From: Michael Hennerich Date: Wed, 4 Feb 2009 08:49:45 +0000 (+0800) Subject: Blackfin arch: Fix Bug - Kernel does not boot if re-program clocks X-Git-Tag: firefly_0821_release~15659^2~34 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=331693129d1764e38b15561e5712347fd591b2a9;p=firefly-linux-kernel-4.4.55.git 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 Signed-off-by: Bryan Wu --- diff --git a/arch/blackfin/include/asm/mem_init.h b/arch/blackfin/include/asm/mem_init.h index 255a9316ad36..61f7487fbf12 100644 --- a/arch/blackfin/include/asm/mem_init.h +++ b/arch/blackfin/include/asm/mem_init.h @@ -115,7 +115,7 @@ #define mem_SDRRC (((CONFIG_SCLK_HZ / 1000) * SDRAM_Tref) / SDRAM_NRA) - (SDRAM_tRAS_num + SDRAM_tRP_num) /* Enable SCLK Out */ -#define mem_SDGCTL (0x80000000 | SCTLE | SDRAM_CL | SDRAM_tRAS | SDRAM_tRP | SDRAM_tRCD | SDRAM_tWR | PSS) +#define mem_SDGCTL (SCTLE | SDRAM_CL | SDRAM_tRAS | SDRAM_tRP | SDRAM_tRCD | SDRAM_tWR | PSS) #else #define mem_SDRRC CONFIG_MEM_SDRRC #define mem_SDGCTL CONFIG_MEM_SDGCTL 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 #include +#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();