i.MX: Fix i.MX31 default/reset configuration

Linux on i.MX31/KZM is expecting the CCM to use the CKIH ref clock
instead of the CKIL plus the FPM multiplier.

We change the CCMR reg reset value to match linux expected config.

This allows the CCM to provide a 39MHz clk (as expected by linux)
instead of the actual 50MHz.

With this change the "sleep 60" command on linux is time accurate
with "real world time".

Signed-off-by: Jean-Christophe Dubois <jcd@tribudubois.net>
Reviewed-by: Peter Crosthwaite <crosthwaite.peter@gmail.com>
Message-id: 6dc5bc4e0a450b20cecdb2991112e7281b653345.1449528242.git.jcd@tribudubois.net
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

diff --git a/hw/misc/imx_ccm.c b/hw/misc/imx_ccm.c
index 4cc2bbc..500dda5 100644 (file)
--- a/hw/misc/imx_ccm.c
+++ b/hw/misc/imx_ccm.c
@@ -123,7 +123,7 @@ static void imx_ccm_reset(DeviceState *dev)
 {
     IMXCCMState *s = IMX_CCM(dev);
 
-    s->ccmr = 0x074b0b7b;
+    s->ccmr = 0x074b0b7d;
     s->pdr0 = 0xff870b48;
     s->pdr1 = 0x49fcfe7f;
     s->mpctl = PLL_PD(1) | PLL_MFD(0) | PLL_MFI(6) | PLL_MFN(0);