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Fix memory initialization on MPC8349E-mITX 

Define CFG_DDR_SDRAM_CLK_CNTL for the MPC8349E-mITX and MPC8349E-mITX-GP.
This allows ddr->sdram_clk_cntl to be properly initialized.  This is necessary
on some ITX boards, notably those with a revision 3.1 CPU.

Also change spd_sdram() in cpu/mpc83xx/spd_sdram.c to not write anything into
ddr->sdram_clk_cntl if CFG_DDR_SDRAM_CLK_CNTL is not defined.

Signed-off-by: Timur Tabi <timur@freescale.com>
Acked-by: Michael Benedict <MBenedict@twacs.com>
Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
This commit is contained in:
Timur Tabi 2007-04-30 13:59:50 -05:00 committed by Kim Phillips
parent 54b2d434ae
commit f64702b7fc
3 changed files with 4 additions and 7 deletions
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3
board/mpc8349itx/mpc8349itx.c
View File

@ -80,8 +80,7 @@ int fixed_sdram(void)
im->ddr.sdram_interval =
(0x0410 << SDRAM_INTERVAL_REFINT_SHIFT) | (0x0100 <<
SDRAM_INTERVAL_BSTOPRE_SHIFT);
im->ddr.sdram_clk_cntl =
DDR_SDRAM_CLK_CNTL_SS_EN | DDR_SDRAM_CLK_CNTL_CLK_ADJUST_05;
im->ddr.sdram_clk_cntl = CFG_DDR_SDRAM_CLK_CNTL;
udelay(200);

5
cpu/mpc83xx/spd_sdram.c
View File

@ -693,11 +693,6 @@ long int spd_sdram()
#ifdef CFG_DDR_SDRAM_CLK_CNTL /* Optional platform specific value */
ddr->sdram_clk_cntl = CFG_DDR_SDRAM_CLK_CNTL;
#else
/* SS_EN = 0, source synchronous disable
* CLK_ADJST = 0, MCK/MCK# is launched aligned with addr/cmd
*/
ddr->sdram_clk_cntl = 0x00000000;
#endif
debug("DDR:sdram_clk_cntl=0x%08x\n", ddr->sdram_clk_cntl);

3
include/configs/MPC8349ITX.h
View File

@ -154,6 +154,9 @@
#define CFG_MEMTEST_START 0x1000 /* memtest region */
#define CFG_MEMTEST_END 0x2000
#define CFG_DDR_SDRAM_CLK_CNTL (DDR_SDRAM_CLK_CNTL_SS_EN | \
DDR_SDRAM_CLK_CNTL_CLK_ADJUST_05)
#ifdef CONFIG_HARD_I2C
#define CONFIG_SPD_EEPROM /* use SPD EEPROM for DDR setup*/
#endif