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