[U-Boot] [PATCH] board/b4860qds:Slow MDC clock to comply IEEE specs in PBI config

[U-Boot] [PATCH] board/b4860qds:Slow MDC clock to comply IEEE specs in PBI config

[Prabhakar Kushwaha]

With the default value of MDIO_CLK_DIV generatee MDC is too high and It is
violating the IEEE specs much higher than 2.5Mhz.

Although there is errata(A-006260) for EMI2(MDIO2), but same errata is
been hit on EMI1(MDIO1). unfortunately this errata never hit on B4 rev1.
So reduced the MDIO_CLK_DIV value.

Signed-off-by: Prabhakar Kushwaha <prabhakar@freescale.com>
---
 board/freescale/b4860qds/b4_pbi.cfg |    3 +++
 1 file changed, 3 insertions(+)

diff --git a/board/freescale/b4860qds/b4_pbi.cfg b/board/freescale/b4860qds/b4_pbi.cfg
index 57b726e..05377ba 100644
--- a/board/freescale/b4860qds/b4_pbi.cfg
+++ b/board/freescale/b4860qds/b4_pbi.cfg
@@ -22,6 +22,9 @@
 09110024 00100008
 09110028 00100008
 0911002c 00100008
+#slowing down the MDC clock to make it <= 2.5 MHZ
+094fc030 00008148
+094fd030 00008148
 #Flush PBL data
 09138000 00000000
 091380c0 00000000
-- 
1.7.9.5

[U-Boot] [PATCH] board/b4860qds:Slow MDC clock to comply IEEE specs in PBI config

[York Sun]

On 02/28/2014 12:48 AM, Prabhakar Kushwaha wrote:
> With the default value of MDIO_CLK_DIV generatee MDC is too high and It is
> violating the IEEE specs much higher than 2.5Mhz.
> 
> Although there is errata(A-006260) for EMI2(MDIO2), but same errata is
> been hit on EMI1(MDIO1). unfortunately this errata never hit on B4 rev1.
> So reduced the MDIO_CLK_DIV value.
> 

Please fix the typo and some grammar error in the commit message.
What is about B4 Rev 1? We support rev 2 and later in this u-boot.

York