Commit c8dd9cce authored by Heiko Stuebner's avatar Heiko Stuebner Committed by Sebastian Reichel
Browse files

power: gpio-charger: add device tree support 



Add the ability to parse gpio-charger data from a devicetree node.

Signed-off-by: default avatarHeiko Stuebner <heiko.stuebner@bq.com>
Reviewed-by: default avatarDoug Anderson <dianders@chromium.org>
Tested-by: default avatarDoug Anderson <dianders@chromium.org>
parent 15962df8

drivers/power/gpio-charger.c

+70 −2
Original line number Diff line number Diff line
@@ -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) {

		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 -EINVAL;

			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,

	},

};