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| author | Michael Hennerich <michael.hennerich@analog.com> | 2009-02-04 16:49:45 +0800 |
|---|---|---|
| committer | Bryan Wu <cooloney@kernel.org> | 2009-02-04 16:49:45 +0800 |
| commit | 331693129d1764e38b15561e5712347fd591b2a9 (patch) | |
| tree | 7114d0bd0f8149f0e5ed041a91942a4d712e2d27 /arch/blackfin/mach-common | |
| parent | 41245ac5952e5b05e6fbb7c188eae0947f640189 (diff) | |
| download | blackbird-op-linux-331693129d1764e38b15561e5712347fd591b2a9.tar.gz blackbird-op-linux-331693129d1764e38b15561e5712347fd591b2a9.zip | |
Blackfin arch: Fix Bug - Kernel does not boot if re-program clocks
On BF561 EBIU_SDGCTL bit 31 controls the SDRAM external data
path width, typically set 0 for a 32-bit bus width. On other
Blackfin derivatives this bit should be set by default.
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
Diffstat (limited to 'arch/blackfin/mach-common')
| -rw-r--r-- | arch/blackfin/mach-common/clocks-init.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/blackfin/mach-common/clocks-init.c b/arch/blackfin/mach-common/clocks-init.c index 5d182abefc7b..9dddb6f8cc85 100644 --- a/arch/blackfin/mach-common/clocks-init.c +++ b/arch/blackfin/mach-common/clocks-init.c @@ -14,6 +14,7 @@ #include <asm/clocks.h> #include <asm/mem_init.h> +#define SDGCTL_WIDTH (1 << 31) /* SDRAM external data path width */ #define PLL_CTL_VAL \ (((CONFIG_VCO_MULT & 63) << 9) | CLKIN_HALF | \ (PLL_BYPASS << 8) | (ANOMALY_05000265 ? 0x8000 : 0)) @@ -76,7 +77,7 @@ void init_clocks(void) bfin_write_PLL_DIV(CONFIG_CCLK_ACT_DIV | CONFIG_SCLK_DIV); #ifdef EBIU_SDGCTL bfin_write_EBIU_SDRRC(mem_SDRRC); - bfin_write_EBIU_SDGCTL(mem_SDGCTL); + bfin_write_EBIU_SDGCTL((bfin_read_EBIU_SDGCTL() & SDGCTL_WIDTH) | mem_SDGCTL); #else bfin_write_EBIU_RSTCTL(bfin_read_EBIU_RSTCTL() & ~(SRREQ)); do_sync(); |
