diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/power/Kconfig | 10 | ||||
| -rw-r--r-- | drivers/power/axp221.c | 33 |
2 files changed, 43 insertions, 0 deletions
diff --git a/drivers/power/Kconfig b/drivers/power/Kconfig index e68e16b321..f8f0239484 100644 --- a/drivers/power/Kconfig +++ b/drivers/power/Kconfig @@ -63,3 +63,13 @@ config AXP221_ALDO3_VOLT Set the voltage (mV) to program the axp221 aldo3 at, set to 0 to disable aldo3. This is typically connected to VCC-PLL and AVCC and must be set to 3V. + +config AXP221_ELDO3_VOLT + int "axp221 eldo3 voltage" + depends on AXP221_POWER + default 0 + ---help--- + Set the voltage (mV) to program the axp221 eldo3 at, set to 0 to + disable eldo3. On some A31(s) tablets it might be used to supply + 1.2V for the SSD2828 chip (converter of parallel LCD interface + into MIPI DSI). diff --git a/drivers/power/axp221.c b/drivers/power/axp221.c index 4c86f099a2..58bbd45a02 100644 --- a/drivers/power/axp221.c +++ b/drivers/power/axp221.c @@ -302,6 +302,39 @@ int axp221_set_aldo3(unsigned int mvolt) AXP221_OUTPUT_CTRL3_ALDO3_EN); } +int axp221_set_eldo(int eldo_num, unsigned int mvolt) +{ + int ret; + u8 cfg = axp221_mvolt_to_cfg(mvolt, 700, 3300, 100); + u8 addr, bits; + + switch (eldo_num) { + case 3: + addr = AXP221_ELDO3_CTRL; + bits = AXP221_OUTPUT_CTRL2_ELDO3_EN; + break; + case 2: + addr = AXP221_ELDO2_CTRL; + bits = AXP221_OUTPUT_CTRL2_ELDO2_EN; + break; + case 1: + addr = AXP221_ELDO1_CTRL; + bits = AXP221_OUTPUT_CTRL2_ELDO1_EN; + break; + default: + return -EINVAL; + } + + if (mvolt == 0) + return axp221_clrbits(AXP221_OUTPUT_CTRL2, bits); + + ret = pmic_bus_write(addr, cfg); + if (ret) + return ret; + + return axp221_setbits(AXP221_OUTPUT_CTRL2, bits); +} + int axp221_init(void) { /* This cannot be 0 because it is used in SPL before BSS is ready */ |