[U-Boot] [PATCH 10/18] arm: mx6: ddr: configure MMDC for slow_pd

Nikita Kiryanov nikita at compulab.co.il
Sun Aug 3 09:34:40 CEST 2014


According to MX6 TRM, both MMDC and DRAM should be configured to
the same powerdown precharge. Currently, mx6_dram_cfg()
configures MMDC for fast pd, and the DRAM for slow pd.

Configure MMDC for slow pd.

Cc: Stefano Babic <sbabic at denx.de>
Cc: Tim Harvey <tharvey at gateworks.com>
Signed-off-by: Nikita Kiryanov <nikita at compulab.co.il>
---
 arch/arm/cpu/armv7/mx6/ddr.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm/cpu/armv7/mx6/ddr.c b/arch/arm/cpu/armv7/mx6/ddr.c
index 70ce38f..c0fb749 100644
--- a/arch/arm/cpu/armv7/mx6/ddr.c
+++ b/arch/arm/cpu/armv7/mx6/ddr.c
@@ -463,6 +463,7 @@ void mx6_dram_cfg(const struct mx6_ddr_sysinfo *sysinfo,
 	mmdc0->mdpdc = (tcke & 0x7) << 16 |
 			5            << 12 |  /* PWDT_1: 256 cycles */
 			5            <<  8 |  /* PWDT_0: 256 cycles */
+			1            <<  7 |  /* SLOW_PD */
 			1            <<  6 |  /* BOTH_CS_PD */
 			(tcksrx & 0x7) << 3 |
 			(tcksre & 0x7);
-- 
1.9.1



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