| /* |
| * Copyright (C) 2014-2015 Samsung Electronics |
| * Przemyslaw Marczak <p.marczak@samsung.com> |
| * |
| * SPDX-License-Identifier: GPL-2.0+ |
| */ |
| #include <common.h> |
| #include <fdtdec.h> |
| #include <errno.h> |
| #include <dm.h> |
| #include <dm/uclass-internal.h> |
| #include <power/pmic.h> |
| #include <power/regulator.h> |
| |
| DECLARE_GLOBAL_DATA_PTR; |
| |
| int regulator_mode(struct udevice *dev, struct dm_regulator_mode **modep) |
| { |
| struct dm_regulator_uclass_platdata *uc_pdata; |
| |
| *modep = NULL; |
| |
| uc_pdata = dev_get_uclass_platdata(dev); |
| if (!uc_pdata) |
| return -ENXIO; |
| |
| *modep = uc_pdata->mode; |
| return uc_pdata->mode_count; |
| } |
| |
| int regulator_get_value(struct udevice *dev) |
| { |
| const struct dm_regulator_ops *ops = dev_get_driver_ops(dev); |
| |
| if (!ops || !ops->get_value) |
| return -ENOSYS; |
| |
| return ops->get_value(dev); |
| } |
| |
| int regulator_set_value(struct udevice *dev, int uV) |
| { |
| const struct dm_regulator_ops *ops = dev_get_driver_ops(dev); |
| struct dm_regulator_uclass_platdata *uc_pdata; |
| |
| uc_pdata = dev_get_uclass_platdata(dev); |
| if (uc_pdata->min_uV != -ENODATA && uV < uc_pdata->min_uV) |
| return -EINVAL; |
| if (uc_pdata->max_uV != -ENODATA && uV > uc_pdata->max_uV) |
| return -EINVAL; |
| |
| if (!ops || !ops->set_value) |
| return -ENOSYS; |
| |
| return ops->set_value(dev, uV); |
| } |
| |
| /* |
| * To be called with at most caution as there is no check |
| * before setting the actual voltage value. |
| */ |
| int regulator_set_value_force(struct udevice *dev, int uV) |
| { |
| const struct dm_regulator_ops *ops = dev_get_driver_ops(dev); |
| |
| if (!ops || !ops->set_value) |
| return -ENOSYS; |
| |
| return ops->set_value(dev, uV); |
| } |
| |
| int regulator_get_current(struct udevice *dev) |
| { |
| const struct dm_regulator_ops *ops = dev_get_driver_ops(dev); |
| |
| if (!ops || !ops->get_current) |
| return -ENOSYS; |
| |
| return ops->get_current(dev); |
| } |
| |
| int regulator_set_current(struct udevice *dev, int uA) |
| { |
| const struct dm_regulator_ops *ops = dev_get_driver_ops(dev); |
| struct dm_regulator_uclass_platdata *uc_pdata; |
| |
| uc_pdata = dev_get_uclass_platdata(dev); |
| if (uc_pdata->min_uA != -ENODATA && uA < uc_pdata->min_uA) |
| return -EINVAL; |
| if (uc_pdata->max_uA != -ENODATA && uA > uc_pdata->max_uA) |
| return -EINVAL; |
| |
| if (!ops || !ops->set_current) |
| return -ENOSYS; |
| |
| return ops->set_current(dev, uA); |
| } |
| |
| bool regulator_get_enable(struct udevice *dev) |
| { |
| const struct dm_regulator_ops *ops = dev_get_driver_ops(dev); |
| |
| if (!ops || !ops->get_enable) |
| return -ENOSYS; |
| |
| return ops->get_enable(dev); |
| } |
| |
| int regulator_set_enable(struct udevice *dev, bool enable) |
| { |
| const struct dm_regulator_ops *ops = dev_get_driver_ops(dev); |
| |
| if (!ops || !ops->set_enable) |
| return -ENOSYS; |
| |
| return ops->set_enable(dev, enable); |
| } |
| |
| int regulator_get_mode(struct udevice *dev) |
| { |
| const struct dm_regulator_ops *ops = dev_get_driver_ops(dev); |
| |
| if (!ops || !ops->get_mode) |
| return -ENOSYS; |
| |
| return ops->get_mode(dev); |
| } |
| |
| int regulator_set_mode(struct udevice *dev, int mode) |
| { |
| const struct dm_regulator_ops *ops = dev_get_driver_ops(dev); |
