powerpc/t1040qds: Update DDR initialization related settings
PATCH v3 1/1 powerpc/t1040qds: Update DDR initialization related settings
Update following DDR related settings for T1040QDS -Correct number of chip selects to two as t1040qds supports
two Chip selects.
-Update board_specific_parameters udimm structure with settings
derived via calibration.
-Reduced I2C speed to 50KHz as DDR-SPD does not get reliably
read at 400KHz.
Verified the updated settings to be working fine with dual-ranked Micron, MT18KSF51272AZ-1G6 DIMM at data rate 833MT/s, 1333MT/s and 1600MT/s.
---
Changes for v3:
Updated description based on York's comments.
Changes for v2:
Reduced I2C speed to 50KHz.
board/freescale/t1040qds/ddr.h | 22 ++++++++++++---------- include/configs/T1040QDS.h | 6 +++--- 2 files changed, 15 insertions(+), 13 deletions(-)
board/freescale/t1040qds/ddr.h +12 -10
@@ -31,16 +31,18 @@ static const struct board_specific_parameters udimm0[] = {* num| hi| rank| clk| wrlvl | wrlvl | wrlvl | cpo |wrdata|2T * ranks| mhz| GB |adjst| start | ctl2 | ctl3 | |delay | */ - {2, 1350, 4, 4, 8, 0x0809090b, 0x0c0c0d0a, 0xff, 2, 0}, - {2, 1350, 0, 5, 7, 0x0709090b, 0x0c0c0d09, 0xff, 2, 0}, - {2, 1666, 4, 4, 8, 0x080a0a0d, 0x0d10100b, 0xff, 2, 0}, - {2, 1666, 0, 5, 7, 0x080a0a0c, 0x0d0d0e0a, 0xff, 2, 0}, - {2, 1900, 0, 4, 8, 0x090a0b0e, 0x0f11120c, 0xff, 2, 0}, - {2, 2140, 0, 4, 8, 0x090a0b0e, 0x0f11120c, 0xff, 2, 0}, - {1, 1350, 0, 5, 8, 0x0809090b, 0x0c0c0d0a, 0xff, 2, 0}, - {1, 1700, 0, 5, 8, 0x080a0a0c, 0x0c0d0e0a, 0xff, 2, 0}, - {1, 1900, 0, 4, 8, 0x080a0a0c, 0x0e0e0f0a, 0xff, 2, 0}, - {1, 2140, 0, 4, 8, 0x090a0b0c, 0x0e0f100b, 0xff, 2, 0}, + {2, 833, 4, 4, 6, 0x06060607, 0x08080807, 0xff, 2, 0}, + {2, 833, 0, 4, 6, 0x06060607, 0x08080807, 0xff, 2, 0}, + {2, 1350, 4, 4, 7, 0x0708080A, 0x0A0B0C09, 0xff, 2, 0}, + {2, 1350, 0, 4, 7, 0x0708080A, 0x0A0B0C09, 0xff, 2, 0}, + {2, 1666, 4, 4, 7, 0x0808090B, 0x0C0D0E0A, 0xff, 2, 0}, + {2, 1666, 0, 4, 7, 0x0808090B, 0x0C0D0E0A, 0xff, 2, 0}, + {1, 833, 4, 4, 6, 0x06060607, 0x08080807, 0xff, 2, 0}, + {1, 833, 0, 4, 6, 0x06060607, 0x08080807, 0xff, 2, 0}, + {1, 1350, 4, 4, 7, 0x0708080A, 0x0A0B0C09, 0xff, 2, 0}, + {1, 1350, 0, 4, 7, 0x0708080A, 0x0A0B0C09, 0xff, 2, 0}, + {1, 1666, 4, 4, 7, 0x0808090B, 0x0C0D0E0A, 0xff, 2, 0}, + {1, 1666, 0, 4, 7, 0x0808090B, 0x0C0D0E0A, 0xff, 2, 0}, {} };
include/configs/T1040QDS.h +3 -3
@@ -167,7 +167,7 @@ unsigned long get_board_ddr_clk(void);/* CONFIG_NUM_DDR_CONTROLLERS is defined in include/asm/config_mpc85xx.h */ #define CONFIG_DIMM_SLOTS_PER_CTLR 1 -#define CONFIG_CHIP_SELECTS_PER_CTRL (4 * CONFIG_DIMM_SLOTS_PER_CTLR) +#define CONFIG_CHIP_SELECTS_PER_CTRL (2 * CONFIG_DIMM_SLOTS_PER_CTLR)#define CONFIG_DDR_SPD #define CONFIG_SYS_FSL_DDR3
@@ -413,9 +413,9 @@ unsigned long get_board_ddr_clk(void);/* I2C */ #define CONFIG_SYS_I2C #define CONFIG_SYS_I2C_FSL /* Use FSL common I2C driver */ -#define CONFIG_SYS_FSL_I2C_SPEED 400000/* I2C speed in Hz */ +#define CONFIG_SYS_FSL_I2C_SPEED 50000/* I2C speed in Hz */ #define CONFIG_SYS_FSL_I2C_SLAVE 0x7F -#define CONFIG_SYS_FSL_I2C2_SPEED 400000/* I2C speed in Hz */ +#define CONFIG_SYS_FSL_I2C2_SPEED 50000/* I2C speed in Hz */ #define CONFIG_SYS_FSL_I2C2_SLAVE 0x7F#define CONFIG_SYS_FSL_I2C_OFFSET 0x118000#define CONFIG_SYS_FSL_I2C2_OFFSET 0x119000
Signature · 1 line
1.7.4.1
PATCH v3 1/1 powerpc/t1040qds: Update DDR initialization related settings
Quoted 13 lines · Priyanka Jain
Update following DDR related settings for T1040QDS
(quoted diff) +0
-3-Correct number of chip selects to two as t1040qds supports two Chip selects. -Update board_specific_parameters udimm structure with settings derived via calibration. -Reduced I2C speed to 50KHz as DDR-SPD does not get reliably read at 400KHz.Verified the updated settings to be working fine with dual-ranked Micron, MT18KSF51272AZ-1G6 DIMM at data rate 833MT/s, 1333MT/s and 1600MT/s.
Quoted 9 lines
Signed-off-by Poonam Aggrwal <[email protected]>Signed-off-by Priyanka Jain <[email protected]>---
Changes for v3:
Updated description based on York's comments.Changes for v2:
Reduced I2C speed to 50KHz.
Applied to u-boot-mpc85xx master branch. Awaiting upstream.
York