1 // SPDX-License-Identifier: GPL-2.0+
3 * (C) Copyright 2016 Texas Instruments Incorporated, <www.ti.com>
4 * Jean-Jacques Hiblot <jjhiblot@ti.com>
10 #include <power/pmic.h>
11 #include <power/regulator.h>
14 #include <linux/bitops.h>
15 #include <linux/ioport.h>
18 struct pbias_reg_info {
23 unsigned int enable_time;
28 struct regmap *regmap;
32 static const struct pmic_child_info pmic_children_info[] = {
33 { .prefix = "pbias", .driver = "pbias_regulator"},
37 static int pbias_write(struct udevice *dev, uint reg, const uint8_t *buff,
40 struct pbias_priv *priv = dev_get_priv(dev);
41 u32 val = *(u32 *)buff;
46 return regmap_write(priv->regmap, priv->offset, val);
49 static int pbias_read(struct udevice *dev, uint reg, uint8_t *buff, int len)
51 struct pbias_priv *priv = dev_get_priv(dev);
56 return regmap_read(priv->regmap, priv->offset, (u32 *)buff);
59 static int pbias_ofdata_to_platdata(struct udevice *dev)
61 struct pbias_priv *priv = dev_get_priv(dev);
62 struct udevice *syscon;
63 struct regmap *regmap;
67 err = uclass_get_device_by_phandle(UCLASS_SYSCON, dev,
70 pr_err("%s: unable to find syscon device (%d)\n", __func__,
75 regmap = syscon_get_regmap(syscon);
77 pr_err("%s: unable to find regmap (%ld)\n", __func__,
79 return PTR_ERR(regmap);
81 priv->regmap = regmap;
83 err = dev_read_resource(dev, 0, &res);
85 pr_err("%s: unable to find offset (%d)\n", __func__, err);
88 priv->offset = res.start;
93 static int pbias_bind(struct udevice *dev)
97 children = pmic_bind_children(dev, dev->node, pmic_children_info);
99 debug("%s: %s - no child found\n", __func__, dev->name);
104 static struct dm_pmic_ops pbias_ops = {
106 .write = pbias_write,
109 static const struct udevice_id pbias_ids[] = {
110 { .compatible = "ti,pbias-dra7" },
114 U_BOOT_DRIVER(pbias_pmic) = {
115 .name = "pbias_pmic",
117 .of_match = pbias_ids,
120 .ofdata_to_platdata = pbias_ofdata_to_platdata,
121 .priv_auto_alloc_size = sizeof(struct pbias_priv),
124 static const struct pbias_reg_info pbias_mmc_omap2430 = {
126 .enable_mask = BIT(1),
130 .name = "pbias_mmc_omap2430"
133 static const struct pbias_reg_info pbias_sim_omap3 = {
135 .enable_mask = BIT(9),
138 .name = "pbias_sim_omap3"
141 static const struct pbias_reg_info pbias_mmc_omap4 = {
142 .enable = BIT(26) | BIT(22),
143 .enable_mask = BIT(26) | BIT(25) | BIT(22),
144 .disable_val = BIT(25),
147 .name = "pbias_mmc_omap4"
150 static const struct pbias_reg_info pbias_mmc_omap5 = {
151 .enable = BIT(27) | BIT(26),
152 .enable_mask = BIT(27) | BIT(25) | BIT(26),
153 .disable_val = BIT(25),
156 .name = "pbias_mmc_omap5"
159 static const struct pbias_reg_info *pbias_reg_infos[] = {
167 static int pbias_regulator_probe(struct udevice *dev)
169 const struct pbias_reg_info **p = pbias_reg_infos;
170 struct dm_regulator_uclass_platdata *uc_pdata;
172 uc_pdata = dev_get_uclass_platdata(dev);
177 rc = dev_read_stringlist_search(dev, "regulator-name",
180 debug("found regulator %s\n", (*p)->name);
182 } else if (rc != -ENODATA) {
192 while (dev_read_string_index(dev, "regulator-name", i++, &s) >= 0)
193 debug("%s'%s' ", (i > 1) ? ", " : "", s);
194 debug("%s not supported\n", (i > 2) ? "are" : "is");
198 uc_pdata->type = REGULATOR_TYPE_OTHER;
199 dev->priv = (void *)*p;
204 static int pbias_regulator_get_value(struct udevice *dev)
206 const struct pbias_reg_info *p = dev_get_priv(dev);
210 rc = pmic_read(dev->parent, 0, (uint8_t *)®, sizeof(reg));
214 debug("%s voltage id %s\n", p->name,
215 (reg & p->vmode) ? "3.0v" : "1.8v");
216 return (reg & p->vmode) ? 3000000 : 1800000;
219 static int pbias_regulator_set_value(struct udevice *dev, int uV)
221 const struct pbias_reg_info *p = dev_get_priv(dev);
225 rc = pmic_read(dev->parent, 0, (uint8_t *)®, sizeof(reg));
231 else if (uV == 1800000)
236 debug("Setting %s voltage to %s\n", p->name,
237 (reg & p->vmode) ? "3.0v" : "1.8v");
239 return pmic_write(dev->parent, 0, (uint8_t *)®, sizeof(reg));
242 static int pbias_regulator_get_enable(struct udevice *dev)
244 const struct pbias_reg_info *p = dev_get_priv(dev);
248 rc = pmic_read(dev->parent, 0, (uint8_t *)®, sizeof(reg));
252 debug("%s id %s\n", p->name,
253 (reg & p->enable_mask) == (p->disable_val) ? "on" : "off");
255 return (reg & p->enable_mask) == (p->disable_val);
258 static int pbias_regulator_set_enable(struct udevice *dev, bool enable)
260 const struct pbias_reg_info *p = dev_get_priv(dev);
264 debug("Turning %s %s\n", enable ? "on" : "off", p->name);
266 rc = pmic_read(dev->parent, 0, (uint8_t *)®, sizeof(reg));
270 reg &= ~p->enable_mask;
274 reg |= p->disable_val;
276 rc = pmic_write(dev->parent, 0, (uint8_t *)®, sizeof(reg));
281 udelay(p->enable_time);
286 static const struct dm_regulator_ops pbias_regulator_ops = {
287 .get_value = pbias_regulator_get_value,
288 .set_value = pbias_regulator_set_value,
289 .get_enable = pbias_regulator_get_enable,
290 .set_enable = pbias_regulator_set_enable,
293 U_BOOT_DRIVER(pbias_regulator) = {
294 .name = "pbias_regulator",
295 .id = UCLASS_REGULATOR,
296 .ops = &pbias_regulator_ops,
297 .probe = pbias_regulator_probe,