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69 lines
1.9 KiB
69 lines
1.9 KiB
/* |
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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 <[email protected]> |
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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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#include "clock.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("%pOFn must have a clock-div property\n", node); |
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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("%pOFn must have a clock-mult property\n", node); |
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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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ti_clk_add_alias(NULL, clk, clk_name); |
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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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