diff options
| author | Marek Vasut <marex@denx.de> | 2016-04-05 23:41:56 +0200 |
|---|---|---|
| committer | Marek Vasut <marex@denx.de> | 2016-04-20 11:28:44 +0200 |
| commit | bba7711092a48ef2af00832213c3cb6c2d5f171c (patch) | |
| tree | 69d254c7647c029d5fdde3ecf1c65b8678492c17 /drivers | |
| parent | abaf83619cb1bcb095400c4117bdd3ebbc764905 (diff) | |
| download | u-boot-imx-bba7711092a48ef2af00832213c3cb6c2d5f171c.zip u-boot-imx-bba7711092a48ef2af00832213c3cb6c2d5f171c.tar.gz u-boot-imx-bba7711092a48ef2af00832213c3cb6c2d5f171c.tar.bz2 | |
ddr: altera: Tweak DQS tracking enable handling
In the most unlikely case the DQS tracking was to be disabled,
make sure we do not errornously re-enable it. Note that DQS
tracking is enabled on all systems observed thus far.
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Dinh Nguyen <dinguyen@opensource.altera.com>
Cc: Chin Liang See <clsee@altera.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/ddr/altera/sequencer.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/ddr/altera/sequencer.c b/drivers/ddr/altera/sequencer.c index 34b1aa7..bf74b4e 100644 --- a/drivers/ddr/altera/sequencer.c +++ b/drivers/ddr/altera/sequencer.c @@ -3479,6 +3479,7 @@ grp_failed: /* A group failed, increment the counter. */ static int run_mem_calibrate(void) { int pass; + u32 ctrl_cfg; debug("%s:%d\n", __func__, __LINE__); @@ -3486,7 +3487,9 @@ static int run_mem_calibrate(void) writel(PHY_MGR_CAL_RESET, &phy_mgr_cfg->cal_status); /* Stop tracking manager. */ - clrbits_le32(&sdr_ctrl->ctrl_cfg, SDR_CTRLGRP_CTRLCFG_DQSTRKEN_MASK); + ctrl_cfg = readl(&sdr_ctrl->ctrl_cfg); + writel(ctrl_cfg & ~SDR_CTRLGRP_CTRLCFG_DQSTRKEN_MASK, + &sdr_ctrl->ctrl_cfg); phy_mgr_initialize(); rw_mgr_mem_initialize(); @@ -3507,7 +3510,7 @@ static int run_mem_calibrate(void) writel(0x2, &phy_mgr_cfg->mux_sel); /* Start tracking manager. */ - setbits_le32(&sdr_ctrl->ctrl_cfg, SDR_CTRLGRP_CTRLCFG_DQSTRKEN_MASK); + writel(ctrl_cfg, &sdr_ctrl->ctrl_cfg); return pass; } |