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>
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@ -152,6 +152,18 @@ static int omap_reset_deassert(struct reset_controller_dev *rcdev,
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writel_relaxed(v, reset->prm->base + reset->prm->data->rstctrl);
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spin_unlock_irqrestore(&reset->lock, flags);
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if (!has_rstst)
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return 0;
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/* wait for the status to be set */
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ret = readl_relaxed_poll_timeout(reset->prm->base +
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reset->prm->data->rstst,
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v, v & BIT(st_bit), 1,
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OMAP_RESET_MAX_WAIT);
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if (ret)
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pr_err("%s: timedout waiting for %s:%lu\n", __func__,
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reset->prm->data->name, id);
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return 0;
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}
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