ARM: mach-shmobile: sh73a0 CPGA fix for PLL CFG bit

PLL1 and PLL2 in the sh73a0 CPGA has a CFG bit that
must be taken into account to correctly calculate the
frequency.

Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

diff --git a/arch/arm/mach-shmobile/clock-sh73a0.c b/arch/arm/mach-shmobile/clock-sh73a0.c
index 08fb878..bcaf58a 100644 (file)
--- a/arch/arm/mach-shmobile/clock-sh73a0.c
+++ b/arch/arm/mach-shmobile/clock-sh73a0.c
@@ -118,8 +118,16 @@ static unsigned long pll_recalc(struct clk *clk)
 {
        unsigned long mult = 1;
 
-       if (__raw_readl(PLLECR) & (1 << clk->enable_bit))
+       if (__raw_readl(PLLECR) & (1 << clk->enable_bit)) {
                mult = (((__raw_readl(clk->enable_reg) >> 24) & 0x3f) + 1);
+               /* handle CFG bit for PLL1 and PLL2 */
+               switch (clk->enable_bit) {
+               case 1:
+               case 2:
+                       if (__raw_readl(clk->enable_reg) & (1 << 20))
+                               mult *= 2;
+               }
+       }
 
        return clk->parent->rate * mult;
 }