From: chenhui zhao chenhui.zhao@freescale.com
The erratum NMG_LBC103 is LBIU3 in MPC8548 errata document. Any local bus transaction may fail during LBIU resynchronization process when the clock divider [CLKDIV] is changing. Ensure there is no transaction on the local bus for at least 100 microseconds after changing clock divider LCRR[CLKDIV].
Refer to the erratum LBIU3 of mpc8548.
Signed-off-by: Zhao Chenhui chenhui.zhao@freescale.com --- arch/powerpc/cpu/mpc85xx/cmd_errata.c | 3 +++ arch/powerpc/cpu/mpc85xx/cpu_init.c | 3 +++ arch/powerpc/include/asm/config_mpc85xx.h | 1 + 3 files changed, 7 insertions(+), 0 deletions(-)
diff --git a/arch/powerpc/cpu/mpc85xx/cmd_errata.c b/arch/powerpc/cpu/mpc85xx/cmd_errata.c index 2c468bd..6011f66 100644 --- a/arch/powerpc/cpu/mpc85xx/cmd_errata.c +++ b/arch/powerpc/cpu/mpc85xx/cmd_errata.c @@ -104,6 +104,9 @@ static int do_errata(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) if ((SVR_MAJ(svr) == 1) || IS_SVR_REV(svr, 2, 0)) puts("Work-around for Erratum NMG ETSEC129 enabled\n"); #endif +#ifdef CONFIG_SYS_FSL_ERRATUM_NMG_LBC103 + puts("Work-around for Erratum NMG_LBC103 enabled\n"); +#endif return 0; }
diff --git a/arch/powerpc/cpu/mpc85xx/cpu_init.c b/arch/powerpc/cpu/mpc85xx/cpu_init.c index 27f836c..d9e9069 100644 --- a/arch/powerpc/cpu/mpc85xx/cpu_init.c +++ b/arch/powerpc/cpu/mpc85xx/cpu_init.c @@ -454,6 +454,9 @@ skip_l2: clrsetbits_be32(&lbc->lcrr, LCRR_CLKDIV, CONFIG_SYS_LBC_LCRR); __raw_readl(&lbc->lcrr); isync(); +#ifdef CONFIG_SYS_FSL_ERRATUM_NMG_LBC103 + udelay(100); +#endif #endif
#ifdef CONFIG_SYS_FSL_USB1_PHY_ENABLE diff --git a/arch/powerpc/include/asm/config_mpc85xx.h b/arch/powerpc/include/asm/config_mpc85xx.h index 3e32778..e961e44 100644 --- a/arch/powerpc/include/asm/config_mpc85xx.h +++ b/arch/powerpc/include/asm/config_mpc85xx.h @@ -64,6 +64,7 @@ #define CONFIG_SYS_CCSRBAR_DEFAULT 0xff700000 #define CONFIG_SYS_FSL_ERRATUM_NMG_DDR120 #define CONFIG_SYS_FSL_ERRATUM_NMG_ETSEC129 +#define CONFIG_SYS_FSL_ERRATUM_NMG_LBC103
#elif defined(CONFIG_MPC8555) #define CONFIG_MAX_CPUS 1