[PATCH V2] regulator: DA9211 : support device tree
From: James Ban
Date: Wed Aug 27 2014 - 00:32:56 EST
This is a patch for supporting device tree of DA9211/DA9213.
Signed-off-by: James Ban <james.ban.opensource@xxxxxxxxxxx>
---
This patch is relative to linux-next repository tag next-20140826.
Changes in V2:
- defined what the valid regulators for the device and
where their configuration should be specified in the device tree.
.../devicetree/bindings/regulator/da9211.txt | 63 +++++++++++++++
drivers/regulator/da9211-regulator.c | 85 ++++++++++++++++++--
include/linux/regulator/da9211.h | 2 +-
3 files changed, 142 insertions(+), 8 deletions(-)
create mode 100644 Documentation/devicetree/bindings/regulator/da9211.txt
diff --git a/Documentation/devicetree/bindings/regulator/da9211.txt b/Documentation/devicetree/bindings/regulator/da9211.txt
new file mode 100644
index 0000000..240019a
--- /dev/null
+++ b/Documentation/devicetree/bindings/regulator/da9211.txt
@@ -0,0 +1,63 @@
+* Dialog Semiconductor DA9211/DA9213 Voltage Regulator
+
+Required properties:
+- compatible: "dlg,da9211" or "dlg,da9213".
+- reg: I2C slave address, usually 0x68.
+- interrupts: the interrupt outputs of the controller
+- regulators: A node that houses a sub-node for each regulator within the
+ device. Each sub-node is identified using the node's name, with valid
+ values listed below. The content of each sub-node is defined by the
+ standard binding for regulators; see regulator.txt.
+ BUCKA and BUCKB.
+
+Optional properties:
+- Any optional property defined in regulator.txt
+
+Example 1) DA9211
+
+ pmic: da9211@68 {
+ compatible = "dlg,da9211";
+ reg = <0x68>;
+ interrupts = <3 27>;
+
+ regulators {
+ BUCKA {
+ regulator-name = "VBUCKA";
+ regulator-min-microvolt = < 300000>;
+ regulator-max-microvolt = <1570000>;
+ regulator-min-microamp = <2000000>;
+ regulator-max-microamp = <5000000>;
+ };
+ BUCKB {
+ regulator-name = "VBUCKB";
+ regulator-min-microvolt = < 300000>;
+ regulator-max-microvolt = <1570000>;
+ regulator-min-microamp = <2000000>;
+ regulator-max-microamp = <5000000>;
+ };
+ };
+ };
+
+Example 2) DA92113
+ pmic: da9213@68 {
+ compatible = "dlg,da9213";
+ reg = <0x68>;
+ interrupts = <3 27>;
+
+ regulators {
+ BUCKA {
+ regulator-name = "VBUCKA";
+ regulator-min-microvolt = < 300000>;
+ regulator-max-microvolt = <1570000>;
+ regulator-min-microamp = <3000000>;
+ regulator-max-microamp = <6000000>;
+ };
+ BUCKB {
+ regulator-name = "VBUCKB";
+ regulator-min-microvolt = < 300000>;
+ regulator-max-microvolt = <1570000>;
+ regulator-min-microamp = <3000000>;
+ regulator-max-microamp = <6000000>;
+ };
+ };
+ };
diff --git a/drivers/regulator/da9211-regulator.c b/drivers/regulator/da9211-regulator.c
index a26f1d2..5aabbac 100644
--- a/drivers/regulator/da9211-regulator.c
+++ b/drivers/regulator/da9211-regulator.c
@@ -24,6 +24,7 @@
#include <linux/regmap.h>
#include <linux/irq.h>
#include <linux/interrupt.h>
+#include <linux/regulator/of_regulator.h>
#include <linux/regulator/da9211.h>
#include "da9211-regulator.h"
@@ -236,6 +237,59 @@ static struct regulator_desc da9211_regulators[] = {
DA9211_BUCK(BUCKB),
