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ddr: altera: Clean up rw_mgr_mem_calibrate_writes()

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Reorder the content of the function a little and fix the comments
so they at least become full sentences. Constify function args.
Fix the return value to match the common convention of 0 meaning
success.

Signed-off-by: Marek Vasut <marex@denx.de>
This commit is contained in:
Marek Vasut 2015-07-18 07:23:25 +02:00
parent 783fcf59bd
commit db3a606158
1 changed files with 24 additions and 12 deletions
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36
drivers/ddr/altera/sequencer.c
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@ -3160,25 +3160,37 @@ static uint32_t rw_mgr_mem_calibrate_writes_center(uint32_t rank_bgn,
return (dq_margin >= 0) && (dqs_margin >= 0) && (dm_margin >= 0);
}
/* calibrate the write operations */
static uint32_t rw_mgr_mem_calibrate_writes(uint32_t rank_bgn, uint32_t g,
uint32_t test_bgn)
/**
* rw_mgr_mem_calibrate_writes() - Write Calibration Part One
* @rank_bgn: Rank number
* @group: Read/Write Group
* @test_bgn: Rank at which the test begins
*
* Stage 2: Write Calibration Part One.
*
* This function implements UniPHY calibration Stage 2, as explained in
* detail in Altera EMI_RM 2015.05.04 , "UniPHY Calibration Stages".
*/
static int rw_mgr_mem_calibrate_writes(const u32 rank_bgn, const u32 group,
const u32 test_bgn)
{
/* update info for sims */
debug("%s:%d %u %u\n", __func__, __LINE__, g, test_bgn);
int ret;
/* Update info for sims */
debug("%s:%d %u %u\n", __func__, __LINE__, group, test_bgn);
reg_file_set_group(group);
reg_file_set_stage(CAL_STAGE_WRITES);
reg_file_set_sub_stage(CAL_SUBSTAGE_WRITES_CENTER);
reg_file_set_group(g);
if (!rw_mgr_mem_calibrate_writes_center(rank_bgn, g, test_bgn)) {
set_failing_group_stage(g, CAL_STAGE_WRITES,
ret = rw_mgr_mem_calibrate_writes_center(rank_bgn, group, test_bgn);
if (!ret) {
set_failing_group_stage(group, CAL_STAGE_WRITES,
CAL_SUBSTAGE_WRITES_CENTER);
return 0;
return -EIO;
}
return 1;
return 0;
}
/**
@ -3472,7 +3484,7 @@ static uint32_t mem_calibrate(void)
continue;
/* Calibrate WRITEs */
if (rw_mgr_mem_calibrate_writes(rank_bgn,
if (!rw_mgr_mem_calibrate_writes(rank_bgn,
write_group, write_test_bgn))
continue;