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/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* 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 <common.h>
#include <malloc.h>
#include <linux/clk.h>
#include <linux/err.h>
/*
* This represents the vexpress-osc as a fixed clock, which isn't really
* accurate, as this clock allows rate changes in real implementations. As those
* would need access to the config bus, a whole lot more infrastructure would be
* needed. We skip this complication for now, as we don't have a use-case, yet.
*/
static int vexpress_osc_setup(struct device_node *node)
{
struct clk *clk;
u32 range[2];
const char *name;
if (of_property_read_u32_array(node, "freq-range", range,
ARRAY_SIZE(range)))
return -EINVAL;
if (of_property_read_string(node, "clock-output-names", &name))
return -EINVAL;
clk = clk_fixed(name, range[0]);
if (IS_ERR(clk))
return PTR_ERR(clk);
return of_clk_add_provider(node, of_clk_src_simple_get, clk);
}
CLK_OF_DECLARE(vexpress_osc, "arm,vexpress-osc", vexpress_osc_setup);
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