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authorDaniel Mack <zonque@gmail.com>2013-08-02 14:59:44 +0400
committerMark Brown <broonie@linaro.org>2013-08-02 20:29:54 +0400
commitabe4c51afda02423c81da6f1eaaa50b733f1ecc2 (patch)
treed4c2e2303ab360ac7773caca54ce9d36884ab176 /drivers/regulator/max8660.c
parentde492e8de8d05f29cc496871d42763d0a8a74610 (diff)
downloadlinux-abe4c51afda02423c81da6f1eaaa50b733f1ecc2.tar.xz
regulators: max8660: add DT bindings
This patch adds devicetree bindings for max8660, along with some documentation. Signed-off-by: Daniel Mack <zonque@gmail.com> Signed-off-by: Mark Brown <broonie@linaro.org>
Diffstat (limited to 'drivers/regulator/max8660.c')
-rw-r--r--drivers/regulator/max8660.c82
1 files changed, 81 insertions, 1 deletions
diff --git a/drivers/regulator/max8660.c b/drivers/regulator/max8660.c
index 74c11aa00c8a..a4f2f1a38342 100644
--- a/drivers/regulator/max8660.c
+++ b/drivers/regulator/max8660.c
@@ -44,6 +44,9 @@
#include <linux/regulator/driver.h>
#include <linux/slab.h>
#include <linux/regulator/max8660.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/regulator/of_regulator.h>
#define MAX8660_DCDC_MIN_UV 725000
#define MAX8660_DCDC_MAX_UV 1800000
@@ -310,6 +313,63 @@ enum {
MAX8661 = 1,
};
+#ifdef CONFIG_OF
+static const struct of_device_id max8660_dt_ids[] = {
+ { .compatible = "maxim,max8660", .data = (void *) MAX8660 },
+ { .compatible = "maxim,max8661", .data = (void *) MAX8661 },
+ { }
+};
+MODULE_DEVICE_TABLE(of, max8660_dt_ids);
+
+static int max8660_pdata_from_dt(struct device *dev,
+ struct device_node **of_node,
+ struct max8660_platform_data *pdata)
+{
+ int matched, i;
+ struct device_node *np;
+ struct max8660_subdev_data *sub;
+ struct of_regulator_match rmatch[ARRAY_SIZE(max8660_reg)];
+
+ np = of_find_node_by_name(dev->of_node, "regulators");
+ if (!np) {
+ dev_err(dev, "missing 'regulators' subnode in DT\n");
+ return -EINVAL;
+ }
+
+ for (i = 0; i < ARRAY_SIZE(rmatch); i++)
+ rmatch[i].name = max8660_reg[i].name;
+
+ matched = of_regulator_match(dev, np, rmatch, ARRAY_SIZE(rmatch));
+ if (matched <= 0)
+ return matched;
+
+ pdata->subdevs = devm_kzalloc(dev, sizeof(struct max8660_subdev_data) *
+ matched, GFP_KERNEL);
+ if (!pdata->subdevs)
+ return -ENOMEM;
+
+ pdata->num_subdevs = matched;
+ sub = pdata->subdevs;
+
+ for (i = 0; i < matched; i++) {
+ sub->id = i;
+ sub->name = rmatch[i].name;
+ sub->platform_data = rmatch[i].init_data;
+ of_node[i] = rmatch[i].of_node;
+ sub++;
+ }
+
+ return 0;
+}
+#else
+static inline int max8660_pdata_from_dt(struct device *dev,
+ struct device_node **of_node,
+ struct max8660_platform_data **pdata)
+{
+ return 0;
+}
+#endif
+
static int max8660_probe(struct i2c_client *client,
const struct i2c_device_id *i2c_id)
{
@@ -319,8 +379,28 @@ static int max8660_probe(struct i2c_client *client,
struct regulator_config config = { };
struct max8660 *max8660;
int boot_on, i, id, ret = -EINVAL;
+ struct device_node *of_node[MAX8660_V_END];
unsigned int type;
+ if (dev->of_node && !pdata) {
+ const struct of_device_id *id;
+ struct max8660_platform_data pdata_of;
+
+ id = of_match_device(of_match_ptr(max8660_dt_ids), dev);
+ if (!id)
+ return -ENODEV;
+
+ ret = max8660_pdata_from_dt(dev, of_node, &pdata_of);
+ if (ret < 0)
+ return ret;
+
+ pdata = &pdata_of;
+ type = (unsigned int) id->data;
+ } else {
+ type = i2c_id->driver_data;
+ memset(of_node, 0, sizeof(of_node));
+ }
+
if (pdata->num_subdevs > MAX8660_V_END) {
dev_err(dev, "Too many regulators found!\n");
return -EINVAL;
@@ -334,7 +414,6 @@ static int max8660_probe(struct i2c_client *client,
max8660->client = client;
rdev = max8660->rdev;
- type = i2c_id->driver_data;
if (pdata->en34_is_high) {
/* Simulate always on */
@@ -407,6 +486,7 @@ static int max8660_probe(struct i2c_client *client,
config.dev = dev;
config.init_data = pdata->subdevs[i].platform_data;
+ config.of_node = of_node[i];
config.driver_data = max8660;
rdev[i] = regulator_register(&max8660_reg[id], &config);