From 7d6d9ba9d0cb0bb2fefc4ce16c191c1bbad7b656 Mon Sep 17 00:00:00 2001 From: Timur Tabi Date: Wed, 13 Apr 2011 10:38:23 -0500 Subject: [PATCH] powerpc/85xx: Display SERDES 8 erratum warning if banks are not disabled The work-around for P4080 erratum SERDES-8 requires all lanes of banks two and three to be disabled (powered down) in the RCW. Display a warning message if this is not the case. Signed-off-by: Timur Tabi Signed-off-by: Kumar Gala --- arch/powerpc/cpu/mpc85xx/fsl_corenet_serdes.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/arch/powerpc/cpu/mpc85xx/fsl_corenet_serdes.c b/arch/powerpc/cpu/mpc85xx/fsl_corenet_serdes.c index edacdb813f..f5452c0756 100644 --- a/arch/powerpc/cpu/mpc85xx/fsl_corenet_serdes.c +++ b/arch/powerpc/cpu/mpc85xx/fsl_corenet_serdes.c @@ -475,6 +475,17 @@ void fsl_serdes_init(void) } #ifdef CONFIG_SYS_P4080_ERRATUM_SERDES8 + /* + * Display a warning if banks two and three are not disabled in the RCW, + * since our work-around for SERDES8 depends on these banks being + * disabled at power-on. + */ +#define B2_B3 (FSL_CORENET_RCWSRn_SRDS_LPD_B2 | FSL_CORENET_RCWSRn_SRDS_LPD_B3) + if ((in_be32(&gur->rcwsr[5]) & B2_B3) != B2_B3) { + printf("Warning: SERDES8 requires banks two and " + "three to be disabled in the RCW\n"); + } + /* * Store the values of the fsl_srds_lpd_b2 and fsl_srds_lpd_b3 * hwconfig options into the srds_lpd_b[] array. See README.p4080ds -- 2.39.5