From bc3b7756b5ff66828acf7bc24f148d28b8d61108 Mon Sep 17 00:00:00 2001 From: Axel Lin Date: Fri, 28 Dec 2012 17:09:03 +0800 Subject: [PATCH] regulator: max8997: Use uV in voltage_map_desc Current code does integer division (min_vol = min_uV / 1000) before pass min_vol to max8997_get_voltage_proper_val(). So it is possible min_vol is truncated to a smaller value. For example, if the request min_uV is 800900 for ldo. min_vol = 800900 / 1000 = 800 (mV) Then max8997_get_voltage_proper_val returns 800 mV for this case which is lower than the requested voltage. Use uV rather than mV in voltage_map_desc to prevent truncation by integer division. Signed-off-by: Axel Lin Signed-off-by: Mark Brown Cc: stable@vger.kernel.org --- drivers/regulator/max8997.c | 36 +++++++++++++++++------------------- 1 file changed, 17 insertions(+), 19 deletions(-) diff --git a/drivers/regulator/max8997.c b/drivers/regulator/max8997.c index df0eafb0dc7e..02be7fcae32f 100644 --- a/drivers/regulator/max8997.c +++ b/drivers/regulator/max8997.c @@ -71,26 +71,26 @@ struct voltage_map_desc { int step; }; -/* Voltage maps in mV */ +/* Voltage maps in uV */ static const struct voltage_map_desc ldo_voltage_map_desc = { - .min = 800, .max = 3950, .step = 50, + .min = 800000, .max = 3950000, .step = 50000, }; /* LDO1 ~ 18, 21 all */ static const struct voltage_map_desc buck1245_voltage_map_desc = { - .min = 650, .max = 2225, .step = 25, + .min = 650000, .max = 2225000, .step = 25000, }; /* Buck1, 2, 4, 5 */ static const struct voltage_map_desc buck37_voltage_map_desc = { - .min = 750, .max = 3900, .step = 50, + .min = 750000, .max = 3900000, .step = 50000, }; /* Buck3, 7 */ -/* current map in mA */ +/* current map in uA */ static const struct voltage_map_desc charger_current_map_desc = { - .min = 200, .max = 950, .step = 50, + .min = 200000, .max = 950000, .step = 50000, }; static const struct voltage_map_desc topoff_current_map_desc = { - .min = 50, .max = 200, .step = 10, + .min = 50000, .max = 200000, .step = 10000, }; static const struct voltage_map_desc *reg_voltage_map[] = { @@ -194,7 +194,7 @@ static int max8997_list_voltage(struct regulator_dev *rdev, if (val > desc->max) return -EINVAL; - return val * 1000; + return val; } static int max8997_get_enable_register(struct regulator_dev *rdev, @@ -485,7 +485,6 @@ static int max8997_set_voltage_ldobuck(struct regulator_dev *rdev, { struct max8997_data *max8997 = rdev_get_drvdata(rdev); struct i2c_client *i2c = max8997->iodev->i2c; - int min_vol = min_uV / 1000, max_vol = max_uV / 1000; const struct voltage_map_desc *desc; int rid = rdev_get_id(rdev); int i, reg, shift, mask, ret; @@ -509,7 +508,7 @@ static int max8997_set_voltage_ldobuck(struct regulator_dev *rdev, desc = reg_voltage_map[rid]; - i = max8997_get_voltage_proper_val(desc, min_vol, max_vol); + i = max8997_get_voltage_proper_val(desc, min_uV, max_uV); if (i < 0) return i; @@ -557,7 +556,7 @@ static int max8997_set_voltage_ldobuck_time_sel(struct regulator_dev *rdev, case MAX8997_BUCK4: case MAX8997_BUCK5: return DIV_ROUND_UP(desc->step * (new_selector - old_selector), - max8997->ramp_delay); + max8997->ramp_delay * 1000); } return 0; @@ -656,7 +655,6 @@ static int max8997_set_voltage_buck(struct regulator_dev *rdev, const struct voltage_map_desc *desc; int new_val, new_idx, damage, tmp_val, tmp_idx, tmp_dmg; bool gpio_dvs_mode = false; - int min_vol = min_uV / 1000, max_vol = max_uV / 1000; if (rid < MAX8997_BUCK1 || rid > MAX8997_BUCK7) return -EINVAL; @@ -681,7 +679,7 @@ static int max8997_set_voltage_buck(struct regulator_dev *rdev, selector); desc = reg_voltage_map[rid]; - new_val = max8997_get_voltage_proper_val(desc, min_vol, max_vol); + new_val = max8997_get_voltage_proper_val(desc, min_uV, max_uV); if (new_val < 0) return new_val; @@ -1123,8 +1121,8 @@ static int max8997_pmic_probe(struct platform_device *pdev) max8997->buck1_vol[i] = ret = max8997_get_voltage_proper_val( &buck1245_voltage_map_desc, - pdata->buck1_voltage[i] / 1000, - pdata->buck1_voltage[i] / 1000 + + pdata->buck1_voltage[i], + pdata->buck1_voltage[i] + buck1245_voltage_map_desc.step); if (ret < 0) goto err_out; @@ -1132,8 +1130,8 @@ static int max8997_pmic_probe(struct platform_device *pdev) max8997->buck2_vol[i] = ret = max8997_get_voltage_proper_val( &buck1245_voltage_map_desc, - pdata->buck2_voltage[i] / 1000, - pdata->buck2_voltage[i] / 1000 + + pdata->buck2_voltage[i], + pdata->buck2_voltage[i] + buck1245_voltage_map_desc.step); if (ret < 0) goto err_out; @@ -1141,8 +1139,8 @@ static int max8997_pmic_probe(struct platform_device *pdev) max8997->buck5_vol[i] = ret = max8997_get_voltage_proper_val( &buck1245_voltage_map_desc, - pdata->buck5_voltage[i] / 1000, - pdata->buck5_voltage[i] / 1000 + + pdata->buck5_voltage[i], + pdata->buck5_voltage[i] + buck1245_voltage_map_desc.step); if (ret < 0) goto err_out;