linux-kernel - [PATCH 2/2] mfd: wm8994: Also restore GPIO IRQ masks after reset

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Date:	Fri, 29 Jun 2012 14:55:40 +0100
From:	Mark Brown <broonie@...nsource.wolfsonmicro.com>
To:	Samuel Ortiz <sameo@...ux.intel.com>
Cc:	linux-kernel@...r.kernel.org, patches@...nsource.wolfsonmicro.com,
	Mark Brown <broonie@...nsource.wolfsonmicro.com>
Subject: [PATCH 2/2] mfd: wm8994: Also restore GPIO IRQ masks after reset

This ensures that if we are using a GPIO as a wake source it continues to
function while we're suspended.

Signed-off-by: Mark Brown <broonie@...nsource.wolfsonmicro.com>
---
 drivers/mfd/wm8994-core.c |    7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/mfd/wm8994-core.c b/drivers/mfd/wm8994-core.c
index 53293c7..eec74aa 100644
--- a/drivers/mfd/wm8994-core.c
+++ b/drivers/mfd/wm8994-core.c
@@ -293,6 +293,13 @@ static int wm8994_suspend(struct device *dev)
 	if (ret != 0)
 		dev_err(dev, "Failed to restore GPIO registers: %d\n", ret);
 
+	/* In case one of the GPIOs is used as a wake input. */
+	ret = regcache_sync_region(wm8994->regmap,
+				   WM8994_INTERRUPT_STATUS_1_MASK,
+				   WM8994_INTERRUPT_STATUS_1_MASK);
+	if (ret != 0)
+		dev_err(dev, "Failed to restore interrupt mask: %d\n", ret);
+
 	regcache_cache_only(wm8994->regmap, true);
 	wm8994->suspended = true;
 
-- 
1.7.10

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