diff options
Diffstat (limited to 'drivers/regulator/max8997.c')
| -rw-r--r-- | drivers/regulator/max8997.c | 143 |
1 files changed, 140 insertions, 3 deletions
diff --git a/drivers/regulator/max8997.c b/drivers/regulator/max8997.c index 17a58c56eebf..e898d82f4193 100644 --- a/drivers/regulator/max8997.c +++ b/drivers/regulator/max8997.c @@ -25,6 +25,7 @@ #include <linux/delay.h> #include <linux/err.h> #include <linux/gpio.h> +#include <linux/of_gpio.h> #include <linux/slab.h> #include <linux/module.h> #include <linux/platform_device.h> @@ -32,6 +33,7 @@ #include <linux/regulator/machine.h> #include <linux/mfd/max8997.h> #include <linux/mfd/max8997-private.h> +#include <linux/regulator/of_regulator.h> struct max8997_data { struct device *dev; @@ -953,21 +955,155 @@ static struct regulator_desc regulators[] = { }, }; +#ifdef CONFIG_OF +static int max8997_pmic_dt_parse_dvs_gpio(struct max8997_dev *iodev, + struct max8997_platform_data *pdata, + struct device_node *pmic_np) +{ + int i, gpio; + + for (i = 0; i < 3; i++) { + gpio = of_get_named_gpio(pmic_np, + "max8997,pmic-buck125-dvs-gpios", i); + if (!gpio_is_valid(gpio)) { + dev_err(iodev->dev, "invalid gpio[%d]: %d\n", i, gpio); + return -EINVAL; + } + pdata->buck125_gpios[i] = gpio; + } + return 0; +} + +static int max8997_pmic_dt_parse_pdata(struct max8997_dev *iodev, + struct max8997_platform_data *pdata) +{ + struct device_node *pmic_np, *regulators_np, *reg_np; + struct max8997_regulator_data *rdata; + unsigned int i, dvs_voltage_nr = 1, ret; + + pmic_np = iodev->dev->of_node; + if (!pmic_np) { + dev_err(iodev->dev, "could not find pmic sub-node\n"); + return -ENODEV; + } + + regulators_np = of_find_node_by_name(pmic_np, "regulators"); + if (!regulators_np) { + dev_err(iodev->dev, "could not find regulators sub-node\n"); + return -EINVAL; + } + + /* count the number of regulators to be supported in pmic */ + pdata->num_regulators = 0; + for_each_child_of_node(regulators_np, reg_np) + pdata->num_regulators++; + + rdata = devm_kzalloc(iodev->dev, sizeof(*rdata) * + pdata->num_regulators, GFP_KERNEL); + if (!rdata) { + dev_err(iodev->dev, "could not allocate memory for " + "regulator data\n"); + return -ENOMEM; + } + + pdata->regulators = rdata; + for_each_child_of_node(regulators_np, reg_np) { + for (i = 0; i < ARRAY_SIZE(regulators); i++) + if (!of_node_cmp(reg_np->name, regulators[i].name)) + break; + rdata->id = i; + rdata->initdata = of_get_regulator_init_data( + iodev->dev, reg_np); + rdata->reg_node = reg_np; + rdata++; + } + + if (of_get_property(pmic_np, "max8997,pmic-buck1-uses-gpio-dvs", NULL)) + pdata->buck1_gpiodvs = true; + + if (of_get_property(pmic_np, "max8997,pmic-buck2-uses-gpio-dvs", NULL)) + pdata->buck2_gpiodvs = true; + + if (of_get_property(pmic_np, "max8997,pmic-buck5-uses-gpio-dvs", NULL)) + pdata->buck5_gpiodvs = true; + + if (pdata->buck1_gpiodvs || pdata->buck2_gpiodvs || + pdata->buck5_gpiodvs) { + ret = max8997_pmic_dt_parse_dvs_gpio(iodev, pdata, pmic_np); + if (ret) + return -EINVAL; + + if (of_property_read_u32(pmic_np, + "max8997,pmic-buck125-default-dvs-idx", + &pdata->buck125_default_idx)) { + pdata->buck125_default_idx = 0; + } else { + if (pdata->buck125_default_idx >= 8) { + pdata->buck125_default_idx = 0; + dev_info(iodev->dev, "invalid value for " + "default dvs index, using 0 instead\n"); + } + } + + if (of_get_property(pmic_np, + "max8997,pmic-ignore-gpiodvs-side-effect", NULL)) + pdata->ignore_gpiodvs_side_effect = true; + + dvs_voltage_nr = 8; + } + + if (of_property_read_u32_array(pmic_np, + "max8997,pmic-buck1-dvs-voltage", + pdata->buck1_voltage, dvs_voltage_nr)) { + dev_err(iodev->dev, "buck1 voltages not specified\n"); + return -EINVAL; + } + + if (of_property_read_u32_array(pmic_np, + "max8997,pmic-buck2-dvs-voltage", + pdata->buck2_voltage, dvs_voltage_nr)) { + dev_err(iodev->dev, "buck2 voltages not specified\n"); + return -EINVAL; + } + + if (of_property_read_u32_array(pmic_np, + "max8997,pmic-buck5-dvs-voltage", + pdata->buck5_voltage, dvs_voltage_nr)) { + dev_err(iodev->dev, "buck5 voltages not specified\n"); + return -EINVAL; + } + + return 0; +} +#else +static int max8997_pmic_dt_parse_pdata(struct max8997_dev *iodev, + struct max8997_platform_data *pdata) +{ + return 0; +} +#endif /* CONFIG_OF */ + static __devinit int max8997_pmic_probe(struct platform_device *pdev) { struct max8997_dev *iodev = dev_get_drvdata(pdev->dev.parent); - struct max8997_platform_data *pdata = dev_get_platdata(iodev->dev); + struct max8997_platform_data *pdata = iodev->pdata; struct regulator_dev **rdev; struct max8997_data *max8997; struct i2c_client *i2c; int i, ret, size; u8 max_buck1 = 0, max_buck2 = 0, max_buck5 = 0; - if (!pdata) { + if (IS_ERR_OR_NULL(pdata)) { dev_err(pdev->dev.parent, "No platform init data supplied.\n"); return -ENODEV; } + if (iodev->dev->of_node) { + ret = max8997_pmic_dt_parse_pdata(iodev, pdata); + if (ret) + return ret; + } + max8997 = kzalloc(sizeof(struct max8997_data), GFP_KERNEL); if (!max8997) return -ENOMEM; @@ -1141,7 +1277,8 @@ static __devinit int max8997_pmic_probe(struct platform_device *pdev) regulators[id].n_voltages = 16; rdev[i] = regulator_register(®ulators[id], max8997->dev, - pdata->regulators[i].initdata, max8997, NULL); + pdata->regulators[i].initdata, max8997, + pdata->regulators[i].reg_node); if (IS_ERR(rdev[i])) { ret = PTR_ERR(rdev[i]); dev_err(max8997->dev, "regulator init failed for %d\n", |