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