diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/mfd/max8997.c | 73 | ||||
| -rw-r--r-- | drivers/regulator/max8997.c | 181 |
2 files changed, 236 insertions, 18 deletions
diff --git a/drivers/mfd/max8997.c b/drivers/mfd/max8997.c index f123517065ec..abd5c80c7cf5 100644 --- a/drivers/mfd/max8997.c +++ b/drivers/mfd/max8997.c @@ -21,8 +21,10 @@ * This driver is based on max8998.c */ +#include <linux/err.h> #include <linux/slab.h> #include <linux/i2c.h> +#include <linux/of_irq.h> #include <linux/interrupt.h> #include <linux/pm_runtime.h> #include <linux/module.h> @@ -47,6 +49,13 @@ static struct mfd_cell max8997_devs[] = { { .name = "max8997-led", .id = 2 }, }; +#ifdef CONFIG_OF +static struct of_device_id __devinitdata max8997_pmic_dt_match[] = { + { .compatible = "maxim,max8997-pmic", .data = TYPE_MAX8997 }, + {}, +}; +#endif + int max8997_read_reg(struct i2c_client *i2c, u8 reg, u8 *dest) { struct max8997_dev *max8997 = i2c_get_clientdata(i2c); @@ -123,6 +132,58 @@ int max8997_update_reg(struct i2c_client *i2c, u8 reg, u8 val, u8 mask) } EXPORT_SYMBOL_GPL(max8997_update_reg); +#ifdef CONFIG_OF +/* + * Only the common platform data elements for max8997 are parsed here from the + * device tree. Other sub-modules of max8997 such as pmic, rtc and others have + * to parse their own platform data elements from device tree. + * + * The max8997 platform data structure is instantiated here and the drivers for + * the sub-modules need not instantiate another instance while parsing their + * platform data. + */ +static struct max8997_platform_data *max8997_i2c_parse_dt_pdata( + struct device *dev) +{ + struct max8997_platform_data *pd; + + pd = devm_kzalloc(dev, sizeof(*pd), GFP_KERNEL); + if (!pd) { + dev_err(dev, "could not allocate memory for pdata\n"); + return ERR_PTR(-ENOMEM); + } + + pd->ono = irq_of_parse_and_map(dev->of_node, 1); + + /* + * ToDo: the 'wakeup' member in the platform data is more of a linux + * specfic information. Hence, there is no binding for that yet and + * not parsed here. + */ + + return pd; +} +#else +static struct max8997_platform_data *max8997_i2c_parse_dt_pdata( + struct device *dev) +{ + return 0; +} +#endif + +static inline int max8997_i2c_get_driver_data(struct i2c_client *i2c, + const struct i2c_device_id *id) +{ +#ifdef CONFIG_OF + if (i2c->dev.of_node) { + const struct of_device_id *match; + match = of_match_node(max8997_pmic_dt_match, i2c->dev.of_node); + return (int)match->data; + } +#endif + return (int)id->driver_data; +} + static int max8997_i2c_probe(struct i2c_client *i2c, const struct i2c_device_id *id) { @@ -137,12 +198,21 @@ static int max8997_i2c_probe(struct i2c_client *i2c, i2c_set_clientdata(i2c, max8997); max8997->dev = &i2c->dev; max8997->i2c = i2c; - max8997->type = id->driver_data; + max8997->type = max8997_i2c_get_driver_data(i2c, id); max8997->irq = i2c->irq; + if (max8997->dev->of_node) { + pdata = max8997_i2c_parse_dt_pdata(max8997->dev); + if (IS_ERR(pdata)) { + ret = PTR_ERR(pdata); + goto err; + } + } + if (!pdata) goto err; + max8997->pdata = pdata; max8997->ono = pdata->ono; mutex_init(&max8997->iolock); @@ -434,6 +504,7 @@ static struct i2c_driver max8997_i2c_driver = { .name = "max8997", .owner = THIS_MODULE, .pm = &max8997_pm, + .of_match_table = of_match_ptr(max8997_pmic_dt_match), }, .probe = max8997_i2c_probe, .remove = max8997_i2c_remove, diff --git a/drivers/regulator/max8997.c b/drivers/regulator/max8997.c index cea9ec9093eb..df0eafb0dc7e 100644 --- a/drivers/regulator/max8997.c +++ b/drivers/regulator/max8997.c @@ -24,6 +24,7 @@ #include <linux/bug.