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authorEmilio López <emilio@elopez.com.ar>2014-07-18 22:49:37 +0400
committerMaxime Ripard <maxime.ripard@free-electrons.com>2015-10-21 22:51:28 +0300
commite2771545f49fbfec874642533058a3423fa29e16 (patch)
tree13d88512ab374afa387804554ca87de90ff6c1be /drivers/clk
parenteb662f854710e6a438789a4b0d1d0cce8c12379d (diff)
downloadlinux-e2771545f49fbfec874642533058a3423fa29e16.tar.xz
clk: sunxi: codec clock support
The codec clock on sun4i, sun5i and sun7i is a simple gate with PLL2 as parent. Add a driver for such a clock. Signed-off-by: Emilio López <emilio@elopez.com.ar> Signed-off-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com> Reviewed-by: Chen-Yu Tsai <wens@csie.org>
Diffstat (limited to 'drivers/clk')
-rw-r--r--drivers/clk/sunxi/Makefile1
-rw-r--r--drivers/clk/sunxi/clk-a10-codec.c44
2 files changed, 45 insertions, 0 deletions
diff --git a/drivers/clk/sunxi/Makefile b/drivers/clk/sunxi/Makefile
index c658a18ba7cb..70a449a419e6 100644
--- 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
diff --git a/drivers/clk/sunxi/clk-a10-codec.c b/drivers/clk/sunxi/clk-a10-codec.c
new file mode 100644
index 000000000000..ac321d6a0df5
--- /dev/null
+++ b/drivers/clk/sunxi/clk-a10-codec.c
@@ -0,0 +1,44 @@
+/*
+ * 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/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;
+
+ reg = of_io_request_and_map(node, 0, of_node_full_name(node));
+ if (IS_ERR(reg))
+ return;
+
+ of_property_read_string(node, "clock-output-names", &clk_name);
+ parent_name = of_clk_get_parent_name(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);