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Date: Sat, 22 Dec 2012 10:09:41 +0000
From: Grant Likely <grant.likely@...retlab.ca>
To: David Cohen <david.a.cohen@...el.com>
Cc: linux-kernel@...r.kernel.org, alan@...ux.intel.com,
David Cohen <david.a.cohen@...el.com>
Subject: Re: [PATCH v2 1/2] gpio-langwell: cleanup driver
On Thu, 20 Dec 2012 14:45:51 -0800, David Cohen <david.a.cohen@...el.com> wrote:
> This patch cleans up cosmetic issues, remove useless functions and add
> to_lnw_priv() macro to replace many usages of container_of().
>
> Change-Id: I70a8fadd20a42493271d91633739bdddff19c8d8
> Signed-off-by: David Cohen <david.a.cohen@...el.com>
> ---
> drivers/gpio/gpio-langwell.c | 51 ++++++++++++++----------------------------
> 1 file changed, 17 insertions(+), 34 deletions(-)
Applied, thanks.
BTW, please try not to include "Change-Id:" tags in patches sent to the
list. It's just something that I have to trim out when I apply.
Thanks,
g.
>
> diff --git a/drivers/gpio/gpio-langwell.c b/drivers/gpio/gpio-langwell.c
> index 9b9d12e..2be69fe 100644
> --- a/drivers/gpio/gpio-langwell.c
> +++ b/drivers/gpio/gpio-langwell.c
> @@ -71,10 +71,12 @@ struct lnw_gpio {
> struct irq_domain *domain;
> };
>
> +#define to_lnw_priv(chip) container_of(chip, struct lnw_gpio, chip)
> +
> static void __iomem *gpio_reg(struct gpio_chip *chip, unsigned offset,
> enum GPIO_REG reg_type)
> {
> - struct lnw_gpio *lnw = container_of(chip, struct lnw_gpio, chip);
> + struct lnw_gpio *lnw = to_lnw_priv(chip);
> unsigned nreg = chip->ngpio / 32;
> u8 reg = offset / 32;
> void __iomem *ptr;
> @@ -86,7 +88,7 @@ static void __iomem *gpio_reg(struct gpio_chip *chip, unsigned offset,
> static void __iomem *gpio_reg_2bit(struct gpio_chip *chip, unsigned offset,
> enum GPIO_REG reg_type)
> {
> - struct lnw_gpio *lnw = container_of(chip, struct lnw_gpio, chip);
> + struct lnw_gpio *lnw = to_lnw_priv(chip);
> unsigned nreg = chip->ngpio / 32;
> u8 reg = offset / 16;
> void __iomem *ptr;
> @@ -130,7 +132,7 @@ static void lnw_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
>
> static int lnw_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
> {
> - struct lnw_gpio *lnw = container_of(chip, struct lnw_gpio, chip);
> + struct lnw_gpio *lnw = to_lnw_priv(chip);
> void __iomem *gpdr = gpio_reg(chip, offset, GPDR);
> u32 value;
> unsigned long flags;
> @@ -153,7 +155,7 @@ static int lnw_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
> static int lnw_gpio_direction_output(struct gpio_chip *chip,
> unsigned offset, int value)
> {
> - struct lnw_gpio *lnw = container_of(chip, struct lnw_gpio, chip);
> + struct lnw_gpio *lnw = to_lnw_priv(chip);
> void __iomem *gpdr = gpio_reg(chip, offset, GPDR);
> unsigned long flags;
>
> @@ -176,7 +178,7 @@ static int lnw_gpio_direction_output(struct gpio_chip *chip,
>
> static int lnw_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
> {
> - struct lnw_gpio *lnw = container_of(chip, struct lnw_gpio, chip);
> + struct lnw_gpio *lnw = to_lnw_priv(chip);
