[U-Boot] [PATCH] mx6: clock: Fix the calculation of PLL_ENET frequency

[Fabio Estevam]

From: Fabio Estevam <fabio.estevam at freescale.com>

According to the mx6 quad reference manual, the DIV_SELECT field of register
CCM_ANALOG_PLL_ENETn has the following meaning:

"Controls the frequency of the ethernet reference clock.
- 00 - 25MHz
- 01 - 50MHz
- 10 - 100MHz
- 11 - 125MHz"

Current logic does not handle the 25MHz case correctly, so fix it.

Signed-off-by: Rabeeh Khoury <rabeeh at solid-run.com>
Signed-off-by: Fabio Estevam <fabio.estevam at freescale.com>
---
 arch/arm/cpu/armv7/mx6/clock.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/arch/arm/cpu/armv7/mx6/clock.c b/arch/arm/cpu/armv7/mx6/clock.c
index 873d9d0..eab8596 100644
--- a/arch/arm/cpu/armv7/mx6/clock.c
+++ b/arch/arm/cpu/armv7/mx6/clock.c
@@ -94,7 +94,10 @@ static u32 decode_pll(enum pll_clocks pll, u32 infreq)
 		div = __raw_readl(&imx_ccm->analog_pll_enet);
 		div &= BM_ANADIG_PLL_ENET_DIV_SELECT;
 
-		return (div == 3 ? 125000000 : 25000000 * (div << 1));
+		if (div == 0)
+			return 25000000;
+		else
+			return (div == 3 ? 125000000 : 25000000 * (div << 1));
 	default:
 		return 0;
 	}
-- 
1.8.1.2