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/*
* TI Fixed Factor Clock
*
* Copyright (C) 2013 Texas Instruments, Inc.
*
* Tero Kristo <t-kristo@ti.com>
*
* 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 "as is" WITHOUT ANY WARRANTY of any
* kind, whether express or implied; 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/slab.h>
#include <linux/err.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/clk/ti.h>
#include "clock.h"
#undef pr_fmt
#define pr_fmt(fmt) "%s: " fmt, __func__
/**
* of_ti_fixed_factor_clk_setup - Setup function for TI fixed factor clock
* @node: device node for this clock
*
* Sets up a simple fixed factor clock based on device tree info.
*/
static void __init of_ti_fixed_factor_clk_setup(struct device_node *node)
{
struct clk *clk;
const char *clk_name = ti_dt_clk_name(node);
const char *parent_name;
u32 div, mult;
u32 flags = 0;
if (of_property_read_u32(node, "ti,clock-div", &div)) {
pr_err("%pOFn must have a clock-div property\n", node);
return;
}
if (of_property_read_u32(node, "ti,clock-mult", &mult)) {
pr_err("%pOFn must have a clock-mult property\n", node);
return;
}
if (of_property_read_bool(node, "ti,set-rate-parent"))
flags |= CLK_SET_RATE_PARENT;
parent_name = of_clk_get_parent_name(node, 0);
clk = clk_register_fixed_factor(NULL, clk_name, parent_name, flags,
mult, div);
if (!IS_ERR(clk)) {
of_clk_add_provider(node, of_clk_src_simple_get, clk);
of_ti_clk_autoidle_setup(node);
ti_clk_add_alias(NULL, clk, clk_name);
}
}
CLK_OF_DECLARE(ti_fixed_factor_clk, "ti,fixed-factor-clock",
of_ti_fixed_factor_clk_setup);
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