From abcfaf23c7d8494bd3b3266f7a78e9efe6206ca4 Mon Sep 17 00:00:00 2001 From: Axel Lin Date: Fri, 1 Jun 2012 12:16:25 +0800 Subject: regulator: fixed: Use of_match_ptr() for of_match_table entry Use the new of_match_ptr() macro for the of_match_table pointer entry to avoid having to #define match NULL. Signed-off-by: Axel Lin Signed-off-by: Mark Brown --- drivers/regulator/fixed.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) (limited to 'drivers/regulator/fixed.c') diff --git a/drivers/regulator/fixed.c b/drivers/regulator/fixed.c index f09fe7b20e8..8bda3654ae5 100644 --- a/drivers/regulator/fixed.c +++ b/drivers/regulator/fixed.c @@ -296,8 +296,6 @@ static const struct of_device_id fixed_of_match[] __devinitconst = { {}, }; MODULE_DEVICE_TABLE(of, fixed_of_match); -#else -#define fixed_of_match NULL #endif static struct platform_driver regulator_fixed_voltage_driver = { @@ -306,7 +304,7 @@ static struct platform_driver regulator_fixed_voltage_driver = { .driver = { .name = "reg-fixed-voltage", .owner = THIS_MODULE, - .of_match_table = fixed_of_match, + .of_match_table = of_match_ptr(fixed_of_match), }, }; -- cgit v1.2.3-70-g09d2 From f141822b15635daa94610c5527806fa315f59f4d Mon Sep 17 00:00:00 2001 From: Stephen Warren Date: Fri, 29 Jun 2012 10:33:15 -0600 Subject: regulator: fixed: support deferred probe for DT GPIOs of_get_named_gpio() needs the driver hosting the GPIO that the DT property references to have been probed. Detect this specific failure, and defer the probe of the whole regulator until this API can complete. Signed-off-by: Stephen Warren Signed-off-by: Mark Brown --- drivers/regulator/fixed.c | 26 +++++++++++++++++++++----- 1 file changed, 21 insertions(+), 5 deletions(-) (limited to 'drivers/regulator/fixed.c') diff --git a/drivers/regulator/fixed.c b/drivers/regulator/fixed.c index 8bda3654ae5..b8c3a910502 100644 --- a/drivers/regulator/fixed.c +++ b/drivers/regulator/fixed.c @@ -61,11 +61,11 @@ of_get_fixed_voltage_config(struct device *dev) config = devm_kzalloc(dev, sizeof(struct fixed_voltage_config), GFP_KERNEL); if (!config) - return NULL; + return ERR_PTR(-ENOMEM); config->init_data = of_get_regulator_init_data(dev, dev->of_node); if (!config->init_data) - return NULL; + return ERR_PTR(-EINVAL); init_data = config->init_data; init_data->constraints.apply_uV = 0; @@ -76,13 +76,26 @@ of_get_fixed_voltage_config(struct device *dev) } else { dev_err(dev, "Fixed regulator specified with variable voltages\n"); - return NULL; + return ERR_PTR(-EINVAL); } if (init_data->constraints.boot_on) config->enabled_at_boot = true; config->gpio = of_get_named_gpio(np, "gpio", 0); + /* + * of_get_named_gpio() currently returns ENODEV rather than + * EPROBE_DEFER. This code attempts to be compatible with both + * for now; the ENODEV check can be removed once the API is fixed. + * of_get_named_gpio() doesn't differentiate between a missing + * property (which would be fine here, since the GPIO is optional) + * and some other error. Patches have been posted for both issues. + * Once they are check in, we should replace this with: + * if (config->gpio < 0 && config->gpio != -ENOENT) + */ + if ((config->gpio == -ENODEV) || (config->gpio == -EPROBE_DEFER)) + return ERR_PTR(-EPROBE_DEFER); + delay = of_get_property(np, "startup-delay-us", NULL); if (delay) config->startup_delay = be32_to_cpu(*delay); @@ -172,10 +185,13 @@ static int __devinit reg_fixed_voltage_probe(struct platform_device *pdev) struct regulator_config cfg = { }; int ret; - if (pdev->dev.of_node) + if (pdev->dev.of_node) { config = of_get_fixed_voltage_config(&pdev->dev); - else + if (IS_ERR(config)) + return