1 files changed, 43 insertions, 0 deletions
diff --git a/target/linux/sunxi/patches-4.4/100-clk-sunxi-add-dram-gates-support.patch b/target/linux/sunxi/patches-4.4/100-clk-sunxi-add-dram-gates-support.patch
new file mode 100644
index 0000000000..f9caaa014c
--- /dev/null
+++ b/target/linux/sunxi/patches-4.4/100-clk-sunxi-add-dram-gates-support.patch
@@ -0,0 +1,43 @@
+From 6d3a47c29186aa8d26ff05a6209c94291ace0696 Mon Sep 17 00:00:00 2001
+From: Chen-Yu Tsai <wens@csie.org>
+Date: Sat, 5 Dec 2015 21:16:42 +0800
+Subject: [PATCH] clk: sunxi: Add DRAM gates support for sun4i-a10
+
+The A10/A20 share the same set of DRAM clock gates, which controls
+direct memory access for some peripherals.
+
+On the A10, bit 15 controls the system's DRAM clock output (possibly
+to the DRAM chips), which we need to keep on.
+
+On the A20 this has been moved to the DRAM controller, becoming a no-op.
+However it is still listed in the user manual, so add it anyway.
+
+Signed-off-by: Chen-Yu Tsai <wens@csie.org>
+Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
+---
+ Documentation/devicetree/bindings/clock/sunxi.txt |  1 +
+ drivers/clk/sunxi/clk-simple-gates.c              | 12 ++++++++++++
+ 2 files changed, 13 insertions(+)
+
+diff --git a/Documentation/devicetree/bindings/clock/sunxi.txt b/Documentation/devicetree/bindings/clock/sunxi.txt
+index 153ac72..ef0b452 100644
+diff --git a/drivers/clk/sunxi/clk-simple-gates.c b/drivers/clk/sunxi/clk-simple-gates.c
+index c8acc06..f4da52b 100644
+--- a/drivers/clk/sunxi/clk-simple-gates.c
++++ b/drivers/clk/sunxi/clk-simple-gates.c
+@@ -160,3 +160,15 @@ CLK_OF_DECLARE(sun5i_a13_ahb, "allwinner,sun5i-a13-ahb-gates-clk",
+ 	       sun4i_a10_ahb_init);
+ CLK_OF_DECLARE(sun7i_a20_ahb, "allwinner,sun7i-a20-ahb-gates-clk",
+ 	       sun4i_a10_ahb_init);
++
++static const int sun4i_a10_dram_critical_clocks[] __initconst = {
++	15,	/* dram_output */
++};
++
++static void __init sun4i_a10_dram_init(struct device_node *node)
++{
++	sunxi_simple_gates_setup(node, sun4i_a10_dram_critical_clocks,
++				 ARRAY_SIZE(sun4i_a10_dram_critical_clocks));
++}
++CLK_OF_DECLARE(sun4i_a10_dram, "allwinner,sun4i-a10-dram-gates-clk",
++	       sun4i_a10_dram_init);