static int led_regulator_get_voltage(struct regulator *supply,
enum led_brightness brightness)
{
if (brightness == 0)
return -EINVAL;
return regulator_list_voltage(supply, brightness - 1);
}
static inline int led_regulator_get_max_brightness(struct regulator *supply)
{
int ret;
int voltage = regulator_list_voltage(supply, 0);
if (voltage <= 0)
return 1;
ret = regulator_set_voltage(supply, voltage, voltage);
if (ret < 0)
return 1;
return regulator_count_voltages(supply);
}
static inline int led_regulator_get_max_brightness(struct regulator *supply)
{
int ret;
int voltage = regulator_list_voltage(supply, 0);
if (voltage <= 0)
return 1;
/* even if regulator can't change voltages,
* we still assume it can change status
* and the LED can be turned on and off.
*/
ret = regulator_set_voltage(supply, voltage, voltage);
if (ret < 0)
return 1;
return regulator_count_voltages(supply);
}
/**
* mmc_regulator_get_ocrmask - return mask of supported voltages
* @supply: regulator to use
*
* This returns either a negative errno, or a mask of voltages that
* can be provided to MMC/SD/SDIO devices using the specified voltage
* regulator. This would normally be called before registering the
* MMC host adapter.
*/
int mmc_regulator_get_ocrmask(struct regulator *supply)
{
int result = 0;
int count;
int i;
count = regulator_count_voltages(supply);
if (count < 0)
return count;
for (i = 0; i < count; i++) {
int vdd_uV;
int vdd_mV;
vdd_uV = regulator_list_voltage(supply, i);
if (vdd_uV <= 0)
continue;
vdd_mV = vdd_uV / 1000;
result |= mmc_vddrange_to_ocrmask(vdd_mV, vdd_mV);
}
return result;
}
