Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / arch / arm / plat-samsung / wakeup-mask.c

diff --git a/kernel/arch/arm/plat-samsung/wakeup-mask.c b/kernel/arch/arm/plat-samsung/wakeup-mask.c
new file mode 100644 (file)
index 0000000..20c3d91
--- /dev/null
+++ b/kernel/arch/arm/plat-samsung/wakeup-mask.c
@@ -0,0 +1,47 @@
+/* arch/arm/plat-samsung/wakeup-mask.c
+ *
+ * Copyright 2010 Ben Dooks <ben-linux@fluff.org>
+ *
+ * Support for wakeup mask interrupts on newer SoCs
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+*/
+
+#include <linux/kernel.h>
+#include <linux/spinlock.h>
+#include <linux/device.h>
+#include <linux/types.h>
+#include <linux/irq.h>
+#include <linux/io.h>
+
+#include <plat/wakeup-mask.h>
+#include <plat/pm.h>
+
+void samsung_sync_wakemask(void __iomem *reg,
+                          struct samsung_wakeup_mask *mask, int nr_mask)
+{
+       struct irq_data *data;
+       u32 val;
+
+       val = __raw_readl(reg);
+
+       for (; nr_mask > 0; nr_mask--, mask++) {
+               if (mask->irq == NO_WAKEUP_IRQ) {
+                       val |= mask->bit;
+                       continue;
+               }
+
+               data = irq_get_irq_data(mask->irq);
+
+               /* bit of a liberty to read this directly from irq_data. */
+               if (irqd_is_wakeup_set(data))
+                       val &= ~mask->bit;
+               else
+                       val |= mask->bit;
+       }
+
+       printk(KERN_INFO "wakemask %08x => %08x\n", __raw_readl(reg), val);
+       __raw_writel(val, reg);
+}