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@xxxxxx>
---
drivers/soc/ti/omap_prm.c | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/drivers/soc/ti/omap_prm.c b/drivers/soc/ti/omap_prm.c
index ab0b66ad715d..d70f64e7a5c8 100644
--- a/drivers/soc/ti/omap_prm.c
+++ b/drivers/soc/ti/omap_prm.c
@@ -153,6 +153,18 @@ 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__,
+ dev_name(rcdev->dev), id);
+
return 0;
}
--
2.17.1
--
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