[people/ms/u-boot.git] / arch / arm / cpu / armv7 / tegra20 / pmu.c

/*
 * Copyright (c) 2011 The Chromium OS Authors.
 * (C) Copyright 2010,2011 NVIDIA Corporation <www.nvidia.com>
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of
 * the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 */

#include <common.h>
#include <tps6586x.h>
#include <asm/io.h>
#include <asm/arch/ap20.h>
#include <asm/arch/tegra20.h>
#include <asm/arch/tegra_i2c.h>
#include <asm/arch/sys_proto.h>

#define VDD_CORE_NOMINAL_T25	0x17	/* 1.3v */
#define VDD_CPU_NOMINAL_T25	0x10	/* 1.125v */

#define VDD_CORE_NOMINAL_T20	0x16	/* 1.275v */
#define VDD_CPU_NOMINAL_T20	0x0f	/* 1.1v */

#define VDD_RELATION		0x02	/*  50mv */
#define VDD_TRANSITION_STEP	0x06	/* 150mv */
#define VDD_TRANSITION_RATE	0x06	/* 3.52mv/us */

int pmu_set_nominal(void)
{
	int core, cpu, bus;

	/* by default, the table has been filled with T25 settings */
	switch (tegra_get_chip_type()) {
	case TEGRA_SOC_T20:
		core = VDD_CORE_NOMINAL_T20;
		cpu = VDD_CPU_NOMINAL_T20;
		break;
	case TEGRA_SOC_T25:
		core = VDD_CORE_NOMINAL_T25;
		cpu = VDD_CPU_NOMINAL_T25;
		break;
	default:
		debug("%s: Unknown chip type\n", __func__);
		return -1;
	}

	bus = tegra_i2c_get_dvc_bus_num();
	if (bus == -1) {
		debug("%s: Cannot find DVC I2C bus\n", __func__);
		return -1;
	}
	tps6586x_init(bus);
	tps6586x_set_pwm_mode(TPS6586X_PWM_SM1);
	return tps6586x_adjust_sm0_sm1(core, cpu, VDD_TRANSITION_STEP,
				VDD_TRANSITION_RATE, VDD_RELATION);
}
Commit	Line	Data
6860b4a1 JZ	1	/*
	2	* Copyright (c) 2011 The Chromium OS Authors.
	3	* (C) Copyright 2010,2011 NVIDIA Corporation <www.nvidia.com>
	4	*
	5	* See file CREDITS for list of people who contributed to this
	6	* project.
	7	*
	8	* This program is free software; you can redistribute it and/or
	9	* modify it under the terms of the GNU General Public License as
	10	* published by the Free Software Foundation; either version 2 of
	11	* the License, or (at your option) any later version.
	12	*
	13	* This program is distributed in the hope that it will be useful,
	14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	16	* GNU General Public License for more details.
	17	*
	18	* You should have received a copy of the GNU General Public License
	19	* along with this program; if not, write to the Free Software
	20	* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
	21	* MA 02111-1307 USA
	22	*/
	23
	24	#include <common.h>
	25	#include <tps6586x.h>
	26	#include <asm/io.h>
	27	#include <asm/arch/ap20.h>
00a2749d	28	#include <asm/arch/tegra20.h>
6860b4a1 JZ	29	#include <asm/arch/tegra_i2c.h>
	30	#include <asm/arch/sys_proto.h>
	31
	32	#define VDD_CORE_NOMINAL_T25 0x17 /* 1.3v */
	33	#define VDD_CPU_NOMINAL_T25 0x10 /* 1.125v */
	34
	35	#define VDD_CORE_NOMINAL_T20 0x16 /* 1.275v */
	36	#define VDD_CPU_NOMINAL_T20 0x0f /* 1.1v */
	37
	38	#define VDD_RELATION 0x02 /* 50mv */
	39	#define VDD_TRANSITION_STEP 0x06 /* 150mv */
	40	#define VDD_TRANSITION_RATE 0x06 /* 3.52mv/us */
	41
	42	int pmu_set_nominal(void)
	43	{
	44	int core, cpu, bus;
	45
	46	/* by default, the table has been filled with T25 settings */
	47	switch (tegra_get_chip_type()) {
	48	case TEGRA_SOC_T20:
	49	core = VDD_CORE_NOMINAL_T20;
	50	cpu = VDD_CPU_NOMINAL_T20;
	51	break;
	52	case TEGRA_SOC_T25:
	53	core = VDD_CORE_NOMINAL_T25;
	54	cpu = VDD_CPU_NOMINAL_T25;
	55	break;
	56	default:
	57	debug("%s: Unknown chip type\n", __func__);
	58	return -1;
	59	}
	60
	61	bus = tegra_i2c_get_dvc_bus_num();
	62	if (bus == -1) {
	63	debug("%s: Cannot find DVC I2C bus\n", __func__);
	64	return -1;
	65	}
	66	tps6586x_init(bus);
	67	tps6586x_set_pwm_mode(TPS6586X_PWM_SM1);
	68	return tps6586x_adjust_sm0_sm1(core, cpu, VDD_TRANSITION_STEP,
	69	VDD_TRANSITION_RATE, VDD_RELATION);
	70	}