Improve shutdown code

arch/arm/mach-omap2/board-mapphone.c

@@ -1482,7 +1482,7 @@ u32 omap_pmic_voltage_ramp_delay(u8 srid, u8 target_vsel, u8 current_vsel)
 #define WARMRESET 1
 #define COLDRESET 0
 
-static unsigned long reset_status = COLDRESET ;
+static unsigned long reset_status = COLDRESET;
 static struct notifier_block mapphone_pm_reboot_notifier;
 
 /* Choose cold or warm reset
@@ -1555,6 +1555,73 @@ static struct notifier_block mapphone_pm_reboot_notifier = {
 };
 
 
+static struct proc_dir_entry *proc_entry;
+
+ssize_t reset_proc_read(char *page, char **start, off_t off, \
+   int count, int *eof, void *data)
+{
+	int len;
+    /* don't visit offset */
+	if (off > 0) {
+		*eof = 1;
+		return 0;
+	}
+	len = snprintf(page, sizeof(page), "%x\n", (unsigned int)reset_status);
+	return len;
+}
+
+ssize_t reset_proc_write(struct file *filp, const char __user *buff, \
+  unsigned long len, void *data)
+{
+#define MAX_UL_LEN 8
+	char k_buf[MAX_UL_LEN];
+	int count = min((unsigned long)MAX_UL_LEN, len);
+	int ret;
+
+	if (copy_from_user(k_buf, buff, count)) {
+		ret = -EFAULT;
+		goto err;
+	} else{
+		if (k_buf[0] == '0') {
+			reset_status = COLDRESET;
+			mapphone_pm_set_reset(1);
+			printk(KERN_ERR"switch to cold reset\n");
+		} else if (k_buf[0] == '1') {
+			reset_status = WARMRESET;
+			mapphone_pm_set_reset(0);
+			printk(KERN_ERR"switch to warm reset\n");
+		} else{
+			ret = -EFAULT;
+			goto err;
+		}
+		return count;
+	}
+err:
+	return ret;
+}
+
+static void  reset_proc_init(void)
+{
+	proc_entry = create_proc_entry("reset_proc", 0660, NULL);
+	if (proc_entry == NULL) {
+		printk(KERN_INFO"Couldn't create proc entry\n");
+	} else{
+		proc_entry->read_proc = reset_proc_read;
+		proc_entry->write_proc = reset_proc_write;
+		/* proc_entry->owner = THIS_MODULE; */
+	}
+}
+
+int __init warmreset_init(char *s)
+{
+	/* configure to warmreset */
+	reset_status = WARMRESET;
+	mapphone_pm_set_reset(0);
+	return 1;
+}
+__setup("warmreset_debug=", warmreset_init);
+
+
 /* must match value in drivers/w1/w1_family.h */
 #define W1_EEPROM_DS2502        0x89
 static struct omap2_hdq_platform_config mapphone_hdq_data = {
@@ -1705,6 +1772,7 @@ static void __init mapphone_bp_model_init(void)
 		clk_enable(clkp);
 #endif
 }
+static struct platform_driver cpcap_charger_connected_driver;
 
 static void mapphone_pm_power_off(void)
 {
@@ -1731,8 +1799,36 @@ static void __init mapphone_power_off_init(void)
 	omap_writew(0x1F, 0x480021D2);
 	pm_power_off = mapphone_pm_power_off;
 
+	platform_driver_register(&cpcap_charger_connected_driver);
 }
 
+static void mapphone_pm_reset(void)
+{
+	arch_reset('h', NULL);
+}
+
+static int cpcap_charger_connected_probe(struct platform_device *pdev)
+{
+	pm_power_off = mapphone_pm_reset;
+	return 0;
+}
+
+static int cpcap_charger_connected_remove(struct platform_device *pdev)
+{
+	pm_power_off = mapphone_pm_power_off;
+	return 0;
+}
+
+static struct platform_driver cpcap_charger_connected_driver = {
+	.probe		= cpcap_charger_connected_probe,
+	.remove		= cpcap_charger_connected_remove,
+	.driver		= {
+		.name	= "cpcap_charger_connected",
+		.owner	= THIS_MODULE,
+	},
+};
+
+
 static void __init mapphone_init(void)
 {
 	int ret = 0;
@@ -1777,6 +1873,7 @@ static void __init mapphone_init(void)
 	mapphone_sgx_init();
 	mapphone_power_off_init();
 	mapphone_sim_init();
+	reset_proc_init();
 }
 
 static void __init mapphone_reserve(void)