power: gpio-charger: add device tree support
From: Heiko Stuebner <heiko@...> Date: Wed, 8 Aug 2012 18:58:59 -0700
Commit-Message
From: Heiko Stuebner <heiko.stuebner@...> Add the ability to parse gpio-charger data from a devicetree node. Signed-off-by: Heiko Stuebner <heiko.stuebner@...>
Patch-Comment
drivers/power/gpio-charger.c | 66 ++++++++++++++++++++++++++++++++++++++++++-- 1 file changed, 63 insertions(+), 3 deletions(-)
Statistics
- 63 lines added
- 3 lines removed
Changes
------------------------- drivers/power/gpio-charger.c -------------------------
index a0024b2..64d31a8 100644
@@ -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>
@@ -69,17 +71,68 @@ 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(struct gpio_charger_platform_data),
+ GFP_KERNEL);
+ if (!pdata)
+ return ERR_PTR(-ENOMEM);
+
+ pdata->name = np->name;
+
+ pdata->gpio = of_get_gpio_flags(np, 0, &flags);
+ 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)
{
+ struct gpio_charger_platform_data *pdata = pdev->dev.platform_data;
struct gpio_charger *gpio_charger;
struct power_supply *charger;
int ret;
int irq;
if (!pdata) {
+ pdata = gpio_charger_parse_dt(&pdev->dev);
+ if (IS_ERR(pdata)) {
+ dev_err(&pdev->dev, "No platform data\n");
+ return -EINVAL;
+ }
}
if (!gpio_is_valid(pdata->gpio)) {
@@ -189,6 +242,12 @@ 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 +255,7 @@ static struct platform_driver gpio_charger_driver = {
.name = "gpio-charger",
.owner = THIS_MODULE,
.pm = &gpio_charger_pm_ops,
+ .of_match_table = of_match_ptr(gpio_charger_match),
},
};