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authorNicolas Ferre <nicolas.ferre@atmel.com>2012-01-18 16:56:36 +0100
committerNicolas Ferre <nicolas.ferre@atmel.com>2012-03-01 13:38:48 +0100
commit298312971b2fe8b922a1a15e0a6f5b4da89677d8 (patch)
tree25a6c8588077badac4d0092e3b81c5df0c8508d1 /drivers/misc
parent986c265729cb798bb8414bd5d6c6006240a1011c (diff)
ARM: at91/tclib: take iomem size from resource
Requesting iomem region and ioremaping is now done using the resource size specified instead of a constant value. Each <SoC>_device.c file is modified accordingly to reflect actual user interface size. Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com> Acked-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Diffstat (limited to 'drivers/misc')
-rw-r--r--drivers/misc/atmel_tclib.c17
1 files changed, 9 insertions, 8 deletions
diff --git a/drivers/misc/atmel_tclib.c b/drivers/misc/atmel_tclib.c
index 4bcfc375973..7a6512a148d 100644
--- a/drivers/misc/atmel_tclib.c
+++ b/drivers/misc/atmel_tclib.c
@@ -9,10 +9,6 @@
#include <linux/slab.h>
#include <linux/export.h>
-/* Number of bytes to reserve for the iomem resource */
-#define ATMEL_TC_IOMEM_SIZE 256
-
-
/*
* This is a thin library to solve the problem of how to portably allocate
* one of the TC blocks. For simplicity, it doesn't currently expect to
@@ -48,6 +44,7 @@ struct atmel_tc *atmel_tc_alloc(unsigned block, const char *name)
struct atmel_tc *tc;
struct platform_device *pdev = NULL;
struct resource *r;
+ size_t size;
spin_lock(&tc_list_lock);
list_for_each_entry(tc, &tc_list, node) {
@@ -61,11 +58,15 @@ struct atmel_tc *atmel_tc_alloc(unsigned block, const char *name)
goto fail;
r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- r = request_mem_region(r->start, ATMEL_TC_IOMEM_SIZE, name);
if (!r)
goto fail;
- tc->regs = ioremap(r->start, ATMEL_TC_IOMEM_SIZE);
+ size = resource_size(r);
+ r = request_mem_region(r->start, size, name);
+ if (!r)
+ goto fail;
+
+ tc->regs = ioremap(r->start, size);
if (!tc->regs)
goto fail_ioremap;
@@ -76,7 +77,7 @@ out:
return tc;
fail_ioremap:
- release_mem_region(r->start, ATMEL_TC_IOMEM_SIZE);
+ release_mem_region(r->start, size);
fail:
tc = NULL;
goto out;
@@ -96,7 +97,7 @@ void atmel_tc_free(struct atmel_tc *tc)
spin_lock(&tc_list_lock);
if (tc->regs) {
iounmap(tc->regs);
- release_mem_region(tc->iomem->start, ATMEL_TC_IOMEM_SIZE);
+ release_mem_region(tc->iomem->start, resource_size(tc->iomem));
tc->regs = NULL;
tc->iomem = NULL;
}