struct regulator_desc desc;
struct regulator_dev *dev;
int microvolts;
- int gpio;
- unsigned startup_delay;
- bool enable_high;
- bool is_enabled;
};
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;
} 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);
if (of_find_property(np, "gpio-open-drain", NULL))
config->gpio_is_open_drain = true;
- 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;
-}
+ if (of_find_property(np, "vin-supply", NULL))
+ config->input_supply = "vin";
-static int fixed_voltage_enable_time(struct regulator_dev *dev)
-{
- struct fixed_voltage_data *data = rdev_get_drvdata(dev);
-
- return data->startup_delay;
+ return config;
}
static int fixed_voltage_get_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,
- .enable_time = fixed_voltage_enable_time,
- .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,
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;
}
drvdata->desc.type = REGULATOR_VOLTAGE;
drvdata->desc.owner = THIS_MODULE;
+ drvdata->desc.ops = &fixed_voltage_ops;
- if (config->microvolts)
- drvdata->desc.n_voltages = 1;
+ drvdata->desc.enable_time = config->startup_delay;
- drvdata->microvolts = config->microvolts;
- drvdata->gpio = config->gpio;
- drvdata->startup_delay = config->startup_delay;
-
- 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) {
+ if (config->input_supply) {
+ drvdata->desc.supply_name = kstrdup(config->input_supply,
+ GFP_KERNEL);
+ if (!drvdata->desc.supply_name) {
dev_err(&pdev->dev,
- "Could not obtain regulator enable GPIO %d: %d\n",
- config->gpio, ret);
+ "Failed to allocate input supply\n");
+ ret = -ENOMEM;
goto err_name;
}
+ }
+
+ if (config->microvolts)
+ drvdata->desc.n_voltages = 1;
- drvdata->desc.ops = &fixed_voltage_gpio_ops;
+ drvdata->microvolts = config->microvolts;
+ 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;
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_input;
}
platform_set_drvdata(pdev, drvdata);
return 0;
-err_gpio:
- if (gpio_is_valid(config->gpio))
- gpio_free(config->gpio);
+err_input:
+ kfree(drvdata->desc.supply_name);
err_name:
kfree(drvdata->desc.name);
err:
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.supply_name);
kfree(drvdata->desc.name);
return 0;
{},
};
MODULE_DEVICE_TABLE(of, fixed_of_match);
-#else
-#define fixed_of_match NULL
#endif
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),
},
};
projects / mirror_ubuntu-bionic-kernel.git / blobdiff