diff options
Diffstat (limited to 'drivers/regulator/max1586.c')
| -rw-r--r-- | drivers/regulator/max1586.c | 108 |
1 files changed, 30 insertions, 78 deletions
diff --git a/drivers/regulator/max1586.c b/drivers/regulator/max1586.c index b9444ee08da9..f67af3c1b963 100644 --- a/drivers/regulator/max1586.c +++ b/drivers/regulator/max1586.c @@ -48,6 +48,14 @@ struct max1586_data { }; /* + * V6 voltage + * On I2C bus, sending a "x" byte to the max1586 means : + * set V6 to either 0V, 1.8V, 2.5V, 3V depending on (x & 0x3) + * As regulator framework doesn't accept voltages to be 0V, we use 1uV. + */ +static int v6_voltages_uv[] = { 1, 1800000, 2500000, 3000000 }; + +/* * V3 voltage * On I2C bus, sending a "x" byte to the max1586 means : * set V3 to 0.700V + (x & 0x1f) * 0.025V @@ -55,113 +63,49 @@ struct max1586_data { * R24 and R25=100kOhm as described in the data sheet. * The gain is approximately: 1 + R24/R25 + R24/185.5kOhm */ -static int max1586_v3_calc_voltage(struct max1586_data *max1586, - unsigned selector) -{ - unsigned range_uV = max1586->max_uV - max1586->min_uV; - - return max1586->min_uV + (selector * range_uV / MAX1586_V3_MAX_VSEL); -} - -static int max1586_v3_set(struct regulator_dev *rdev, int min_uV, int max_uV, - unsigned *selector) +static int max1586_v3_set_voltage_sel(struct regulator_dev *rdev, + unsigned selector) { struct max1586_data *max1586 = rdev_get_drvdata(rdev); struct i2c_client *client = max1586->client; - unsigned range_uV = max1586->max_uV - max1586->min_uV; u8 v3_prog; - if (min_uV > max1586->max_uV || max_uV < max1586->min_uV) - return -EINVAL; - if (min_uV < max1586->min_uV) - min_uV = max1586->min_uV; - - *selector = DIV_ROUND_UP((min_uV - max1586->min_uV) * - MAX1586_V3_MAX_VSEL, range_uV); - if (max1586_v3_calc_voltage(max1586, *selector) > max_uV) - return -EINVAL; - dev_dbg(&client->dev, "changing voltage v3 to %dmv\n", - max1586_v3_calc_voltage(max1586, *selector) / 1000); + regulator_list_voltage_linear(rdev, selector) / 1000); - v3_prog = I2C_V3_SELECT | (u8) *selector; + v3_prog = I2C_V3_SELECT | (u8) selector; return i2c_smbus_write_byte(client, v3_prog); } -static int max1586_v3_list(struct regulator_dev *rdev, unsigned selector) -{ - struct max1586_data *max1586 = rdev_get_drvdata(rdev); - - if (selector > MAX1586_V3_MAX_VSEL) - return -EINVAL; - return max1586_v3_calc_voltage(max1586, selector); -} - -/* - * V6 voltage - * On I2C bus, sending a "x" byte to the max1586 means : - * set V6 to either 0V, 1.8V, 2.5V, 3V depending on (x & 0x3) - * As regulator framework doesn't accept voltages to be 0V, we use 1uV. - */ -static int max1586_v6_calc_voltage(unsigned selector) -{ - static int voltages_uv[] = { 1, 1800000, 2500000, 3000000 }; - - return voltages_uv[selector]; -} - -static int max1586_v6_set(struct regulator_dev *rdev, int min_uV, int max_uV, - unsigned int *selector) +static int max1586_v6_set_voltage_sel(struct regulator_dev *rdev, + unsigned int selector) { struct i2c_client *client = rdev_get_drvdata(rdev); u8 v6_prog; - if (min_uV < MAX1586_V6_MIN_UV || min_uV > MAX1586_V6_MAX_UV) - return -EINVAL; - if (max_uV < MAX1586_V6_MIN_UV || max_uV > MAX1586_V6_MAX_UV) - return -EINVAL; - - if (min_uV < 1800000) - *selector = 0; - else if (min_uV < 2500000) - *selector = 1; - else if (min_uV < 3000000) - *selector = 2; - else if (min_uV >= 3000000) - *selector = 3; - - if (max1586_v6_calc_voltage(*selector) > max_uV) - return -EINVAL; - dev_dbg(&client->dev, "changing voltage v6 to %dmv\n", - max1586_v6_calc_voltage(*selector) / 1000); + rdev->desc->volt_table[selector] / 1000); - v6_prog = I2C_V6_SELECT | (u8) *selector; + v6_prog = I2C_V6_SELECT | (u8) selector; return i2c_smbus_write_byte(client, v6_prog); } -static int max1586_v6_list(struct regulator_dev *rdev, unsigned selector) -{ - if (selector > MAX1586_V6_MAX_VSEL) - return -EINVAL; - return max1586_v6_calc_voltage(selector); -} - /* * The Maxim 1586 controls V3 and V6 voltages, but offers no way of reading back * the set up value. */ static struct regulator_ops max1586_v3_ops = { - .set_voltage = max1586_v3_set, - .list_voltage = max1586_v3_list, + .set_voltage_sel = max1586_v3_set_voltage_sel, + .list_voltage = regulator_list_voltage_linear, + .map_voltage = regulator_map_voltage_linear, }; static struct regulator_ops max1586_v6_ops = { - .set_voltage = max1586_v6_set, - .list_voltage = max1586_v6_list, + .set_voltage_sel = max1586_v6_set_voltage_sel, + .list_voltage = regulator_list_voltage_table, }; -static const struct regulator_desc max1586_reg[] = { +static struct regulator_desc max1586_reg[] = { { .name = "Output_V3", .id = MAX1586_V3, @@ -176,6 +120,7 @@ static const struct regulator_desc max1586_reg[] = { .ops = &max1586_v6_ops, .type = REGULATOR_VOLTAGE, .n_voltages = MAX1586_V6_MAX_VSEL + 1, + .volt_table = v6_voltages_uv, .owner = THIS_MODULE, }, }; @@ -213,6 +158,13 @@ static int __devinit max1586_pmic_probe(struct i2c_client *client, goto err; } + if (id == MAX1586_V3) { + max1586_reg[id].min_uV = max1586->min_uV; + max1586_reg[id].uV_step = + (max1586->max_uV - max1586->min_uV) / + MAX1586_V3_MAX_VSEL; + } + config.dev = &client->dev; config.init_data = pdata->subdevs[i].platform_data; config.driver_data = max1586; |