From bba7711092a48ef2af00832213c3cb6c2d5f171c Mon Sep 17 00:00:00 2001 From: Marek Vasut Date: Tue, 5 Apr 2016 23:41:56 +0200 Subject: 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 Cc: Dinh Nguyen Cc: Chin Liang See --- drivers/ddr/altera/sequencer.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/drivers/ddr/altera/sequencer.c b/drivers/ddr/altera/sequencer.c index 34b1aa79fb..bf74b4e651 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; } -- cgit