blob: 049ef07f7467f878ecb7c5e021e46dc5d6f844eb [file] [log] [blame]
Jernej Skrabecfbd37d82021-01-11 21:11:33 +01001// SPDX-License-Identifier: GPL-2.0+
2/*
3 * AXP305 driver
4 *
5 * (C) Copyright 2020 Jernej Skrabec <jernej.skrabec@siol.net>
6 *
7 * Based on axp221.c
8 * (C) Copyright 2014 Hans de Goede <hdegoede@redhat.com>
9 * (C) Copyright 2013 Oliver Schinagl <oliver@schinagl.nl>
10 */
11
12#include <common.h>
13#include <command.h>
14#include <errno.h>
15#include <asm/arch/pmic_bus.h>
16#include <axp_pmic.h>
17
18#define AXP305_DCDC4_1600MV_OFFSET 46
19
20static u8 axp305_mvolt_to_cfg(int mvolt, int min, int max, int div)
21{
22 if (mvolt < min)
23 mvolt = min;
24 else if (mvolt > max)
25 mvolt = max;
26
27 return (mvolt - min) / div;
28}
29
30int axp_set_dcdc4(unsigned int mvolt)
31{
32 int ret;
33 u8 cfg;
34
35 if (mvolt >= 1600)
36 cfg = AXP305_DCDC4_1600MV_OFFSET +
37 axp305_mvolt_to_cfg(mvolt, 1600, 3300, 100);
38 else
39 cfg = axp305_mvolt_to_cfg(mvolt, 600, 1500, 20);
40
41 if (mvolt == 0)
42 return pmic_bus_clrbits(AXP305_OUTPUT_CTRL1,
43 AXP305_OUTPUT_CTRL1_DCDCD_EN);
44
45 ret = pmic_bus_write(AXP305_DCDCD_VOLTAGE, cfg);
46 if (ret)
47 return ret;
48
49 return pmic_bus_setbits(AXP305_OUTPUT_CTRL1,
50 AXP305_OUTPUT_CTRL1_DCDCD_EN);
51}
52
53int axp_init(void)
54{
55 u8 axp_chip_id;
56 int ret;
57
58 ret = pmic_bus_init();
59 if (ret)
60 return ret;
61
62 ret = pmic_bus_read(AXP305_CHIP_VERSION, &axp_chip_id);
63 if (ret)
64 return ret;
65
66 if ((axp_chip_id & AXP305_CHIP_VERSION_MASK) != 0x40)
67 return -ENODEV;
68
69 return ret;
70}
71
Samuel Holland830e1612021-08-22 18:18:05 -050072#if !CONFIG_IS_ENABLED(ARM_PSCI_FW) && !IS_ENABLED(CONFIG_SYSRESET_CMD_POWEROFF)
Jernej Skrabecfbd37d82021-01-11 21:11:33 +010073int do_poweroff(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
74{
75 pmic_bus_write(AXP305_SHUTDOWN, AXP305_POWEROFF);
76
77 /* infinite loop during shutdown */
78 while (1) {}
79
80 /* not reached */
81 return 0;
82}
83#endif