From 8f446e6fa1d506be2cb80f91c214f1705327c7f9 Mon Sep 17 00:00:00 2001 From: Rajendra Nayak Date: Fri, 18 Nov 2011 16:47:17 +0530 Subject: regulator: helper routine to extract regulator_init_data The helper routine is meant to be used by the regulator drivers to extract the regulator_init_data structure from the data that is passed from device tree. 'consumer_supplies' which is part of regulator_init_data is not extracted as the regulator consumer mappings are passed through DT differently, implemented in subsequent patches. Similarly the regulator<-->parent/supply mapping is handled in subsequent patches. Also add documentation for regulator bindings to be used to pass regulator_init_data struct information from device tree. Some of the regulator properties which are linux and board specific, are left out since its not clear if they can be in someway embedded into the kernel or passed in from DT. They will be revisited later. Signed-off-by: Rajendra Nayak Signed-off-by: Mark Brown diff --git a/Documentation/devicetree/bindings/regulator/regulator.txt b/Documentation/devicetree/bindings/regulator/regulator.txt new file mode 100644 index 0000000..82bef20 --- /dev/null +++ b/Documentation/devicetree/bindings/regulator/regulator.txt @@ -0,0 +1,54 @@ +Voltage/Current Regulators + +Optional properties: +- regulator-name: A string used as a descriptive name for regulator outputs +- regulator-min-microvolt: smallest voltage consumers may set +- regulator-max-microvolt: largest voltage consumers may set +- regulator-microvolt-offset: Offset applied to voltages to compensate for voltage drops +- regulator-min-microamp: smallest current consumers may set +- regulator-max-microamp: largest current consumers may set +- regulator-always-on: boolean, regulator should never be disabled +- regulator-boot-on: bootloader/firmware enabled regulator +- -supply: phandle to the parent supply/regulator node + +Example: + + xyzreg: regulator@0 { + regulator-min-microvolt = <1000000>; + regulator-max-microvolt = <2500000>; + regulator-always-on; + vin-supply = <&vin>; + }; + +Regulator Consumers: +Consumer nodes can reference one or more of its supplies/ +regulators using the below bindings. + +- -supply: phandle to the regulator node + +These are the same bindings that a regulator in the above +example used to reference its own supply, in which case +its just seen as a special case of a regulator being a +consumer itself. + +Example of a consumer device node (mmc) referencing two +regulators (twl-reg1 and twl-reg2), + + twl-reg1: regulator@0 { + ... + ... + ... + }; + + twl-reg2: regulator@1 { + ... + ... + ... + }; + + mmc: mmc@0x0 { + ... + ... + vmmc-supply = <&twl-reg1>; + vmmcaux-supply = <&twl-reg2>; + }; diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile index 93a6318..c75a522 100644 --- a/drivers/regulator/Makefile +++ b/drivers/regulator/Makefile @@ -4,6 +4,7 @@ obj-$(CONFIG_REGULATOR) += core.o dummy.o +obj-$(CONFIG_OF) += of_regulator.o obj-$(CONFIG_REGULATOR_FIXED_VOLTAGE) += fixed.o obj-$(CONFIG_REGULATOR_VIRTUAL_CONSUMER) += virtual.o obj-$(CONFIG_REGULATOR_USERSPACE_CONSUMER) += userspace-consumer.o diff --git a/drivers/regulator/of_regulator.c b/drivers/regulator/of_regulator.c new file mode 100644 index 0000000..76673c7 --- /dev/null +++ b/drivers/regulator/of_regulator.c @@ -0,0 +1,81 @@ +/* + * OF helpers for regulator framework + * + * Copyright (C) 2011 Texas Instruments, Inc. + * Rajendra Nayak + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + */ + +#include +#include +#include + +static void of_get_regulation_constraints(struct device_node *np, + struct regulator_init_data **init_data) +{ + const __be32 *min_uV, *max_uV, *uV_offset; + const __be32 *min_uA, *max_uA; + struct regulation_constraints *constraints = &(*init_data)->constraints; + + constraints->name = of_get_property(np, "regulator-name", NULL); + + min_uV = of_get_property(np, "regulator-min-microvolt", NULL); + if (min_uV) + constraints->min_uV = be32_to_cpu(*min_uV); + max_uV = of_get_property(np, "regulator-max-microvolt", NULL); + if (max_uV) + constraints->max_uV = be32_to_cpu(*max_uV); + + /* Voltage change possible? */ + if (constraints->min_uV != constraints->max_uV) + constraints->valid_ops_mask |= REGULATOR_CHANGE_VOLTAGE; + + uV_offset = of_get_property(np, "regulator-microvolt-offset", NULL); + if (uV_offset) + constraints->uV_offset = be32_to_cpu(*uV_offset); + min_uA = of_get_property(np, "regulator-min-microamp", NULL); + if (min_uA) + constraints->min_uA = be32_to_cpu(*min_uA); + max_uA = of_get_property(np, "regulator-max-microamp", NULL); + if (max_uA) + constraints->max_uA = be32_to_cpu(*max_uA); + + /* Current change possible? */ + if (constraints->min_uA != constraints->max_uA) + constraints->valid_ops_mask |= REGULATOR_CHANGE_CURRENT; + + if (of_find_property(np, "regulator-boot-on", NULL)) + constraints->boot_on = true; + + if (of_find_property(np, "regulator-always-on", NULL)) + constraints->always_on = true; + else /* status change should be possible if not