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Subject[PATCH 2/4] regulator: tps62360: add dt support
Date
Add dt support for the pmu device tps62360 and
Add binding documentation with example.
With this patch driver will support both device-tree and
non-device tree registration.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
---
.../bindings/regulator/tps62360-regulator.txt | 45 ++++++++++++
drivers/regulator/tps62360-regulator.c | 72 +++++++++++++++++++-
2 files changed, 116 insertions(+), 1 deletions(-)
create mode 100644 Documentation/devicetree/bindings/regulator/tps62360-regulator.txt
diff --git a/Documentation/devicetree/bindings/regulator/tps62360-regulator.txt b/Documentation/devicetree/bindings/regulator/tps62360-regulator.txt
new file mode 100644
index 0000000..e337cd6
--- /dev/null
+++ b/Documentation/devicetree/bindings/regulator/tps62360-regulator.txt
@@ -0,0 +1,45 @@
+TPS62360 Voltage regulators
+
+Required properties:
+- compatible: Must be one of the following.
+ "ti,tps62360"
+ "ti,tps62361",
+ "ti,tps62362",
+ "ti,tps62363",
+- reg: I2C slave address
+
+Optional properties:
+- ti,enable-force-pwm: Enable fore PWM mode. This is boolean value.
+- ti,enable-vout-discharge: Enable output discharge. This is boolean value.
+- ti,enable-pull-down: Enable pull down. This is boolean value.
+- ti,vsel0-gpio: GPIO for controlling VSEL0 line.
+ If this property is missing, then assume that there is no GPIO
+ for vsel0 control.
+- ti,vsel1-gpio: Gpio for controlling VSEL1 line.
+ If this property is missing, then assume that there is no GPIO
+ for vsel1 control.
+- ti,vsel0-state-high: Inital state of vsel0 input is high.
+ If this property is missing, then assume the state as low (0).
+- ti,vsel1-state-high: Inital state of vsel1 input is high.
+ If this property is missing, then assume the state as low (0).
+
+Any property defined as part of the core regulator binding, defined in
+regulator.txt, can also be used.
+
+Example:
+
+ abc: tps62360 {
+ compatible = "ti,tps62361";
+ reg = <0x60>;
+ regulator-name = "tps62361-vout";
+ regulator-min-microvolt = <500000>;
+ regulator-max-microvolt = <1500000>;
+ regulator-boot-on
+ ti,vsel0-gpio = <&gpio1 16 0>;
+ ti,vsel1-gpio = <&gpio1 17 0>;
+ ti,vsel0-state-high;
+ ti,vsel1-state-high;
+ ti,enable-pull-down;
+ ti,enable-force-pwm;
+ ti,enable-vout-discharge;
+ };
diff --git a/drivers/regulator/tps62360-regulator.c b/drivers/regulator/tps62360-regulator.c
index 3506900..4fdc8ab 100644
--- a/drivers/regulator/tps62360-regulator.c
+++ b/drivers/regulator/tps62360-regulator.c
@@ -26,6 +26,10 @@
#include <linux/module.h>
#include <linux/init.h>
#include <linux/err.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/of_gpio.h>
+#include <linux/regulator/of_regulator.h>
#include <linux/platform_device.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
@@ -297,6 +301,56 @@ static const struct regmap_config tps62360_regmap_config = {
.cache_type = REGCACHE_RBTREE,
};

+static struct tps62360_regulator_platform_data *
+ of_get_tps62360_platform_data(struct device *dev)
+{
+ struct tps62360_regulator_platform_data *pdata;
+ struct device_node *np = dev->of_node;
+
+ pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
+ if (!pdata) {
+ dev_err(dev, "Memory alloc failed for platform data\n");
+ return NULL;
+ }
+
+ pdata->reg_init_data = of_get_regulator_init_data(dev, dev->of_node);
+ if (!pdata->reg_init_data) {
+ dev_err(dev, "Not able to get OF regulator init data\n");
+ return NULL;
+ }
+
+ pdata->vsel0_gpio = of_get_named_gpio(np, "vsel0-gpio", 0);
+ pdata->vsel1_gpio = of_get_named_gpio(np, "vsel1_gpio", 0);
+
+ if (of_find_property(np, "ti,vsel0-state-high", NULL))
+ pdata->vsel0_def_state = 1;
+
+ if (of_find_property(np, "ti,vsel1-state-high", NULL))
+ pdata->vsel1_def_state = 1;
+
+ if (of_find_property(np, "ti,enable-pull-down", NULL))
+ pdata->en_internal_pulldn = true;
+
+ if (of_find_property(np, "ti,enable-force-pwm", NULL))
+ pdata->en_force_pwm = true;
+
+ if (of_find_property(np, "ti,enable-vout-discharge", NULL))
+ pdata->en_discharge = true;
+
+ return pdata;
+}
+
+#if defined(CONFIG_OF)
+static const struct of_device_id tps62360_of_match[] = {
+ { .compatible = "ti,tps62360", .data = (void *)TPS62360},
+ { .compatible = "ti,tps62361", .data = (void *)TPS62361},
+ { .compatible = "ti,tps62362", .data = (void *)TPS62362},
+ { .compatible = "ti,tps62363", .data = (void *)TPS62363},
+ {},
+}
+MODULE_DEVICE_TABLE(of, tps62360_of_match);
+#endif
+
static int __devinit tps62360_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
@@ -306,8 +360,23 @@ static int __devinit tps62360_probe(struct i2c_client *client,
struct tps62360_chip *tps;
int ret;
int i;
+ int chip_id;

pdata = client->dev.platform_data;
+ chip_id = id->driver_data;
+
+ if (client->dev.of_node) {
+ const struct of_device_id *match;
+ match = of_match_device(tps62360_of_match, &client->dev);
+ if (!match) {
+ dev_err(&client->dev, "Error: No device match found\n");
+ return -ENODEV;
+ }
+ chip_id = (int)match->data;
+ if (!pdata)
+ pdata = of_get_tps62360_platform_data(&client->dev);
+ }
+
if (!pdata) {
dev_err(&client->dev, "%s(): Platform data not found\n",
__func__);
@@ -328,7 +397,7 @@ static int __devinit tps62360_probe(struct i2c_client *client,
tps->vsel1_gpio = pdata->vsel1_gpio;
tps->dev = &client->dev;

- switch (id->driver_data) {
+ switch (chip_id) {
case TPS62360:
case TPS62362:
tps->voltage_base = TPS62360_BASE_VOLTAGE;
@@ -484,6 +553,7 @@ static struct i2c_driver tps62360_i2c_driver = {
.driver = {
.name = "tps62360",
.owner = THIS_MODULE,
+ .of_match_table = of_match_ptr(tps62360_of_match),
},
.probe = tps62360_probe,
.remove = __devexit_p(tps62360_remove),
--
1.7.1.1


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