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https://github.com/brain-hackers/u-boot-brain
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![Tom Rini](/assets/img/avatar_default.png)
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
299 lines
6.3 KiB
C
299 lines
6.3 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* (C) Copyright 2016 Texas Instruments Incorporated, <www.ti.com>
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* Jean-Jacques Hiblot <jjhiblot@ti.com>
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*/
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#include <common.h>
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#include <errno.h>
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#include <dm.h>
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#include <power/pmic.h>
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#include <power/regulator.h>
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#include <regmap.h>
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#include <syscon.h>
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#include <linux/bitops.h>
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#include <linux/ioport.h>
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#include <dm/read.h>
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struct pbias_reg_info {
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u32 enable;
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u32 enable_mask;
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u32 disable_val;
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u32 vmode;
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unsigned int enable_time;
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char *name;
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};
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struct pbias_priv {
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struct regmap *regmap;
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int offset;
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};
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static const struct pmic_child_info pmic_children_info[] = {
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{ .prefix = "pbias", .driver = "pbias_regulator"},
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{ },
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};
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static int pbias_write(struct udevice *dev, uint reg, const uint8_t *buff,
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int len)
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{
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struct pbias_priv *priv = dev_get_priv(dev);
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u32 val = *(u32 *)buff;
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if (len != 4)
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return -EINVAL;
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return regmap_write(priv->regmap, priv->offset, val);
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}
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static int pbias_read(struct udevice *dev, uint reg, uint8_t *buff, int len)
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{
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struct pbias_priv *priv = dev_get_priv(dev);
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if (len != 4)
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return -EINVAL;
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return regmap_read(priv->regmap, priv->offset, (u32 *)buff);
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}
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static int pbias_ofdata_to_platdata(struct udevice *dev)
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{
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struct pbias_priv *priv = dev_get_priv(dev);
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struct udevice *syscon;
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struct regmap *regmap;
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struct resource res;
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int err;
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err = uclass_get_device_by_phandle(UCLASS_SYSCON, dev,
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"syscon", &syscon);
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if (err) {
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pr_err("%s: unable to find syscon device (%d)\n", __func__,
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err);
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return err;
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}
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regmap = syscon_get_regmap(syscon);
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if (IS_ERR(regmap)) {
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pr_err("%s: unable to find regmap (%ld)\n", __func__,
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PTR_ERR(regmap));
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return PTR_ERR(regmap);
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}
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priv->regmap = regmap;
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err = dev_read_resource(dev, 0, &res);
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if (err) {
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pr_err("%s: unable to find offset (%d)\n", __func__, err);
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return err;
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}
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priv->offset = res.start;
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return 0;
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}
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static int pbias_bind(struct udevice *dev)
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{
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int children;
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children = pmic_bind_children(dev, dev->node, pmic_children_info);
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if (!children)
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debug("%s: %s - no child found\n", __func__, dev->name);
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return 0;
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}
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static struct dm_pmic_ops pbias_ops = {
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.read = pbias_read,
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.write = pbias_write,
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};
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static const struct udevice_id pbias_ids[] = {
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{ .compatible = "ti,pbias-dra7" },
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{ }
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};
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U_BOOT_DRIVER(pbias_pmic) = {
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.name = "pbias_pmic",
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.id = UCLASS_PMIC,
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.of_match = pbias_ids,
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.bind = pbias_bind,
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.ops = &pbias_ops,
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.ofdata_to_platdata = pbias_ofdata_to_platdata,
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.priv_auto_alloc_size = sizeof(struct pbias_priv),
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};
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static const struct pbias_reg_info pbias_mmc_omap2430 = {
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.enable = BIT(1),
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.enable_mask = BIT(1),
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.vmode = BIT(0),
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.disable_val = 0,
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.enable_time = 100,
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.name = "pbias_mmc_omap2430"
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};
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static const struct pbias_reg_info pbias_sim_omap3 = {
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.enable = BIT(9),
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.enable_mask = BIT(9),
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.vmode = BIT(8),
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.enable_time = 100,
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.name = "pbias_sim_omap3"
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};
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static const struct pbias_reg_info pbias_mmc_omap4 = {
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.enable = BIT(26) | BIT(22),
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.enable_mask = BIT(26) | BIT(25) | BIT(22),
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.disable_val = BIT(25),
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.vmode = BIT(21),
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.enable_time = 100,
