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arm:am43xx: Add TPS65218 support to scale voltages up

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This family is supported by the TPS65218 PMIC.  Implement a scale_vcores
to set the MPU and CORE voltage correctly to the max frequency that is
supported (and what we will be scaling them to in setup_dplls()).

Signed-off-by: Tom Rini <trini@ti.com>
This commit is contained in:
Tom Rini 2014-06-05 11:15:30 -04:00
parent 86db550b38
commit 83bad1026b
2 changed files with 45 additions and 7 deletions
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48
board/ti/am43xx/board.c
View file

@ -19,6 +19,7 @@
#include <asm/arch/gpio.h>
#include <asm/emif.h>
#include "board.h"
#include <power/tps65218.h>
#include <miiphy.h>
#include <cpsw.h>
@ -254,13 +255,6 @@ void emif_get_ext_phy_ctrl_const_regs(const u32 **regs, u32 *size)
const struct dpll_params *get_dpll_ddr_params(void)
{
struct am43xx_board_id header;
enable_i2c0_pin_mux();
i2c_init(CONFIG_SYS_OMAP24_I2C_SPEED, CONFIG_SYS_OMAP24_I2C_SLAVE);
if (read_eeprom(&header) < 0)
puts("Could not get board ID.\n");
if (board_is_eposevm())
return &epos_evm_dpll_ddr;
else if (board_is_gpevm())
@ -338,6 +332,46 @@ const struct dpll_params *get_dpll_per_params(void)
return &dpll_per[ind];
}
void scale_vcores(void)
{
const struct dpll_params *mpu_params;
int mpu_vdd;
struct am43xx_board_id header;
enable_i2c0_pin_mux();
i2c_init(CONFIG_SYS_OMAP24_I2C_SPEED, CONFIG_SYS_OMAP24_I2C_SLAVE);
if (read_eeprom(&header) < 0)
puts("Could not get board ID.\n");
/* Get the frequency */
mpu_params = get_dpll_mpu_params();
if (i2c_probe(TPS65218_CHIP_PM))
return;
if (mpu_params->m == 1000) {
mpu_vdd = TPS65218_DCDC_VOLT_SEL_1330MV;
} else if (mpu_params->m == 600) {
mpu_vdd = TPS65218_DCDC_VOLT_SEL_1100MV;
} else {
puts("Unknown MPU clock, not scaling\n");
return;
}
/* Set DCDC1 (CORE) voltage to 1.1V */
if (tps65218_voltage_update(TPS65218_DCDC1,
TPS65218_DCDC_VOLT_SEL_1100MV)) {
puts("tps65218_voltage_update failure\n");
return;
}
/* Set DCDC2 (MPU) voltage */
if (tps65218_voltage_update(TPS65218_DCDC2, mpu_vdd)) {
puts("tps65218_voltage_update failure\n");
return;
}
}
void set_uart_mux_conf(void)
{
enable_uart0_pin_mux();

4
include/configs/am43xx_evm.h
View file

@ -32,11 +32,15 @@
#define CONFIG_SYS_I2C_EEPROM_ADDR_LEN 2
#define CONFIG_SYS_I2C_MULTI_EEPROMS
/* Power */
#define CONFIG_POWER_TPS65218
/* SPL defines. */
#define CONFIG_SPL_TEXT_BASE 0x40300350
#define CONFIG_SPL_MAX_SIZE (220 << 10) /* 220KB */
#define CONFIG_SYS_SPL_ARGS_ADDR (CONFIG_SYS_SDRAM_BASE + \
(128 << 20))
#define CONFIG_SPL_POWER_SUPPORT
#define CONFIG_SPL_YMODEM_SUPPORT
/* Enabling L2 Cache */