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> @@ -31,6 +32,7 @@ #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; @@ -933,22 +935,163 @@ static struct regulator_desc regulators[] = { max8997_charger_fixedstate_ops), }; +#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; + + if (i == ARRAY_SIZE(regulators)) { + dev_warn(iodev->dev, "don't know how to configure " + "regulator %s\n", reg_np->name); + continue; + } + + 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 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_config config = { }; struct regulator_dev **rdev; struct max8997_data *max8997; struct i2c_client *i2c; - int i, ret, size; + int i, ret, size, nr_dvs; 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 = devm_kzalloc(&pdev->dev, sizeof(struct max8997_data), GFP_KERNEL); if (!max8997) @@ -973,7 +1116,10 @@ static int max8997_pmic_probe(struct platform_device *pdev) memcpy(max8997->buck125_gpios, pdata->buck125_gpios, sizeof(int) * 3); max8997->ignore_gpiodvs_side_effect = pdata->ignore_gpiodvs_side_effect; - for (i = 0; i < 8; i++) { + nr_dvs = (pdata->buck1_gpiodvs || pdata->buck2_gpiodvs || + pdata->buck5_gpiodvs) ? 8 : 1; + + for (i = 0; i < nr_dvs; i++) { max8997->buck1_vol[i] = ret = max8997_get_voltage_proper_val( &buck1245_voltage_map_desc, @@ -1019,6 +1165,19 @@ static int max8997_pmic_probe(struct platform_device *pdev) max_buck5, 0x3f); } + /* Initialize all the DVS related BUCK registers */ + for (i = 0; i < nr_dvs; i++) { + max8997_update_reg(i2c, MAX8997_REG_BUCK1DVS1 + i, + max8997->buck1_vol[i], + 0x3f); + max8997_update_reg(i2c, MAX8997_REG_BUCK2DVS1 + i, + max8997->buck2_vol[i], + 0x3f); + max8997_update_reg(i2c, MAX8997_REG_BUCK5DVS1 + i, + max8997->buck5_vol[i], + 0x3f); + } + /* * If buck 1, 2, and 5 do not care DVS GPIO settings, ignore them. * If at least one of them cares, set gpios. @@ -1068,19 +1227,6 @@ static int max8997_pmic_probe(struct platform_device *pdev) max8997_update_reg(i2c, MAX8997_REG_BUCK5CTRL, (pdata->buck5_gpiodvs) ? (1 << 1) : (0 << 1), 1 << 1); - /* Initialize all the DVS related BUCK registers */ - for (i = 0; i < 8; i++) { - max8997_update_reg(i2c, MAX8997_REG_BUCK1DVS1 + i, - max8997->buck1_vol[i], - 0x3f); - max8997_update_reg(i2c, MAX8997_REG_BUCK2DVS1 + i, - max8997->buck2_vol[i], - 0x3f); - max8997_update_reg(i2c, MAX8997_REG_BUCK5DVS1 + i, - max8997->buck5_vol[i], - 0x3f); - } - /* Misc Settings */ max8997->ramp_delay = 10; /* set 10mV/us, which is the default */ max8997_write_reg(i2c, MAX8997_REG_BUCKRAMP, (0xf << 4) | 0x9); @@ -1101,6 +1247,7 @@ static int max8997_pmic_probe(struct platform_device *pdev) config.dev = max8997->dev; config.init_data = pdata->regulators[i].initdata; config.driver_data = max8997; + config.of_node = pdata->regulators[i].reg_node; rdev[i] = regulator_register(®ulators[id], &config); if (IS_ERR(rdev[i])) { |