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/*
* Copyright (C) 2012 Freescale Semiconductor, Inc. All Rights Reserved.
*
* 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.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <asm/arch/mx6.h>
#include <asm/arch/regs-anadig.h>
#include <asm/regulator.h>
#include <asm/errno.h>
#include <asm/io.h>
#include <common.h>
static int get_voltage(struct anatop_regulator_data *rdata)
{
int uv;
if (rdata->control_reg) {
u32 val = (readl(rdata->control_reg) >>
rdata->vol_bit_shift) & rdata->vol_bit_mask;
uv = rdata->min_voltage + (val - rdata->min_bit_val) * 25000;
#ifdef DEBUG
printf("vddio = %d, val=%u\n", uv, val);
#endif
return uv;
} else {
printf("Regulator not supported.\n");
return -EOPNOTSUPP;
}
}
static int set_voltage(struct anatop_regulator_data *rdata, int uv)
{
u32 val, reg;
#ifdef DEBUG
printf("%s: uv %d, min %d, max %d\n", __func__,
uv, rdata->min_voltage, rdata->max_voltage);
#endif
if (uv < rdata->min_voltage || uv > rdata->max_voltage) {
printf("Voltage not supported!\n");
return -EINVAL;
}
if (rdata->control_reg) {
val = rdata->min_bit_val +
(uv - rdata->min_voltage) / 25000;
reg = (readl(rdata->control_reg) &
~(rdata->vol_bit_mask <<
rdata->vol_bit_shift));
#ifdef DEBUG
printf("%s: calculated val %d\n", __func__, val);
#endif
writel((val << rdata->vol_bit_shift) | reg,
rdata->control_reg);
return 0;
} else {
printf("Regulator not supported!\n");
return -EOPNOTSUPP;
}
}
static int enable(struct anatop_regulator_data *sreg)
{
return 0;
}
static int disable(struct anatop_regulator_data *sreg)
{
return 0;
}
static int is_enabled(struct anatop_regulator_data *sreg)
{
return 1;
}
#if defined(CONFIG_MX6Q) || defined(CONFIG_MX6DL)
static struct anatop_regulator_data vdd_data_set[] = {
{
.name = "vddpu",
.set_voltage = set_voltage,
.get_voltage = get_voltage,
.enable = enable,
.disable = disable,
.is_enabled = is_enabled,
.control_reg = (u32)(ANATOP_BASE_ADDR + HW_ANADIG_REG_CORE),
.vol_bit_shift = 9,
.vol_bit_mask = 0x1F,
.min_bit_val = 1,
.min_voltage = 725000,
.max_voltage = 1300000,
},
{
.name = "vddcore",
.set_voltage = set_voltage,
.get_voltage = get_voltage,
.enable = enable,
.disable = disable,
.is_enabled = is_enabled,
.control_reg = (u32)(ANATOP_BASE_ADDR + HW_ANADIG_REG_CORE),
.vol_bit_shift = 0,
.vol_bit_mask = 0x1F,
.min_bit_val = 1,
.min_voltage = 725000,
.max_voltage = 1300000,
},
{
.name = "vddsoc",
.set_voltage = set_voltage,
.get_voltage = get_voltage,
.enable = enable,
.disable = disable,
.is_enabled = is_enabled,
.control_reg = (u32)(ANATOP_BASE_ADDR + HW_ANADIG_REG_CORE),
.vol_bit_shift = 18,
.vol_bit_mask = 0x1F,
.min_bit_val = 1,
.min_voltage = 725000,
.max_voltage = 1300000,
},
{
.name = "vdd2p5",
.set_voltage = set_voltage,
.get_voltage = get_voltage,
.enable = enable,
.disable = disable,
.is_enabled = is_enabled,
.control_reg = (u32)(ANATOP_BASE_ADDR + HW_ANADIG_REG_2P5),
.vol_bit_shift = 8,
.vol_bit_mask = 0x1F,
.min_bit_val = 0,
.min_voltage = 2000000,
.max_voltage = 2775000,
},
{
.name = "vdd1p1",
.set_voltage = set_voltage,
.get_voltage = get_voltage,
.enable = enable,
.disable = disable,
.is_enabled = is_enabled,
.control_reg = (u32)(ANATOP_BASE_ADDR + HW_ANADIG_REG_1P1),
.vol_bit_shift = 8,
.vol_bit_mask = 0x1F,
.min_bit_val = 4,
.min_voltage = 800000,
.max_voltage = 1400000,
},
{
.name = "vdd3p0",
.set_voltage = set_voltage,
.get_voltage = get_voltage,
.enable = enable,
.disable = disable,
.is_enabled = is_enabled,
.control_reg = (u32)(ANATOP_BASE_ADDR + HW_ANADIG_REG_3P0),
.vol_bit_shift = 8,
.vol_bit_mask = 0x1F,
.min_bit_val = 7,
.min_voltage = 2800000,
.max_voltage = 3150000,
},
};
#endif
int regul_list(int show_val)
{
int i = 0;
for (i = 0; i < ARRAY_SIZE(vdd_data_set); ++i) {
if (show_val) {
int uv = 0;
uv = vdd_data_set[i].get_voltage(&vdd_data_set[i]);
printf("%s\t\t%d\n", vdd_data_set[i].name, uv);
} else
printf("%s\n", vdd_data_set[i].name);
}
return 0;
}
int regul_set(char *vdd_name, int uv)
{
int i = 0;
struct anatop_regulator_data *vdd_data;
for (i = 0; i < ARRAY_SIZE(vdd_data_set); ++i) {
if (!strcmp(vdd_name, vdd_data_set[i].name)) {
vdd_data = &vdd_data_set[i];
break;
}
}
if (i == ARRAY_SIZE(vdd_data_set)) {
printf("No regulator as %s!\n", vdd_name);
return -1;
}
return vdd_data->set_voltage(vdd_data, uv);
}
int regul_get(char *vdd_name)
{
int i = 0;
struct anatop_regulator_data *vdd_data;
for (i = 0; i < ARRAY_SIZE(vdd_data_set); ++i) {
if (!strcmp(vdd_name, vdd_data_set[i].name)) {
vdd_data = &vdd_data_set[i];
break;
}
}
if (i == ARRAY_SIZE(vdd_data_set)) {
printf("No regulator as %s!\n", vdd_name);
return -1;
}
return vdd_data->get_voltage(vdd_data);
}
int regul_set_core(int uv)
{
#ifdef CONFIG_CORE_REGULATOR_NAME
return regul_set(CONFIG_CORE_REGULATOR_NAME, uv);
#else
printf("error: CONFIG_CORE_REGULATOR_NAME not set!\n");
return -1;
#endif
}
int regul_get_core(void)
{
#ifdef CONFIG_CORE_REGULATOR_NAME
return regul_get(CONFIG_CORE_REGULATOR_NAME);
#else
printf("error: CONFIG_CORE_REGULATOR_NAME not set!\n");
return -1;
#endif
}
int regul_set_periph(int uv)
{
#ifdef CONFIG_PERIPH_REGULATOR_NAME
return regul_set(CONFIG_PERIPH_REGULATOR_NAME, uv);
#else
printf("error: CONFIG_PERIPH_REGULATOR_NAME not set!\n");
return -1;
#endif
}
int regul_get_periph(void)
{
#ifdef CONFIG_PERIPH_REGULATOR_NAME
return regul_get(CONFIG_PERIPH_REGULATOR_NAME);
#else
printf("error: CONFIG_PERIPH_REGULATOR_NAME not set!\n");
return -1;
#endif
}
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