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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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