From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from cluster-g.mailcontrol.com ([208.87.233.190]) by merlin.infradead.org with esmtps (Exim 4.76 #1 (Red Hat Linux)) id 1RsAWN-0000ic-7v for linux-mtd@lists.infradead.org; Tue, 31 Jan 2012 10:01:05 +0000 Received: from rly28g.srv.mailcontrol.com (localhost.localdomain [127.0.0.1]) by rly28g.srv.mailcontrol.com (MailControl) with ESMTP id q0VA0rqb013989 for ; Tue, 31 Jan 2012 10:01:00 GMT Received: from localhost.localdomain (localhost.localdomain [127.0.0.1]) by rly28g.srv.mailcontrol.com (MailControl) id q0VA0TRA013239 for ; Tue, 31 Jan 2012 10:00:29 GMT From: Barry Song To: Greg Kroah-Hartman , Subject: [PATCH 1/3] platform: add common resource requesting and mapping helper Date: Tue, 31 Jan 2012 18:00:00 +0800 Message-ID: <1328004002-24646-2-git-send-email-Barry.Song@csr.com> In-Reply-To: <1328004002-24646-1-git-send-email-Barry.Song@csr.com> References: <1328004002-24646-1-git-send-email-Barry.Song@csr.com> MIME-Version: 1.0 Content-Type: text/plain Cc: Linus Walleij , workgroup.linux@csr.com, Grant Likely , linux-mtd@lists.infradead.org, Atsushi Nemoto , Barry Song , David Woodhouse , Erik Gilling List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , From: Barry Song 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 Cc: Grant Likely Cc: Linus Walleij Cc: Erik Gilling Cc: Atsushi Nemoto Cc: David Woodhouse --- 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 Member of the CSR plc group of companies. CSR plc registered in England and Wales, registered number 4187346, registered office Churchill House, Cambridge Business Park, Cowley Road, Cambridge, CB4 0WZ, United Kingdom More information can be found at www.csr.com. Follow CSR on Twitter at http://twitter.com/CSR_PLC and read our blog at www.csr.com/blog