Re: [PATCH 1/3] platform: add common resource requesting and mapping helper

Grant Likely
2012-01-31T20:35:40Z

On Tue, Jan 31, 2012 at 06:00:00PM +0800, Barry Song wrote:
> From: Barry Song <Baohua.Song@csr.com>
>
> this patch helps to move the common pattern from
>
> "
> res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> if (!res) {
> ret = -ENODEV;
> goto err;
> }
>
> base = devm_request_and_ioremap(&dev->dev, mem_res);
> if (!base) {
> ret = -ENODEV;
> goto err;
> }
> "
>
> to
>
> "
> base = platform_devm_request_and_ioremap(pdev, 0);
> if (!base) {
> ret = -ENODEV;
> goto err;
> }
> "
>
> Signed-off-by: Barry Song <Baohua.Song@csr.com>
> Cc: Grant Likely <grant.likely@secretlab.ca>
> Cc: Linus Walleij <linus.walleij@linaro.org>
> Cc: Erik Gilling <konkers@google.com>
> Cc: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
> Cc: David Woodhouse <dwmw2@infradead.org>

Acked-by: Grant Likely <grant.likely@secretlab.ca>

> ---
> drivers/base/platform.c | 19 +++++++++++++++++++
> include/linux/platform_device.h | 1 +
> 2 files changed, 20 insertions(+), 0 deletions(-)
>
> diff --git a/drivers/base/platform.c b/drivers/base/platform.c
> index f0c605e..39ca0ab 100644
> --- a/drivers/base/platform.c
> +++ b/drivers/base/platform.c
> @@ -72,6 +72,25 @@ struct resource *platform_get_resource(struct platform_device *dev,
> EXPORT_SYMBOL_GPL(platform_get_resource);
>
> /**
> + * platform_devm_request_and_ioremap() - get resource, check, request region,
> + * and ioremap resource
> + * @dev: platform device
> + * @num: IOMEM resource index
> + */
> +void __iomem *platform_devm_request_and_ioremap(struct platform_device *dev,
> + unsigned int num)
> +{
> + struct resource *res;
> +
> + res = platform_get_resource(dev, IORESOURCE_MEM, num);
> + if (!res)
> + return NULL;
> +
> + return devm_request_and_ioremap(&dev->dev, res);
> +}
> +EXPORT_SYMBOL_GPL(platform_devm_request_and_ioremap);
> +
> +/**
> * platform_get_irq - get an IRQ for a device
> * @dev: platform device
> * @num: IRQ number index
> diff --git a/include/linux/platform_device.h b/include/linux/platform_device.h
> index 60e9994..768c0d7 100644
> --- a/include/linux/platform_device.h
> +++ b/include/linux/platform_device.h
> @@ -44,6 +44,7 @@ extern struct device platform_bus;
>
> extern void arch_setup_pdev_archdata(struct platform_device *);
> extern struct resource *platform_get_resource(struct platform_device *, unsigned int, unsigned int);
> +extern void __iomem *platform_devm_request_and_ioremap(struct platform_device *, unsigned int);
> extern int platform_get_irq(struct platform_device *, unsigned int);
> extern struct resource *platform_get_resource_byname(struct platform_device *, unsigned int, const char *);
> extern int platform_get_irq_byname(struct platform_device *, const char *);
> --
> 1.7.1
>
>
>
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