[PATCH v8 02/21] pinctrl: tegra: Add write barrier after all pinctrl register writes

[Sowjanya Komatineni]

This patch adds write barrier after all pinctrl register writes
during resume to make sure all pinctrl changes are complete.

Signed-off-by: Sowjanya Komatineni <skomatineni@xxxxxxxxxx>
---
 drivers/pinctrl/tegra/pinctrl-tegra.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/pinctrl/tegra/pinctrl-tegra.c b/drivers/pinctrl/tegra/pinctrl-tegra.c
index 982ee634b3b1..f49fe29fb6df 100644
--- a/drivers/pinctrl/tegra/pinctrl-tegra.c
+++ b/drivers/pinctrl/tegra/pinctrl-tegra.c
@@ -677,6 +677,8 @@ static int tegra_pinctrl_resume(struct device *dev)
 			writel_relaxed(*backup_regs++, regs++);
 	}
 
+	/* make sure all the pinmux register writes are complete */
+	wmb();
 	return 0;
 }
 
-- 
2.7.4