ARM: socfpga: dts: Add gate-clock bindings

Add bindings for "socfpga-gate-clk" clocks. These clocks directly feed
the peripherals.

Signed-off-by: Dinh Nguyen <dinguyen@altera.com>
Reviewed-by: Pavel Machek <pavel@denx.de>
CC: Arnd Bergmann <arnd@arndb.de>
CC: Olof Johansson <olof@lixom.net>
Cc: Pavel Machek <pavel@denx.de>
CC: <linux@arm.linux.org.uk>
Signed-off-by: Olof Johansson <olof@lixom.net>

1 files changed, 7 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/clock/altr_socfpga.txt b/Documentation/devicetree/bindings/clock/altr_socfpga.txt
index bd0c8416a5c8..0045433eae1f 100644
--- a/Documentation/devicetree/bindings/clock/altr_socfpga.txt
+++ b/Documentation/devicetree/bindings/clock/altr_socfpga.txt
@@ -9,6 +9,9 @@ Required properties:
 	"altr,socfpga-pll-clock" - for a PLL clock
 	"altr,socfpga-perip-clock" - The peripheral clock divided from the
 		PLL clock.
+	"altr,socfpga-gate-clk" - Clocks that directly feed peripherals and
+		can get gated.
+
 - reg : shall be the control register offset from CLOCK_MANAGER's base for the clock.
 - clocks : shall be the input parent clock phandle for the clock. This is
 	either an oscillator or a pll output.
@@ -16,3 +19,7 @@ Required properties:
 
 Optional properties:
 - fixed-divider : If clocks have a fixed divider value, use this property.
+- clk-gate : For "socfpga-gate-clk", clk-gate contains the gating register
+        and the bit index.
+- div-reg : For "socfpga-gate-clk", div-reg contains the divider register, bit shift,
+        and width.