PTR_ERR(config); + } else { config = pdev->dev.platform_data; + } if (!config) return -ENOMEM; -- cgit v1.2.3-70-g09d2 From 3d0f267fcd9197d72551baf60165b40a00dfb66a Mon Sep 17 00:00:00 2001 From: Mark Brown Date: Wed, 27 Jun 2012 14:27:22 +0100 Subject: regulator: fixed: Set enable enable_time in regulator_desc Signed-off-by: Mark Brown --- drivers/regulator/fixed.c | 12 ++---------- 1 file changed, 2 insertions(+), 10 deletions(-) (limited to 'drivers/regulator/fixed.c') diff --git a/drivers/regulator/fixed.c b/drivers/regulator/fixed.c index b8c3a910502..5adc35aa6cc 100644 --- a/drivers/regulator/fixed.c +++ b/drivers/regulator/fixed.c @@ -36,7 +36,6 @@ struct fixed_voltage_data { struct regulator_dev *dev; int microvolts; int gpio; - unsigned startup_delay; bool enable_high; bool is_enabled; }; @@ -136,13 +135,6 @@ static int fixed_voltage_disable(struct regulator_dev *dev) return 0; } -static int fixed_voltage_enable_time(struct regulator_dev *dev) -{ - struct fixed_voltage_data *data = rdev_get_drvdata(dev); - - return data->startup_delay; -} - static int fixed_voltage_get_voltage(struct regulator_dev *dev) { struct fixed_voltage_data *data = rdev_get_drvdata(dev); @@ -168,7 +160,6 @@ static struct regulator_ops fixed_voltage_gpio_ops = { .is_enabled = fixed_voltage_is_enabled, .enable = fixed_voltage_enable, .disable = fixed_voltage_disable, - .enable_time = fixed_voltage_enable_time, .get_voltage = fixed_voltage_get_voltage, .list_voltage = fixed_voltage_list_voltage, }; @@ -213,12 +204,13 @@ static int __devinit reg_fixed_voltage_probe(struct platform_device *pdev) drvdata->desc.type = REGULATOR_VOLTAGE; drvdata->desc.owner = THIS_MODULE; + drvdata->desc.enable_time = config->startup_delay; + if (config->microvolts) drvdata->desc.n_voltages = 1; drvdata->microvolts = config->microvolts; drvdata->gpio = config->gpio; - drvdata->startup_delay = config->startup_delay; if (gpio_is_valid(config->gpio)) { int gpio_flag; -- cgit v1.2.3-70-g09d2 From 25a53dfbfbfd10c52109ada40313e058b07b4b21 Mon Sep 17 00:00:00 2001 From: Mark Brown Date: Wed, 27 Jun 2012 14:30:33 +0100 Subject: regulator: fixed: Use core GPIO enable support This is essentially the code that was factored out into the core when the feature was implemented. Signed-off-by: Mark Brown --- drivers/regulator/fixed.c | 106 ++++++++-------------------------------------- 1 file changed, 18 insertions(+), 88 deletions(-) (limited to 'drivers/regulator/fixed.c') diff --git a/drivers/regulator/fixed.c b/drivers/regulator/fixed.c index 5adc35aa6cc..1a0b17e8d8a 100644 --- a/drivers/regulator/fixed.c +++ b/drivers/regulator/fixed.c @@ -35,9 +35,6 @@ struct fixed_voltage_data { struct regulator_desc desc; struct regulator_dev *dev; int microvolts; - int gpio; - bool enable_high; - bool is_enabled; }; @@ -108,33 +105,6 @@ of_get_fixed_voltage_config(struct device *dev) return config; } -static int fixed_voltage_is_enabled(struct regulator_dev *dev) -{ - struct fixed_voltage_data *data = rdev_get_drvdata(dev); - - return data->is_enabled; -} - -static int fixed_voltage_enable(struct regulator_dev *dev) -{ - struct fixed_voltage_data *data = rdev_get_drvdata(dev); - - gpio_set_value_cansleep(data->gpio, data->enable_high); - data->is_enabled = true; - - return 0; -} - -static int fixed_voltage_disable(struct regulator_dev *dev) -{ - struct fixed_voltage_data *data = rdev_get_drvdata(dev); - - gpio_set_value_cansleep(data->gpio, !data->enable_high); - data->is_enabled = false; - - return 0; -} - static int fixed_voltage_get_voltage(struct regulator_dev *dev) { struct fixed_voltage_data *data = rdev_get_drvdata(dev); @@ -156,14 +126,6 @@ static int