always on. */ + constraints->valid_ops_mask |= REGULATOR_CHANGE_STATUS; +} + +/** + * of_get_regulator_init_data - extract regulator_init_data structure info + * @dev: device requesting for regulator_init_data + * + * Populates regulator_init_data structure by extracting data from device + * tree node, returns a pointer to the populated struture or NULL if memory + * alloc fails. + */ +struct regulator_init_data *of_get_regulator_init_data(struct device *dev) +{ + struct regulator_init_data *init_data; + + if (!dev->of_node) + return NULL; + + init_data = devm_kzalloc(dev, sizeof(*init_data), GFP_KERNEL); + if (!init_data) + return NULL; /* Out of memory? */ + + of_get_regulation_constraints(dev->of_node, &init_data); + return init_data; +} diff --git a/include/linux/regulator/of_regulator.h b/include/linux/regulator/of_regulator.h new file mode 100644 index 0000000..d83a98d --- /dev/null +++ b/include/linux/regulator/of_regulator.h @@ -0,0 +1,20 @@ +/* + * OpenFirmware regulator support routines + * + */ + +#ifndef __LINUX_OF_REG_H +#define __LINUX_OF_REG_H + +#if defined(CONFIG_OF) +extern struct regulator_init_data + *of_get_regulator_init_data(struct device *dev); +#else +static inline struct regulator_init_data + *of_get_regulator_init_data(struct device *dev) +{ + return NULL; +} +#endif /* CONFIG_OF */ + +#endif /* __LINUX_OF_REG_H */ -- cgit v0.10.2 From cef49102c1d6b1e7adcb3f8b706757e0731e955c Mon Sep 17 00:00:00 2001 From: Rajendra Nayak Date: Fri, 18 Nov 2011 16:47:18 +0530 Subject: regulator: adapt fixed regulator driver to dt The fixed regulator driver uses of_get_fixed_voltage_config() to extract fixed_voltage_config structure contents from device tree. Also add documenation for additional bindings for fixed regulators that can be passed through dt. Signed-off-by: Rajendra Nayak Signed-off-by: Mark Brown diff --git a/Documentation/devicetree/bindings/regulator/fixed-regulator.txt b/Documentation/devicetree/bindings/regulator/fixed-regulator.txt new file mode 100644 index 0000000..9cf57fd --- /dev/null +++ b/Documentation/devicetree/bindings/regulator/fixed-regulator.txt @@ -0,0 +1,29 @@ +Fixed Voltage regulators + +Required properties: +- compatible: Must be "regulator-fixed"; + +Optional properties: +- gpio: gpio to use for enable control +- startup-delay-us: startup time in microseconds +- enable-active-high: Polarity of GPIO is Active high +If this property is missing, the default assumed is Active low. + +Any property defined as part of the core regulator +binding, defined in regulator.txt, can also be used. +However a fixed voltage regulator is expected to have the +regulator-min-microvolt and regulator-max-microvolt +to be the same. + +Example: + + abc: fixedregulator@0 { + compatible = "regulator-fixed"; + regulator-name = "fixed-supply"; + regulator-min-microvolt = <1800000>; + regulator-max-microvolt = <1800000>; + gpio = <&gpio1 16 0>; + startup-delay-us = <70000>; + enable-active-high; + regulator-boot-on + }; diff --git a/drivers/regulator/fixed.c b/drivers/regulator/fixed.c index 21ecf21..0650856 100644 --- a/drivers/regulator/fixed.c +++ b/drivers/regulator/fixed.c @@ -27,6 +27,10 @@ #include #include #include +#include +#include +#include +#include struct fixed_voltage_data { struct regulator_desc desc; @@ -38,6 +42,53 @@ struct fixed_voltage_data { bool is_enabled; }; + +/** + * of_get_fixed_voltage_config - extract fixed_voltage_config structure info + * @dev: device requesting for fixed_voltage_config + * + * Populates fixed_voltage_config structure by extracting data from device + * tree node, returns a pointer to the populated structure of NULL if memory + * alloc fails. + */ +struct fixed_voltage_config *of_get_fixed_voltage_config(struct device *dev) +{ + struct fixed_voltage_config *config; + struct device_node *np = dev->of_node; + const __be32 *delay; + struct regulator_init_data *init_data; + + config = devm_kzalloc(dev, sizeof(struct fixed_voltage_config), + GFP_KERNEL); + if (!config) + return NULL; + + config->init_data = of_get_regulator_init_data(dev); + init_data = config->init_data; + + config->supply_name = init_data->constraints.name; + if (init_data->constraints.min_uV == init_data->constraints.max_uV) { + config->microvolts = init_data->constraints.min_uV; + } else { + dev_err(dev, + "Fixed regulator specified with variable voltages\n"); + return NULL; + } + + if (init_data->constraints.boot_on) + config->enabled_at_boot = true; + + config->gpio = of_get_named_gpio(np, "gpio", 0); + delay = of_get_property(np, "startup-delay-us", NULL); + if (delay) + config->startup_delay = be32_to_cpu(*delay); + + if (of_find_property(np, "enable-active-high", NULL)) + config->enable_high = true; + + return config; +} + static int fixed_voltage_is_enabled(struct regulator_dev *dev) { struct fixed_voltage_data *data = rdev_get_drvdata(dev); @@ -109,6 +160,9 @@ static int __devinit reg_fixed_voltage_probe(struct platform_device *pdev) struct fixed_voltage_data *drvdata; int ret; + if (pdev->dev.of_node) + config = of_get_fixed_voltage_config(&pdev->dev); + drvdata = kzalloc(sizeof(struct fixed_voltage_data), GFP_KERNEL); if (drvdata == NULL) { dev_err(&pdev->dev, "Failed to allocate device data\n"); @@ -217,12 +271,23 @@ static int __devexit reg_fixed_voltage_remove(struct platform_device *pdev) return 0; } +#if defined(CONFIG_OF) +static const struct of_device_id fixed_of_match[] __devinitconst = { + { .compatible = "regulator-fixed", }, + {}, +}; +MODULE_DEVICE_TABLE(of, fixed_of_match); +#else +#define fixed_of_match NULL +#endif + static struct platform_driver regulator_fixed_voltage_driver = { .probe = reg_fixed_voltage_probe, .remove = __devexit_p(reg_fixed_voltage_remove), .driver = { .name = "reg-fixed-voltage", .owner = THIS_MODULE, + .of_match_table = fixed_of_match, }, }; -- cgit v0.10.2 From 2c043bcbf287dc69848054d5c02c55c20f7a7bc5 Mon Sep 17 00:00:00 2001 From: Rajendra Nayak Date: Fri, 18 Nov 2011 16:47:19 +0530 Subject: regulator: pass additional of_node to regulator_register() With device tree support for regulators, its needed that the regulator_dev->dev device has the right of_node attached. To be able to do this add an additional parameter to the regulator_register() api, wherein the dt-adapted driver can then pass this additional info onto the regulator core. Signed-off-by: Rajendra Nayak Signed-off-by: Mark Brown diff --git a/drivers/regulator/88pm8607.c b/drivers/regulator/88pm8607.c index ca0d608..df33530 100644 --- a/drivers/regulator/88pm8607.c +++ b/drivers/regulator/88pm8607.c @@ -427,7 +427,7 @@ static int __devinit pm8607_regulator_probe(struct platform_device *pdev) /* replace driver_data with info */ info->regulator = regulator_register(&info->desc, &pdev->dev, - pdata, info); + pdata, info, NULL); if (IS_ERR(info->regulator)) { dev_err(&pdev->dev, "failed to register regulator %s\n", info->desc.name); diff --git a/drivers/regulator/aat2870-regulator.c b/drivers/regulator/aat2870-regulator.c index 5abeb3a..07e98ec 100644 --- a/drivers/regulator/aat2870-regulator.c +++ b/drivers/regulator/aat2870-regulator.c @@ -188,7 +188,7 @@ static int aat2870_regulator_probe(struct platform_device *pdev) ri->pdev = pdev; rdev = regulator_register(&ri->desc, &pdev->dev, - pdev->dev.platform_data, ri); + pdev->dev.platform_data, ri, NULL); if (IS_ERR(rdev)) { dev_err(&pdev->dev, "Failed to register regulator %s\n", ri->desc.name); diff --git a/drivers/regulator/ab3100.c b/drivers/regulator/ab3100.c index 585e494..042271a 100644 --- a/drivers/regulator/ab3100.c +++ b/drivers/regulator/ab3100.c @@ -634,7 +634,7 @@ static int __devinit ab3100_regulators_probe(struct platform_device *pdev) rdev = regulator_register(&ab3100_regulator_desc[i], &pdev->dev, &plfdata->reg_constraints[i], - reg); + reg, NULL); if (IS_ERR(rdev)) { err = PTR_ERR(rdev); diff --git a/drivers/regulator/ab8500.c b/drivers/regulator/ab8500.c index 6e1ae69..e91b8dd 100644 --- a/drivers/regulator/ab8500.c +++ b/drivers/regulator/ab8500.c @@ -822,7 +822,7 @@ static __devinit int ab8500_regulator_probe(struct platform_device *pdev) /* register regulator with framework */ info->regulator = regulator_register(&info->desc, &pdev->dev, - &pdata->regulator[i], info); + &pdata->regulator[i], info, NULL); if (IS_ERR(info->regulator)) { err = PTR_ERR(info->regulator); dev_err(&pdev->dev, "failed to register regulator %s\n", diff --git a/drivers/regulator/ad5398.c b/drivers/regulator/ad5398.c index a4be416..483c809 100644 --- a/drivers/regulator/ad5398.c +++ b/drivers/regulator/ad5398.c @@ -233,7 +233,7 @@ static int __devinit ad5398_probe(struct i2c_client *client, chip->current_mask = (chip->current_level - 1) << chip->current_offset; chip->rdev = regulator_register(&ad5398_reg, &client->dev, - init_data, chip); + init_data, chip, NULL); if (IS_ERR(chip->rdev)) { ret = PTR_ERR(chip->rdev); dev_err(&client->dev, "failed to register %s %s\n", diff --git a/drivers/regulator/bq24022.c b/drivers/regulator/bq24022.c index e24d1b7..9fab6d1 100644 --- a/drivers/regulator/bq24022.c +++ b/drivers/regulator/bq24022.c @@ -107,7 +107,7 @@ static int __init bq24022_probe(struct platform_device *pdev) ret = gpio_direction_output(pdata->gpio_nce, 1); bq24022 = regulator_register(&bq24022_desc, &pdev->dev, - pdata->init_data, pdata); + pdata->init_data, pdata, NULL); if (IS_ERR(bq24022)) { dev_dbg(&pdev->dev, "couldn't register regulator\n"); ret = PTR_ERR(bq24022); diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c index 669d021..8b01eb0 100644 --- a/drivers/regulator/core.c +++ b/drivers/regulator/core.c @@ -2637,7 +2637,7 @@ static void rdev_init_debugfs(struct regulator_dev *rdev) */ struct regulator_dev *regulator_register(struct regulator_desc *regulator_desc, struct device *dev, const struct regulator_init_data *init_data, - void *driver_data) + void *driver_data, struct device_node *of_node) { static atomic_t regulator_no = ATOMIC_INIT(0); struct regulator_dev *rdev; @@ -2696,6 +2696,7 @@ struct regulator_dev *regulator_register(struct regulator_desc *regulator_desc, /* register with sysfs */ rdev->dev.class = ®ulator_class; + rdev->dev.of_node = of_node; rdev->dev.parent = dev; dev_set_name(&rdev->dev, "regulator.