soc: ti: omap-prm: poll for reset complete during de-assert (c5117a78) · Commits · 戴 / test

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>

drivers/soc/ti/omap_prm.c

+12 −0

Original line number	Diff line number	Diff line
		@@ -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;
		}

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