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- // SPDX-License-Identifier: GPL-2.0+
- /*
- * AXP305 driver
- *
- * (C) Copyright 2020 Jernej Skrabec <jernej.skrabec@siol.net>
- *
- * Based on axp221.c
- * (C) Copyright 2014 Hans de Goede <hdegoede@redhat.com>
- * (C) Copyright 2013 Oliver Schinagl <oliver@schinagl.nl>
- */
- #include <common.h>
- #include <command.h>
- #include <errno.h>
- #include <asm/arch/pmic_bus.h>
- #include <axp_pmic.h>
- #define AXP305_DCDC4_1600MV_OFFSET 46
- static u8 axp305_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_dcdc4(unsigned int mvolt)
- {
- int ret;
- u8 cfg;
- if (mvolt >= 1600)
- cfg = AXP305_DCDC4_1600MV_OFFSET +
- axp305_mvolt_to_cfg(mvolt, 1600, 3300, 100);
- else
- cfg = axp305_mvolt_to_cfg(mvolt, 600, 1500, 20);
- if (mvolt == 0)
- return pmic_bus_clrbits(AXP305_OUTPUT_CTRL1,
- AXP305_OUTPUT_CTRL1_DCDCD_EN);
- ret = pmic_bus_write(AXP305_DCDCD_VOLTAGE, cfg);
- if (ret)
- return ret;
- return pmic_bus_setbits(AXP305_OUTPUT_CTRL1,
- AXP305_OUTPUT_CTRL1_DCDCD_EN);
- }
- int axp_init(void)
- {
- u8 axp_chip_id;
- int ret;
- ret = pmic_bus_init();
- if (ret)
- return ret;
- ret = pmic_bus_read(AXP305_CHIP_VERSION, &axp_chip_id);
- if (ret)
- return ret;
- if ((axp_chip_id & AXP305_CHIP_VERSION_MASK) != 0x40)
- return -ENODEV;
- return ret;
- }
- #ifndef CONFIG_PSCI_RESET
- int do_poweroff(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
- {
- pmic_bus_write(AXP305_SHUTDOWN, AXP305_POWEROFF);
- /* infinite loop during shutdown */
- while (1) {}
- /* not reached */
- return 0;
- }
- #endif
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