage(struct regulator_dev *rdev, static int spmi_regulator_single_range_get_voltage(struct regulator_dev *rdev) { struct spmi_regulator *vreg = rdev_get_drvdata(rdev); - const struct spmi_voltage_range *range = vreg->set_points->range; - u8 voltage_sel; + u8 selector; + int ret; - spmi_vreg_read(vreg, SPMI_COMMON_REG_VOLTAGE_SET, &voltage_sel, 1); + ret = spmi_vreg_read(vreg, SPMI_COMMON_REG_VOLTAGE_SET, &selector, 1); + if (ret) + return ret; - return range->step_uV * voltage_sel + range->min_uV; + return selector; } static int spmi_regulator_ult_lo_smps_set_voltage(struct regulator_dev *rdev, - int min_uV, int max_uV, unsigned *selector) + unsigned selector) { struct spmi_regulator *vreg = rdev_get_drvdata(rdev); int ret; u8 range_sel, voltage_sel; - /* - * Favor staying in the current voltage range if possible. This avoids - * voltage spikes that occur when changing the voltage range. - */ - ret = spmi_regulator_select_voltage_same_range(vreg, min_uV, max_uV, - &range_sel, &voltage_sel, selector); + ret = spmi_sw_selector_to_hw(vreg, selector, &range_sel, &voltage_sel); if (ret) return ret; @@ -784,7 +814,7 @@ static int spmi_regulator_ult_lo_smps_set_voltage(struct regulator_dev *rdev, voltage_sel |= ULT_SMPS_RANGE_SPLIT; return spmi_vreg_update_bits(vreg, SPMI_COMMON_REG_VOLTAGE_SET, - voltage_sel, 0xff); + voltage_sel, 0xff); } static int spmi_regulator_ult_lo_smps_get_voltage(struct regulator_dev *rdev) @@ -797,12 +827,12 @@ static int spmi_regulator_ult_lo_smps_get_voltage(struct regulator_dev *rdev) range = spmi_regulator_find_range(vreg); if (!range) - return VOLTAGE_UNKNOWN; + return -EINVAL; if (range->range_sel == 1) voltage_sel &= ~ULT_SMPS_RANGE_SPLIT; - return range->step_uV * voltage_sel + range->min_uV; + return spmi_hw_selector_to_sw(vreg, voltage_sel, range); } static int spmi_regulator_common_list_voltage(struct regulator_dev *rdev, @@ -1008,9 +1038,10 @@ static struct regulator_ops spmi_smps_ops = { .enable = spmi_regulator_common_enable, .disable = spmi_regulator_common_disable, .is_enabled = spmi_regulator_common_is_enabled, - .set_voltage = spmi_regulator_common_set_voltage, + .set_voltage_sel = spmi_regulator_common_set_voltage, .set_voltage_time_sel = spmi_regulator_set_voltage_time_sel, - .get_voltage = spmi_regulator_common_get_voltage, + .get_voltage_sel = spmi_regulator_common_get_voltage, + .map_voltage = spmi_regulator_common_map_voltage, .list_voltage = spmi_regulator_common_list_voltage, .set_mode = spmi_regulator_common_set_mode, .get_mode = spmi_regulator_common_get_mode, @@ -1022,8 +1053,9 @@ static struct regulator_ops spmi_ldo_ops = { .enable = spmi_regulator_common_enable, .disable = spmi_regulator_common_disable, .is_enabled = spmi_regulator_common_is_enabled, - .set_voltage = spmi_regulator_common_set_voltage, - .get_voltage = spmi_regulator_common_get_voltage, + .set_voltage_sel = spmi_regulator_common_set_voltage, + .get_voltage_sel = spmi_regulator_common_get_voltage, + .map_voltage = spmi_regulator_common_map_voltage, .list_voltage = spmi_regulator_common_list_voltage, .set_mode = spmi_regulator_common_set_mode, .get_mode = spmi_regulator_common_get_mode, @@ -1038,8 +1070,9 @@ static struct regulator_ops spmi_ln_ldo_ops = { .enable = spmi_regulator_common_enable, .disable = spmi_regulator_common_disable, .is_enabled = spmi_regulator_common_is_enabled, - .set_voltage = spmi_regulator_common_set_voltage, - .get_voltage = spmi_regulator_common_get_voltage, + .set_voltage_sel = spmi_regulator_common_set_voltage, + .get_voltage_sel = spmi_regulator_common_get_voltage, + .map_voltage = spmi_regulator_common_map_voltage, .list_voltage = spmi_regulator_common_list_voltage, .set_bypass = spmi_regulator_common_set_bypass, .get_bypass = spmi_regulator_common_get_bypass, @@ -1058,8 +1091,9 @@ static struct regulator_ops spmi_boost_ops = { .enable = spmi_regulator_common_enable, .disable = spmi_regulator_common_disable, .is_enabled = spmi_regulator_common_is_enabled, - .set_voltage = spmi_regulator_single_range_set_voltage, - .get_voltage = spmi_regulator_single_range_get_voltage, + .set_voltage_sel = spmi_regulator_single_range_set_voltage, + .get_voltage_sel = spmi_regulator_single_range_get_voltage, + .map_voltage = spmi_regulator_single_map_voltage, .list_voltage = spmi_regulator_common_list_voltage, .set_input_current_limit = spmi_regulator_set_ilim, }; @@ -1068,9 +1102,10 @@ static struct regulator_ops spmi_ftsmps_ops = { .enable = spmi_regulator_common_enable, .disable = spmi_regulator_common_disable, .is_enabled = spmi_regulator_common_is_enabled, - .set_voltage = spmi_regulator_common_set_voltage, + .set_voltage_sel = spmi_regulator_common_set_voltage, .set_voltage_time_sel = spmi_regulator_set_voltage_time_sel, - .get_voltage = spmi_regulator_common_get_voltage, + .get_voltage_sel = spmi_regulator_common_get_voltage, + .map_voltage = spmi_regulator_common_map_voltage, .list_voltage = spmi_regulator_common_list_voltage, .set_mode = spmi_regulator_common_set_mode, .get_mode = spmi_regulator_common_get_mode, @@ -1082,9 +1117,9 @@ static struct regulator_ops spmi_ult_lo_smps_ops = { .enable = spmi_regulator_common_enable, .disable = spmi_regulator_common_disable, .is_enabled = spmi_regulator_common_is_enabled, - .set_voltage = spmi_regulator_ult_lo_smps_set_voltage, + .set_voltage_sel = spmi_regulator_ult_lo_smps_set_voltage, .set_voltage_time_sel = spmi_regulator_set_voltage_time_sel, - .get_voltage = spmi_regulator_ult_lo_smps_get_voltage, + .get_voltage_sel = spmi_regulator_ult_lo_smps_get_voltage, .list_voltage = spmi_regulator_common_list_voltage, .set_mode = spmi_regulator_common_set_mode, .get_mode = spmi_regulator_common_get_mode, @@ -1096,9 +1131,10 @@ static struct regulator_ops spmi_ult_ho_smps_ops = { .enable = spmi_regulator_common_enable, .disable = spmi_regulator_common_disable, .is_enabled = spmi_regulator_common_is_enabled, - .set_voltage = spmi_regulator_single_range_set_voltage, + .set_voltage_sel = spmi_regulator_single_range_set_voltage, .set_voltage_time_sel = spmi_regulator_set_voltage_time_sel, - .get_voltage = spmi_regulator_single_range_get_voltage, + .get_voltage_sel = spmi_regulator_single_range_get_voltage, + .map_voltage = spmi_regulator_single_map_voltage, .list_voltage = spmi_regulator_common_list_voltage, .set_mode = spmi_regulator_common_set_mode, .get_mode = spmi_regulator_common_get_mode, @@ -1110,8 +1146,9 @@ static struct regulator_ops spmi_ult_ldo_ops = { .enable = spmi_regulator_common_enable, .disable = spmi_regulator_common_disable, .is_enabled = spmi_regulator_common_is_enabled, - .set_voltage = spmi_regulator_single_range_set_voltage, - .get_voltage = spmi_regulator_single_range_get_voltage, + .set_voltage_sel = spmi_regulator_single_range_set_voltage, + .get_voltage_sel = spmi_regulator_single_range_get_voltage, + .map_voltage = spmi_regulator_single_map_voltage, .list_voltage = spmi_regulator_common_list_voltage, .set_mode = spmi_regulator_common_set_mode, .get_mode = spmi_regulator_common_get_mode, |
