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| author | Tim Harvey <tharvey@gateworks.com> | 2015-04-03 23:52:52 (GMT) |
|---|---|---|
| committer | Stefano Babic <sbabic@denx.de> | 2015-04-22 12:35:35 (GMT) |
| commit | 78c5a180871d4337d4cfd41d6739a04b271b2e4d (patch) | |
| tree | 2aaac7ec7a70f9b06587d64996d4e12b699422c4 /arch/arm/include/asm/arch-mx6 | |
| parent | 32f9ef3e2ba813ea541f08c551b9188ef4749307 (diff) | |
| download | u-boot-78c5a180871d4337d4cfd41d6739a04b271b2e4d.tar.xz | |
arm: mx6: ddr: add pd_fast_exit flag to system information
DDR3 has a special Precharge power-down mode: fast-exit vs slow-exit.
In slow-exit mode the DLL is off but in some quiescent state that makes it easy
to turn on again in tXPDLL cycles (about 10tCK) vs the full tDLLK (512tCK).
In fast-exist mode the DLL is maintained such that it is ready again in about
3tCK.
Signed-off-by: Tim Harvey <tharvey@gateworks.com>
Diffstat (limited to 'arch/arm/include/asm/arch-mx6')
| -rw-r--r-- | arch/arm/include/asm/arch-mx6/mx6-ddr.h | 1 |
1 files changed, 1 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 8e0d7d1..c49aa62 100644 --- a/arch/arm/include/asm/arch-mx6/mx6-ddr.h +++ b/arch/arm/include/asm/arch-mx6/mx6-ddr.h @@ -250,6 +250,7 @@ struct mx6_ddr_sysinfo { u8 mif3_mode; /* Command prediction working mode */ u8 rst_to_cke; /* Time from SDE enable to CKE rise */ u8 sde_to_rst; /* Time from SDE enable until DDR reset# is high */ + u8 pd_fast_exit;/* enable precharge powerdown fast-exit */ }; /* |