1 // SPDX-License-Identifier: GPL-2.0
6 #include <linux/clk-provider.h>
13  * DOC: basic fixed multiplier and divider clock that cannot gate
16  * prepare - clk_prepare only ensures that parents are prepared
17  * enable - clk_enable only ensures that parents are enabled
18  * rate - rate is fixed.  clk->rate = parent->rate / div * mult
19  * parent - fixed parent.  No clk_set_parent support
26 	unsigned long long int rate;  in clk_factor_recalc_rate()  local
28 	rate = (unsigned long long int)parent_rate * fix->mult;  in clk_factor_recalc_rate()
29 	do_div(rate, fix->div);  in clk_factor_recalc_rate()
30 	return (unsigned long)rate;  in clk_factor_recalc_rate()
33 static long clk_factor_round_rate(struct clk_hw *hw, unsigned long rate,  in clk_factor_round_rate()  argument
41 		best_parent = (rate / fix->mult) * fix->div;  in clk_factor_round_rate()
45 	return (*prate / fix->div) * fix->mult;  in clk_factor_round_rate()
48 static int clk_factor_set_rate(struct clk_hw *hw, unsigned long rate,  in clk_factor_set_rate()  argument
76 	clk_hw_unregister(&fix->hw);  in devm_clk_hw_register_fixed_factor_release()
94 		return ERR_PTR(-EINVAL);  in __clk_hw_register_fixed_factor()
102 		return ERR_PTR(-ENOMEM);  in __clk_hw_register_fixed_factor()
105 	fix->mult = mult;  in __clk_hw_register_fixed_factor()
106 	fix->div = div;  in __clk_hw_register_fixed_factor()
107 	fix->hw.init = &init;  in __clk_hw_register_fixed_factor()
120 	hw = &fix->hw;  in __clk_hw_register_fixed_factor()
138  * devm_clk_hw_register_fixed_factor_index - Register a fixed factor clock with
143  * @flags: fixed factor flags
147  * Return: Pointer to fixed factor clk_hw structure that was registered or
160  * devm_clk_hw_register_fixed_factor_parent_hw - Register a fixed factor clock with
165  * @flags: fixed factor flags
169  * Return: Pointer to fixed factor clk_hw structure that was registered or
177 					      -1, flags, mult, div, true);  in devm_clk_hw_register_fixed_factor_parent_hw()
186 					      parent_hw, -1, flags, mult, div,  in clk_hw_register_fixed_factor_parent_hw()
195 	return __clk_hw_register_fixed_factor(dev, NULL, name, parent_name, NULL, -1,  in clk_hw_register_fixed_factor()
210 	return hw->clk;  in clk_register_fixed_factor()
242 	return __clk_hw_register_fixed_factor(dev, NULL, name, parent_name, NULL, -1,  in devm_clk_hw_register_fixed_factor()
251 	const char *clk_name = node->name;  in _of_fixed_factor_clk_setup()
255 	if (of_property_read_u32(node, "clock-div", &div)) {  in _of_fixed_factor_clk_setup()
256 		pr_err("%s Fixed factor clock <%pOFn> must have a clock-div property\n",  in _of_fixed_factor_clk_setup()
258 		return ERR_PTR(-EIO);  in _of_fixed_factor_clk_setup()
261 	if (of_property_read_u32(node, "clock-mult", &mult)) {  in _of_fixed_factor_clk_setup()
262 		pr_err("%s Fixed factor clock <%pOFn> must have a clock-mult property\n",  in _of_fixed_factor_clk_setup()
264 		return ERR_PTR(-EIO);  in _of_fixed_factor_clk_setup()
267 	of_property_read_string(node, "clock-output-names", &clk_name);  in _of_fixed_factor_clk_setup()
290  * of_fixed_factor_clk_setup() - Setup function for simple fixed factor clock
297 CLK_OF_DECLARE(fixed_factor_clk, "fixed-factor-clock",
304 	of_clk_del_provider(pdev->dev.of_node);  in of_fixed_factor_clk_remove()
316 	clk = _of_fixed_factor_clk_setup(pdev->dev.of_node);  in of_fixed_factor_clk_probe()
326 	{ .compatible = "fixed-factor-clock" },