From: David Gibson <david@gibson.dropbear.id.au>
To: Andrew Morton <akpm@osdl.org>, Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Cc: linuxppc-dev@ozlabs.org, linux-kernel@vger.kernel.org,
rtc-linux@googlegroups.com
Subject: rtc-ds1742.c should use resource_size_t for base address
Date: Fri, 14 Sep 2007 15:54:27 +1000 [thread overview]
Message-ID: <20070914055427.GM481@localhost.localdomain> (raw)
Currently the rtc driver, rtc-ds1742.c uses an unsigned long to store
the base mmio address of the NVRAM/RTC. This breaks on systems like
PowerPC 440, which is a 32-bit core with 36-bit physical addresses: IO
on the system, including the RTC, is typically above the 4GB point,
and cannot fit into an unsigned long.
This patch fixes the problem by replacing the unsigned long with a
resource_size_t. Tested on Ebony (PPC440) (with additional patches to
instantiate the ds1742 platform device appropriately).
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Index: working-2.6/drivers/rtc/rtc-ds1742.c
===================================================================
--- working-2.6.orig/drivers/rtc/rtc-ds1742.c 2007-09-14 15:43:31.000000000 +1000
+++ working-2.6/drivers/rtc/rtc-ds1742.c 2007-09-14 15:44:09.000000000 +1000
@@ -55,7 +55,7 @@ struct rtc_plat_data {
void __iomem *ioaddr_rtc;
size_t size_nvram;
size_t size;
- unsigned long baseaddr;
+ resource_size_t baseaddr;
unsigned long last_jiffies;
};
--
David Gibson | I'll have my music baroque, and my code
david AT gibson.dropbear.id.au | minimalist, thank you. NOT _the_ _other_
| _way_ _around_!
http://www.ozlabs.org/~dgibson
next reply other threads:[~2007-09-14 5:54 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-09-14 5:54 David Gibson [this message]
2007-09-14 16:09 ` rtc-ds1742.c should use resource_size_t for base address Atsushi Nemoto
2007-09-14 17:20 ` Josh Boyer
2007-09-15 1:30 ` David Gibson
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