diff options
| author | Kumar Gala | 2011-01-13 02:58:23 -0600 |
|---|---|---|
| committer | Kumar Gala | 2011-01-14 01:32:22 -0600 |
| commit | f133796da8ec87ccbafc9c492636def619d99401 (patch) | |
| tree | dfe191877ff5f37f22a28496b911f6fd8863c3ef /arch/powerpc | |
| parent | 868da5936e40b8685c813c1eb31eed629eaae295 (diff) | |
powerpc/85xx: Add the workaround for erratum ELBC-A001 (enable on P4080)
Simultaneous FCM and GPCM or UPM operation may erroneously trigger bus
monitor timeout. Set timeout to maximum to avoid.
Based on a patch from Lan Chunhe <b25806@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc')
| -rw-r--r-- | arch/powerpc/cpu/mpc85xx/cmd_errata.c | 3 | ||||
| -rw-r--r-- | arch/powerpc/cpu/mpc8xxx/fsl_lbc.c | 7 | ||||
| -rw-r--r-- | arch/powerpc/include/asm/fsl_lbc.h | 4 |
3 files changed, 12 insertions, 2 deletions
diff --git a/arch/powerpc/cpu/mpc85xx/cmd_errata.c b/arch/powerpc/cpu/mpc85xx/cmd_errata.c index bf70d2d895c..7dfa596f03d 100644 --- a/arch/powerpc/cpu/mpc85xx/cmd_errata.c +++ b/arch/powerpc/cpu/mpc85xx/cmd_errata.c @@ -65,6 +65,9 @@ static int do_errata(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) #ifdef CONFIG_SYS_FSL_ERRATUM_CPC_A003 puts("Work-around for Erratum CPC-A003 enabled\n"); #endif +#ifdef CONFIG_SYS_FSL_ERRATUM_ELBC_A001 + puts("Work-around for Erratum ELBC-A001 enabled\n"); +#endif return 0; } diff --git a/arch/powerpc/cpu/mpc8xxx/fsl_lbc.c b/arch/powerpc/cpu/mpc8xxx/fsl_lbc.c index 6f401e7509d..7598ebf4574 100644 --- a/arch/powerpc/cpu/mpc8xxx/fsl_lbc.c +++ b/arch/powerpc/cpu/mpc8xxx/fsl_lbc.c @@ -1,5 +1,5 @@ /* - * Copyright 2010 Freescale Semiconductor, Inc. + * Copyright 2010-2011 Freescale Semiconductor, Inc. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License @@ -34,6 +34,11 @@ void init_early_memctl_regs(void) { uint init_br1 = 1; +#ifdef CONFIG_SYS_FSL_ERRATUM_ELBC_A001 + /* Set the local bus monitor timeout value to the maximum */ + clrsetbits_be32(&(LBC_BASE_ADDR)->lbcr, LBCR_BMT|LBCR_BMTPS, 0xf); +#endif + #ifdef CONFIG_MPC85xx /* if cs1 is already set via debugger, leave cs0/cs1 alone */ if (get_lbc_br(1) & BR_V) diff --git a/arch/powerpc/include/asm/fsl_lbc.h b/arch/powerpc/include/asm/fsl_lbc.h index c5047326ae4..8695a6269af 100644 --- a/arch/powerpc/include/asm/fsl_lbc.h +++ b/arch/powerpc/include/asm/fsl_lbc.h @@ -1,5 +1,5 @@ /* - * Copyright (C) 2004-2008,2010 Freescale Semiconductor, Inc. + * Copyright (C) 2004-2008,2010-2011 Freescale Semiconductor, Inc. * * See file CREDITS for list of people who contributed to this * project. @@ -295,6 +295,8 @@ void lbc_sdram_init(void); #define LBCR_EPAR_SHIFT 16 #define LBCR_BMT 0x0000FF00 #define LBCR_BMT_SHIFT 8 +#define LBCR_BMTPS 0x0000000F +#define LBCR_BMTPS_SHIFT 0 /* LCRR - Clock Ratio Register */ |