| |
| if (!ops || !ops->set_mode) |
| return -ENOSYS; |
| |
| return ops->set_mode(dev, mode); |
| } |
| |
| int regulator_get_by_platname(const char *plat_name, struct udevice **devp) |
| { |
| struct dm_regulator_uclass_platdata *uc_pdata; |
| struct udevice *dev; |
| int ret; |
| |
| *devp = NULL; |
| |
| for (ret = uclass_find_first_device(UCLASS_REGULATOR, &dev); dev; |
| ret = uclass_find_next_device(&dev)) { |
| if (ret) |
| continue; |
| |
| uc_pdata = dev_get_uclass_platdata(dev); |
| if (!uc_pdata || strcmp(plat_name, uc_pdata->name)) |
| continue; |
| |
| return uclass_get_device_tail(dev, 0, devp); |
| } |
| |
| debug("%s: can't find: %s\n", __func__, plat_name); |
| |
| return -ENODEV; |
| } |
| |
| int regulator_get_by_devname(const char *devname, struct udevice **devp) |
| { |
| return uclass_get_device_by_name(UCLASS_REGULATOR, devname, devp); |
| } |
| |
| int device_get_supply_regulator(struct udevice *dev, const char *supply_name, |
| struct udevice **devp) |
| { |
| return uclass_get_device_by_phandle(UCLASS_REGULATOR, dev, |
| supply_name, devp); |
| } |
| |
| int regulator_autoset(struct udevice *dev) |
| { |
| struct dm_regulator_uclass_platdata *uc_pdata; |
| int ret = 0; |
| |
| uc_pdata = dev_get_uclass_platdata(dev); |
| if (!uc_pdata->always_on && !uc_pdata->boot_on) |
| return -EMEDIUMTYPE; |
| |
| if (uc_pdata->flags & REGULATOR_FLAG_AUTOSET_UV) |
| ret = regulator_set_value(dev, uc_pdata->min_uV); |
| if (!ret && (uc_pdata->flags & REGULATOR_FLAG_AUTOSET_UA)) |
| ret = regulator_set_current(dev, uc_pdata->min_uA); |
| |
| if (!ret) |
| ret = regulator_set_enable(dev, true); |
| |
| return ret; |
| } |
| |
| static void regulator_show(struct udevice *dev, int ret) |
| { |
| struct dm_regulator_uclass_platdata *uc_pdata; |
| |
| uc_pdata = dev_get_uclass_platdata(dev); |
| |
| printf("%s@%s: ", dev->name, uc_pdata->name); |
| if (uc_pdata->flags & REGULATOR_FLAG_AUTOSET_UV) |
| printf("set %d uV", uc_pdata->min_uV); |
| if (uc_pdata->flags & REGULATOR_FLAG_AUTOSET_UA) |
| printf("; set %d uA", uc_pdata->min_uA); |
| printf("; enabling"); |
| if (ret) |
| printf(" (ret: %d)", ret); |
| printf("\n"); |
| } |
| |
| int regulator_autoset_by_name(const char *platname, struct udevice **devp) |
| { |
| struct udevice *dev; |
| int ret; |
| |
| ret = regulator_get_by_platname(platname, &dev); |
| if (devp) |
| *devp = dev; |
| if (ret) { |
| debug("Can get the regulator: %s!", platname); |
| return ret; |
| } |
| |
| return regulator_autoset(dev); |
| } |
| |
| int regulator_list_autoset(const char *list_platname[], |
| struct udevice *list_devp[], |
| bool verbose) |
| { |
| struct udevice *dev; |
| int error = 0, i = 0, ret; |
| |
| while (list_platname[i]) { |
| ret = regulator_autoset_by_name(list_platname[i], &dev); |
| if (ret != -EMEDIUMTYPE && verbose) |
| regulator_show(dev, ret); |
| if (ret & !error) |
| error = ret; |
| |
| if (list_devp) |
| list_devp[i] = dev; |
| |
| i++; |
| } |
| |
| return error; |
| } |
| |
| static bool regulator_name_is_unique(struct udevice *check_dev, |
| const char *check_name) |
| { |
| struct dm_regulator_uclass_platdata *uc_pdata; |
| struct udevice *dev; |
| int check_len = strlen(check_name); |
| int ret; |
| int len; |
| |
| for (ret = uclass_find_first_device(UCLASS_REGULATOR, &dev); dev; |