%d", atomic_inc_return(®ulator_no) - 1); diff --git a/drivers/regulator/da903x.c b/drivers/regulator/da903x.c index e23ddfa..8dbc54d 100644 --- a/drivers/regulator/da903x.c +++ b/drivers/regulator/da903x.c @@ -537,7 +537,7 @@ static int __devinit da903x_regulator_probe(struct platform_device *pdev) ri->desc.ops = &da9030_regulator_ldo1_15_ops; rdev = regulator_register(&ri->desc, &pdev->dev, - pdev->dev.platform_data, ri); + pdev->dev.platform_data, ri, NULL); if (IS_ERR(rdev)) { dev_err(&pdev->dev, "failed to register regulator %s\n", ri->desc.name); diff --git a/drivers/regulator/db8500-prcmu.c b/drivers/regulator/db8500-prcmu.c index 7832975..515443f 100644 --- a/drivers/regulator/db8500-prcmu.c +++ b/drivers/regulator/db8500-prcmu.c @@ -486,7 +486,7 @@ static int __devinit db8500_regulator_probe(struct platform_device *pdev) /* register with the regulator framework */ info->rdev = regulator_register(&info->desc, &pdev->dev, - init_data, info); + init_data, info, NULL); if (IS_ERR(info->rdev)) { err = PTR_ERR(info->rdev); dev_err(&pdev->dev, "failed to register %s: err %i\n", diff --git a/drivers/regulator/dummy.c b/drivers/regulator/dummy.c index b8f5205..0ee00de 100644 --- a/drivers/regulator/dummy.c +++ b/drivers/regulator/dummy.c @@ -42,7 +42,7 @@ static int __devinit dummy_regulator_probe(struct platform_device *pdev) int ret; dummy_regulator_rdev = regulator_register(&dummy_desc, NULL, - &dummy_initdata, NULL); + &dummy_initdata, NULL, NULL); if (IS_ERR(dummy_regulator_rdev)) { ret = PTR_ERR(dummy_regulator_rdev); pr_err("Failed to register regulator: %d\n", ret); diff --git a/drivers/regulator/fixed.c b/drivers/regulator/fixed.c index 0650856..db90919 100644 --- a/drivers/regulator/fixed.c +++ b/drivers/regulator/fixed.c @@ -234,7 +234,7 @@ static int __devinit reg_fixed_voltage_probe(struct platform_device *pdev) } drvdata->dev = regulator_register(&drvdata->desc, &pdev->dev, - config->init_data, drvdata); + config->init_data, drvdata, NULL); if (IS_ERR(drvdata->dev)) { ret = PTR_ERR(drvdata->dev); dev_err(&pdev->dev, "Failed to register regulator: %d\n", ret); diff --git a/drivers/regulator/isl6271a-regulator.c b/drivers/regulator/isl6271a-regulator.c index e4b3592..c1a456c 100644 --- a/drivers/regulator/isl6271a-regulator.c +++ b/drivers/regulator/isl6271a-regulator.c @@ -170,7 +170,7 @@ static int __devinit isl6271a_probe(struct i2c_client *i2c, for (i = 0; i < 3; i++) { pmic->rdev[i] = regulator_register(&isl_rd[i], &i2c->dev, - init_data, pmic); + init_data, pmic, NULL); if (IS_ERR(pmic->rdev[i])) { dev_err(&i2c->dev, "failed to register %s\n", id->name); err = PTR_ERR(pmic->rdev[i]); diff --git a/drivers/regulator/lp3971.c b/drivers/regulator/lp3971.c index 72b16b5..0cfabd3 100644 --- a/drivers/regulator/lp3971.c +++ b/drivers/regulator/lp3971.c @@ -451,7 +451,7 @@ static int __devinit setup_regulators(struct lp3971 *lp3971, for (i = 0; i < pdata->num_regulators; i++) { struct lp3971_regulator_subdev *reg = &pdata->regulators[i]; lp3971->rdev[i] = regulator_register(®ulators[reg->id], - lp3971->dev, reg->initdata, lp3971); + lp3971->dev, reg->initdata, lp3971, NULL); if (IS_ERR(lp3971->rdev[i])) { err = PTR_ERR(lp3971->rdev[i]); diff --git a/drivers/regulator/lp3972.c b/drivers/regulator/lp3972.c index fbc5e37..49a15ee 100644 --- a/drivers/regulator/lp3972.c +++ b/drivers/regulator/lp3972.c @@ -555,7 +555,7 @@ static int __devinit setup_regulators(struct lp3972 *lp3972, for (i = 0; i < pdata->num_regulators; i++) { struct lp3972_regulator_subdev *reg = &pdata->regulators[i]; lp3972->rdev[i] = regulator_register(®ulators[reg->id], - lp3972->dev, reg->initdata, lp3972); + lp3972->dev, reg->initdata, lp3972, NULL); if (IS_ERR(lp3972->rdev[i])) { err = PTR_ERR(lp3972->rdev[i]); diff --git a/drivers/regulator/max1586.c b/drivers/regulator/max1586.c index 3f49512..40e7a4d 100644 --- a/drivers/regulator/max1586.c +++ b/drivers/regulator/max1586.c @@ -214,7 +214,7 @@ static int __devinit max1586_pmic_probe(struct i2c_client *client, } rdev[i] = regulator_register(&max1586_reg[id], &client->dev, pdata->subdevs[i].platform_data, - max1586); + max1586, NULL); if (IS_ERR(rdev[i])) { ret = PTR_ERR(rdev[i]); dev_err(&client->dev, "failed to register %s\n", diff --git a/drivers/regulator/max8649.c b/drivers/regulator/max8649.c index 1062cf9..524a5da 100644 --- a/drivers/regulator/max8649.c +++ b/drivers/regulator/max8649.c @@ -347,7 +347,7 @@ static int __devinit max8649_regulator_probe(struct i2c_client *client, } info->regulator = regulator_register(&dcdc_desc, &client->dev, - pdata->regulator, info); + pdata->regulator, info, NULL); if (IS_ERR(info->regulator)) { dev_err(info->dev, "failed to register regulator %s\n", dcdc_desc.name); diff --git a/drivers/regulator/max8660.c b/drivers/regulator/max8660.c index 33f5d9a..a838e66 100644 --- a/drivers/regulator/max8660.c +++ b/drivers/regulator/max8660.c @@ -449,7 +449,7 @@ static int __devinit