};
+#ifdef CONFIG_OF
+static struct of_regulator_match da9211_matches[] = {
+ [DA9211_ID_BUCKA] = { .name = "BUCKA" },
+ [DA9211_ID_BUCKB] = { .name = "BUCKB" },
+ };
+
+static struct da9211_pdata *da9211_parse_regulators_dt(
+ struct device *dev)
+{
+ struct da9211_pdata *pdata;
+ struct device_node *node;
+ int i, num, n;
+
+ node = of_get_child_by_name(dev->of_node, "regulators");
+ if (!node) {
+ dev_err(dev, "regulators node not found\n");
+ return ERR_PTR(-ENODEV);
+ }
+
+ num = of_regulator_match(dev, node, da9211_matches,
+ ARRAY_SIZE(da9211_matches));
+ of_node_put(node);
+ if (num < 0) {
+ dev_err(dev, "Failed to match regulators\n");
+ return ERR_PTR(-EINVAL);
+ }
+
+ pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
+ if (!pdata)
+ return ERR_PTR(-ENOMEM);
+
+ pdata->num_buck = num;
+
+ n = 0;
+ for (i = 0; i < ARRAY_SIZE(da9211_matches); i++) {
+ if (!da9211_matches[i].init_data)
+ continue;
+
+ pdata->init_data[n] = da9211_matches[i].init_data;
+
+ n++;
+ };
+
+ return pdata;
+}
+#else
+static struct da9211_pdata *da9211_parse_regulators_dt(
+ struct device *dev)
+{
+ return ERR_PTR(-ENODEV);
+}
+#endif
+
static irqreturn_t da9211_irq_handler(int irq, void *data)
{
struct da9211 *chip = data;
@@ -306,7 +360,7 @@ static int da9211_regulator_init(struct da9211 *chip)
}
for (i = 0; i < chip->num_regulator; i++) {
- config.init_data = &(chip->pdata->init_data[i]);
+ config.init_data = chip->pdata->init_data[i];
config.dev = chip->dev;
config.driver_data = chip;
config.regmap = chip->regmap;
@@ -332,6 +386,21 @@ static int da9211_regulator_init(struct da9211 *chip)
return 0;
}
+
+static const struct i2c_device_id da9211_i2c_id[] = {
+ {"da9211", DA9211},
+ {"da9213", DA9213},
+ {},
+};
+
+#ifdef CONFIG_OF
+static const struct of_device_id da9211_dt_ids[] = {
+ { .compatible = "dlg,da9211", .data = &da9211_i2c_id[0] },
+ { .compatible = "dlg,da9213", .data = &da9211_i2c_id[1] },
+ {},
+};
+#endif
+
/*
* I2C driver interface functions
*/
@@ -377,6 +446,14 @@ static int da9211_i2c_probe(struct i2c_client *i2c,
return -ENODEV;
}
+ if (!chip->pdata)
+ chip->pdata = da9211_parse_regulators_dt(chip->dev);
+
+ if (IS_ERR(chip->pdata)) {
+ dev_err(chip->dev, "No regulators defined for the platform\n");
+ return PTR_ERR(chip->pdata);
+ }
+
chip->chip_irq = i2c->irq;
if (chip->chip_irq != 0) {
@@ -401,12 +478,6 @@ static int da9211_i2c_probe(struct i2c_client *i2c,
return ret;
}
-static const struct i2c_device_id da9211_i2c_id[] = {
- {"da9211", DA9211},
- {"da9213", DA9213},
- {},
-};
-
MODULE_DEVICE_TABLE(i2c, da9211_i2c_id);
static struct i2c_driver da9211_regulator_driver = {
diff --git a/include/linux/regulator/da9211.h b/include/linux/regulator/da9211.h
index 658c3c3..5479394 100644
--- a/include/linux/regulator/da9211.h
+++ b/include/linux/regulator/da9211.h
@@ -32,6 +32,6 @@ struct da9211_pdata {
* 2 : 2 phase 2 buck
*/
int num_buck;
- struct regulator_init_data *init_data;
+ struct regulator_init_data *init_data[DA9211_MAX_REGULATORS];
};
#endif
--
end-of-patch for regulator: DA9211 : support device tree V2
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