diff options
| author | Sonic Zhang <sonic.zhang@analog.com> | 2008-04-24 23:06:10 +0400 |
|---|---|---|
| committer | Bryan Wu <cooloney@kernel.org> | 2008-04-24 23:06:10 +0400 |
| commit | 37167e6411f15fc8d8da8acabfd7cdd17668ffad (patch) | |
| tree | 04952c29952d995885369fde761b0b417c0de36f | |
| parent | 25bb23bfd061075955ca68b6a336c542d56263b3 (diff) | |
| download | linux-37167e6411f15fc8d8da8acabfd7cdd17668ffad.tar.xz | |
[Blackfin] arch: Fix bug - Properly calculate DDR clock.
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
| -rw-r--r-- | include/asm-blackfin/mach-bf548/mem_init.h | 20 |
1 files changed, 13 insertions, 7 deletions
diff --git a/include/asm-blackfin/mach-bf548/mem_init.h b/include/asm-blackfin/mach-bf548/mem_init.h index befc2903d5a5..ab0b863eee66 100644 --- a/include/asm-blackfin/mach-bf548/mem_init.h +++ b/include/asm-blackfin/mach-bf548/mem_init.h @@ -29,16 +29,19 @@ * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #define MIN_DDR_SCLK(x) (x*(CONFIG_SCLK_HZ/1000/1000)/1000 + 1) +#define MAX_DDR_SCLK(x) (x*(CONFIG_SCLK_HZ/1000/1000)/1000) +#define DDR_CLK_HZ(x) (1000*1000*1000/x) #if (CONFIG_MEM_MT46V32M16_6T) #define DDR_SIZE DEVSZ_512 #define DDR_WIDTH DEVWD_16 +#define DDR_MAX_tCK 13 #define DDR_tRC DDR_TRC(MIN_DDR_SCLK(60)) #define DDR_tRAS DDR_TRAS(MIN_DDR_SCLK(42)) #define DDR_tRP DDR_TRP(MIN_DDR_SCLK(15)) #define DDR_tRFC DDR_TRFC(MIN_DDR_SCLK(72)) -#define DDR_tREFI DDR_TREFI(MIN_DDR_SCLK(7800)) +#define DDR_tREFI DDR_TREFI(MAX_DDR_SCLK(7800)) #define DDR_tRCD DDR_TRCD(MIN_DDR_SCLK(15)) #define DDR_tWTR DDR_TWTR(1) @@ -49,12 +52,13 @@ #if (CONFIG_MEM_MT46V32M16_5B) #define DDR_SIZE DEVSZ_512 #define DDR_WIDTH DEVWD_16 +#define DDR_MAX_tCK 13 #define DDR_tRC DDR_TRC(MIN_DDR_SCLK(55)) #define DDR_tRAS DDR_TRAS(MIN_DDR_SCLK(40)) #define DDR_tRP DDR_TRP(MIN_DDR_SCLK(15)) #define DDR_tRFC DDR_TRFC(MIN_DDR_SCLK(70)) -#define DDR_tREFI DDR_TREFI(MIN_DDR_SCLK(7800)) +#define DDR_tREFI DDR_TREFI(MAX_DDR_SCLK(7800)) #define DDR_tRCD DDR_TRCD(MIN_DDR_SCLK(15)) #define DDR_tWTR DDR_TWTR(2) @@ -65,6 +69,7 @@ #if (CONFIG_MEM_GENERIC_BOARD) #define DDR_SIZE DEVSZ_512 #define DDR_WIDTH DEVWD_16 +#define DDR_MAX_tCK 13 #define DDR_tRCD DDR_TRCD(3) #define DDR_tWTR DDR_TWTR(2) @@ -77,14 +82,15 @@ #define DDR_tREFI DDR_TREFI(1288) #endif -#if (CONFIG_SCLK_HZ <= 133333333) -#define DDR_CL CL_2 -#elif (CONFIG_SCLK_HZ <= 166666666) -#define DDR_CL CL_2_5 +#if (CONFIG_SCLK_HZ < DDR_CLK_HZ(DDR_MAX_tCK)) +# error "CONFIG_SCLK_HZ is too small (<DDR_CLK_HZ(DDR_MAX_tCK) Hz)." +#elif(CONFIG_SCLK_HZ <= 133333333) +# define DDR_CL CL_2 #else -#define DDR_CL CL_3 +# error "CONFIG_SCLK_HZ is too large (>133333333 Hz)." #endif + #define mem_DDRCTL0 (DDR_tRP | DDR_tRAS | DDR_tRC | DDR_tRFC | DDR_tREFI) #define mem_DDRCTL1 (DDR_DATWIDTH | EXTBANK_1 | DDR_SIZE | DDR_WIDTH | DDR_tWTR \ | DDR_tMRD | DDR_tWR | DDR_tRCD) |