max8660_probe(struct i2c_client *client, rdev[i] = regulator_register(&max8660_reg[id], &client->dev, pdata->subdevs[i].platform_data, - max8660); + max8660, NULL); if (IS_ERR(rdev[i])) { ret = PTR_ERR(rdev[i]); dev_err(&client->dev, "failed to register %s\n", diff --git a/drivers/regulator/max8925-regulator.c b/drivers/regulator/max8925-regulator.c index cc9ec0e..f976e5d 100644 --- a/drivers/regulator/max8925-regulator.c +++ b/drivers/regulator/max8925-regulator.c @@ -266,7 +266,7 @@ static int __devinit max8925_regulator_probe(struct platform_device *pdev) ri->chip = chip; rdev = regulator_register(&ri->desc, &pdev->dev, - pdata->regulator[pdev->id], ri); + pdata->regulator[pdev->id], ri, NULL); if (IS_ERR(rdev)) { dev_err(&pdev->dev, "failed to register regulator %s\n", ri->desc.name); diff --git a/drivers/regulator/max8952.c b/drivers/regulator/max8952.c index 3883d85..75d8940 100644 --- a/drivers/regulator/max8952.c +++ b/drivers/regulator/max8952.c @@ -208,7 +208,7 @@ static int __devinit max8952_pmic_probe(struct i2c_client *client, max8952->pdata = pdata; max8952->rdev = regulator_register(®ulator, max8952->dev, - &pdata->reg_data, max8952); + &pdata->reg_data, max8952, NULL); if (IS_ERR(max8952->rdev)) { ret = PTR_ERR(max8952->rdev); diff --git a/drivers/regulator/max8997.c b/drivers/regulator/max8997.c index 6176129..d26e864 100644 --- a/drivers/regulator/max8997.c +++ b/drivers/regulator/max8997.c @@ -1146,7 +1146,7 @@ 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); + pdata->regulators[i].initdata, max8997, NULL); if (IS_ERR(rdev[i])) { ret = PTR_ERR(rdev[i]); dev_err(max8997->dev, "regulator init failed for %d\n", diff --git a/drivers/regulator/max8998.c b/drivers/regulator/max8998.c index 41a1495..2d38c24 100644 --- a/drivers/regulator/max8998.c +++ b/drivers/regulator/max8998.c @@ -847,7 +847,7 @@ static __devinit int max8998_pmic_probe(struct platform_device *pdev) regulators[index].n_voltages = count; } rdev[i] = regulator_register(®ulators[index], max8998->dev, - pdata->regulators[i].initdata, max8998); + pdata->regulators[i].initdata, max8998, NULL); if (IS_ERR(rdev[i])) { ret = PTR_ERR(rdev[i]); dev_err(max8998->dev, "regulator init failed\n"); diff --git a/drivers/regulator/mc13783-regulator.c b/drivers/regulator/mc13783-regulator.c index 8479082..56d4a67 100644 --- a/drivers/regulator/mc13783-regulator.c +++ b/drivers/regulator/mc13783-regulator.c @@ -357,7 +357,7 @@ static int __devinit mc13783_regulator_probe(struct platform_device *pdev) init_data = &pdata->regulators[i]; priv->regulators[i] = regulator_register( &mc13783_regulators[init_data->id].desc, - &pdev->dev, init_data->init_data, priv); + &pdev->dev, init_data->init_data, priv, NULL); if (IS_ERR(priv->regulators[i])) { dev_err(&pdev->dev, "failed to register regulator %s\n", diff --git a/drivers/regulator/mc13892-regulator.c b/drivers/regulator/mc13892-regulator.c index 023d17d..2824804 100644 --- a/drivers/regulator/mc13892-regulator.c +++ b/drivers/regulator/mc13892-regulator.c @@ -573,7 +573,7 @@ static int __devinit mc13892_regulator_probe(struct platform_device *pdev) init_data = &pdata->regulators[i]; priv->regulators[i] = regulator_register( &mc13892_regulators[init_data->id].desc, - &pdev->dev, init_data->init_data, priv); + &pdev->dev, init_data->init_data, priv, NULL); if (IS_ERR(priv->regulators[i])) { dev_err(&pdev->dev, "failed to register regulator %s\n", diff --git a/drivers/regulator/pcap-regulator.c b/drivers/regulator/pcap-regulator.c index 31f6e11..a5aab1b 100644 --- a/drivers/regulator/pcap-regulator.c +++ b/drivers/regulator/pcap-regulator.c @@ -277,7 +277,7 @@ static int __devinit pcap_regulator_probe(struct platform_device *pdev) void *pcap = dev_get_drvdata(pdev->dev.parent); rdev = regulator_register(&pcap_regulators[pdev->id], &pdev->dev, - pdev->dev.platform_data, pcap); + pdev->dev.platform_data, pcap, NULL); if (IS_ERR(rdev)) return PTR_ERR(rdev); diff --git a/drivers/regulator/pcf50633-regulator.c b/drivers/regulator/pcf50633-regulator.c index 69a11d9..1d1c310 100644 --- a/drivers/regulator/pcf50633-regulator.c +++ b/drivers/regulator/pcf50633-regulator.c @@ -320,7 +320,7 @@ static int __devinit pcf50633_regulator_probe(struct platform_device *pdev) pcf = dev_to_pcf50633(pdev->dev.parent); rdev = regulator_register(®ulators[pdev->id], &pdev->dev, - pdev->dev.platform_data, pcf); + pdev->dev.platform_data, pcf, NULL); if (IS_ERR(rdev)) return PTR_ERR(rdev); diff --git a/drivers/regulator/tps6105x-regulator.c b/drivers/regulator/tps6105x-regulator.c index 1011873..d9278da 100644 --- a/drivers/regulator/tps6105x-regulator.c +++ b/drivers/regulator/tps6105x-regulator.c @@ -151,7 +151,8 @@ static int __devinit tps6105x_regulator_probe(struct platform_device *pdev) /* Register regulator with framework */ tps6105x->regulator = regulator_register(&tps6105x_regulator_desc, &tps6105x->client->dev, - pdata->regulator_data, tps6105x); + pdata->regulator_data, tps6105x, + NULL); if (IS_ERR(tps6105x->regulator)) { ret = PTR_ERR(tps6105x->regulator); dev_err(&tps6105x->client->dev, diff --git a/drivers/regulator/tps65023-regulator.c b/drivers/regulator/tps65023-regulator.c index 9fb4c7b..7fd3b90 100644 --- a/drivers/regulator/tps65023-regulator.c +++ b/drivers/regulator/tps65023-regulator.c @@ -496,7 +496,7 @@ static int __devinit tps_65023_probe(struct i2c_client *client, /* Register the regulators */ rdev = regulator_register(&tps->desc[i], &client->dev, - init_data, tps); + init_data, tps, NULL); if (IS_ERR(rdev)) { dev_err(&client->dev, "failed to register %s\n", id->name); diff --git a/drivers/regulator/tps6507x-regulator.c b/drivers/regulator/tps6507x-regulator.c index bdef703..0b63ef7 100644 --- a/drivers/regulator/tps6507x-regulator.c +++ b/drivers/regulator/tps6507x-regulator.c @@ -599,7 +599,7 @@ int tps6507x_pmic_probe(struct platform_device *pdev) tps->desc[i].owner = THIS_MODULE; rdev = regulator_register(&tps->desc[i], - tps6507x_dev->dev, init_data, tps); + tps6507x_dev->dev, init_data, tps, NULL); if (IS_ERR(rdev)) { dev_err(tps6507x_dev->dev, "failed to register %s regulator\n", diff --git a/drivers/regulator/tps6524x-regulator.c b/drivers/regulator/tps6524x-regulator.c index 9166aa0..70b7b1f 100644 --- a/drivers/regulator/tps6524x-regulator.c +++ b/drivers/regulator/tps6524x-regulator.c @@ -651,7 +651,7 @@ static int __devinit pmic_probe(struct spi_device *spi) hw->desc[i].n_voltages = 1; hw->rdev[i] = regulator_register(&hw->desc[i], dev, - init_data, hw); + init_data, hw, NULL); if (IS_ERR(hw->rdev[i])) { ret = PTR_ERR(hw->rdev[i]); hw->rdev[i] = NULL; diff --git a/drivers/regulator/tps6586x-regulator.c b/drivers/regulator/tps6586x-regulator.c index 14b9389..c75fb20 100644 --- a/drivers/regulator/tps6586x-regulator.c +++ b/drivers/regulator/tps6586x-regulator.c @@ -396,7 +396,7 @@ static int __devinit tps6586x_regulator_probe(struct platform_device *pdev) return err; rdev = regulator_register(&ri->desc, &pdev->dev, - pdev->dev.platform_data, ri); + pdev->dev.platform_data, ri, NULL); if (IS_ERR(rdev)) { dev_err(&pdev->dev, "failed to register regulator %s\n", ri->desc.name); diff --git a/drivers/regulator/tps65910-regulator.c b/drivers/regulator/tps65910-regulator.c index 66d2d60..eaea9b4 100644 --- a/drivers/regulator/tps65910-regulator.c +++ b/drivers/regulator/tps65910-regulator.c @@ -963,7 +963,7 @@ static __devinit int tps65910_probe(struct platform_device *pdev) pmic->desc[i].owner = THIS_MODULE; rdev = regulator_register(&pmic->desc[i], - tps65910->dev, reg_data, pmic); + tps65910->dev, reg_data, pmic, NULL); if (IS_ERR(rdev)) { dev_err(tps65910->dev, "failed to register %s regulator\n", diff --git a/drivers/regulator/tps65912-regulator.c b/drivers/regulator/tps65912-regulator.c index 39d4a17..da00d88 100644 --- a/drivers/regulator/tps65912-regulator.c +++ b/drivers/regulator/tps65912-regulator.c @@ -727,7 +727,7 @@ static __devinit int tps65912_probe(struct platform_device *pdev) pmic->desc[i].owner = THIS_MODULE; range = tps65912_get_range(pmic, i); rdev = regulator_register(&pmic->desc[i], - tps65912->dev, reg_data, pmic); + tps65912->dev, reg_data, pmic, NULL); if (IS_ERR(rdev)) { dev_err(tps65912->dev, "failed to register %s regulator\n", diff --git a/drivers/regulator/twl-regulator.c b/drivers/regulator/twl-regulator.c index ee8747f..9a2e07a 100644 --- a/drivers/regulator/twl-regulator.c +++ b/drivers/regulator/twl-regulator.c @@ -1070,7 +1070,7 @@ static int __devinit twlreg_probe(struct platform_device *pdev) break; } - rdev = regulator_register(&info->desc, &pdev->dev, initdata, info); + rdev = regulator_register(&info->desc, &pdev->dev, initdata, info, NULL); if (IS_ERR(rdev)) { dev_err(&pdev->dev, "can't register %s, %ld\n", info->desc.name, PTR_ERR(rdev)); diff --git a/drivers/regulator/wm831x-dcdc.c b/drivers/regulator/wm831x-dcdc.c index bd3531d..7558a96 100644 --- a/drivers/regulator/wm831x-dcdc.c +++ b/drivers/regulator/wm831x-dcdc.c @@ -553,7 +553,7 @@ static __devinit int wm831x_buckv_probe(struct platform_device *pdev) wm831x_buckv_dvs_init(dcdc, pdata->dcdc[id]->driver_data); dcdc->regulator = regulator_register(&dcdc->desc, &pdev->dev, - pdata->dcdc[id], dcdc); + pdata->dcdc[id], dcdc, NULL); if (IS_ERR(dcdc->regulator)) { ret = PTR_ERR(dcdc->regulator); dev_err(wm831x->dev, "Failed to register DCDC%d: %d\n", @@ -747,7 +747,7 @@ static __devinit int wm831x_buckp_probe(struct platform_device *pdev) dcdc->desc.owner = THIS_MODULE; dcdc->regulator = regulator_register(&dcdc->desc, &pdev->dev, - pdata->dcdc[id], dcdc); + pdata->dcdc[id], dcdc, NULL); if (IS_ERR(dcdc->regulator)) { ret = PTR_ERR(dcdc->regulator); dev_err(wm831x->dev, "Failed to register DCDC%d: %d\n", @@ -874,7 +874,7 @@ static __devinit int wm831x_boostp_probe(struct platform_device *pdev) dcdc->desc.owner = THIS_MODULE; dcdc->regulator = regulator_register(&dcdc->desc, &pdev->dev, - pdata->dcdc[id], dcdc); + pdata->dcdc[id], dcdc, NULL); if (IS_ERR(dcdc->regulator)) { ret = PTR_ERR(dcdc->regulator); dev_err(wm831x->dev, "Failed to register DCDC%d: %d\n", @@ -973,7 +973,7 @@ static __devinit int