From: luowei <lw@rock-chips.com>
Date: Mon, 8 Oct 2012 06:07:57 +0000 (+0800)
Subject: rk30_phonepad:add get board id support
X-Git-Tag: firefly_0821_release~8483
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=3eabacc78b96ce5d1228230cb9896d5545ec4550;p=firefly-linux-kernel-4.4.55.git

rk30_phonepad:add get board id support
---

diff --git a/arch/arm/plat-rk/include/plat/board.h b/arch/arm/plat-rk/include/plat/board.h
old mode 100644
new mode 100755
index 6178c3231f75..7fe32464cc38
--- a/arch/arm/plat-rk/include/plat/board.h
+++ b/arch/arm/plat-rk/include/plat/board.h
@@ -186,6 +186,15 @@ struct sensor_platform_data {
 	int (*power_off)(void);
 };
 
+/* Platform data for the board id */
+struct board_id_platform_data {
+	int gpio_pin[32];
+	int num_gpio;
+	int (*init_platform_hw)(void);	
+	int (*exit_platform_hw)(void);	
+};
+
+
 
 struct goodix_platform_data {
 	int model ;
diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig
index cc7ab5426d26..b2d165feab47 100755
--- a/drivers/input/misc/Kconfig
+++ b/drivers/input/misc/Kconfig
@@ -329,6 +329,11 @@ config INPUT_GPIO
 	help
 	  Say Y here if you want to support gpio based keys, wheels etc...
 
+
+config RK_BOARD_ID
+	tristate "get board id support"
+
+
 config HP_SDC_RTC
 	tristate "HP SDC Real Time Clock"
 	depends on (GSC || HP300) && SERIO
diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile
index eaab936a0ada..93e4103aa35f 100755
--- a/drivers/input/misc/Makefile
+++ b/drivers/input/misc/Makefile
@@ -25,6 +25,7 @@ obj-$(CONFIG_INPUT_CMA3000_I2C)		+= cma3000_d0x_i2c.o
 obj-$(CONFIG_INPUT_COBALT_BTNS)		+= cobalt_btns.o
 obj-$(CONFIG_INPUT_DM355EVM)		+= dm355evm_keys.o
 obj-$(CONFIG_INPUT_GPIO)		+= gpio_event.o gpio_matrix.o gpio_input.o gpio_output.o gpio_axis.o
+obj-$(CONFIG_RK_BOARD_ID)		+= rk_board_id.o
 obj-$(CONFIG_HP_SDC_RTC)		+= hp_sdc_rtc.o
 obj-$(CONFIG_INPUT_IXP4XX_BEEPER)	+= ixp4xx-beeper.o
 obj-$(CONFIG_INPUT_KEYCHORD)		+= keychord.o
diff --git a/drivers/input/misc/rk_board_id.c b/drivers/input/misc/rk_board_id.c
new file mode 100644
index 000000000000..d1baf0a49084
--- /dev/null
+++ b/drivers/input/misc/rk_board_id.c
@@ -0,0 +1,135 @@
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/input.h>
+#include <linux/io.h>
+#include <linux/delay.h>
+#include <linux/i2c.h>
+#include <linux/skbuff.h>
+
+#include <mach/board.h>
+#include <mach/io.h>
+#include <mach/gpio.h>
+#include <mach/iomux.h>
+
+
+#if 0
+#define DBG(x...)  printk(x)
+#else
+#define DBG(x...)
+#endif
+
+struct board_id_private_data {
+	struct mutex id_mutex;
+	int board_id;
+	struct board_id_platform_data *pdata;
+};
+
+static struct board_id_private_data *g_id;
+
+
+int rk_get_board_id(void)
+{
+	struct board_id_private_data *id = g_id;
+	DBG("%s:id:0x%x\n",__func__,id->board_id);
+	return id->board_id;
+}
+EXPORT_SYMBOL(rk_get_board_id);
+
+static int _rk_get_board_id(struct board_id_private_data *id)
+{
+	int result = 0;
+	int value = 0;
+	int i = 0;
+	
+	id->board_id = -1;
+			
+	for(i=0; i<id->pdata->num_gpio; i++)
+	{
+		gpio_request(id->pdata->gpio_pin[i],"gpio_board_id");
+		gpio_direction_input(id->pdata->gpio_pin[i]);
+		gpio_pull_updown(id->pdata->gpio_pin[i], PullDisable);
+		value = gpio_get_value(id->pdata->gpio_pin[i]);
+		if(value < 0)
+			return value;
+		result = (value << i) | result;
+		
+		DBG("%s:gpio:%d,value:%d\n",__func__,id->pdata->gpio_pin[i],value);
+	}
+	
+	id->board_id = result;
+
+	
+	DBG("%s:num=%d,id=0x%x\n",__func__,id->pdata->num_gpio, id->board_id);
+
+	return result;
+}
+
+
+static int __devinit rk_board_id_probe(struct platform_device *pdev)
+{
+	struct board_id_platform_data *pdata = pdev->dev.platform_data;
+	struct board_id_private_data *id = NULL;
+	int result = 0;
+
+	if(!pdata)
+		return -ENOMEM;
+	
+	id = kzalloc(sizeof(struct board_id_private_data), GFP_KERNEL);
+	if (id == NULL) {
+		dev_err(&pdev->dev, "Unable to allocate private data\n");
+		return -ENOMEM;
+	}
+
+	id->pdata = pdata;
+	
+	if(pdata->init_platform_hw)
+		pdata->init_platform_hw();
+	
+	result = _rk_get_board_id(id);
+
+	if(pdata->exit_platform_hw)
+		pdata->exit_platform_hw();
+	
+	platform_set_drvdata(pdev, id);	
+	g_id = id;
+	
+	printk("%s:board id :0x%x\n",__func__,result);
+	return 0;
+}
+
+static int __devexit rk_board_id_remove(struct platform_device *pdev)
+{
+	//struct board_id_platform_data *pdata = pdev->dev.platform_data;
+	struct board_id_private_data *id = platform_get_drvdata(pdev);
+	
+	kfree(id);
+	
+	return 0;
+}
+
+static struct platform_driver rk_board_id_driver = {
+	.probe		= rk_board_id_probe,
+	.remove		= __devexit_p(rk_board_id_remove),
+	.driver		= {
+		.name	= "rk-board-id",
+		.owner	= THIS_MODULE,
+	},
+};
+
+static int __init rk_get_board_init(void)
+{
+	return platform_driver_register(&rk_board_id_driver);
+}
+
+static void __exit rk_get_board_exit(void)
+{
+	platform_driver_unregister(&rk_board_id_driver);
+}
+
+subsys_initcall_sync(rk_get_board_init);
+module_exit(rk_get_board_exit);
+
+MODULE_AUTHOR("ROCKCHIP Corporation:lw@rock-chips.com");
+MODULE_DESCRIPTION("Interface for get board id");
+MODULE_LICENSE("GPL");