linux-kernel - [PATCH 2/3] i2c: pxa: support hardware lock

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Message-Id: <1303963358-4652-2-git-send-email-haojian.zhuang@gmail.com>
Date:	Thu, 28 Apr 2011 12:02:37 +0800
From:	Haojian Zhuang <haojian.zhuang@...il.com>
To:	haojian.zhuang@...vell.com, eric.y.miao@...il.com,
	linux@....linux.org.uk, linux-arm-kernel@...ts.infradead.org,
	ben-linux@...ff.org, linux-i2c@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc:	Haojian Zhuang <haojian.zhuang@...il.com>
Subject: [PATCH 2/3] i2c: pxa: support hardware lock

Append hardware lock support since it's required by Marvell PXA910.

Signed-off-by: Haojian Zhuang <haojian.zhuang@...il.com>
Cc: Ben Dooks <ben-linux@...ff.org>
---
 drivers/i2c/busses/i2c-pxa.c |    3 +++
 include/linux/i2c/pxa-i2c.h  |    3 +++
 2 files changed, 6 insertions(+), 0 deletions(-)

diff --git a/drivers/i2c/busses/i2c-pxa.c b/drivers/i2c/busses/i2c-pxa.c
index cab529d..e9a5dd8 100644
--- a/drivers/i2c/busses/i2c-pxa.c
+++ b/drivers/i2c/busses/i2c-pxa.c
@@ -1120,6 +1120,9 @@ static int i2c_pxa_probe(struct platform_device *dev)
 
 	if (plat) {
 		i2c->adap.class = plat->class;
+		i2c->adap.hardware_lock = plat->hardware_lock;
+		i2c->adap.hardware_unlock = plat->hardware_unlock;
+		i2c->adap.hardware_trylock = plat->hardware_trylock;
 		i2c->use_pio = plat->use_pio;
 		i2c->fast_mode = plat->fast_mode;
 	}
diff --git a/include/linux/i2c/pxa-i2c.h b/include/linux/i2c/pxa-i2c.h
index 1a9f65e..eec9954 100644
--- a/include/linux/i2c/pxa-i2c.h
+++ b/include/linux/i2c/pxa-i2c.h
@@ -67,6 +67,9 @@ struct i2c_pxa_platform_data {
 	unsigned int		class;
 	unsigned int		use_pio :1;
 	unsigned int		fast_mode :1;
+	void			(*hardware_lock)(void);
+	void			(*hardware_unlock)(void);
+	int			(*hardware_trylock)(void);
 };
 
 extern void pxa_set_i2c_info(struct i2c_pxa_platform_data *info);
-- 
1.7.1

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