mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-05 19:10:13 +00:00
dbedf4a56b
Add support for setting nuvoton BMC NPCM845 voltage supply. Signed-off-by: Jim Liu <JJLIU0@nuvoton.com>
132 lines
3 KiB
C
132 lines
3 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Copyright (c) 2022 Nuvoton Technology Corp.
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <dm.h>
|
|
#include <asm/io.h>
|
|
#include <dm/device_compat.h>
|
|
#include <power/regulator.h>
|
|
|
|
#define REG_VSRCR 0xf08000e8 /* Voltage Supply Control Register */
|
|
|
|
/* Supported voltage levels (uV) */
|
|
static const u32 volts_type1[] = { 3300000, 1800000 };
|
|
static const u32 volts_type2[] = { 1000000, 1800000 };
|
|
#define VOLT_LEV0 0
|
|
#define VOLT_LEV1 1
|
|
|
|
struct volt_supply {
|
|
char *name;
|
|
const u32 *volts;
|
|
u32 reg_shift; /* Register bit offset for setting voltage */
|
|
};
|
|
|
|
static const struct volt_supply npcm8xx_volt_supps[] = {
|
|
{"v1", volts_type1, 0},
|
|
{"v2", volts_type1, 1},
|
|
{"v3", volts_type1, 2},
|
|
{"v4", volts_type1, 3},
|
|
{"v5", volts_type1, 4},
|
|
{"v6", volts_type1, 5},
|
|
{"v7", volts_type1, 6},
|
|
{"v8", volts_type1, 7},
|
|
{"v9", volts_type1, 8},
|
|
{"v10", volts_type1, 9},
|
|
{"v11", volts_type2, 10},
|
|
{"v12", volts_type1, 11},
|
|
{"v13", volts_type1, 12},
|
|
{"v14", volts_type2, 13},
|
|
{"vsif", volts_type1, 14},
|
|
{"vr2", volts_type1, 30},
|
|
};
|
|
|
|
static const struct volt_supply *npcm8xx_volt_supply_get(const char *name)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(npcm8xx_volt_supps); i++) {
|
|
if (!strcmp(npcm8xx_volt_supps[i].name, name))
|
|
return &npcm8xx_volt_supps[i];
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static int npcm8xx_regulator_set_value(struct udevice *dev, int uV)
|
|
{
|
|
struct dm_regulator_uclass_plat *uc_pdata;
|
|
const struct volt_supply *supp;
|
|
u32 val, level;
|
|
|
|
uc_pdata = dev_get_uclass_plat(dev);
|
|
if (!uc_pdata)
|
|
return -ENXIO;
|
|
|
|
dev_dbg(dev, "%s set_value: %d\n", uc_pdata->name, uV);
|
|
supp = npcm8xx_volt_supply_get(uc_pdata->name);
|
|
if (!supp)
|
|
return -ENOENT;
|
|
|
|
if (uV == supp->volts[VOLT_LEV0])
|
|
level = VOLT_LEV0;
|
|
else if (uV == supp->volts[VOLT_LEV1])
|
|
level = VOLT_LEV1;
|
|
else
|
|
return -EINVAL;
|
|
|
|
/* Set voltage level */
|
|
val = readl(REG_VSRCR);
|
|
val &= ~BIT(supp->reg_shift);
|
|
val |= level << supp->reg_shift;
|
|
writel(val, REG_VSRCR);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int npcm8xx_regulator_get_value(struct udevice *dev)
|
|
{
|
|
struct dm_regulator_uclass_plat *uc_pdata;
|
|
const struct volt_supply *supp;
|
|
u32 val;
|
|
|
|
uc_pdata = dev_get_uclass_plat(dev);
|
|
if (!uc_pdata)
|
|
return -ENXIO;
|
|
|
|
supp = npcm8xx_volt_supply_get(uc_pdata->name);
|
|
if (!supp)
|
|
return -ENOENT;
|
|
|
|
val = readl(REG_VSRCR) & BIT(supp->reg_shift);
|
|
|
|
dev_dbg(dev, "%s get_value: %d\n", uc_pdata->name,
|
|
val ? supp->volts[VOLT_LEV1] : supp->volts[VOLT_LEV0]);
|
|
|
|
return val ? supp->volts[VOLT_LEV1] : supp->volts[VOLT_LEV0];
|
|
}
|
|
|
|
static int npcm8xx_regulator_set_enable(struct udevice *dev, bool enable)
|
|
{
|
|
/* Always on */
|
|
return 0;
|
|
}
|
|
|
|
static const struct dm_regulator_ops npcm8xx_regulator_ops = {
|
|
.set_value = npcm8xx_regulator_set_value,
|
|
.get_value = npcm8xx_regulator_get_value,
|
|
.set_enable = npcm8xx_regulator_set_enable,
|
|
};
|
|
|
|
static const struct udevice_id npcm8xx_regulator_ids[] = {
|
|
{ .compatible = "regulator-npcm845" },
|
|
{ },
|
|
};
|
|
|
|
U_BOOT_DRIVER(regulator_npcm8xx) = {
|
|
.name = "regulator_npcm845",
|
|
.id = UCLASS_REGULATOR,
|
|
.ops = &npcm8xx_regulator_ops,
|
|
.of_match = npcm8xx_regulator_ids,
|
|
};
|