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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2017 Google, Inc
* Written by Simon Glass <sjg@chromium.org>
*
* Placeholder regulator driver for as3722.
*/
#include <common.h>
#include <dm.h>
#include <errno.h>
#include <log.h>
#include <power/as3722.h>
#include <power/pmic.h>
#include <power/regulator.h>
#define AS3722_LDO_CONTROL0_MAX_INDEX 7
static int stepdown_get_value(struct udevice *dev)
{
return -ENOSYS;
}
static int stepdown_set_value(struct udevice *dev, int uvolt)
{
return -ENOSYS;
}
static int stepdown_set_enable(struct udevice *dev, bool enable)
{
struct udevice *pmic = dev_get_parent(dev);
int sd = dev->driver_data;
int ret;
ret = pmic_clrsetbits(pmic, AS3722_SD_CONTROL, 0, 1 << sd);
if (ret < 0) {
debug("%s: failed to write SD control register: %d", __func__,
ret);
return ret;
}
return 0;
}
static int stepdown_get_enable(struct udevice *dev)
{
struct udevice *pmic = dev_get_parent(dev);
int sd = dev->driver_data;
int ret;
ret = pmic_reg_read(pmic, AS3722_SD_CONTROL);
if (ret < 0) {
debug("%s: failed to read SD control register: %d", __func__,
ret);
return ret;
}
return ret & (1 << sd) ? true : false;
}
static int ldo_get_value(struct udevice *dev)
{
return -ENOSYS;
}
static int ldo_set_value(struct udevice *dev, int uvolt)
{
return -ENOSYS;
}
static int ldo_set_enable(struct udevice *dev, bool enable)
{
struct udevice *pmic = dev_get_parent(dev);
u8 ctrl_reg = AS3722_LDO_CONTROL0;
int ldo = dev->driver_data;
int ret;
if (ldo > AS3722_LDO_CONTROL0_MAX_INDEX) {
ctrl_reg = AS3722_LDO_CONTROL1;
ldo -= 8;
}
ret = pmic_clrsetbits(pmic, ctrl_reg, !enable << ldo, enable << ldo);
if (ret < 0) {
debug("%s: failed to write LDO control register: %d", __func__,
ret);
return ret;
}
return 0;
}
static int ldo_get_enable(struct udevice *dev)
{
struct udevice *pmic = dev_get_parent(dev);
u8 ctrl_reg = AS3722_LDO_CONTROL0;
int ldo = dev->driver_data;
int ret;
if (ldo > AS3722_LDO_CONTROL0_MAX_INDEX) {
ctrl_reg = AS3722_LDO_CONTROL1;
ldo -= 8;
}
ret = pmic_reg_read(pmic, ctrl_reg);
if (ret < 0) {
debug("%s: failed to read SD control register: %d", __func__,
ret);
return ret;
}
return ret & (1 << ldo) ? true : false;
}
static int as3722_stepdown_probe(struct udevice *dev)
{
struct dm_regulator_uclass_plat *uc_pdata;
uc_pdata = dev_get_uclass_plat(dev);
uc_pdata->type = REGULATOR_TYPE_BUCK;
return 0;
}
static int as3722_ldo_probe(struct udevice *dev)
{
struct dm_regulator_uclass_plat *uc_pdata;
uc_pdata = dev_get_uclass_plat(dev);
uc_pdata->type = REGULATOR_TYPE_LDO;
return 0;
}
static const struct dm_regulator_ops as3722_stepdown_ops = {
.get_value = stepdown_get_value,
.set_value = stepdown_set_value,
.get_enable = stepdown_get_enable,
.set_enable = stepdown_set_enable,
};
static const struct dm_regulator_ops as3722_ldo_ops = {
.get_value = ldo_get_value,
.set_value = ldo_set_value,
.get_enable = ldo_get_enable,
.set_enable = ldo_set_enable,
};
U_BOOT_DRIVER(as3722_stepdown) = {
.name = "as3722_stepdown",
.id = UCLASS_REGULATOR,
.ops = &as3722_stepdown_ops,
.probe = as3722_stepdown_probe,
};
U_BOOT_DRIVER(as3722_ldo) = {
.name = "as3722_ldo",
.id = UCLASS_REGULATOR,
.ops = &as3722_ldo_ops,
.probe = as3722_ldo_probe,
};
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