Linux-libre 4.4-gnupck-4.4-gnu

1 files changed, 81 insertions, 0 deletions

diff --git a/drivers/clk/sunxi/clk-a10-mod1.c b/drivers/clk/sunxi/clk-a10-mod1.c
new file mode 100644
index 000000000..e9d870de1
--- /dev/null
+++ b/drivers/clk/sunxi/clk-a10-mod1.c
@@ -0,0 +1,81 @@
+/*
+ * 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>
+#include <linux/slab.h>
+
+static DEFINE_SPINLOCK(mod1_lock);
+
+#define SUN4I_MOD1_ENABLE	31
+#define SUN4I_MOD1_MUX		16
+#define SUN4I_MOD1_MUX_WIDTH	2
+#define SUN4I_MOD1_MAX_PARENTS	4
+
+static void __init sun4i_mod1_clk_setup(struct device_node *node)
+{
+	struct clk *clk;
+	struct clk_mux *mux;
+	struct clk_gate *gate;
+	const char *parents[4];
+	const char *clk_name = node->name;
+	void __iomem *reg;
+	int i;
+
+	reg = of_io_request_and_map(node, 0, of_node_full_name(node));
+	if (IS_ERR(reg))
+		return;
+
+	mux = kzalloc(sizeof(*mux), GFP_KERNEL);
+	if (!mux)
+		goto err_unmap;
+
+	gate = kzalloc(sizeof(*gate), GFP_KERNEL);
+	if (!gate)
+		goto err_free_mux;
+
+	of_property_read_string(node, "clock-output-names", &clk_name);
+	i = of_clk_parent_fill(node, parents, SUN4I_MOD1_MAX_PARENTS);
+
+	gate->reg = reg;
+	gate->bit_idx = SUN4I_MOD1_ENABLE;
+	gate->lock = &mod1_lock;
+	mux->reg = reg;
+	mux->shift = SUN4I_MOD1_MUX;
+	mux->mask = BIT(SUN4I_MOD1_MUX_WIDTH) - 1;
+	mux->lock = &mod1_lock;
+
+	clk = clk_register_composite(NULL, clk_name, parents, i,
+				     &mux->hw, &clk_mux_ops,
+				     NULL, NULL,
+				     &gate->hw, &clk_gate_ops, 0);
+	if (IS_ERR(clk))
+		goto err_free_gate;
+
+	of_clk_add_provider(node, of_clk_src_simple_get, clk);
+
+	return;
+
+err_free_gate:
+	kfree(gate);
+err_free_mux:
+	kfree(mux);
+err_unmap:
+	iounmap(reg);
+}
+CLK_OF_DECLARE(sun4i_mod1, "allwinner,sun4i-a10-mod1-clk",
+	       sun4i_mod1_clk_setup);