net: phy: add phy_interface_t bitmap support

Add support for a bitmap for phy interface modes, which includes:
- a macro to declare the interface bitmap
- an inline helper to zero the interface bitmap
- an inline helper to detect an empty interface bitmap
- an inline helper to do a bitwise AND operation on two interface
  bitmaps

Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>

1 files changed, 20 insertions, 0 deletions

diff --git a/include/linux/phy.h b/include/linux/phy.h
index 852743f07e3e..2e9b897d8872 100644
--- a/include/linux/phy.h
+++ b/include/linux/phy.h
@@ -151,6 +151,26 @@ typedef enum {
 	PHY_INTERFACE_MODE_MAX,
 } phy_interface_t;
 
+/* PHY interface mode bitmap handling */
+#define DECLARE_PHY_INTERFACE_MASK(name) \
+	DECLARE_BITMAP(name, PHY_INTERFACE_MODE_MAX)
+
+static inline void phy_interface_zero(unsigned long *intf)
+{
+	bitmap_zero(intf, PHY_INTERFACE_MODE_MAX);
+}
+
+static inline bool phy_interface_empty(const unsigned long *intf)
+{
+	return bitmap_empty(intf, PHY_INTERFACE_MODE_MAX);
+}
+
+static inline void phy_interface_and(unsigned long *dst, const unsigned long *a,
+				     const unsigned long *b)
+{
+	bitmap_and(dst, a, b, PHY_INTERFACE_MODE_MAX);
+}
+
 /*
  * phy_supported_speeds - return all speeds currently supported by a PHY device
  */