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pit: set up the PMIC correctly 

This updates the setup_power() function to actually set up the PMIC
which is on this board (the MAX77802).

Change-Id: I9c6f21f183dacc0bca71277e681e670834412d78
Signed-off-by: David Hendricks <dhendrix@chromium.org>
Signed-off-by: Gabe Black <gabeblack@chromium.org>
Reviewed-on: http://review.coreboot.org/3680
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
This commit is contained in:
David Hendricks 2013-06-14 16:08:05 -07:00 committed by Stefan Reinauer
parent 90a42d83cf
commit 1e3e2c51db
2 changed files with 52 additions and 37 deletions
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1
src/mainboard/google/pit/exynos5420.h
View File

@ -19,6 +19,7 @@
/* I2C */
#define I2C_0_SPEED 100000
#define I2C_4_SPEED 100000
#define I2C_SLAVE 0
/* Voltages */

88
src/mainboard/google/pit/romstage.c
View File

@ -1,7 +1,7 @@
/*
* This file is part of the coreboot project.
*
* Copyright (C) 2012 The ChromiumOS Authors. All rights reserved.
* Copyright 2013 Google Inc.
*
* 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
@ -18,6 +18,7 @@
*/
#include <types.h>
#include <stdlib.h>
#include <armv7.h>
#include <cbfs.h>
@ -35,60 +36,73 @@
#include <console/console.h>
#include <arch/stages.h>
#include <drivers/maxim/max77686/max77686.h>
#include <drivers/maxim/max77802/max77802.h>
#include <device/i2c.h>
#include "exynos5420.h"
#define PMIC_BUS 0
#define MMC0_GPIO_PIN (58)
struct pmic_write
{
int or_orig; // Whether to or in the original value.
uint8_t reg; // Register to write.
uint8_t val; // Value to write.
};
/*
* Use read-modify-write for MAX77802 control registers and clobber the
* output voltage setting (BUCK?DVS?) registers.
*/
struct pmic_write pmic_writes[] =
{
{ 1, MAX77802_REG_PMIC_32KHZ, MAX77802_32KHCP_EN },
{ 0, MAX77802_REG_PMIC_BUCK1DVS1, MAX77802_BUCK1DVS1_1V },
{ 1, MAX77802_REG_PMIC_BUCK1CTRL, MAX77802_BUCK_TYPE1_ON |
MAX77802_BUCK_TYPE1_IGNORE_PWRREQ },
{ 0, MAX77802_REG_PMIC_BUCK2DVS1, MAX77802_BUCK2DVS1_1V },
{ 1, MAX77802_REG_PMIC_BUCK2CTRL1, MAX77802_BUCK_TYPE2_ON |
MAX77802_BUCK_TYPE2_IGNORE_PWRREQ },
{ 0, MAX77802_REG_PMIC_BUCK3DVS1, MAX77802_BUCK3DVS1_1V },
{ 1, MAX77802_REG_PMIC_BUCK3CTRL1, MAX77802_BUCK_TYPE2_ON |
MAX77802_BUCK_TYPE2_IGNORE_PWRREQ },
{ 0, MAX77802_REG_PMIC_BUCK4DVS1, MAX77802_BUCK4DVS1_1V },
{ 1, MAX77802_REG_PMIC_BUCK4CTRL1, MAX77802_BUCK_TYPE2_ON |
MAX77802_BUCK_TYPE2_IGNORE_PWRREQ },
{ 0, MAX77802_REG_PMIC_BUCK6DVS1, MAX77802_BUCK6DVS1_1V },
{ 1, MAX77802_REG_PMIC_BUCK6CTRL, MAX77802_BUCK_TYPE1_ON |
MAX77802_BUCK_TYPE1_IGNORE_PWRREQ }
};
static void setup_power(void)
{
int error = 0;
int i;
power_init();
/* Initialize I2C bus to configure PMIC. */
exynos_pinmux_i2c0();
i2c_init(0, I2C_0_SPEED, 0x00);
exynos_pinmux_i2c4();
i2c_init(4, I2C_4_SPEED, 0x00);
printk(BIOS_DEBUG, "%s: Setting up PMIC...\n", __func__);
/*
* We're using CR1616 coin cell battery that is non-rechargeable
* battery. But, BBCHOSTEN bit of the BBAT Charger Register in
* MAX77686 is enabled by default for charging coin cell.
*
* Also, we cannot meet the coin cell reverse current spec. in UL
* standard if BBCHOSTEN bit is enabled.
*
* Disable Coin BATT Charging
*/
error = max77686_disable_backup_batt(PMIC_BUS);
error |= max77686_volsetting(PMIC_BUS, PMIC_BUCK2, VDD_ARM_MV,
REG_ENABLE, MAX77686_MV);
error |= max77686_volsetting(PMIC_BUS, PMIC_BUCK3, VDD_INT_UV,
REG_ENABLE, MAX77686_UV);
error |= max77686_volsetting(PMIC_BUS, PMIC_BUCK1, VDD_MIF_MV,
REG_ENABLE, MAX77686_MV);
error |= max77686_volsetting(PMIC_BUS, PMIC_BUCK4, VDD_G3D_MV,
REG_ENABLE, MAX77686_MV);
error |= max77686_volsetting(PMIC_BUS, PMIC_LDO2, VDD_LDO2_MV,
REG_ENABLE, MAX77686_MV);
error |= max77686_volsetting(PMIC_BUS, PMIC_LDO3, VDD_LDO3_MV,
REG_ENABLE, MAX77686_MV);
error |= max77686_volsetting(PMIC_BUS, PMIC_LDO5, VDD_LDO5_MV,
REG_ENABLE, MAX77686_MV);
error |= max77686_volsetting(PMIC_BUS, PMIC_LDO10, VDD_LDO10_MV,
REG_ENABLE, MAX77686_MV);
for (i = 0; i < ARRAY_SIZE(pmic_writes); i++) {
uint8_t data = 0;
uint8_t reg = pmic_writes[i].reg;
error |= max77686_enable_32khz_cp(PMIC_BUS);
if (error) {
printk(BIOS_CRIT, "%s: PMIC error: %#x\n", __func__, error);
die("Failed to intialize PMIC.\n");
if (pmic_writes[i].or_orig)
error |= i2c_read(4, MAX77802_I2C_ADDR,
reg, sizeof(reg),
&data, sizeof(data));
data |= pmic_writes[i].val;
error |= i2c_write(4, MAX77802_I2C_ADDR,
reg, sizeof(reg),
&data, sizeof(data));
}
if (error)
die("Failed to intialize PMIC.\n");
}
static void setup_storage(void)