cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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fixed-factor.c (1931B)

      1/*
      2 * TI Fixed Factor Clock
      3 *
      4 * Copyright (C) 2013 Texas Instruments, Inc.
      5 *
      6 * Tero Kristo <t-kristo@ti.com>
      7 *
      8 * This program is free software; you can redistribute it and/or modify
      9 * it under the terms of the GNU General Public License version 2 as
     10 * published by the Free Software Foundation.
     11 *
     12 * This program is distributed "as is" WITHOUT ANY WARRANTY of any
     13 * kind, whether express or implied; without even the implied warranty
     14 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     15 * GNU General Public License for more details.
     16 */
     17
     18#include <linux/clk-provider.h>
     19#include <linux/slab.h>
     20#include <linux/err.h>
     21#include <linux/of.h>
     22#include <linux/of_address.h>
     23#include <linux/clk/ti.h>
     24
     25#include "clock.h"
     26
     27#undef pr_fmt
     28#define pr_fmt(fmt) "%s: " fmt, __func__
     29
     30/**
     31 * of_ti_fixed_factor_clk_setup - Setup function for TI fixed factor clock
     32 * @node: device node for this clock
     33 *
     34 * Sets up a simple fixed factor clock based on device tree info.
     35 */
     36static void __init of_ti_fixed_factor_clk_setup(struct device_node *node)
     37{
     38	struct clk *clk;
     39	const char *clk_name = ti_dt_clk_name(node);
     40	const char *parent_name;
     41	u32 div, mult;
     42	u32 flags = 0;
     43
     44	if (of_property_read_u32(node, "ti,clock-div", &div)) {
     45		pr_err("%pOFn must have a clock-div property\n", node);
     46		return;
     47	}
     48
     49	if (of_property_read_u32(node, "ti,clock-mult", &mult)) {
     50		pr_err("%pOFn must have a clock-mult property\n", node);
     51		return;
     52	}
     53
     54	if (of_property_read_bool(node, "ti,set-rate-parent"))
     55		flags |= CLK_SET_RATE_PARENT;
     56
     57	parent_name = of_clk_get_parent_name(node, 0);
     58
     59	clk = clk_register_fixed_factor(NULL, clk_name, parent_name, flags,
     60					mult, div);
     61
     62	if (!IS_ERR(clk)) {
     63		of_clk_add_provider(node, of_clk_src_simple_get, clk);
     64		of_ti_clk_autoidle_setup(node);
     65		ti_clk_add_alias(NULL, clk, clk_name);
     66	}
     67}
     68CLK_OF_DECLARE(ti_fixed_factor_clk, "ti,fixed-factor-clock",
     69	       of_ti_fixed_factor_clk_setup);