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https://github.com/brain-hackers/u-boot-brain
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caa4daa2ae
We use 'priv' for private data but often use 'platdata' for platform data. We can't really use 'pdata' since that is ambiguous (it could mean private or platform data). Rename some of the latter variables to end with 'plat' for consistency. Signed-off-by: Simon Glass <sjg@chromium.org>
164 lines
3.3 KiB
C
164 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_plat *uc_pdata;
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uc_pdata = dev_get_uclass_plat(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_plat *uc_pdata;
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uc_pdata = dev_get_uclass_plat(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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