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.name = "pbias_mmc_omap4"
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};
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static const struct pbias_reg_info pbias_mmc_omap5 = {
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.enable = BIT(27) | BIT(26),
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.enable_mask = BIT(27) | BIT(25) | BIT(26),
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.disable_val = BIT(25),
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.vmode = BIT(21),
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.enable_time = 100,
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.name = "pbias_mmc_omap5"
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};
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static const struct pbias_reg_info *pbias_reg_infos[] = {
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&pbias_mmc_omap5,
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&pbias_mmc_omap4,
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&pbias_sim_omap3,
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&pbias_mmc_omap2430,
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NULL
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};
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static int pbias_regulator_probe(struct udevice *dev)
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{
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const struct pbias_reg_info **p = pbias_reg_infos;
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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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while (*p) {
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int rc;
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rc = dev_read_stringlist_search(dev, "regulator-name",
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(*p)->name);
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if (rc >= 0) {
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debug("found regulator %s\n", (*p)->name);
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break;
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} else if (rc != -ENODATA) {
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return rc;
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}
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p++;
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}
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if (!*p) {
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int i = 0;
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const char *s;
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debug("regulator ");
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while (dev_read_string_index(dev, "regulator-name", i++, &s) >= 0)
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debug("%s'%s' ", (i > 1) ? ", " : "", s);
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debug("%s not supported\n", (i > 2) ? "are" : "is");
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return -EINVAL;
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}
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uc_pdata->type = REGULATOR_TYPE_OTHER;
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dev->priv = (void *)*p;
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return 0;
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}
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static int pbias_regulator_get_value(struct udevice *dev)
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{
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const struct pbias_reg_info *p = dev_get_priv(dev);
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int rc;
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u32 reg;
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rc = pmic_read(dev->parent, 0, (uint8_t *)®, sizeof(reg));
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if (rc)
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return rc;
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debug("%s voltage id %s\n", p->name,
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(reg & p->vmode) ? "3.0v" : "1.8v");
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return (reg & p->vmode) ? 3000000 : 1800000;
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}
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static int pbias_regulator_set_value(struct udevice *dev, int uV)
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{
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const struct pbias_reg_info *p = dev_get_priv(dev);
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int rc;
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u32 reg;
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rc = pmic_read(dev->parent, 0, (uint8_t *)®, sizeof(reg));
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if (rc)
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return rc;
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if (uV == 3000000)
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reg |= p->vmode;
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else if (uV == 1800000)
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reg &= ~p->vmode;
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else
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return -EINVAL;
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debug("Setting %s voltage to %s\n", p->name,
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(reg & p->vmode) ? "3.0v" : "1.8v");
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return pmic_write(dev->parent, 0, (uint8_t *)®, sizeof(reg));
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}
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static int pbias_regulator_get_enable(struct udevice *dev)
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{
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const struct pbias_reg_info *p = dev_get_priv(dev);
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int rc;
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u32 reg;
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rc = pmic_read(dev->parent, 0, (uint8_t *)®, sizeof(reg));
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if (rc)
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return rc;
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debug("%s id %s\n", p->name,
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(reg & p->enable_mask) == (p->disable_val) ? "on" : "off");
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return (reg & p->enable_mask) == (p->disable_val);
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}
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static int pbias_regulator_set_enable(struct udevice *dev, bool enable)
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{
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const struct pbias_reg_info *p = dev_get_priv(dev);
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int rc;
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u32 reg;
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debug("Turning %s %s\n", enable ? "on" : "off", p->name);
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rc = pmic_read(dev->parent, 0, (uint8_t *)®, sizeof(reg));
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if (rc)
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return rc;
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reg &= ~p->enable_mask;
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if (enable)
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reg |= p->enable;
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else
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reg |= p->disable_val;
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rc = pmic_write(dev->parent, 0, (uint8_t *)®, sizeof(reg));
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if (rc)
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return rc;
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if (enable)
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udelay(p->enable_time);
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return 0;
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}
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static const struct dm_regulator_ops pbias_regulator_ops = {
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.get_value = pbias_regulator_get_value,
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.set_value = pbias_regulator_set_value,
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.get_enable = pbias_regulator_get_enable,
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.set_enable = pbias_regulator_set_enable,
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};
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U_BOOT_DRIVER(pbias_regulator) = {
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.name = "pbias_regulator",
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.id = UCLASS_REGULATOR,
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.ops = &pbias_regulator_ops,
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.probe = pbias_regulator_probe,
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};
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