ARM: OMAP2+: id: cache omap_type value

There is no need to read the register with every invocation of the function,
as the value is constant. Thus, cache the value in a static variable.

Signed-off-by: Tero Kristo <t-kristo@ti.com>

diff --git a/arch/arm/mach-omap2/id.c b/arch/arm/mach-omap2/id.c
index 2a2f4d56e4c85ea599b295a10d09c2bf922bdc79..f8121dbc9d487bc1a85dc0ed091e216d73517ea8 100644 (file)
--- a/arch/arm/mach-omap2/id.c
+++ b/arch/arm/mach-omap2/id.c
@@ -52,7 +52,10 @@ EXPORT_SYMBOL(omap_rev);
 
 int omap_type(void)
 {
-       u32 val = 0;
+       static u32 val = OMAP2_DEVICETYPE_MASK;
+
+       if (val < OMAP2_DEVICETYPE_MASK)
+               return val;
 
        if (cpu_is_omap24xx()) {
                val = omap_ctrl_readl(OMAP24XX_CONTROL_STATUS);