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Merge branch 'master' of git://git.denx.de/u-boot-sunxi
[u-boot] / 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 <tps6586x.h>
10 #include <asm/io.h>
11 #include <asm/arch/tegra.h>
12 #include <asm/arch-tegra/ap.h>
13 #include <asm/arch-tegra/tegra_i2c.h>
14 #include <asm/arch-tegra/sys_proto.h>
15
16 #define VDD_CORE_NOMINAL_T25    0x17    /* 1.3v */
17 #define VDD_CPU_NOMINAL_T25     0x10    /* 1.125v */
18
19 #define VDD_CORE_NOMINAL_T20    0x16    /* 1.275v */
20 #define VDD_CPU_NOMINAL_T20     0x0f    /* 1.1v */
21
22 #define VDD_RELATION            0x02    /*  50mv */
23 #define VDD_TRANSITION_STEP     0x06    /* 150mv */
24 #define VDD_TRANSITION_RATE     0x06    /* 3.52mv/us */
25
26 #define PMI_I2C_ADDRESS 0x34    /* chip requires this address */
27
28 int pmu_set_nominal(void)
29 {
30         struct udevice *bus, *dev;
31         int core, cpu;
32         int ret;
33
34         /* by default, the table has been filled with T25 settings */
35         switch (tegra_get_chip_sku()) {
36         case TEGRA_SOC_T20:
37                 core = VDD_CORE_NOMINAL_T20;
38                 cpu = VDD_CPU_NOMINAL_T20;
39                 break;
40         case TEGRA_SOC_T25:
41                 core = VDD_CORE_NOMINAL_T25;
42                 cpu = VDD_CPU_NOMINAL_T25;
43                 break;
44         default:
45                 debug("%s: Unknown SKU id\n", __func__);
46                 return -1;
47         }
48
49         ret = tegra_i2c_get_dvc_bus(&bus);
50         if (ret) {
51                 debug("%s: Cannot find DVC I2C bus\n", __func__);
52                 return ret;
53         }
54         ret = i2c_get_chip(bus, PMI_I2C_ADDRESS, 1, &dev);
55         if (ret) {
56                 debug("%s: Cannot find DVC I2C chip\n", __func__);
57                 return ret;
58         }
59
60         tps6586x_init(dev);
61         tps6586x_set_pwm_mode(TPS6586X_PWM_SM1);
62         return tps6586x_adjust_sm0_sm1(core, cpu, VDD_TRANSITION_STEP,
63                                 VDD_TRANSITION_RATE, VDD_RELATION);
64 }