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| author | Peng Fan <Peng.Fan@freescale.com> | 2015-08-17 08:11:04 (GMT) |
|---|---|---|
| committer | Stefano Babic <sbabic@denx.de> | 2015-09-02 13:34:12 (GMT) |
| commit | eb796cbb69a39eb08b08e1715e21c8034cd349b7 (patch) | |
| tree | 6e9ca6b153217ecc02fcfa5b7cd2292e8769fd13 /arch/arm/include | |
| parent | f2ff834365296151b24bf8617f1f6dd070bdce9e (diff) | |
| download | u-boot-eb796cbb69a39eb08b08e1715e21c8034cd349b7.tar.xz | |
imx: mx6: ddr: add LPDDR2 support
Add LPDDR2 support:
1. Implement a function mx6_lpddr2_cfg to initialize MMDC for LPDDR2.
2. Introduce a structure mx6_lpddr2_cfg, most entrys are same to
mx6_ddr3_cfg, but still keep it a single one for easy to choose
parameters for LPDDR2.
3. If ddr_type is LPDDR2, use mx6_lpddr2_cfg to init MMDC.
4. Update comments.
Signed-off-by: Peng Fan <Peng.Fan@freescale.com>
Cc: Stefano Babic <sbabic@denx.de>
Cc: Tim Harvey <tharvey@gateworks.com>
Diffstat (limited to 'arch/arm/include')
| -rw-r--r-- | arch/arm/include/asm/arch-mx6/mx6-ddr.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/arch/arm/include/asm/arch-mx6/mx6-ddr.h b/arch/arm/include/asm/arch-mx6/mx6-ddr.h index 36fcb2b..68d9bda 100644 --- a/arch/arm/include/asm/arch-mx6/mx6-ddr.h +++ b/arch/arm/include/asm/arch-mx6/mx6-ddr.h @@ -377,6 +377,21 @@ struct mx6_ddr3_cfg { u8 SRT; /* self-refresh temperature: 0=normal, 1=extended */ }; +/* Device Information: Varies per LPDDR2 part number and speed grade */ +struct mx6_lpddr2_cfg { + u16 mem_speed; /* ie 800 for LPDDR2-800 */ + u8 density; /* chip density (Gb) (1,2,4,8) */ + u8 width; /* bus width (bits) (4,8,16) */ + u8 banks; /* number of banks */ + u8 rowaddr; /* row address bits (11-16)*/ + u8 coladdr; /* col address bits (9-12) */ + u16 trcd_lp; + u16 trppb_lp; + u16 trpab_lp; + u16 trcmin; /* tRC min (ns*100) */ + u16 trasmin; /* tRAS min (ns*100) */ +}; + /* System Information: Varies per board design, layout, and term choices */ struct mx6_ddr_sysinfo { u8 dsize; /* size of bus (in dwords: 0=16bit,1=32bit,2=64bit) */ |