fixed_voltage_list_voltage(struct regulator_dev *dev, return data->microvolts; } -static struct regulator_ops fixed_voltage_gpio_ops = { - .is_enabled = fixed_voltage_is_enabled, - .enable = fixed_voltage_enable, - .disable = fixed_voltage_disable, - .get_voltage = fixed_voltage_get_voltage, - .list_voltage = fixed_voltage_list_voltage, -}; - static struct regulator_ops fixed_voltage_ops = { .get_voltage = fixed_voltage_get_voltage, .list_voltage = fixed_voltage_list_voltage, @@ -203,6 +165,7 @@ static int __devinit reg_fixed_voltage_probe(struct platform_device *pdev) } drvdata->desc.type = REGULATOR_VOLTAGE; drvdata->desc.owner = THIS_MODULE; + drvdata->desc.ops = &fixed_voltage_ops; drvdata->desc.enable_time = config->startup_delay; @@ -210,53 +173,25 @@ static int __devinit reg_fixed_voltage_probe(struct platform_device *pdev) drvdata->desc.n_voltages = 1; drvdata->microvolts = config->microvolts; - drvdata->gpio = config->gpio; - - if (gpio_is_valid(config->gpio)) { - int gpio_flag; - drvdata->enable_high = config->enable_high; - - /* FIXME: Remove below print warning - * - * config->gpio must be set to -EINVAL by platform code if - * GPIO control is not required. However, early adopters - * not requiring GPIO control may forget to initialize - * config->gpio to -EINVAL. This will cause GPIO 0 to be used - * for GPIO control. - * - * This warning will be removed once there are a couple of users - * for this driver. - */ - if (!config->gpio) - dev_warn(&pdev->dev, - "using GPIO 0 for regulator enable control\n"); - - /* - * set output direction without changing state - * to prevent glitch - */ - drvdata->is_enabled = config->enabled_at_boot; - ret = drvdata->is_enabled ? - config->enable_high : !config->enable_high; - gpio_flag = ret ? GPIOF_OUT_INIT_HIGH : GPIOF_OUT_INIT_LOW; - - if (config->gpio_is_open_drain) - gpio_flag |= GPIOF_OPEN_DRAIN; - - ret = gpio_request_one(config->gpio, gpio_flag, - config->supply_name); - if (ret) { - dev_err(&pdev->dev, - "Could not obtain regulator enable GPIO %d: %d\n", - config->gpio, ret); - goto err_name; - } - - drvdata->desc.ops = &fixed_voltage_gpio_ops; + if (config->gpio >= 0) + cfg.ena_gpio = config->gpio; + cfg.ena_gpio_invert = !config->enable_high; + if (config->enabled_at_boot) { + if (config->enable_high) { + cfg.ena_gpio_flags |= GPIOF_OUT_INIT_HIGH; + } else { + cfg.ena_gpio_flags |= GPIOF_OUT_INIT_LOW; + } } else { - drvdata->desc.ops = &fixed_voltage_ops; + if (config->enable_high) { + cfg.ena_gpio_flags |= GPIOF_OUT_INIT_LOW; + } else { + cfg.ena_gpio_flags |= GPIOF_OUT_INIT_HIGH; + } } + if (config->gpio_is_open_drain) + cfg.ena_gpio_flags |= GPIOF_OPEN_DRAIN; cfg.dev = &pdev->dev; cfg.init_data = config->init_data; @@ -267,7 +202,7 @@ static int __devinit reg_fixed_voltage_probe(struct platform_device *pdev) if (IS_ERR(drvdata->dev)) { ret = PTR_ERR(drvdata->dev); dev_err(&pdev->dev, "Failed to register regulator: %d\n", ret); - goto err_gpio; + goto err_name; } platform_set_drvdata(pdev, drvdata); @@ -277,9 +212,6 @@ static int __devinit reg_fixed_voltage_probe(struct platform_device *pdev) return 0; -err_gpio: - if (gpio_is_valid(config->gpio)) - gpio_free(config->gpio); err_name: kfree(drvdata->desc.name); err: @@ -291,8 +223,6 @@ static int __devexit reg_fixed_voltage_remove(struct platform_device *pdev) struct fixed_voltage_data *drvdata = platform_get_drvdata(pdev); regulator_unregister(drvdata->dev); - if (gpio_is_valid(drvdata->gpio)) - gpio_free(drvdata->gpio); kfree(drvdata->desc.name); return 0; -- cgit v1.2.3-70-g09d2 From 6be5bfc3bf0d31a70745a52e69f7f46de974193f Mon Sep 17 00:00:00 2001 From: Laxman Dewangan Date: Thu, 5 Jul 2012 18:12:01 +0530 Subject: regulator: fixed: dt: support for input supply Add support for input supply in DT parsing of node. The input supply will be provided by the property "vin-supply" in the regulator node. Signed-off-by: Laxman Dewangan Signed-off-by: Mark Brown --- .../devicetree/bindings/regulator/fixed-regulator.txt | 2 ++ drivers/regulator/fixed.c | 19 ++++++++++++++++++- include/linux/regulator/fixed.h | 2 ++ 3 files changed, 22 insertions(+), 1 deletion(-) (limited to 'drivers/regulator/fixed.c') diff --git a/Documentation/devicetree/bindings/regulator/fixed-regulator.txt b/Documentation/devicetree/bindings/regulator/fixed-regulator.txt index 2f5b6b1ba15..4fae41d5479 100644 --- a/Documentation/devicetree/bindings/regulator/fixed-regulator.txt +++ b/Documentation/devicetree/bindings/regulator/fixed-regulator.txt @@ -10,6 +10,7 @@ Optional properties: If this property is missing, the default assumed is Active low. - gpio-open-drain: GPIO is open drain type. If this property is missing then default assumption is false. +-vin-supply: Input supply name. Any property defined as part of the core regulator binding, defined in regulator.txt, can also be used. @@ -29,4 +30,5 @@ Example: enable-active-high; regulator-boot-on; gpio-open-drain; + vin-supply = <&parent_reg>; }; diff --git a/drivers/regulator/fixed.c b/drivers/regulator/fixed.c index 1a0b17e8d8a..185468c4d38 100644 --- a/drivers/regulator/fixed.c +++ b/drivers/regulator/fixed.c @@ -102,6 +102,9 @@ of_get_fixed_voltage_config(struct device *dev) if (of_find_property(np, "gpio-open-drain", NULL)) config->gpio_is_open_drain = true; + if (of_find_property(np, "vin-supply", NULL)) + config->input_supply = "vin"; + return config; } @@ -169,6 +172,17 @@ static int __devinit reg_fixed_voltage_probe(struct platform_device *pdev) drvdata->desc.enable_time = config->startup_delay; + if (config->input_supply) { + drvdata->desc.supply_name = kstrdup(config->input_supply, + GFP_KERNEL); + if (!drvdata->desc.supply_name) { + dev_err(&pdev->dev, + "Failed to allocate input supply\n"); + ret = -ENOMEM; + goto err_name; + } + } + if (config->microvolts) drvdata->desc.n_voltages = 1; @@ -202,7 +216,7 @@ static int __devinit reg_fixed_voltage_probe(struct platform_device *pdev) if (IS_ERR(drvdata->dev)) { ret = PTR_ERR(drvdata->dev); dev_err(&pdev->dev, "Failed to register regulator: %d\n", ret); - goto err_name; + goto err_input; } platform_set_drvdata(pdev, drvdata); @@ -212,6 +226,8 @@ static int __devinit reg_fixed_voltage_probe(struct platform_device *pdev) return 0; +err_input: + kfree(drvdata->desc.supply_name); err_name: kfree(drvdata->desc.name); err: @@ -223,6 +239,7 @@ static int __devexit reg_fixed_voltage_remove(struct platform_device *pdev) struct fixed_voltage_data *drvdata = platform_get_drvdata(pdev); regulator_unregister(drvdata->dev); + kfree(drvdata->desc.supply_name); kfree(drvdata->desc.name); return 0; diff --git a/include/linux/regulator/fixed.h b/include/linux/regulator/fixed.h index f83f7440b48..d6c24c53adf 100644 --- a/include/linux/regulator/fixed.h +++ b/include/linux/regulator/fixed.h @@ -22,6 +22,7 @@ struct regulator_init_data; /** * struct fixed_voltage_config - fixed_voltage_config structure * @supply_name: Name of the regulator supply + * @input_supply: Name of the input regulator supply * @microvolts: Output voltage of regulator * @gpio: GPIO to use for enable control * set to -EINVAL if not used @@ -46,6 +47,7 @@ struct regulator_init_data; */ struct fixed_voltage_config { const char *supply_name; + const char *input_supply; int microvolts; int gpio; unsigned startup_delay; -- cgit v1.2.3-70-g09d2