From 56a9270521baaa00e12639a978302a67f61ef060 Mon Sep 17 00:00:00 2001 From: Kumar Gala Date: Thu, 30 Aug 2007 16:18:18 -0500 Subject: Fix ULI RTC support on MPC8544 DS The RTC on the M1575 ULI chipset requires a dummy read before we are able to talk to the RTC. We accomplish this by adding a second memory region to the PHB the ULI is on and read from it. The second region is added to maintain compatiabilty with Linux's view of the PCI memory map. Signed-off-by: Kumar Gala --- board/freescale/mpc8544ds/init.S | 2 +- board/freescale/mpc8544ds/mpc8544ds.c | 6 ++++++ 2 files changed, 7 insertions(+), 1 deletion(-) (limited to 'board/freescale') diff --git a/board/freescale/mpc8544ds/init.S b/board/freescale/mpc8544ds/init.S index 900c3680c7..68ccba746b 100644 --- a/board/freescale/mpc8544ds/init.S +++ b/board/freescale/mpc8544ds/init.S @@ -237,6 +237,6 @@ law_entry: /* contains both PCIE3 MEM & IO space */ .long (CFG_PCIE3_MEM_PHYS>>12) & 0xfffff - .long LAWAR_EN | LAWAR_TRGT_PCIE3 | (LAWAR_SIZE & LAWAR_SIZE_2M) + .long LAWAR_EN | LAWAR_TRGT_PCIE3 | (LAWAR_SIZE & LAWAR_SIZE_4M) 4: entry_end diff --git a/board/freescale/mpc8544ds/mpc8544ds.c b/board/freescale/mpc8544ds/mpc8544ds.c index 4c3b27f238..76d909191f 100644 --- a/board/freescale/mpc8544ds/mpc8544ds.c +++ b/board/freescale/mpc8544ds/mpc8544ds.c @@ -26,6 +26,7 @@ #include #include #include +#include #include #include @@ -222,6 +223,11 @@ pci_init_board(void) printf (" PCIE3 on bus %02x - %02x\n", hose->first_busno,hose->last_busno); + /* + * Activate ULI1575 legacy chip by performing a fake + * memory access. Needed to make ULI RTC work. + */ + in_be32(CFG_PCIE3_MEM_BASE); } else { printf (" PCIE3: disabled\n"); } -- cgit v1.2.1