linux-kernel - [PATCH] spi/pxa2xx: Restore private register bits.

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Message-Id: <1385662391-27573-1-git-send-email-chiau.ee.chew@intel.com>
Date:	Fri, 29 Nov 2013 02:13:11 +0800
From:	Chew Chiau Ee <chiau.ee.chew@...el.com>
To:	Eric Miao <eric.y.miao@...il.com>,
	Russell King <linux@....linux.org.uk>,
	Haojian Zhuang <haojian.zhuang@...il.com>,
	Mark Brown <broonie@...nel.org>
Cc:	linux-arm-kernel@...ts.infradead.org, linux-spi@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Mika Westerberg <mika.westerberg@...ux.intel.com>
Subject: [PATCH] spi/pxa2xx: Restore private register bits.

From: Chew, Chiau Ee <chiau.ee.chew@...el.com>

The Intel LPSS SPI private register bits have to be restored
when system resume from S3 suspend.

Signed-off-by: Chew, Chiau Ee <chiau.ee.chew@...el.com>
Acked-by: Mika Westerberg <mika.westerberg@...ux.intel.com>
---
 drivers/spi/spi-pxa2xx.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/drivers/spi/spi-pxa2xx.c b/drivers/spi/spi-pxa2xx.c
index 7028180..7765b19 100644
--- a/drivers/spi/spi-pxa2xx.c
+++ b/drivers/spi/spi-pxa2xx.c
@@ -1293,6 +1293,9 @@ static int pxa2xx_spi_resume(struct device *dev)
 	/* Enable the SSP clock */
 	clk_prepare_enable(ssp->clk);
 
+	/* Restore LPSS private register bits */
+	lpss_ssp_setup(drv_data);
+
 	/* Start the queue running */
 	status = spi_master_resume(drv_data->master);
 	if (status != 0) {
-- 
1.7.4.4

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