[ARM] 5544/1: Trust PrimeCell resource sizes

I found the PrimeCell/AMBA Bus drivers distrusting the resource
passed in as part of the struct amba_device abstraction. This
patch removes all hard coded resource sizes found in the PrimeCell
drivers and move the responsibility of this definition back to
the platform/board device definition, which already exist and
appear to be correct for all in-tree users of these drivers.
We do this using the resource_size() inline function which was
also replicated in the only driver using the resource size, so
that has been changed too. The KMI_SIZE was left in kmi.h in case
someone likes it. Test-compiled against Versatile and Integrator
defconfigs, seems to work but I don't posess these boards and
cannot test them.

Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

2 files changed, 2 insertions, 3 deletions

diff --git a/drivers/rtc/rtc-pl030.c b/drivers/rtc/rtc-pl030.c
index aaf1f75..457231b 100644
--- a/drivers/rtc/rtc-pl030.c
+++ b/drivers/rtc/rtc-pl030.c
@@ -117,7 +117,7 @@ static int pl030_probe(struct amba_device *dev, struct amba_id *id)
 		goto err_rtc;
 	}
 
-	rtc->base = ioremap(dev->res.start, SZ_4K);
+	rtc->base = ioremap(dev->res.start, resource_size(&dev->res));
 	if (!rtc->base) {
 		ret = -ENOMEM;
 		goto err_map;
diff --git a/drivers/rtc/rtc-pl031.c b/drivers/rtc/rtc-pl031.c
index 451fc13..f41873f 100644
--- a/drivers/rtc/rtc-pl031.c
+++ b/drivers/rtc/rtc-pl031.c
@@ -142,8 +142,7 @@ static int pl031_probe(struct amba_device *adev, struct amba_id *id)
 		goto out;
 	}
 
-	ldata->base = ioremap(adev->res.start,
-			      adev->res.end - adev->res.start + 1);
+	ldata->base = ioremap(adev->res.start, resource_size(&adev->res));
 	if (!ldata->base) {
 		ret = -ENOMEM;
 		goto out_no_remap;