openwrt/target/linux/sunxi/patches-4.4/100-clk-sunxi-add-dram-gates-support.patch
Stijn Segers 215c1d05b8 kernel: update kernel 4.4 to 4.4.69
Bump the 17.01 tree kernel to 4.4.69. Trunk 4.4 and 17.01 4.4 have diverged, talked this
through with jow, he was okay with a clean diff against 17.01 and not a backported trunk
patch.

The following patches were applied upstream:

* 062-[1-6]-MIPS-* series
* 042-0004-mtd-bcm47xxpart-fix-parsing-first-block

Reintroduced lantiq/patches-4.4/0050-MIPS-Lantiq-Fix-cascaded-IRQ-setup, as
it was incorrectly included upstream thus dropped from LEDE, but subsequently
reverted upstream. Thanks to Kevin Darbyshire-Bryant for pointing me to it.

  Compile-tested on: ar71xx, ramips/mt7621, x86/64.

  Run-tested on: ar71xx, ramips/mt7621, x86/64.

Signed-off-by: Stijn Segers <francesco.borromini@inventati.org>
2017-05-24 22:47:01 +02:00

40 lines
1.5 KiB
Diff

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(+)
--- 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
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);