pinctrl: tegra: Fix write barrier placement in pmx_writel
[ Upstream commit c2cf351eba2ff6002ce8eb178452219d2521e38e ] pmx_writel uses writel which inserts write barrier before the register write. This patch has fix to replace writel with writel_relaxed followed by a readback and memory barrier to ensure write operation is completed for successful pinctrl change. Acked-by: NThierry Reding <treding@nvidia.com> Reviewed-by: NDmitry Osipenko <digetx@gmail.com> Signed-off-by: NSowjanya Komatineni <skomatineni@nvidia.com> Link: https://lore.kernel.org/r/1565984527-5272-2-git-send-email-skomatineni@nvidia.comSigned-off-by: NLinus Walleij <linus.walleij@linaro.org> Signed-off-by: NSasha Levin <sashal@kernel.org>
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