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
pmu_set_nominal(void)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 }
65