wm831x_epe_probe(struct platform_device *pdev) dcdc->desc.owner = THIS_MODULE; dcdc->regulator = regulator_register(&dcdc->desc, &pdev->dev, - pdata->epe[id], dcdc); + pdata->epe[id], dcdc, NULL); if (IS_ERR(dcdc->regulator)) { ret = PTR_ERR(dcdc->regulator); dev_err(wm831x->dev, "Failed to register EPE%d: %d\n", diff --git a/drivers/regulator/wm831x-isink.c b/drivers/regulator/wm831x-isink.c index 01f27c7..d3ad3f5 100644 --- a/drivers/regulator/wm831x-isink.c +++ b/drivers/regulator/wm831x-isink.c @@ -189,7 +189,7 @@ static __devinit int wm831x_isink_probe(struct platform_device *pdev) isink->desc.owner = THIS_MODULE; isink->regulator = regulator_register(&isink->desc, &pdev->dev, - pdata->isink[id], isink); + pdata->isink[id], isink, NULL); if (IS_ERR(isink->regulator)) { ret = PTR_ERR(isink->regulator); dev_err(wm831x->dev, "Failed to register ISINK%d: %d\n", diff --git a/drivers/regulator/wm831x-ldo.c b/drivers/regulator/wm831x-ldo.c index 6709710..5e96a23 100644 --- a/drivers/regulator/wm831x-ldo.c +++ b/drivers/regulator/wm831x-ldo.c @@ -351,7 +351,7 @@ static __devinit int wm831x_gp_ldo_probe(struct platform_device *pdev) ldo->desc.owner = THIS_MODULE; ldo->regulator = regulator_register(&ldo->desc, &pdev->dev, - pdata->ldo[id], ldo); + pdata->ldo[id], ldo, NULL); if (IS_ERR(ldo->regulator)) { ret = PTR_ERR(ldo->regulator); dev_err(wm831x->dev, "Failed to register LDO%d: %d\n", @@ -621,7 +621,7 @@ static __devinit int wm831x_aldo_probe(struct platform_device *pdev) ldo->desc.owner = THIS_MODULE; ldo->regulator = regulator_register(&ldo->desc, &pdev->dev, - pdata->ldo[id], ldo); + pdata->ldo[id], ldo, NULL); if (IS_ERR(ldo->regulator)) { ret = PTR_ERR(ldo->regulator); dev_err(wm831x->dev, "Failed to register LDO%d: %d\n", @@ -818,7 +818,7 @@ static __devinit int wm831x_alive_ldo_probe(struct platform_device *pdev) ldo->desc.owner = THIS_MODULE; ldo->regulator = regulator_register(&ldo->desc, &pdev->dev, - pdata->ldo[id], ldo); + pdata->ldo[id], ldo, NULL); if (IS_ERR(ldo->regulator)) { ret = PTR_ERR(ldo->regulator); dev_err(wm831x->dev, "Failed to register LDO%d: %d\n", diff --git a/drivers/regulator/wm8350-regulator.c b/drivers/regulator/wm8350-regulator.c index 1bcb22c..6894009 100644 --- a/drivers/regulator/wm8350-regulator.c +++ b/drivers/regulator/wm8350-regulator.c @@ -1428,7 +1428,7 @@ static int wm8350_regulator_probe(struct platform_device *pdev) /* register regulator */ rdev = regulator_register(&wm8350_reg[pdev->id], &pdev->dev, pdev->dev.platform_data, - dev_get_drvdata(&pdev->dev)); + dev_get_drvdata(&pdev->dev), NULL); if (IS_ERR(rdev)) { dev_err(&pdev->dev, "failed to register %s\n", wm8350_reg[pdev->id].name); diff --git a/drivers/regulator/wm8400-regulator.c b/drivers/regulator/wm8400-regulator.c index 71632dd..706f395 100644 --- a/drivers/regulator/wm8400-regulator.c +++ b/drivers/regulator/wm8400-regulator.c @@ -326,7 +326,7 @@ static int __devinit wm8400_regulator_probe(struct platform_device *pdev) struct regulator_dev *rdev; rdev = regulator_register(®ulators[pdev->id], &pdev->dev, - pdev->dev.platform_data, wm8400); + pdev->dev.platform_data, wm8400, NULL); if (IS_ERR(rdev)) return PTR_ERR(rdev); diff --git a/drivers/regulator/wm8994-regulator.c b/drivers/regulator/wm8994-regulator.c index b87bf5c..435e335 100644 --- a/drivers/regulator/wm8994-regulator.c +++ b/drivers/regulator/wm8994-regulator.c @@ -269,7 +269,7 @@ static __devinit int wm8994_ldo_probe(struct platform_device *pdev) ldo->is_enabled = true; ldo->regulator = regulator_register(&wm8994_ldo_desc[id], &pdev->dev, - pdata->ldo[id].init_data, ldo); + pdata->ldo[id].init_data, ldo, NULL); if (IS_ERR(ldo->regulator)) { ret = PTR_ERR(ldo->regulator); dev_err(wm8994->dev, "Failed to register LDO%d: %d\n", diff --git a/include/linux/regulator/driver.h b/include/linux/regulator/driver.h index 52c89ae..8fbb696 100644 --- a/include/linux/regulator/driver.h +++ b/include/linux/regulator/driver.h @@ -212,7 +212,7 @@ struct regulator_dev { struct regulator_dev *regulator_register(struct regulator_desc *regulator_desc, struct device *dev, const struct regulator_init_data *init_data, - void *driver_data); + void *driver_data, struct device_node *of_node); void regulator_unregister(struct regulator_dev *rdev); int regulator_notifier_call_chain(struct regulator_dev *rdev, diff --git a/sound/soc/codecs/sgtl5000.c b/sound/soc/codecs/sgtl5000.c index d15695d..fc7ab30 100644 --- a/sound/soc/codecs/sgtl5000.c +++ b/sound/soc/codecs/sgtl5000.c @@ -833,7 +833,7 @@ static int ldo_regulator_register(struct snd_soc_codec *codec, ldo->voltage = voltage; ldo->dev = regulator_register(&ldo->desc, codec->dev, - init_data, ldo); + init_data, ldo, NULL); if (IS_ERR(ldo->dev)) { int ret = PTR_ERR(ldo->dev); -- cgit v0.10.2 From 69511a452e6dc6b74fe4f3671a51b1b44b9c57e3 Mon Sep 17 00:00:00 2001 From: Rajendra Nayak Date: Fri, 18 Nov 2011 16:47:20 +0530 Subject: regulator: map consumer regulator based on device tree Device nodes in DT can associate themselves with one or more regulators/supply by providing a list