diff options
Diffstat (limited to 'drivers/power/axp818.c')
-rw-r--r-- | drivers/power/axp818.c | 132 |
1 files changed, 132 insertions, 0 deletions
diff --git a/drivers/power/axp818.c b/drivers/power/axp818.c new file mode 100644 index 0000000000..4b21a83879 --- /dev/null +++ b/drivers/power/axp818.c @@ -0,0 +1,132 @@ +/* + * AXP818 driver based on AXP221 driver + * + * + * (C) Copyright 2015 Vishnu Patekar <vishnuptekar0510@gmail.com> + * + * Based on axp221.c + * (C) Copyright 2014 Hans de Goede <hdegoede@redhat.com> + * (C) Copyright 2013 Oliver Schinagl <oliver@schinagl.nl> + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <errno.h> +#include <asm/arch/gpio.h> +#include <asm/arch/pmic_bus.h> +#include <axp_pmic.h> + +static u8 axp818_mvolt_to_cfg(int mvolt, int min, int max, int div) +{ + if (mvolt < min) + mvolt = min; + else if (mvolt > max) + mvolt = max; + + return (mvolt - min) / div; +} + +int axp_set_dcdc1(unsigned int mvolt) +{ + int ret; + u8 cfg = axp818_mvolt_to_cfg(mvolt, 1600, 3400, 100); + + if (mvolt == 0) + return pmic_bus_clrbits(AXP818_OUTPUT_CTRL1, + AXP818_OUTPUT_CTRL1_DCDC1_EN); + + ret = pmic_bus_write(AXP818_DCDC1_CTRL, cfg); + if (ret) + return ret; + + return pmic_bus_setbits(AXP818_OUTPUT_CTRL1, + AXP818_OUTPUT_CTRL1_DCDC1_EN); +} + +int axp_set_dcdc2(unsigned int mvolt) +{ + int ret; + u8 cfg; + + if (mvolt >= 1220) + cfg = 70 + axp818_mvolt_to_cfg(mvolt, 1220, 1300, 20); + else + cfg = axp818_mvolt_to_cfg(mvolt, 500, 1200, 10); + + if (mvolt == 0) + return pmic_bus_clrbits(AXP818_OUTPUT_CTRL1, + AXP818_OUTPUT_CTRL1_DCDC2_EN); + + ret = pmic_bus_write(AXP818_DCDC2_CTRL, cfg); + if (ret) + return ret; + + return pmic_bus_setbits(AXP818_OUTPUT_CTRL1, + AXP818_OUTPUT_CTRL1_DCDC2_EN); +} + +int axp_set_dcdc3(unsigned int mvolt) +{ + int ret; + u8 cfg; + + if (mvolt >= 1220) + cfg = 70 + axp818_mvolt_to_cfg(mvolt, 1220, 1300, 20); + else + cfg = axp818_mvolt_to_cfg(mvolt, 500, 1200, 10); + + if (mvolt == 0) + return pmic_bus_clrbits(AXP818_OUTPUT_CTRL1, + AXP818_OUTPUT_CTRL1_DCDC3_EN); + + ret = pmic_bus_write(AXP818_DCDC3_CTRL, cfg); + if (ret) + return ret; + + return pmic_bus_setbits(AXP818_OUTPUT_CTRL1, + AXP818_OUTPUT_CTRL1_DCDC3_EN); +} + +int axp_set_dcdc5(unsigned int mvolt) +{ + int ret; + u8 cfg; + + if (mvolt >= 1140) + cfg = 32 + axp818_mvolt_to_cfg(mvolt, 1140, 1840, 20); + else + cfg = axp818_mvolt_to_cfg(mvolt, 800, 1120, 10); + + if (mvolt == 0) + return pmic_bus_clrbits(AXP818_OUTPUT_CTRL1, + AXP818_OUTPUT_CTRL1_DCDC5_EN); + + ret = pmic_bus_write(AXP818_DCDC5_CTRL, cfg); + if (ret) + return ret; + + return pmic_bus_setbits(AXP818_OUTPUT_CTRL1, + AXP818_OUTPUT_CTRL1_DCDC5_EN); +} + +int axp_init(void) +{ + u8 axp_chip_id; + int ret; + + ret = pmic_bus_init(); + if (ret) + return ret; + + ret = pmic_bus_read(AXP818_CHIP_ID, &axp_chip_id); + if (ret) + return ret; + + if (!(axp_chip_id == 0x51)) + return -ENODEV; + else + return ret; + + return 0; +} |