> return irq_create_mapping(lnw->domain, offset);
> }
>
> @@ -301,17 +303,6 @@ static const struct irq_domain_ops lnw_gpio_irq_ops = {
> .xlate = irq_domain_xlate_twocell,
> };
>
> -#ifdef CONFIG_PM
> -static int lnw_gpio_runtime_resume(struct device *dev)
> -{
> - return 0;
> -}
> -
> -static int lnw_gpio_runtime_suspend(struct device *dev)
> -{
> - return 0;
> -}
> -
> static int lnw_gpio_runtime_idle(struct device *dev)
> {
> int err = pm_schedule_suspend(dev, 500);
> @@ -322,16 +313,8 @@ static int lnw_gpio_runtime_idle(struct device *dev)
> return -EBUSY;
> }
>
> -#else
> -#define lnw_gpio_runtime_suspend NULL
> -#define lnw_gpio_runtime_resume NULL
> -#define lnw_gpio_runtime_idle NULL
> -#endif
> -
> static const struct dev_pm_ops lnw_gpio_pm_ops = {
> - .runtime_suspend = lnw_gpio_runtime_suspend,
> - .runtime_resume = lnw_gpio_runtime_resume,
> - .runtime_idle = lnw_gpio_runtime_idle,
> + SET_RUNTIME_PM_OPS(NULL, NULL, lnw_gpio_runtime_idle)
> };
>
> static int __devinit lnw_gpio_probe(struct pci_dev *pdev,
> @@ -351,7 +334,7 @@ static int __devinit lnw_gpio_probe(struct pci_dev *pdev,
> retval = pci_request_regions(pdev, "langwell_gpio");
> if (retval) {
> dev_err(&pdev->dev, "error requesting resources\n");
> - goto err2;
> + goto err_pci_req_region;
> }
> /* get the gpio_base from bar1 */
> start = pci_resource_start(pdev, 1);
> @@ -360,7 +343,7 @@ static int __devinit lnw_gpio_probe(struct pci_dev *pdev,
> if (!base) {
> dev_err(&pdev->dev, "error mapping bar1\n");
> retval = -EFAULT;
> - goto err3;
> + goto err_ioremap;
> }
> gpio_base = *((u32 *)base + 1);
> /* release the IO mapping, since we already get the info from bar1 */
> @@ -372,21 +355,21 @@ static int __devinit lnw_gpio_probe(struct pci_dev *pdev,
> if (!base) {
> dev_err(&pdev->dev, "error mapping bar0\n");
> retval = -EFAULT;
> - goto err3;
> + goto err_ioremap;
> }
>
> - lnw = devm_kzalloc(&pdev->dev, sizeof(struct lnw_gpio), GFP_KERNEL);
> + lnw = devm_kzalloc(&pdev->dev, sizeof(*lnw), GFP_KERNEL);
> if (!lnw) {
> dev_err(&pdev->dev, "can't allocate langwell_gpio chip data\n");
> retval = -ENOMEM;
> - goto err3;
> + goto err_ioremap;
> }
>
> lnw->domain = irq_domain_add_linear(pdev->dev.of_node, ngpio,
> &lnw_gpio_irq_ops, lnw);
> if (!lnw->domain) {
> retval = -ENOMEM;
> - goto err3;
> + goto err_ioremap;
> }
>
> lnw->reg_base = base;
> @@ -405,7 +388,7 @@ static int __devinit lnw_gpio_probe(struct pci_dev *pdev,
> retval = gpiochip_add(&lnw->chip);
> if (retval) {
> dev_err(&pdev->dev, "langwell gpiochip_add error %d\n", retval);
> - goto err3;
> + goto err_ioremap;
> }
>
> lnw_irq_init_hw(lnw);
> @@ -420,9 +403,9 @@ static int __devinit lnw_gpio_probe(struct pci_dev *pdev,
>
> return 0;
>
> -err3:
> +err_ioremap:
> pci_release_regions(pdev);
> -err2:
> +err_pci_req_region:
> pci_disable_device(pdev);
> return retval;
> }
> --
> 1.7.10.4
>
--
Grant Likely, B.Sc, P.Eng.
Secret Lab Technologies, Ltd.
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