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| author | Yuanquan Chen <B41889@freescale.com> | 2012-11-26 23:49:45 +0000 |
|---|---|---|
| committer | Andy Fleming <afleming@freescale.com> | 2012-11-27 18:28:07 -0600 |
| commit | c0a4e6b889a702cc2c8375619ce7b093f6b3b1de (patch) | |
| tree | c707baafbb5971ca6d826e4056fc5969e1f00169 /arch/powerpc | |
| parent | 9760b274df8fdc5a6d124f3192535ebe281a78a6 (diff) | |
| download | u-boot-imx-c0a4e6b889a702cc2c8375619ce7b093f6b3b1de.zip u-boot-imx-c0a4e6b889a702cc2c8375619ce7b093f6b3b1de.tar.gz u-boot-imx-c0a4e6b889a702cc2c8375619ce7b093f6b3b1de.tar.bz2 | |
powerpc/p4080ds: fix PCI-e x8 link training down failure
Due to SerDes configuration error, if we set the PCI-e controller link width
as x8 in RCW and add a narrower width(such as x4, x2 or x1) PCI-e device to
PCI-e slot, it fails to train down to the PCI-e device's link width. According
to p4080ds errata PCIe-A003, we reset the PCI-e controller link width to x4 in
u-boot. Then it can train down to x2 or x1 width to make the PCI-e link between
RC and EP.
Signed-off-by: Yuanquan Chen <B41889@freescale.com>
Signed-off-by: Andy Fleming <afleming@freescale.com>
Diffstat (limited to 'arch/powerpc')
| -rw-r--r-- | arch/powerpc/cpu/mpc85xx/cmd_errata.c | 3 | ||||
| -rw-r--r-- | arch/powerpc/include/asm/config_mpc85xx.h | 1 |
2 files changed, 4 insertions, 0 deletions
diff --git a/arch/powerpc/cpu/mpc85xx/cmd_errata.c b/arch/powerpc/cpu/mpc85xx/cmd_errata.c index 7d38e1c..e5ecf5d 100644 --- a/arch/powerpc/cpu/mpc85xx/cmd_errata.c +++ b/arch/powerpc/cpu/mpc85xx/cmd_errata.c @@ -248,6 +248,9 @@ static int do_errata(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) /* This work-around is implemented in PBI, so just check for it */ check_erratum_a4580(svr); #endif +#ifdef CONFIG_SYS_P4080_ERRATUM_PCIE_A003 + puts("Work-around for Erratum PCIe-A003 enabled\n"); +#endif return 0; } diff --git a/arch/powerpc/include/asm/config_mpc85xx.h b/arch/powerpc/include/asm/config_mpc85xx.h index 965d431..0b9638b 100644 --- a/arch/powerpc/include/asm/config_mpc85xx.h +++ b/arch/powerpc/include/asm/config_mpc85xx.h @@ -421,6 +421,7 @@ #define CONFIG_SYS_FSL_ERRATUM_SRIO_A004034 #define CONFIG_SYS_FSL_ERRATUM_A004849 #define CONFIG_SYS_FSL_ERRATUM_A004580 +#define CONFIG_SYS_P4080_ERRATUM_PCIE_A003 #elif defined(CONFIG_PPC_P5020) /* also supports P5010 */ #define CONFIG_SYS_PPC64 /* 64-bit core */ |