of phandles (to regulator nodes) and corresponding supply names. For Example: devicenode: node@0x0 { ... ... vmmc-supply = <®ulator1>; vpll-supply = <®ulator2>; }; The driver would then do a regulator_get(dev, "vmmc"); to get regulator1 and do a regulator_get(dev, "vpll"); to get regulator2. of_get_regulator() extracts the regulator node for a given device, based on the supply name. Use it to look up the regulator for a given consumer from device tree, during a regulator_get(). If not found fallback and lookup through the regulator_map_list instead. Also, since the regulator dt nodes can use the same binding to associate with a parent regulator/supply, allow the drivers to specify a supply_name, which can then be used to lookup dt to find the parent phandle. Signed-off-by: Rajendra Nayak Acked-by: Grant Likely Signed-off-by: Mark Brown diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c index 8b01eb0..9867ebc 100644 --- a/drivers/regulator/core.c +++ b/drivers/regulator/core.c @@ -25,6 +25,8 @@ #include #include #include +#include +#include #include #include #include @@ -132,6 +134,33 @@ static struct regulator *get_device_regulator(struct device *dev) return NULL; } +/** + * of_get_regulator - get a regulator device node based on supply name + * @dev: Device pointer for the consumer (of regulator) device + * @supply: regulator supply name + * + * Extract the regulator device node corresponding to the supply name. + * retruns the device node corresponding to the regulator if found, else + * returns NULL. + */ +static struct device_node *of_get_regulator(struct device *dev, const char *supply) +{ + struct device_node *regnode = NULL; + char prop_name[32]; /* 32 is max size of property name */ + + dev_dbg(dev, "Looking up %s-supply from device tree\n", supply); + + snprintf(prop_name, 32, "%s-supply", supply); + regnode = of_parse_phandle(dev->of_node, prop_name, 0); + + if (!regnode) { + dev_warn(dev, "%s property in node %s references invalid phandle", + prop_name, dev->of_node->full_name); + return NULL; + } + return regnode; +} + /* Platform voltage constraint check */ static int regulator_check_voltage(struct regulator_dev *rdev, int *min_uV, int *max_uV) @@ -1148,6 +1177,30 @@ static int _regulator_get_enable_time(struct regulator_dev *rdev) return rdev->desc->ops->enable_time(rdev); } +static struct regulator_dev *regulator_dev_lookup(struct device *dev, + const char *supply) +{ + struct regulator_dev *r; + struct device_node *node; + + /* first do a dt based lookup */ + if (dev && dev->of_node) { + node = of_get_regulator(dev, supply); + if (node) + list_for_each_entry(r, ®ulator_list, list) + if (r->dev.parent && + node == r->dev.of_node) + return r; + } + + /* if not found, try doing it non-dt way */ + list_for_each_entry(r, ®ulator_list, list) + if (strcmp(rdev_get_name(r), supply) == 0) + return r; + + return NULL; +} + /* Internal regulator request function */ static struct regulator *_regulator_get(struct device *dev, const char *id, int exclusive) @@ -1168,6 +1221,10 @@ static struct regulator *_regulator_get(struct device *dev, const char *id, mutex_lock(®ulator_list_mutex); + rdev = regulator_dev_lookup(dev, id); + if (rdev) + goto found; + list_for_each_entry(map, ®ulator_map_list, list) { /* If the mapping has a device set up it must match */ if (map->dev_name && @@ -2642,6 +2699,7 @@ struct regulator_dev *regulator_register(struct regulator_desc *regulator_desc, static atomic_t regulator_no = ATOMIC_INIT(0); struct regulator_dev *rdev; int ret, i; + const char *supply = NULL; if (regulator_desc == NULL) return ERR_PTR(-EINVAL); @@ -2718,21 +2776,18 @@ struct regulator_dev *regulator_register(struct regulator_desc *regulator_desc, if (ret < 0) goto scrub; - if (init_data->supply_regulator) { + if (init_data->supply_regulator) + supply = init_data->supply_regulator; + else if (regulator_desc->supply_name) + supply = regulator_desc->supply_name; + + if (supply) { struct regulator_dev *r; - int found = 0; - list_for_each_entry(r, ®ulator_list, list) { - if (strcmp(rdev_get_name(r), - init_data->supply_regulator) == 0) { - found = 1; - break; - } - } + r = regulator_dev_lookup(dev, supply); - if (!found) { - dev_err(dev, "Failed to find supply %s\n", - init_data->supply_regulator); + if (!r) { + dev_err(dev, "Failed to find supply %s\n", supply); ret = -ENODEV; goto scrub; } diff --git a/include/linux/regulator/driver.h b/include/linux/regulator/driver.h index 8fbb696..4214b9a 100644 --- a/include/linux/regulator/driver.h +++ b/include/linux/regulator/driver.h @@ -154,6 +154,7 @@ enum regulator_type { * this type. * * @name: Identifying name for the regulator. + * @supply_name: Identifying the regulator supply * @id: Numerical identifier for the regulator. * @n_voltages: Number of selectors available for ops.list_voltage(). * @ops: Regulator operations table. @@ -163,6 +164,7 @@ enum regulator_type { */ struct regulator_desc { const char *name; + const char *supply_name; int id; unsigned n_voltages; struct regulator_ops *ops; -- cgit v0.10.2