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pinctrl: tegra: Flush pinctrl writes during resume

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This patch adds pinctrl register read to flush all the prior pinctrl
writes and then adds barrier for pinctrl register read to complete
during resume to make sure all pinctrl changes are effective.

Acked-by: Thierry Reding <treding@nvidia.com>
Reviewed-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Sowjanya Komatineni <skomatineni@nvidia.com>
Link: https://lore.kernel.org/r/1565984527-5272-3-git-send-email-skomatineni@nvidia.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Sowjanya Komatineni 2019-08-16 12:41:47 -07:00 committed by Linus Walleij
parent c2cf351eba
commit a4873accca
1 changed files with 4 additions and 0 deletions
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4
drivers/pinctrl/tegra/pinctrl-tegra.c
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@ -677,6 +677,10 @@ static int tegra_pinctrl_resume(struct device *dev)
writel_relaxed(*backup_regs++, regs++);
}
/* flush all the prior writes */
readl_relaxed(pmx->regs[0]);
/* wait for pinctrl register read to complete */
rmb();
return 0;
}