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Commit da9df93e authored by Axel Lin's avatar Axel Lin Committed by Linus Walleij
Browse files

gpio: dwapb: Convert to use resource managed APIs 



Use resource managed APIs to simplify the code a bit.

Signed-off-by: default avatarAxel Lin <axel.lin@ingics.com>
Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
parent 08b89fa2

drivers/gpio/gpio-dwapb.c

+14 −39
Original line number Diff line number Diff line
@@ -469,15 +469,13 @@ dwapb_gpio_get_pdata_of(struct device *dev) 
	if (nports == 0)

		return ERR_PTR(-ENODEV);



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

	pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);

	if (!pdata)

		return ERR_PTR(-ENOMEM);



	pdata->properties = kcalloc(nports, sizeof(*pp), GFP_KERNEL);

	if (!pdata->properties) {

		kfree(pdata);

	pdata->properties = devm_kcalloc(dev, nports, sizeof(*pp), GFP_KERNEL);

	if (!pdata->properties)

		return ERR_PTR(-ENOMEM);

	}



	pdata->nports = nports;
@@ -490,8 +488,6 @@ dwapb_gpio_get_pdata_of(struct device *dev) 
		    pp->idx >= DWAPB_MAX_PORTS) {

			dev_err(dev, "missing/invalid port index for %s\n",

				port_np->full_name);

			kfree(pdata->properties);

			kfree(pdata);

			return ERR_PTR(-EINVAL);

		}
@@ -523,15 +519,6 @@ dwapb_gpio_get_pdata_of(struct device *dev) 
	return pdata;

}



static inline void dwapb_free_pdata_of(struct dwapb_platform_data *pdata)

{

	if (!IS_ENABLED(CONFIG_OF_GPIO) || !pdata)

		return;



	kfree(pdata->properties);

	kfree(pdata);

}



static int dwapb_gpio_probe(struct platform_device *pdev)

{

	unsigned int i;
@@ -540,40 +527,32 @@ static int dwapb_gpio_probe(struct platform_device *pdev) 
	int err;

	struct device *dev = &pdev->dev;

	struct dwapb_platform_data *pdata = dev_get_platdata(dev);

	bool is_pdata_alloc = !pdata;



	if (is_pdata_alloc) {

	if (!pdata) {

		pdata = dwapb_gpio_get_pdata_of(dev);

		if (IS_ERR(pdata))

			return PTR_ERR(pdata);

	}



	if (!pdata->nports) {

		err = -ENODEV;

		goto out_err;

	}

	if (!pdata->nports)

		return -ENODEV;



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

	if (!gpio) {

		err = -ENOMEM;

		goto out_err;

	}

	if (!gpio)

		return -ENOMEM;



	gpio->dev = &pdev->dev;

	gpio->nr_ports = pdata->nports;



	gpio->ports = devm_kcalloc(&pdev->dev, gpio->nr_ports,

				   sizeof(*gpio->ports), GFP_KERNEL);

	if (!gpio->ports) {

		err = -ENOMEM;

		goto out_err;

	}

	if (!gpio->ports)

		return -ENOMEM;



	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);

	gpio->regs = devm_ioremap_resource(&pdev->dev, res);

	if (IS_ERR(gpio->regs)) {

		err = PTR_ERR(gpio->regs);

		goto out_err;

	}

	if (IS_ERR(gpio->regs))

		return PTR_ERR(gpio->regs);



	for (i = 0; i < gpio->nr_ports; i++) {

		err = dwapb_gpio_add_port(gpio, &pdata->properties[i], i);
@@ -582,16 +561,12 @@ static int dwapb_gpio_probe(struct platform_device *pdev) 
	}

	platform_set_drvdata(pdev, gpio);



	goto out_err;

	return 0;



out_unregister:

	dwapb_gpio_unregister(gpio);

	dwapb_irq_teardown(gpio);



out_err:

	if (is_pdata_alloc)

		dwapb_free_pdata_of(pdata);



	return err;

}