1f847c65fd
This behaves exactly in similar manner to basic fixed-factor-clock, but adds a few properties on top for handling clock hardware autoidling. Signed-off-by: Tero Kristo <t-kristo@ti.com> Acked-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Mike Turquette <mturquette@linaro.org>
66 lines
1.8 KiB
C
66 lines
1.8 KiB
C
/*
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* TI Fixed Factor Clock
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*
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* Copyright (C) 2013 Texas Instruments, Inc.
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*
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* Tero Kristo <t-kristo@ti.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed "as is" WITHOUT ANY WARRANTY of any
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* kind, whether express or implied; without even the implied warranty
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* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/clk-provider.h>
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#include <linux/slab.h>
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#include <linux/err.h>
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#include <linux/of.h>
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#include <linux/of_address.h>
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#include <linux/clk/ti.h>
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#undef pr_fmt
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#define pr_fmt(fmt) "%s: " fmt, __func__
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/**
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* of_ti_fixed_factor_clk_setup - Setup function for TI fixed factor clock
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* @node: device node for this clock
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*
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* Sets up a simple fixed factor clock based on device tree info.
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*/
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static void __init of_ti_fixed_factor_clk_setup(struct device_node *node)
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{
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struct clk *clk;
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const char *clk_name = node->name;
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const char *parent_name;
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u32 div, mult;
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u32 flags = 0;
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if (of_property_read_u32(node, "ti,clock-div", &div)) {
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pr_err("%s must have a clock-div property\n", node->name);
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return;
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}
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if (of_property_read_u32(node, "ti,clock-mult", &mult)) {
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pr_err("%s must have a clock-mult property\n", node->name);
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return;
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}
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if (of_property_read_bool(node, "ti,set-rate-parent"))
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flags |= CLK_SET_RATE_PARENT;
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parent_name = of_clk_get_parent_name(node, 0);
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clk = clk_register_fixed_factor(NULL, clk_name, parent_name, flags,
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mult, div);
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if (!IS_ERR(clk)) {
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of_clk_add_provider(node, of_clk_src_simple_get, clk);
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of_ti_clk_autoidle_setup(node);
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}
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}
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CLK_OF_DECLARE(ti_fixed_factor_clk, "ti,fixed-factor-clock",
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of_ti_fixed_factor_clk_setup);
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