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mx6: ddr: add routine to return DDR calibration data

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Add routine mmdc_read_calibration() to return the output of DDR
calibration. This can be used for debugging or to aid in construction
of static memory configuration.

This routine will be used in a subsequent patch set adding a virtual
"mx6memcal" board, but could also be useful when gathering statistics
during an initial production run.

Signed-off-by: Eric Nelson <eric@nelint.com>
This commit is contained in:
Eric Nelson
2016-10-30 16:33:49 -07:00
committed by Stefano Babic
parent 7f17fb7400
commit 48c7d4379b
2 changed files with 25 additions and 0 deletions
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2
arch/arm/include/asm/arch-mx6/mx6-ddr.h
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@@ -461,6 +461,8 @@ void mx6sl_dram_iocfg(unsigned width,
#if defined(CONFIG_MX6QDL) || defined(CONFIG_MX6Q) || defined(CONFIG_MX6D)
int mmdc_do_write_level_calibration(struct mx6_ddr_sysinfo const *sysinfo);
int mmdc_do_dqs_calibration(struct mx6_ddr_sysinfo const *sysinfo);
void mmdc_read_calibration(struct mx6_ddr_sysinfo const *sysinfo,
struct mx6_mmdc_calibration *calib);
#endif
/* configure mx6 mmdc registers */