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path: root/drivers/regulator/max8952.c
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Diffstat (limited to 'drivers/regulator/max8952.c')
-rw-r--r--drivers/regulator/max8952.c75
1 files changed, 73 insertions, 2 deletions
diff --git a/drivers/regulator/max8952.c b/drivers/regulator/max8952.c
index fc7935a19e3..5259c2fea90 100644
--- a/drivers/regulator/max8952.c
+++ b/drivers/regulator/max8952.c
@@ -28,6 +28,9 @@
#include <linux/regulator/max8952.h>
#include <linux/gpio.h>
#include <linux/io.h>
+#include <linux/of.h>
+#include <linux/of_gpio.h>
+#include <linux/regulator/of_regulator.h>
#include <linux/slab.h>
/* Registers */
@@ -126,6 +129,69 @@ static const struct regulator_desc regulator = {
.owner = THIS_MODULE,
};
+#ifdef CONFIG_OF
+static struct of_device_id max8952_dt_match[] = {
+ { .compatible = "maxim,max8952" },
+ {},
+};
+MODULE_DEVICE_TABLE(of, max8952_dt_match);
+
+static struct max8952_platform_data *max8952_parse_dt(struct device *dev)
+{
+ struct max8952_platform_data *pd;
+ struct device_node *np = dev->of_node;
+ int ret;
+ int i;
+
+ pd = devm_kzalloc(dev, sizeof(*pd), GFP_KERNEL);
+ if (!pd) {
+ dev_err(dev, "Failed to allocate platform data\n");
+ return NULL;
+ }
+
+ pd->gpio_vid0 = of_get_named_gpio(np, "max8952,vid-gpios", 0);
+ pd->gpio_vid1 = of_get_named_gpio(np, "max8952,vid-gpios", 1);
+ pd->gpio_en = of_get_named_gpio(np, "max8952,en-gpio", 0);
+
+ if (of_property_read_u32(np, "max8952,default-mode", &pd->default_mode))
+ dev_warn(dev, "Default mode not specified, assuming 0\n");
+
+ ret = of_property_read_u32_array(np, "max8952,dvs-mode-microvolt",
+ pd->dvs_mode, ARRAY_SIZE(pd->dvs_mode));
+ if (ret) {
+ dev_err(dev, "max8952,dvs-mode-microvolt property not specified");
+ return NULL;
+ }
+
+ for (i = 0; i < ARRAY_SIZE(pd->dvs_mode); ++i) {
+ if (pd->dvs_mode[i] < 770000 || pd->dvs_mode[i] > 1400000) {
+ dev_err(dev, "DVS voltage %d out of range\n", i);
+ return NULL;
+ }
+ pd->dvs_mode[i] = (pd->dvs_mode[i] - 770000) / 10000;
+ }
+
+ if (of_property_read_u32(np, "max8952,sync-freq", &pd->sync_freq))
+ dev_warn(dev, "max8952,sync-freq property not specified, defaulting to 26MHz\n");
+
+ if (of_property_read_u32(np, "max8952,ramp-speed", &pd->ramp_speed))
+ dev_warn(dev, "max8952,ramp-speed property not specified, defaulting to 32mV/us\n");
+
+ pd->reg_data = of_get_regulator_init_data(dev, np);
+ if (!pd->reg_data) {
+ dev_err(dev, "Failed to parse regulator init data\n");
+ return NULL;
+ }
+
+ return pd;
+}
+#else
+static struct max8952_platform_data *max8952_parse_dt(struct device *dev)
+{
+ return NULL;
+}
+#endif
+
static int max8952_pmic_probe(struct i2c_client *client,
const struct i2c_device_id *i2c_id)
{
@@ -136,6 +202,9 @@ static int max8952_pmic_probe(struct i2c_client *client,
int ret = 0, err = 0;
+ if (client->dev.of_node)
+ pdata = max8952_parse_dt(&client->dev);
+
if (!pdata) {
dev_err(&client->dev, "Require the platform data\n");
return -EINVAL;
@@ -154,11 +223,12 @@ static int max8952_pmic_probe(struct i2c_client *client,
max8952->pdata = pdata;
config.dev = max8952->dev;
- config.init_data = &pdata->reg_data;
+ config.init_data = pdata->reg_data;
config.driver_data = max8952;
+ config.of_node = client->dev.of_node;
config.ena_gpio = pdata->gpio_en;
- if (pdata->reg_data.constraints.boot_on)
+ if (pdata->reg_data->constraints.boot_on)
config.ena_gpio_flags |= GPIOF_OUT_INIT_HIGH;
max8952->rdev = regulator_register(&regulator, &config);
@@ -271,6 +341,7 @@ static struct i2c_driver max8952_pmic_driver = {
.remove = max8952_pmic_remove,
.driver = {
.name = "max8952",
+ .of_match_table = of_match_ptr(max8952_dt_match),
},
.id_table = max8952_ids,
};