diff options
| author |   Tero Kristo <t-kristo@ti.com> | 2019-10-09 08:55:37 -0700 |
|---|---|---|
| committer |   Santosh Shilimkar <santosh.shilimkar@oracle.com> | 2019-10-09 08:55:37 -0700 |
| commit | c5117a78dd88e5b673897baec0a6eed9ee599e02 (patch) | |
| tree | 5394adada8c217fa31367a481627990c7a1e149a /drivers/soc | |
| parent | soc: ti: add initial PRM driver with reset control support (diff) | |
| download | linux-dev-c5117a78dd88e5b673897baec0a6eed9ee599e02.tar.xz linux-dev-c5117a78dd88e5b673897baec0a6eed9ee599e02.zip | |
soc: ti: omap-prm: poll for reset complete during de-assert
Poll for reset completion status during de-assertion of reset, otherwise
the IP in question might be accessed before it has left reset properly.
Signed-off-by: Tero Kristo <t-kristo@ti.com>
Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de>
Reviewed-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Diffstat (limited to 'drivers/soc')
| -rw-r--r-- | drivers/soc/ti/omap_prm.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/soc/ti/omap_prm.c b/drivers/soc/ti/omap_prm.c index d171e96e4ef1..a3ffb19e402f 100644 --- a/drivers/soc/ti/omap_prm.c +++ b/drivers/soc/ti/omap_prm.c @@ -152,6 +152,18 @@ static int omap_reset_deassert(struct reset_controller_dev *rcdev, writel_relaxed(v, reset->prm->base + reset->prm->data->rstctrl); spin_unlock_irqrestore(&reset->lock, flags); + if (!has_rstst) + return 0; + + /* wait for the status to be set */ + ret = readl_relaxed_poll_timeout(reset->prm->base + + reset->prm->data->rstst, + v, v & BIT(st_bit), 1, + OMAP_RESET_MAX_WAIT); + if (ret) + pr_err("%s: timedout waiting for %s:%lu\n", __func__, + reset->prm->data->name, id); + return 0; } |