From 846f1574ddddeda2bc227655e687308695f41cdc Mon Sep 17 00:00:00 2001 From: Andre Schwarz Date: Mon, 23 Jun 2008 11:40:56 +0200 Subject: fix system config overwrite @ MPC834x and MPC8313 During 83xx setup the "System I/O configuration register high" gets overwritten with user defined value if CFG_SICRH is defined. Regarding to the MPC834x manual (Table 5-28 reve.1) bits 28+29 of SICRH must keep their reset value regardless of configuration. On my board (using RGMII) those bits are set after reset - yet it's unclear where they come from. The patch keeps both bits on MPC834x and MPC8313. Signed-off-by: Andre Schwarz Signed-off-by: Kim Phillips --- cpu/mpc83xx/cpu_init.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/cpu/mpc83xx/cpu_init.c b/cpu/mpc83xx/cpu_init.c index fb184d816b..67c9e570c3 100644 --- a/cpu/mpc83xx/cpu_init.c +++ b/cpu/mpc83xx/cpu_init.c @@ -181,8 +181,13 @@ void cpu_init_f (volatile immap_t * im) /* System General Purpose Register */ #ifdef CFG_SICRH +#if defined(CONFIG_MPC834X) || defined(CONFIG_MPC8313) + /* regarding to MPC34x manual rev.1 bits 28..29 must be preserved */ + im->sysconf.sicrh = (im->sysconf.sicrh & 0x0000000C) | CFG_SICRH; +#else im->sysconf.sicrh = CFG_SICRH; #endif +#endif #ifdef CFG_SICRL im->sysconf.sicrl = CFG_SICRL; #endif -- cgit v1.2.1