[PATCH] ARM: 2715/1: restore CPLD interrupts upon resume for Lubbock …

…and Mainstone

Patch from Nicolas Pitre

Without this some devices fail to work again after a suspend event.

Signed-off-by: Nicolas Pitre
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

arch/arm/mach-pxa/lubbock.c

@@ -15,6 +15,7 @@
 #include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/device.h>
+#include <linux/sysdev.h>
 #include <linux/major.h>
 #include <linux/fb.h>
 #include <linux/interrupt.h>
@@ -106,6 +107,35 @@ static void __init lubbock_init_irq(void)
 	set_irq_type(IRQ_GPIO(0), IRQT_FALLING);
 }
 
+#ifdef CONFIG_PM
+
+static int lubbock_irq_resume(struct sys_device *dev)
+{
+	LUB_IRQ_MASK_EN = lubbock_irq_enabled;
+	return 0;
+}
+
+static struct sysdev_class lubbock_irq_sysclass = {
+	set_kset_name("cpld_irq"),
+	.resume = lubbock_irq_resume,
+};
+
+static struct sys_device lubbock_irq_device = {
+	.cls = &lubbock_irq_sysclass,
+};
+
+static int __init lubbock_irq_device_init(void)
+{
+	int ret = sysdev_class_register(&lubbock_irq_sysclass);
+	if (ret == 0)
+		ret = sysdev_register(&lubbock_irq_device);
+	return ret;
+}
+
+device_initcall(lubbock_irq_device_init);
+
+#endif
+
 static int lubbock_udc_is_connected(void)
 {
 	return (LUB_MISC_RD & (1 << 9)) == 0;

arch/arm/mach-pxa/mainstone.c

@@ -15,6 +15,7 @@
 
 #include <linux/init.h>
 #include <linux/device.h>
+#include <linux/sysdev.h>
 #include <linux/interrupt.h>
 #include <linux/sched.h>
 #include <linux/bitops.h>
@@ -62,7 +63,6 @@ static struct irqchip mainstone_irq_chip = {
 	.unmask		= mainstone_unmask_irq,
 };
 
-
 static void mainstone_irq_handler(unsigned int irq, struct irqdesc *desc,
 				  struct pt_regs *regs)
 {
@@ -100,6 +100,35 @@ static void __init mainstone_init_irq(void)
 	set_irq_type(IRQ_GPIO(0), IRQT_FALLING);
 }
 
+#ifdef CONFIG_PM
+
+static int mainstone_irq_resume(struct sys_device *dev)
+{
+	MST_INTMSKENA = mainstone_irq_enabled;
+	return 0;
+}
+
+static struct sysdev_class mainstone_irq_sysclass = {
+	set_kset_name("cpld_irq"),
+	.resume = mainstone_irq_resume,
+};
+
+static struct sys_device mainstone_irq_device = {
+	.cls = &mainstone_irq_sysclass,
+};
+
+static int __init mainstone_irq_device_init(void)
+{
+	int ret = sysdev_class_register(&mainstone_irq_sysclass);
+	if (ret == 0)
+		ret = sysdev_register(&mainstone_irq_device);
+	return ret;
+}
+
+device_initcall(mainstone_irq_device_init);
+
+#endif
+
 
 static struct resource smc91x_resources[] = {
 	[0] = {