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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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