From ae026ffd1e1a3f98b13c121acf5a677a5925a0e1 Mon Sep 17 00:00:00 2001
From: Roy Zang <tie-fei.zang@freescale.com>
Date: Fri, 7 Jan 2011 00:24:27 -0600
Subject: [PATCH] fsl_esdhc: Add the workaround for erratum ESDHC136 (enable on
P4080)
False multi-bit ECC errors will be reported by the eSDHC buffer which
can trigger a reset request.
We disable all ECC error checking on SDHC.
Signed-off-by: Roy Zang <tie-fei.zang@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
---
arch/powerpc/cpu/mpc85xx/cmd_errata.c | 3 +++
arch/powerpc/cpu/mpc85xx/cpu_init.c | 8 ++++++++
include/configs/P4080DS.h | 1 +
3 files changed, 12 insertions(+)
diff --git a/arch/powerpc/cpu/mpc85xx/cmd_errata.c b/arch/powerpc/cpu/mpc85xx/cmd_errata.c
index d5c34c867f7..4e2cb4a6401 100644
--- a/arch/powerpc/cpu/mpc85xx/cmd_errata.c
+++ b/arch/powerpc/cpu/mpc85xx/cmd_errata.c
@@ -55,6 +55,9 @@ static int do_errata(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
#endif
#if defined(CONFIG_SYS_FSL_ERRATUM_ESDHC135)
puts("Work-around for Erratum ESDHC135 enabled\n");
+#endif
+#if defined(CONFIG_SYS_FSL_ERRATUM_ESDHC136)
+ puts("Work-around for Erratum ESDHC136 enabled\n");
#endif
return 0;
}
diff --git a/arch/powerpc/cpu/mpc85xx/cpu_init.c b/arch/powerpc/cpu/mpc85xx/cpu_init.c
index 1d016c4d04b..354b2223147 100644
--- a/arch/powerpc/cpu/mpc85xx/cpu_init.c
+++ b/arch/powerpc/cpu/mpc85xx/cpu_init.c
@@ -394,6 +394,14 @@ int cpu_init_r(void)
setup_mp();
#endif
+#ifdef CONFIG_SYS_FSL_ERRATUM_ESDHC136
+ {
+ void *p;
+ p = (void *)CONFIG_SYS_DCSRBAR + 0x20520;
+ setbits_be32(p, 1 << (31 - 14));
+ }
+#endif
+
#ifdef CONFIG_SYS_LBC_LCRR
/*
* Modify the CLKDIV field of LCRR register to improve the writing
diff --git a/include/configs/P4080DS.h b/include/configs/P4080DS.h
index a15dd761b8f..4dd7faa1bb1 100644
--- a/include/configs/P4080DS.h
+++ b/include/configs/P4080DS.h
@@ -37,6 +37,7 @@
#define CONFIG_SYS_FSL_ERRATUM_ESDHC111
#define CONFIG_SYS_FSL_ERRATUM_ESDHC135
+#define CONFIG_SYS_FSL_ERRATUM_ESDHC136
#define CONFIG_SYS_P4080_ERRATUM_CPU22
#define CONFIG_SYS_P4080_ERRATUM_SERDES8
--
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