| ret = uclass_find_next_device(&dev)) { |
| if (ret || dev == check_dev) |
| continue; |
| |
| uc_pdata = dev_get_uclass_platdata(dev); |
| len = strlen(uc_pdata->name); |
| if (len != check_len) |
| continue; |
| |
| if (!strcmp(uc_pdata->name, check_name)) |
| return false; |
| } |
| |
| return true; |
| } |
| |
| static int regulator_post_bind(struct udevice *dev) |
| { |
| struct dm_regulator_uclass_platdata *uc_pdata; |
| int offset = dev->of_offset; |
| const void *blob = gd->fdt_blob; |
| const char *property = "regulator-name"; |
| |
| uc_pdata = dev_get_uclass_platdata(dev); |
| if (!uc_pdata) |
| return -ENXIO; |
| |
| /* Regulator's mandatory constraint */ |
| uc_pdata->name = fdt_getprop(blob, offset, property, NULL); |
| if (!uc_pdata->name) { |
| debug("%s: dev: %s has no property 'regulator-name'\n", |
| __func__, dev->name); |
| uc_pdata->name = fdt_get_name(blob, offset, NULL); |
| if (!uc_pdata->name) |
| return -EINVAL; |
| } |
| |
| if (regulator_name_is_unique(dev, uc_pdata->name)) |
| return 0; |
| |
| debug("\"%s\" of dev: \"%s\", has nonunique value: \"%s\"", |
| property, dev->name, uc_pdata->name); |
| |
| return -EINVAL; |
| } |
| |
| static int regulator_pre_probe(struct udevice *dev) |
| { |
| struct dm_regulator_uclass_platdata *uc_pdata; |
| int offset = dev->of_offset; |
| |
| uc_pdata = dev_get_uclass_platdata(dev); |
| if (!uc_pdata) |
| return -ENXIO; |
| |
| /* Regulator's optional constraints */ |
| uc_pdata->min_uV = fdtdec_get_int(gd->fdt_blob, offset, |
| "regulator-min-microvolt", -ENODATA); |
| uc_pdata->max_uV = fdtdec_get_int(gd->fdt_blob, offset, |
| "regulator-max-microvolt", -ENODATA); |
| uc_pdata->min_uA = fdtdec_get_int(gd->fdt_blob, offset, |
| "regulator-min-microamp", -ENODATA); |
| uc_pdata->max_uA = fdtdec_get_int(gd->fdt_blob, offset, |
| "regulator-max-microamp", -ENODATA); |
| uc_pdata->always_on = fdtdec_get_bool(gd->fdt_blob, offset, |
| "regulator-always-on"); |
| uc_pdata->boot_on = fdtdec_get_bool(gd->fdt_blob, offset, |
| "regulator-boot-on"); |
| |
| /* Those values are optional (-ENODATA if unset) */ |
| if ((uc_pdata->min_uV != -ENODATA) && |
| (uc_pdata->max_uV != -ENODATA) && |
| (uc_pdata->min_uV == uc_pdata->max_uV)) |
| uc_pdata->flags |= REGULATOR_FLAG_AUTOSET_UV; |
| |
| /* Those values are optional (-ENODATA if unset) */ |
| if ((uc_pdata->min_uA != -ENODATA) && |
| (uc_pdata->max_uA != -ENODATA) && |
| (uc_pdata->min_uA == uc_pdata->max_uA)) |
| uc_pdata->flags |= REGULATOR_FLAG_AUTOSET_UA; |
| |
| return 0; |
| } |
| |
| int regulators_enable_boot_on(bool verbose) |
| { |
| struct udevice *dev; |
| struct uclass *uc; |
| int ret; |
| |
| ret = uclass_get(UCLASS_REGULATOR, &uc); |
| if (ret) |
| return ret; |
| for (uclass_first_device(UCLASS_REGULATOR, &dev); |
| dev; |
| uclass_next_device(&dev)) { |
| ret = regulator_autoset(dev); |
| if (ret == -EMEDIUMTYPE) { |
| ret = 0; |
| continue; |
| } |
| if (verbose) |
| regulator_show(dev, ret); |
| if (ret == -ENOSYS) |
| ret = 0; |
| } |
| |
| return ret; |
| } |
| |
| UCLASS_DRIVER(regulator) = { |
| .id = UCLASS_REGULATOR, |
| .name = "regulator", |
| .post_bind = regulator_post_bind, |
| .pre_probe = regulator_pre_probe, |
| .per_device_platdata_auto_alloc_size = |
| sizeof(struct dm_regulator_uclass_platdata), |
| }; |