| // 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 <power/as3722.h> |
| #include <power/pmic.h> |
| #include <power/regulator.h> |
| |
| 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); |
| int ldo = dev->driver_data; |
| int ret; |
| |
| ret = pmic_clrsetbits(pmic, AS3722_LDO_CONTROL, 0, 1 << 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); |
| int ldo = dev->driver_data; |
| int ret; |
| |
| ret = pmic_reg_read(pmic, AS3722_LDO_CONTROL); |
| 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_platdata *uc_pdata; |
| |
| uc_pdata = dev_get_uclass_platdata(dev); |
| |
| uc_pdata->type = REGULATOR_TYPE_BUCK; |
| |
| return 0; |
| } |
| |
| static int as3722_ldo_probe(struct udevice *dev) |
| { |
| struct dm_regulator_uclass_platdata *uc_pdata; |
| |
| uc_pdata = dev_get_uclass_platdata(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, |
| }; |