69 lines
1.8 KiB
C
69 lines
1.8 KiB
C
|
/*
|
||
|
|
* 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 = node->name;
|
||
|
|
const char *parent_name;
|
||
|
|
u32 div, mult;
|
||
|
|
u32 flags = 0;
|
||
|
|
|
||
|
|
if (of_property_read_u32(node, "ti,clock-div", &div)) {
|
||
|
|
pr_err("%s must have a clock-div property\n", node->name);
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (of_property_read_u32(node, "ti,clock-mult", &mult)) {
|
||
|
|
pr_err("%s must have a clock-mult property\n", node->name);
|
||
|
|
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);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
CLK_OF_DECLARE(ti_fixed_factor_clk, "ti,fixed-factor-clock",
|
||
|
|
of_ti_fixed_factor_clk_setup);
|