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https://github.com/AsahiLinux/u-boot
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84 lines
1.6 KiB
C
84 lines
1.6 KiB
C
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// SPDX-License-Identifier: GPL-2.0+
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/*
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* AXP305 driver
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*
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* (C) Copyright 2020 Jernej Skrabec <jernej.skrabec@siol.net>
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*
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* Based on axp221.c
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* (C) Copyright 2014 Hans de Goede <hdegoede@redhat.com>
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* (C) Copyright 2013 Oliver Schinagl <oliver@schinagl.nl>
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*/
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#include <common.h>
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#include <command.h>
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#include <errno.h>
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#include <asm/arch/pmic_bus.h>
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#include <axp_pmic.h>
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#define AXP305_DCDC4_1600MV_OFFSET 46
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static u8 axp305_mvolt_to_cfg(int mvolt, int min, int max, int div)
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{
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if (mvolt < min)
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mvolt = min;
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else if (mvolt > max)
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mvolt = max;
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return (mvolt - min) / div;
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}
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int axp_set_dcdc4(unsigned int mvolt)
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{
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int ret;
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u8 cfg;
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if (mvolt >= 1600)
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cfg = AXP305_DCDC4_1600MV_OFFSET +
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axp305_mvolt_to_cfg(mvolt, 1600, 3300, 100);
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else
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cfg = axp305_mvolt_to_cfg(mvolt, 600, 1500, 20);
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if (mvolt == 0)
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return pmic_bus_clrbits(AXP305_OUTPUT_CTRL1,
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AXP305_OUTPUT_CTRL1_DCDCD_EN);
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ret = pmic_bus_write(AXP305_DCDCD_VOLTAGE, cfg);
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if (ret)
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return ret;
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return pmic_bus_setbits(AXP305_OUTPUT_CTRL1,
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AXP305_OUTPUT_CTRL1_DCDCD_EN);
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}
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int axp_init(void)
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{
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u8 axp_chip_id;
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int ret;
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ret = pmic_bus_init();
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if (ret)
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return ret;
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ret = pmic_bus_read(AXP305_CHIP_VERSION, &axp_chip_id);
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if (ret)
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return ret;
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if ((axp_chip_id & AXP305_CHIP_VERSION_MASK) != 0x40)
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return -ENODEV;
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return ret;
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}
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#ifndef CONFIG_PSCI_RESET
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int do_poweroff(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
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{
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pmic_bus_write(AXP305_SHUTDOWN, AXP305_POWEROFF);
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/* infinite loop during shutdown */
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while (1) {}
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/* not reached */
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return 0;
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}
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#endif
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