From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from metis.ext.pengutronix.de ([2001:6f8:1178:4:290:27ff:fe1d:cc33]) by canuck.infradead.org with esmtps (Exim 4.76 #1 (Red Hat Linux)) id 1Qj5qb-0006ky-U7 for barebox@lists.infradead.org; Tue, 19 Jul 2011 08:40:23 +0000 From: Sascha Hauer Date: Tue, 19 Jul 2011 10:39:46 +0200 Message-Id: <1311064803-6305-3-git-send-email-s.hauer@pengutronix.de> In-Reply-To: <1311064803-6305-1-git-send-email-s.hauer@pengutronix.de> References: <1311064803-6305-1-git-send-email-s.hauer@pengutronix.de> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: barebox-bounces@lists.infradead.org Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: [PATCH 02/19] device: Add a dev_request_mem_region function To: barebox@lists.infradead.org We might want to add real resource tracking later. Also The first resource may not be a IORESOURCE_MEM at all. For these reasons introduce a wrapper function for driver so that they do not have to fiddle with resources directly. Signed-off-by: Sascha Hauer --- include/driver.h | 14 ++++++++++++++ lib/driver.c | 16 ++++++++++++++++ 2 files changed, 30 insertions(+), 0 deletions(-) diff --git a/include/driver.h b/include/driver.h index ed3df16..0fc254d 100644 --- a/include/driver.h +++ b/include/driver.h @@ -188,6 +188,20 @@ static inline const char *dev_name(const struct device_d *dev) return dev_id(dev); } +/* + * get register base 'num' for a device + */ +void __iomem *dev_get_mem_region(struct device_d *dev, int num); + +/* + * exlusively request register base 'num' for a device + */ +static inline void __iomem *dev_request_mem_region(struct device_d *dev, int num) +{ + /* no resource tracking yet */ + return dev_get_mem_region(dev, num); +} + /* linear list over all available devices */ extern struct list_head device_list; diff --git a/lib/driver.c b/lib/driver.c index 95e42d5..50f065a 100644 --- a/lib/driver.c +++ b/lib/driver.c @@ -233,6 +233,22 @@ int register_driver(struct driver_d *drv) } EXPORT_SYMBOL(register_driver); +void __iomem *dev_get_mem_region(struct device_d *dev, int num) +{ + int i, n = 0; + + for (i = 0; i < dev->num_resources; i++) { + struct resource *res = &dev->resource[i]; + if ((res->flags & IORESOURCE_TYPE_BITS) == IORESOURCE_MEM) { + if (n == num) + return (void __force __iomem *)res->start; + n++; + } + } + + return NULL; +} + int dev_protect(struct device_d *dev, size_t count, unsigned long offset, int prot) { printf("%s: currently broken\n", __func__); -- 1.7.5.4 _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox