diff options
author | Marek Vasut <marex@denx.de> | 2014-04-28 05:38:43 +0400 |
---|---|---|
committer | Stefano Babic <sbabic@denx.de> | 2014-09-29 11:02:17 +0400 |
commit | 1fb065feae451b8f22cb9b8b156508ea541c36d7 (patch) | |
tree | 1520f20f36d0538d4b43988856f806c9093c5dbe /board/olimex/mx23_olinuxino/mx23_olinuxino.c | |
parent | ca11db2603e58cfee8e64931dcc3c87023ecb1cf (diff) | |
download | u-boot-1fb065feae451b8f22cb9b8b156508ea541c36d7.tar.xz |
arm: mxs: olinuxino: Fine-tune DRAM configuration
Add fine-tuning for the DRAM configuration according to the DRAM chip
datasheet. THis configuration applies to both Hynix HY5DU12622DTP and
Samsung K5H511538J-D43 .
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Stefano Babic <sbabic@denx.de>
Diffstat (limited to 'board/olimex/mx23_olinuxino/mx23_olinuxino.c')
-rw-r--r-- | board/olimex/mx23_olinuxino/mx23_olinuxino.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/board/olimex/mx23_olinuxino/mx23_olinuxino.c b/board/olimex/mx23_olinuxino/mx23_olinuxino.c index 65cbbf15b7..313ab20e26 100644 --- a/board/olimex/mx23_olinuxino/mx23_olinuxino.c +++ b/board/olimex/mx23_olinuxino/mx23_olinuxino.c @@ -78,3 +78,33 @@ int board_init(void) return 0; } + +/* Fine-tune the DRAM configuration. */ +void mxs_adjust_memory_params(uint32_t *dram_vals) +{ + /* Enable Auto Precharge. */ + dram_vals[3] |= 1 << 8; + /* Enable Fast Writes. */ + dram_vals[5] |= 1 << 8; + /* tEMRS = 3*tCK */ + dram_vals[10] &= ~(0x3 << 8); + dram_vals[10] |= (0x3 << 8); + /* CASLAT = 3*tCK */ + dram_vals[11] &= ~(0x3 << 0); + dram_vals[11] |= (0x3 << 0); + /* tCKE = 1*tCK */ + dram_vals[12] &= ~(0x7 << 0); + dram_vals[12] |= (0x1 << 0); + /* CASLAT_LIN_GATE = 3*tCK , CASLAT_LIN = 3*tCK, tWTR=2*tCK */ + dram_vals[13] &= ~((0xf << 16) | (0xf << 24) | (0xf << 0)); + dram_vals[13] |= (0x6 << 16) | (0x6 << 24) | (0x2 << 0); + /* tDAL = 6*tCK */ + dram_vals[15] &= ~(0xf << 16); + dram_vals[15] |= (0x6 << 16); + /* tREF = 1040*tCK */ + dram_vals[26] &= ~0xffff; + dram_vals[26] |= 0x0410; + /* tRAS_MAX = 9334*tCK */ + dram_vals[32] &= ~0xffff; + dram_vals[32] |= 0x2475; +} |