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regulator: palmas: Return raw register values as the selectors in [get|set]_voltage_sel 

Don't adjust the selector in [get|set]_voltage_sel, fix it in list_voltage() instead.

For smps*(except smps10), the vsel reg-value and voltage mapping as below:

reg-value       volt (uV) ( Assume RANGE is x1 )
0               0
1               500000
2               500000
3               500000
4               500000
5               500000
6               500000 (0.49V + 1 * 0.01V) * RANGE
7               510000 (0.49V + 2 * 0.01V) * RANGE
8               520000 (0.49V + 3 * 0.01V) * RANGE
9               530000 (0.49V + 4 * 0.01V) * RANGE
....

The linear mapping is start from selector 6.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Axel Lin 2012-11-29 09:59:16 +08:00 committed by Mark Brown
parent 9489e9dcae
commit ad02e84687
1 changed files with 14 additions and 24 deletions
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38
drivers/regulator/palmas-regulator.c
View File

@ -309,19 +309,22 @@ static int palmas_list_voltage_smps(struct regulator_dev *dev,
int id = rdev_get_id(dev);
int mult = 1;
if (!selector)
return 0;
/* Read the multiplier set in VSEL register to return
* the correct voltage.
*/
if (pmic->range[id])
mult = 2;
/* Voltage is (0.49V + (selector * 0.01V)) * RANGE
* as defined in data sheet. RANGE is either x1 or x2
*/
return (490000 + (selector * 10000)) * mult;
if (selector == 0)
return 0;
else if (selector < 6)
return 500000 * mult;
else
/* Voltage is linear mapping starting from selector 6,
* volt = (0.49V + ((selector - 5) * 0.01V)) * RANGE
* RANGE is either x1 or x2
*/
return (490000 + ((selector - 5) * 10000)) * mult;
}
static int palmas_get_voltage_smps_sel(struct regulator_dev *dev)
@ -338,15 +341,6 @@ static int palmas_get_voltage_smps_sel(struct regulator_dev *dev)
selector = reg & PALMAS_SMPS12_VOLTAGE_VSEL_MASK;
/* Adjust selector to match list_voltage ranges */
if ((selector > 0) && (selector < 6))
selector = 6;
if (!selector)
selector = 5;
if (selector > 121)
selector = 121;
selector -= 5;
return selector;
}
@ -355,19 +349,15 @@ static int palmas_set_voltage_smps_sel(struct regulator_dev *dev,
{
struct palmas_pmic *pmic = rdev_get_drvdata(dev);
int id = rdev_get_id(dev);
unsigned int reg = 0;
unsigned int addr;
unsigned int reg, addr;
addr = palmas_regs_info[id].vsel_addr;
reg = selector;
/* Make sure we don't change the value of RANGE */
if (pmic->range[id])
reg |= PALMAS_SMPS12_VOLTAGE_RANGE;
/* Adjust the linux selector into range used in VSEL register */
if (selector)
reg |= selector + 5;
palmas_smps_write(pmic->palmas, addr, reg);
return 0;
@ -386,11 +376,11 @@ static int palmas_map_voltage_smps(struct regulator_dev *rdev,
if (pmic->range[id]) { /* RANGE is x2 */
if (min_uV < 1000000)
min_uV = 1000000;
ret = DIV_ROUND_UP(min_uV - 1000000, 20000) + 1;
ret = DIV_ROUND_UP(min_uV - 1000000, 20000) + 6;
} else { /* RANGE is x1 */
if (min_uV < 500000)
min_uV = 500000;
ret = DIV_ROUND_UP(min_uV - 500000, 10000) + 1;
ret = DIV_ROUND_UP(min_uV - 500000, 10000) + 6;
}
/* Map back into a voltage to verify we're still in bounds */