Lines Matching +full:composite +full:- +full:divider +full:- +full:clock

1 // SPDX-License-Identifier: GPL-2.0
3  * Copyright (C) 2015 Chen-Yu Tsai
5  * Chen-Yu Tsai <wens@csie.org>
7  * Allwinner A80 CPUS clock driver
12 #include <linux/clk-provider.h>
57 	reg = readl(cpus->reg);  in sun9i_a80_cpus_clk_recalc_rate()
59 	/* apply pre-divider first if parent is pll4 */  in sun9i_a80_cpus_clk_recalc_rate()
63 	/* clk divider */  in sun9i_a80_cpus_clk_recalc_rate()
75 	 * clock can only divide, so we will never be able to achieve  in sun9i_a80_cpus_clk_round()
83 	/* calculate pre-divider if parent is pll4 */  in sun9i_a80_cpus_clk_round()
85 		/* pre-divider is 1 ~ 32 */  in sun9i_a80_cpus_clk_round()
101 	/* we were asked to pass back divider values */  in sun9i_a80_cpus_clk_round()
103 		*divp = div - 1;  in sun9i_a80_cpus_clk_round()
104 		*pre_divp = pre_div - 1;  in sun9i_a80_cpus_clk_round()
116 	unsigned long rate = req->rate;  in sun9i_a80_cpus_clk_determine_rate()
140 		return -EINVAL;  in sun9i_a80_cpus_clk_determine_rate()
142 	req->best_parent_hw = best_parent;  in sun9i_a80_cpus_clk_determine_rate()
143 	req->best_parent_rate = best;  in sun9i_a80_cpus_clk_determine_rate()
144 	req->rate = best_child_rate;  in sun9i_a80_cpus_clk_determine_rate()
159 	reg = readl(cpus->reg);  in sun9i_a80_cpus_clk_set_rate()
161 	/* need to know which parent is used to apply pre-divider */  in sun9i_a80_cpus_clk_set_rate()
167 	writel(reg, cpus->reg);  in sun9i_a80_cpus_clk_set_rate()
181  * sun9i_a80_cpus_setup() - Setup function for a80 cpus composite clk
182  * @node: &struct device_node for the clock
186 	const char *clk_name = node->name;  in sun9i_a80_cpus_setup()
198 	cpus->reg = of_io_request_and_map(node, 0, of_node_full_name(node));  in sun9i_a80_cpus_setup()
199 	if (IS_ERR(cpus->reg))  in sun9i_a80_cpus_setup()
202 	of_property_read_string(node, "clock-output-names", &clk_name);  in sun9i_a80_cpus_setup()
211 	/* set up clock properties */  in sun9i_a80_cpus_setup()
212 	mux->reg = cpus->reg;  in sun9i_a80_cpus_setup()
213 	mux->shift = SUN9I_CPUS_MUX_SHIFT;  in sun9i_a80_cpus_setup()
214 	/* un-shifted mask is what mux_clk expects */  in sun9i_a80_cpus_setup()
215 	mux->mask = SUN9I_CPUS_MUX_MASK >> SUN9I_CPUS_MUX_SHIFT;  in sun9i_a80_cpus_setup()
216 	mux->lock = &sun9i_a80_cpus_lock;  in sun9i_a80_cpus_setup()
219 				     &mux->hw, &clk_mux_ops,  in sun9i_a80_cpus_setup()
220 				     &cpus->hw, &sun9i_a80_cpus_clk_ops,  in sun9i_a80_cpus_setup()
236 	iounmap(cpus->reg);  in sun9i_a80_cpus_setup()
242 CLK_OF_DECLARE(sun9i_a80_cpus, "allwinner,sun9i-a80-cpus-clk",