diff options
Diffstat (limited to 'drivers/power')
| -rw-r--r-- | drivers/power/gpio-charger.c | 72 |
1 files changed, 70 insertions, 2 deletions
diff --git a/drivers/power/gpio-charger.c b/drivers/power/gpio-charger.c index 7536933d0ab9..df984ecad1cc 100644 --- a/drivers/power/gpio-charger.c +++ b/drivers/power/gpio-charger.c @@ -22,6 +22,8 @@ #include <linux/platform_device.h> #include <linux/power_supply.h> #include <linux/slab.h> +#include <linux/of.h> +#include <linux/of_gpio.h> #include <linux/power/gpio-charger.h> @@ -69,6 +71,59 @@ static enum power_supply_property gpio_charger_properties[] = { POWER_SUPPLY_PROP_ONLINE, }; +static +struct gpio_charger_platform_data *gpio_charger_parse_dt(struct device *dev) +{ + struct device_node *np = dev->of_node; + struct gpio_charger_platform_data *pdata; + const char *chargetype; + enum of_gpio_flags flags; + int ret; + + if (!np) + return ERR_PTR(-ENOENT); + + pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); + if (!pdata) + return ERR_PTR(-ENOMEM); + + pdata->name = np->name; + + pdata->gpio = of_get_gpio_flags(np, 0, &flags); + if (pdata->gpio < 0) { + if (pdata->gpio != -EPROBE_DEFER) + dev_err(dev, "could not get charger gpio\n"); + return ERR_PTR(pdata->gpio); + } + + pdata->gpio_active_low = !!(flags & OF_GPIO_ACTIVE_LOW); + + pdata->type = POWER_SUPPLY_TYPE_UNKNOWN; + ret = of_property_read_string(np, "charger-type", &chargetype); + if (ret >= 0) { + if (!strncmp("unknown", chargetype, 7)) + pdata->type = POWER_SUPPLY_TYPE_UNKNOWN; + else if (!strncmp("battery", chargetype, 7)) + pdata->type = POWER_SUPPLY_TYPE_BATTERY; + else if (!strncmp("ups", chargetype, 3)) + pdata->type = POWER_SUPPLY_TYPE_UPS; + else if (!strncmp("mains", chargetype, 5)) + pdata->type = POWER_SUPPLY_TYPE_MAINS; + else if (!strncmp("usb-sdp", chargetype, 7)) + pdata->type = POWER_SUPPLY_TYPE_USB; + else if (!strncmp("usb-dcp", chargetype, 7)) + pdata->type = POWER_SUPPLY_TYPE_USB_DCP; + else if (!strncmp("usb-cdp", chargetype, 7)) + pdata->type = POWER_SUPPLY_TYPE_USB_CDP; + else if (!strncmp("usb-aca", chargetype, 7)) + pdata->type = POWER_SUPPLY_TYPE_USB_ACA; + else + dev_warn(dev, "unknown charger type %s\n", chargetype); + } + + return pdata; +} + static int gpio_charger_probe(struct platform_device *pdev) { const struct gpio_charger_platform_data *pdata = pdev->dev.platform_data; @@ -78,8 +133,13 @@ static int gpio_charger_probe(struct platform_device *pdev) int irq; if (!pdata) { - dev_err(&pdev->dev, "No platform data\n"); - return -EINVAL; + pdata = gpio_charger_parse_dt(&pdev->dev); + if (IS_ERR(pdata)) { + ret = PTR_ERR(pdata); + if (ret != -EPROBE_DEFER) + dev_err(&pdev->dev, "No platform data\n"); + return ret; + } } if (!gpio_is_valid(pdata->gpio)) { @@ -103,6 +163,7 @@ static int gpio_charger_probe(struct platform_device *pdev) charger->get_property = gpio_charger_get_property; charger->supplied_to = pdata->supplied_to; charger->num_supplicants = pdata->num_supplicants; + charger->of_node = pdev->dev.of_node; ret = gpio_request(pdata->gpio, dev_name(&pdev->dev)); if (ret) { @@ -189,6 +250,12 @@ static int gpio_charger_resume(struct device *dev) static SIMPLE_DEV_PM_OPS(gpio_charger_pm_ops, gpio_charger_suspend, gpio_charger_resume); +static const struct of_device_id gpio_charger_match[] = { + { .compatible = "gpio-charger" }, + { } +}; +MODULE_DEVICE_TABLE(of, gpio_charger_match); + static struct platform_driver gpio_charger_driver = { .probe = gpio_charger_probe, .remove = gpio_charger_remove, @@ -196,6 +263,7 @@ static struct platform_driver gpio_charger_driver = { .name = "gpio-charger", .owner = THIS_MODULE, .pm = &gpio_charger_pm_ops, + .of_match_table = gpio_charger_match, }, }; |