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d678a59d2d
When bringing in the series 'arm: dts: am62-beagleplay: Fix Beagleplay Ethernet"' I failed to notice that b4 noticed it was based on next and so took that as the base commit and merged that part of next to master. This reverts commitc8ffd1356d, reversing changes made to2ee6f3a5f7. Reported-by: Jonas Karlman <jonas@kwiboo.se> Signed-off-by: Tom Rini <trini@konsulko.com>
135 lines
2.7 KiB
C
135 lines
2.7 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* AXP313(a) driver
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*
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* (C) Copyright 2023 Arm Ltd.
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*
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* Based on axp305.c
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* (C) Copyright 2020 Jernej Skrabec <jernej.skrabec@siol.net>
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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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enum axp313_reg {
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AXP313_CHIP_VERSION = 0x03,
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AXP313_OUTPUT_CTRL = 0x10,
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AXP313_DCDC1_CTRL = 0x13,
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AXP313_SHUTDOWN = 0x1a,
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};
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#define AXP313_CHIP_VERSION_MASK 0xcf
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#define AXP313_CHIP_VERSION_AXP1530 0x48
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#define AXP313_CHIP_VERSION_AXP313A 0x4b
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#define AXP313_CHIP_VERSION_AXP313B 0x4c
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#define AXP313_DCDC_SPLIT_OFFSET 71
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#define AXP313_DCDC_SPLIT_MVOLT 1200
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#define AXP313_POWEROFF BIT(7)
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static u8 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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static int axp_set_dcdc(int dcdc_num, unsigned int mvolt)
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{
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int ret;
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u8 cfg, enable_mask = 1U << (dcdc_num - 1);
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int volt_reg = AXP313_DCDC1_CTRL + dcdc_num - 1;
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int max_mV;
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switch (dcdc_num) {
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case 1:
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case 2:
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max_mV = 1540;
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break;
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case 3:
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/*
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* The manual defines a different split point, but tests
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* show that it's the same 1200mV as for DCDC1/2.
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*/
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max_mV = 1840;
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break;
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default:
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return -EINVAL;
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}
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if (mvolt > AXP313_DCDC_SPLIT_MVOLT)
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cfg = AXP313_DCDC_SPLIT_OFFSET + mvolt_to_cfg(mvolt,
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AXP313_DCDC_SPLIT_MVOLT + 20, max_mV, 20);
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else
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cfg = mvolt_to_cfg(mvolt, 500, AXP313_DCDC_SPLIT_MVOLT, 10);
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if (mvolt == 0)
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return pmic_bus_clrbits(AXP313_OUTPUT_CTRL, enable_mask);
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debug("DCDC%d: writing 0x%x to reg 0x%x\n", dcdc_num, cfg, volt_reg);
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ret = pmic_bus_write(volt_reg, cfg);
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if (ret)
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return ret;
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return pmic_bus_setbits(AXP313_OUTPUT_CTRL, enable_mask);
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}
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int axp_set_dcdc2(unsigned int mvolt)
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{
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return axp_set_dcdc(2, mvolt);
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}
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int axp_set_dcdc3(unsigned int mvolt)
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{
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return axp_set_dcdc(3, mvolt);
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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(AXP313_CHIP_VERSION, &axp_chip_id);
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if (ret)
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return ret;
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axp_chip_id &= AXP313_CHIP_VERSION_MASK;
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switch (axp_chip_id) {
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case AXP313_CHIP_VERSION_AXP1530:
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case AXP313_CHIP_VERSION_AXP313A:
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case AXP313_CHIP_VERSION_AXP313B:
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break;
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default:
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debug("unknown PMIC: 0x%x\n", axp_chip_id);
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return -EINVAL;
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}
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return ret;
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}
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#if !CONFIG_IS_ENABLED(ARM_PSCI_FW) && !IS_ENABLED(CONFIG_SYSRESET_CMD_POWEROFF)
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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(AXP313_SHUTDOWN, AXP313_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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