openwrt-archive/target/linux/sunxi/patches-4.1/162-clk-sunxi-codec-clock.patch

From 9b95732096c11d84bd0082aed0d575d8c09e3ab6 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Emilio=20L=C3=B3pez?= <emilio@elopez.com.ar>
Date: Fri, 18 Jul 2014 15:49:37 -0300
Subject: [PATCH] clk: sunxi: codec clock support
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The codec clock on sun4i, sun5i and sun7i is a simple gate with PLL2 as
parent.

Signed-off-by: Emilio López <emilio@elopez.com.ar>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
---
 drivers/clk/sunxi/Makefile        |  1 +
 drivers/clk/sunxi/clk-a10-codec.c | 41 +++++++++++++++++++++++++++++++++++++++
 2 files changed, 42 insertions(+)
 create mode 100644 drivers/clk/sunxi/clk-a10-codec.c

--- a/drivers/clk/sunxi/Makefile
+++ b/drivers/clk/sunxi/Makefile
@@ -3,6 +3,7 @@
 #
 
 obj-y += clk-sunxi.o clk-factors.o
+obj-y += clk-a10-codec.o
 obj-y += clk-a10-hosc.o
 obj-y += clk-a10-pll2.o
 obj-y += clk-a20-gmac.o
--- /dev/null
+++ b/drivers/clk/sunxi/clk-a10-codec.c
@@ -0,0 +1,41 @@
+/*
+ * Copyright 2013 Emilio López
+ *
+ * Emilio López <emilio@elopez.com.ar>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/clk-provider.h>
+#include <linux/clkdev.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+
+#define SUN4I_CODEC_GATE	31
+
+static void __init sun4i_codec_clk_setup(struct device_node *node)
+{
+	struct clk *clk;
+	const char *clk_name = node->name, *parent_name;
+	void __iomem *reg;
+
+	of_property_read_string(node, "clock-output-names", &clk_name);
+	parent_name = of_clk_get_parent_name(node, 0);
+	reg = of_iomap(node, 0);
+
+	clk = clk_register_gate(NULL, clk_name, parent_name,
+				CLK_SET_RATE_PARENT, reg,
+				SUN4I_CODEC_GATE, 0, NULL);
+
+	if (!IS_ERR(clk))
+		of_clk_add_provider(node, of_clk_src_simple_get, clk);
+}
+CLK_OF_DECLARE(sun4i_codec, "allwinner,sun4i-a10-codec-clk", sun4i_codec_clk_setup);