diff options
| -rw-r--r-- | Documentation/devicetree/bindings/mfd/max77686.txt | 59 | ||||
| -rw-r--r-- | drivers/mfd/max77686.c | 45 |
2 files changed, 98 insertions, 6 deletions
diff --git a/Documentation/devicetree/bindings/mfd/max77686.txt b/Documentation/devicetree/bindings/mfd/max77686.txt new file mode 100644 index 000000000000..c6a3469d3436 --- /dev/null +++ b/Documentation/devicetree/bindings/mfd/max77686.txt @@ -0,0 +1,59 @@ +Maxim MAX77686 multi-function device + +MAX77686 is a Mulitifunction device with PMIC, RTC and Charger on chip. It is +interfaced to host controller using i2c interface. PMIC and Charger submodules +are addressed using same i2c slave address whereas RTC submodule uses +different i2c slave address,presently for which we are statically creating i2c +client while probing.This document describes the binding for mfd device and +PMIC submodule. + +Required properties: +- compatible : Must be "maxim,max77686"; +- reg : Specifies the i2c slave address of PMIC block. +- interrupts : This i2c device has an IRQ line connected to the main SoC. +- interrupt-parent : The parent interrupt controller. + +Optional node: +- voltage-regulators : The regulators of max77686 have to be instantiated + under subnode named "voltage-regulators" using the following format. + + regulator_name { + regulator-compatible = LDOn/BUCKn + standard regulator constraints.... + }; + refer Documentation/devicetree/bindings/regulator/regulator.txt + + The regulator-compatible property of regulator should initialized with string +to get matched with their hardware counterparts as follow: + + -LDOn : for LDOs, where n can lie in range 1 to 26. + example: LDO1, LDO2, LDO26. + -BUCKn : for BUCKs, where n can lie in range 1 to 9. + example: BUCK1, BUCK5, BUCK9. + +Example: + + max77686@09 { + compatible = "maxim,max77686"; + interrupt-parent = <&wakeup_eint>; + interrupts = <26 0>; + reg = <0x09>; + + voltage-regulators { + ldo11_reg { + regulator-compatible = "LDO11"; + regulator-name = "vdd_ldo11"; + regulator-min-microvolt = <1900000>; + regulator-max-microvolt = <1900000>; + regulator-always-on; + }; + + buck1_reg { + regulator-compatible = "BUCK1"; + regulator-name = "vdd_mif"; + regulator-min-microvolt = <950000>; + regulator-max-microvolt = <1300000>; + regulator-always-on; + regulator-boot-on; + }; + } diff --git a/drivers/mfd/max77686.c b/drivers/mfd/max77686.c index c66639d681e9..3e31d05906b2 100644 --- a/drivers/mfd/max77686.c +++ b/drivers/mfd/max77686.c @@ -34,6 +34,11 @@ #define I2C_ADDR_RTC (0x0C >> 1) +static struct of_device_id __devinitdata max77686_pmic_dt_match[] = { + {.compatible = "maxim,max77686", .data = 0}, + {}, +}; + static struct mfd_cell max77686_devs[] = { { .name = "max77686-pmic", }, { .name = "max77686-rtc", }, @@ -44,14 +49,46 @@ static struct regmap_config max77686_regmap_config = { .val_bits = 8, }; +#ifdef CONFIG_OF +static struct max77686_platform_data *max77686_i2c_parse_dt_pdata(struct device + *dev) +{ + struct max77686_platform_data *pd; + + pd = devm_kzalloc(dev, sizeof(*pd), GFP_KERNEL); + if (!pd) { + dev_err(dev, "could not allocate memory for pdata\n"); + return NULL; + } + + dev->platform_data = pd; + return pd; +} +#else +static struct max77686_platform_data *max77686_i2c_parse_dt_pdata(struct device + *dev) +{ + return 0; +} +#endif + static int max77686_i2c_probe(struct i2c_client *i2c, const struct i2c_device_id *id) { - struct max77686_dev *max77686; + struct max77686_dev *max77686 = NULL; struct max77686_platform_data *pdata = i2c->dev.platform_data; unsigned int data; int ret = 0; + if (i2c->dev.of_node) + pdata = max77686_i2c_parse_dt_pdata(&i2c->dev); + + if (!pdata) { + ret = -EIO; + dev_err(&i2c->dev, "No platform data found.\n"); + goto err; + } + max77686 = kzalloc(sizeof(struct max77686_dev), GFP_KERNEL); if (max77686 == NULL) return -ENOMEM; @@ -70,11 +107,6 @@ static int max77686_i2c_probe(struct i2c_client *i2c, max77686->i2c = i2c; max77686->type = id->driver_data; - if (!pdata) { - ret = -EIO; - goto err; - } - max77686->wakeup = pdata->wakeup; max77686->irq_gpio = pdata->irq_gpio; max77686->irq = i2c->irq; @@ -130,6 +162,7 @@ static struct i2c_driver max77686_i2c_driver = { .driver = { .name = "max77686", .owner = THIS_MODULE, + .of_match_table = of_match_ptr(max77686_pmic_dt_match), }, .probe = max77686_i2c_probe, .remove = max77686_i2c_remove, |