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authorPaul Parsons <lost.distance@yahoo.com>2012-03-07 18:12:08 +0400
committerDavid Woodhouse <David.Woodhouse@intel.com>2012-03-27 03:52:28 +0400
commit876fe76d793d03077eb61ba3afab4a383f46c554 (patch)
treefb7d98bd746ebd1c3c5919f10a998e8f2dbd9e8b /arch/arm/mach-omap1/flash.c
parente7d9377e0440c25805dcc5b0af189a87beb69f5e (diff)
downloadlinux-876fe76d793d03077eb61ba3afab4a383f46c554.tar.xz
mtd: maps: physmap: Add reference counter to set_vpp()
This patch is part of a set which fixes unnecessary flash erase and write errors resulting from the MTD CFI driver turning off vpp while an erase is in progress. This patch allows physmap_set_vpp() calls to be nested by adding a reference counter. omap1_set_vpp() already used a reference counter. Since it is called from physmap_set_vpp(), omap1_set_vpp() can now be simplified. simtec_nor_vpp() already disabled hard interrupts. Since it is called from physmap_set_vpp(), simtec_nor_vpp() can now be simplified. Signed-off-by: Paul Parsons <lost.distance@yahoo.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Diffstat (limited to 'arch/arm/mach-omap1/flash.c')
-rw-r--r--arch/arm/mach-omap1/flash.c20
1 files changed, 6 insertions, 14 deletions
diff --git a/arch/arm/mach-omap1/flash.c b/arch/arm/mach-omap1/flash.c
index 1749cb37dda0..4665bfcd2ce9 100644
--- a/arch/arm/mach-omap1/flash.c
+++ b/arch/arm/mach-omap1/flash.c
@@ -15,20 +15,12 @@
void omap1_set_vpp(struct platform_device *pdev, int enable)
{
- static int count;
u32 l;
- if (enable) {
- if (count++ == 0) {
- l = omap_readl(EMIFS_CONFIG);
- l |= OMAP_EMIFS_CONFIG_WP;
- omap_writel(l, EMIFS_CONFIG);
- }
- } else {
- if (count && (--count == 0)) {
- l = omap_readl(EMIFS_CONFIG);
- l &= ~OMAP_EMIFS_CONFIG_WP;
- omap_writel(l, EMIFS_CONFIG);
- }
- }
+ l = omap_readl(EMIFS_CONFIG);
+ if (enable)
+ l |= OMAP_EMIFS_CONFIG_WP;
+ else
+ l &= ~OMAP_EMIFS_CONFIG_WP;
+ omap_writel(l, EMIFS_CONFIG);
}