From 3c3682a34cbbeaff8ef3ec9d6b9a8cbfb5f3b03b Mon Sep 17 00:00:00 2001
From: =?utf8?q?=E8=B0=A2=E4=BF=AE=E9=91=AB?= <xxx@rock-chips.com>
Date: Tue, 25 May 2010 14:24:18 +0000
Subject: [PATCH] add gpio expander pca9554 driver

---
 arch/arm/mach-rk2818/include/mach/board.h | 26 +++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/arch/arm/mach-rk2818/include/mach/board.h b/arch/arm/mach-rk2818/include/mach/board.h
index d98c1f56825a..0f0f666246b6 100644
--- a/arch/arm/mach-rk2818/include/mach/board.h
+++ b/arch/arm/mach-rk2818/include/mach/board.h
@@ -74,6 +74,32 @@ struct rk2818bl_info{
     struct notifier_block freq_transition;
 };
 
+struct rk2818_gpio_expander_info {
+	unsigned int gpio_num;// ³õʼ»¯µÄpin ½Åºê¶¨Òå È磺RK2818_PIN_PI0
+	unsigned int pin_type;//³õʼ»¯µÄpin ΪÊäÈëpin»¹ÊÇÊä³öpin È磺GPIO_IN
+	unsigned int pin_value;//Èç¹ûΪ output pin ÉèÖõçƽ£¬È磺GPIO_HIGH
+};
+
+
+struct pca9554_platform_data {
+	/*  the first extern gpio number in all of gpio groups */
+	unsigned gpio_base;
+	unsigned	gpio_pin_num;
+	/*  the first gpio irq  number in all of irq source */
+
+	unsigned gpio_irq_start;
+	unsigned irq_pin_num;        //ÖжϵĸöÊý
+	unsigned    pca9954_irq_pin;        //À©Õ¹IOµÄÖжϹÒÔÚÄĸögpio
+	/* initial polarity inversion setting */
+	uint16_t	invert;
+	struct rk2818_gpio_expander_info  *settinginfo;
+	int  settinginfolen;
+	void		*context;	/* param to setup/teardown */
+
+	int		(*setup)(struct i2c_client *client,unsigned gpio, unsigned ngpio,void *context);
+	int		(*teardown)(struct i2c_client *client,unsigned gpio, unsigned ngpio,void *context);
+	char		**names;
+};
 /* common init routines for use by arch/arm/mach-msm/board-*.c */
 void __init rk2818_add_devices(void);
 void __init rk2818_map_common_io(void);
-- 
2.34.1