powerpc/44x: AMCC PPC460GT/EX PCI-E de-emphasis adjustment fix

During recent tests with PCI-E , it has been found the
DRV + De-Emphasis values are not optimum. These new values
are tested thouroughly.

Signed-off-by: Tirumala R Marri <tmarri@amcc.com>
Signed-off-by: Feng Kan fkan@amcc.com
Acked-by: Stefan Roese <sr@denx.de>
Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>

diff --git a/arch/powerpc/sysdev/ppc4xx_pci.c b/arch/powerpc/sysdev/ppc4xx_pci.c
index fb368df..d5c345d 100644 (file)
--- a/arch/powerpc/sysdev/ppc4xx_pci.c
+++ b/arch/powerpc/sysdev/ppc4xx_pci.c
@@ -810,7 +810,7 @@ static int ppc460ex_pciex_init_port_hw(struct ppc4xx_pciex_port *port)
        switch (port->index) {
        case 0:
                mtdcri(SDR0, PESDR0_460EX_L0CDRCTL, 0x00003230);
-               mtdcri(SDR0, PESDR0_460EX_L0DRV, 0x00000136);
+               mtdcri(SDR0, PESDR0_460EX_L0DRV, 0x00000130);
                mtdcri(SDR0, PESDR0_460EX_L0CLK, 0x00000006);
 
                mtdcri(SDR0, PESDR0_460EX_PHY_CTL_RST,0x10000000);
@@ -821,10 +821,10 @@ static int ppc460ex_pciex_init_port_hw(struct ppc4xx_pciex_port *port)
                mtdcri(SDR0, PESDR1_460EX_L1CDRCTL, 0x00003230);
                mtdcri(SDR0, PESDR1_460EX_L2CDRCTL, 0x00003230);
                mtdcri(SDR0, PESDR1_460EX_L3CDRCTL, 0x00003230);
-               mtdcri(SDR0, PESDR1_460EX_L0DRV, 0x00000136);
-               mtdcri(SDR0, PESDR1_460EX_L1DRV, 0x00000136);
-               mtdcri(SDR0, PESDR1_460EX_L2DRV, 0x00000136);
-               mtdcri(SDR0, PESDR1_460EX_L3DRV, 0x00000136);
+               mtdcri(SDR0, PESDR1_460EX_L0DRV, 0x00000130);
+               mtdcri(SDR0, PESDR1_460EX_L1DRV, 0x00000130);
+               mtdcri(SDR0, PESDR1_460EX_L2DRV, 0x00000130);
+               mtdcri(SDR0, PESDR1_460EX_L3DRV, 0x00000130);
                mtdcri(SDR0, PESDR1_460EX_L0CLK, 0x00000006);
                mtdcri(SDR0, PESDR1_460EX_L1CLK, 0x00000006);
                mtdcri(SDR0, PESDR1_460EX_L2CLK, 0x00000006);