Merge tag 'u-boot-atmel-fixes-2020.07-a' of https://gitlab.denx.de/u-boot/custodians...
[oweals/u-boot.git] / arch / arm / mach-tegra / tegra20 / pmu.c
1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * Copyright (c) 2011 The Chromium OS Authors.
4  * (C) Copyright 2010,2011 NVIDIA Corporation <www.nvidia.com>
5  */
6
7 #include <common.h>
8 #include <i2c.h>
9 #include <log.h>
10 #include <tps6586x.h>
11 #include <asm/io.h>
12 #include <asm/arch/tegra.h>
13 #include <asm/arch-tegra/ap.h>
14 #include <asm/arch-tegra/tegra_i2c.h>
15 #include <asm/arch-tegra/sys_proto.h>
16
17 #define VDD_CORE_NOMINAL_T25    0x17    /* 1.3v */
18 #define VDD_CPU_NOMINAL_T25     0x10    /* 1.125v */
19
20 #define VDD_CORE_NOMINAL_T20    0x16    /* 1.275v */
21 #define VDD_CPU_NOMINAL_T20     0x0f    /* 1.1v */
22
23 #define VDD_RELATION            0x02    /*  50mv */
24 #define VDD_TRANSITION_STEP     0x06    /* 150mv */
25 #define VDD_TRANSITION_RATE     0x06    /* 3.52mv/us */
26
27 #define PMI_I2C_ADDRESS 0x34    /* chip requires this address */
28
29 int pmu_set_nominal(void)
30 {
31         struct udevice *bus, *dev;
32         int core, cpu;
33         int ret;
34
35         /* by default, the table has been filled with T25 settings */
36         switch (tegra_get_chip_sku()) {
37         case TEGRA_SOC_T20:
38                 core = VDD_CORE_NOMINAL_T20;
39                 cpu = VDD_CPU_NOMINAL_T20;
40                 break;
41         case TEGRA_SOC_T25:
42                 core = VDD_CORE_NOMINAL_T25;
43                 cpu = VDD_CPU_NOMINAL_T25;
44                 break;
45         default:
46                 debug("%s: Unknown SKU id\n", __func__);
47                 return -1;
48         }
49
50         ret = tegra_i2c_get_dvc_bus(&bus);
51         if (ret) {
52                 debug("%s: Cannot find DVC I2C bus\n", __func__);
53                 return ret;
54         }
55         ret = i2c_get_chip(bus, PMI_I2C_ADDRESS, 1, &dev);
56         if (ret) {
57                 debug("%s: Cannot find DVC I2C chip\n", __func__);
58                 return ret;
59         }
60
61         tps6586x_init(dev);
62         tps6586x_set_pwm_mode(TPS6586X_PWM_SM1);
63         return tps6586x_adjust_sm0_sm1(core, cpu, VDD_TRANSITION_STEP,
64                                 VDD_TRANSITION_RATE, VDD_RELATION);
65 }