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Commit 5b6a342b authored by Axel Lin's avatar Axel Lin Committed by Linus Walleij
Browse files

gpio: vx855: Switch to use managed resources APIs 



Use devm_* APIs to simplify the code a bit.

Signed-off-by: default avatarAxel Lin <axel.lin@ingics.com>
Acked-by: default avatarAlexandre Courbot <acourbot@nvidia.com>
Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
parent c458e450

drivers/gpio/gpio-vx855.c

+6 −38
Original line number Diff line number Diff line
@@ -52,8 +52,6 @@ struct vx855_gpio { 
	spinlock_t lock;

	u32 io_gpi;

	u32 io_gpo;

	bool gpi_reserved;

	bool gpo_reserved;

};



/* resolve a GPIx into the corresponding bit position */
@@ -224,14 +222,13 @@ static int vx855gpio_probe(struct platform_device *pdev) 
	struct resource *res_gpi;

	struct resource *res_gpo;

	struct vx855_gpio *vg;

	int ret;



	res_gpi = platform_get_resource(pdev, IORESOURCE_IO, 0);

	res_gpo = platform_get_resource(pdev, IORESOURCE_IO, 1);

	if (!res_gpi || !res_gpo)

		return -EBUSY;



	vg = kzalloc(sizeof(*vg), GFP_KERNEL);

	vg = devm_kzalloc(&pdev->dev, sizeof(*vg), GFP_KERNEL);

	if (!vg)

		return -ENOMEM;
@@ -250,56 +247,27 @@ static int vx855gpio_probe(struct platform_device *pdev) 
	 * succeed. Ignore and continue.

	 */



	if (!request_region(res_gpi->start, resource_size(res_gpi),

			MODULE_NAME "_gpi"))

	if (!devm_request_region(&pdev->dev, res_gpi->start,

				 resource_size(res_gpi), MODULE_NAME "_gpi"))

		dev_warn(&pdev->dev,

			"GPI I/O resource busy, probably claimed by ACPI\n");

	else

		vg->gpi_reserved = true;



	if (!request_region(res_gpo->start, resource_size(res_gpo),

			MODULE_NAME "_gpo"))

	if (!devm_request_region(&pdev->dev, res_gpo->start,

				 resource_size(res_gpo), MODULE_NAME "_gpo"))

		dev_warn(&pdev->dev,

			"GPO I/O resource busy, probably claimed by ACPI\n");

	else

		vg->gpo_reserved = true;



	vx855gpio_gpio_setup(vg);



	ret = gpiochip_add(&vg->gpio);

	if (ret) {

		dev_err(&pdev->dev, "failed to register GPIOs\n");

		goto out_release;

	}



	return 0;



out_release:

	if (vg->gpi_reserved)

		release_region(res_gpi->start, resource_size(res_gpi));

	if (vg->gpo_reserved)

		release_region(res_gpi->start, resource_size(res_gpo));

	kfree(vg);

	return ret;

	return gpiochip_add(&vg->gpio);

}



static int vx855gpio_remove(struct platform_device *pdev)

{

	struct vx855_gpio *vg = platform_get_drvdata(pdev);

	struct resource *res;



	gpiochip_remove(&vg->gpio);



	if (vg->gpi_reserved) {

		res = platform_get_resource(pdev, IORESOURCE_IO, 0);

		release_region(res->start, resource_size(res));

	}

	if (vg->gpo_reserved) {

		res = platform_get_resource(pdev, IORESOURCE_IO, 1);

		release_region(res->start, resource_size(res));

	}



	kfree(vg);

	return 0;

}