1 files changed, 19 insertions, 1 deletions

diff --git a/include/linux/amba/bus.h b/include/linux/amba/bus.h
index ab94335b4bb9..b0c174012436 100644
--- a/include/linux/amba/bus.h
+++ b/include/linux/amba/bus.h
@@ -1,5 +1,9 @@
 /*
- *  linux/include/asm-arm/hardware/amba.h
+ *  linux/include/amba/bus.h
+ *
+ *  This device type deals with ARM PrimeCells and anything else that
+ *  presents a proper CID (0xB105F00D) at the end of the I/O register
+ *  region or that is derived from a PrimeCell.
  *
  *  Copyright (C) 2003 Deep Blue Solutions Ltd, All Rights Reserved.
  *
@@ -10,11 +14,19 @@
 #ifndef ASMARM_AMBA_H
 #define ASMARM_AMBA_H
 
+#include <linux/clk.h>
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/resource.h>
+
 #define AMBA_NR_IRQS    2
 
+struct clk;
+
 struct amba_device {
         struct device           dev;
         struct resource         res;
+        struct clk              *pclk;
         u64                     dma_mask;
         unsigned int            periphid;
         unsigned int            irq[AMBA_NR_IRQS];
@@ -52,6 +64,12 @@ struct amba_device *amba_find_device(const char *, struct device *, unsigned int
 int amba_request_regions(struct amba_device *, const char *);
 void amba_release_regions(struct amba_device *);
 
+#define amba_pclk_enable(d)     \
+        (IS_ERR((d)->pclk) ? 0 : clk_enable((d)->pclk))
+
+#define amba_pclk_disable(d)    \
+        do { if (!IS_ERR((d)->pclk)) clk_disable((d)->pclk); } while (0)
+
 #define amba_config(d)  (((d)->periphid >> 24) & 0xff)
 #define amba_rev(d)     (((d)->periphid >> 20) & 0x0f)
 #define amba_manf(d)    (((d)->periphid >> 12) & 0xff)