mirror of
https://github.com/AsahiLinux/u-boot
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65 lines
1.6 KiB
C
65 lines
1.6 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (c) 2011 The Chromium OS Authors.
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* (C) Copyright 2010,2011 NVIDIA Corporation <www.nvidia.com>
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*/
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#include <common.h>
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#include <i2c.h>
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#include <log.h>
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#include <tps6586x.h>
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#include <asm/io.h>
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#include <asm/arch/tegra.h>
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#include <asm/arch-tegra/ap.h>
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#include <asm/arch-tegra/tegra_i2c.h>
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#include <asm/arch-tegra/sys_proto.h>
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#define VDD_CORE_NOMINAL_T25 0x17 /* 1.3v */
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#define VDD_CPU_NOMINAL_T25 0x10 /* 1.125v */
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#define VDD_CORE_NOMINAL_T20 0x16 /* 1.275v */
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#define VDD_CPU_NOMINAL_T20 0x0f /* 1.1v */
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#define VDD_RELATION 0x02 /* 50mv */
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#define VDD_TRANSITION_STEP 0x06 /* 150mv */
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#define VDD_TRANSITION_RATE 0x06 /* 3.52mv/us */
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#define PMI_I2C_ADDRESS 0x34 /* chip requires this address */
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int pmu_set_nominal(void)
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{
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struct udevice *bus, *dev;
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int core, cpu;
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int ret;
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/* by default, the table has been filled with T25 settings */
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switch (tegra_get_chip_sku()) {
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case TEGRA_SOC_T20:
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core = VDD_CORE_NOMINAL_T20;
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cpu = VDD_CPU_NOMINAL_T20;
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break;
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case TEGRA_SOC_T25:
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core = VDD_CORE_NOMINAL_T25;
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cpu = VDD_CPU_NOMINAL_T25;
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break;
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default:
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debug("%s: Unknown SKU id\n", __func__);
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return -1;
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}
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ret = tegra_i2c_get_dvc_bus(&bus);
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if (ret) {
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debug("%s: Cannot find DVC I2C bus\n", __func__);
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return ret;
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}
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ret = i2c_get_chip(bus, PMI_I2C_ADDRESS, 1, &dev);
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if (ret) {
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debug("%s: Cannot find DVC I2C chip\n", __func__);
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return ret;
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}
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tps6586x_init(dev);
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tps6586x_set_pwm_mode(TPS6586X_PWM_SM1);
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return tps6586x_adjust_sm0_sm1(core, cpu, VDD_TRANSITION_STEP,
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VDD_TRANSITION_RATE, VDD_RELATION);
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}
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