diff options
| author | Adam Ford <aford173@gmail.com> | 2018-10-07 09:20:45 -0500 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2018-10-22 09:18:49 -0400 |
| commit | 169eb191355ec4c5b5b7335ddaf8b73a167a698b (patch) | |
| tree | b03ec45f21e20d57e0f5d655d38298fa1e58840c /board/logicpd | |
| parent | 017d9819e49311486fb4f3ac8034939782faea92 (diff) | |
| download | u-boot-169eb191355ec4c5b5b7335ddaf8b73a167a698b.tar.gz | |
ARM: omap3_logic.c: Optimize DDR timings based on OMAP35 or 36/37
The default timings are assumming an OMAP36 / AM37 / DM37, but
the OMAP35 controller is a bit slower, so DDR may operate out of
spec when under stress. This patch checks the processor type and
sets the DDR timings according to processor type.
Fixes: 5ad4212ce0d5 ("ARM: DTS: Add Logic PD OMAP35/DM37 SOM-LV
and OMAP35 Torpedo")
Signed-off-by: Adam Ford <aford173@gmail.com>
Diffstat (limited to 'board/logicpd')
| -rw-r--r-- | board/logicpd/omap3som/omap3logic.c | 20 |
1 files changed, 15 insertions, 5 deletions
diff --git a/board/logicpd/omap3som/omap3logic.c b/board/logicpd/omap3som/omap3logic.c index 4507b1ed99..0b827355a8 100644 --- a/board/logicpd/omap3som/omap3logic.c +++ b/board/logicpd/omap3som/omap3logic.c @@ -89,11 +89,21 @@ int spl_start_uboot(void) void get_board_mem_timings(struct board_sdrc_timings *timings) { timings->mr = MICRON_V_MR_165; - /* 256MB DDR */ - timings->mcfg = MICRON_V_MCFG_200(256 << 20); - timings->ctrla = MICRON_V_ACTIMA_200; - timings->ctrlb = MICRON_V_ACTIMB_200; - timings->rfr_ctrl = SDP_3430_SDRC_RFR_CTRL_200MHz; + + if (get_cpu_family() == CPU_OMAP36XX) { + /* 200 MHz works for OMAP36/DM37 */ + /* 256MB DDR */ + timings->mcfg = MICRON_V_MCFG_200(256 << 20); + timings->ctrla = MICRON_V_ACTIMA_200; + timings->ctrlb = MICRON_V_ACTIMB_200; + timings->rfr_ctrl = SDP_3430_SDRC_RFR_CTRL_200MHz; + } else { + /* 165 MHz works for OMAP35 */ + timings->mcfg = MICRON_V_MCFG_165(256 << 20); + timings->ctrla = MICRON_V_ACTIMA_165; + timings->ctrlb = MICRON_V_ACTIMB_165; + timings->rfr_ctrl = SDP_3430_SDRC_RFR_CTRL_165MHz; + } } #define GPMC_NAND_COMMAND_0 (OMAP34XX_GPMC_BASE + 0x7c) |