drivers/cpufreq/armada-8k-cpufreq.c

1 // SPDX-License-Identifier: GPL-2.0+
13 #include <linux/clk.h>
25  * Setup the opps list with the divider for the max frequency, that
38 static void __init armada_8k_get_sharing_cpus(struct clk *cur_clk,  in armada_8k_get_sharing_cpus()
45 		struct clk *clk;  in armada_8k_get_sharing_cpus()  local
53 		clk = clk_get(cpu_dev, 0);  in armada_8k_get_sharing_cpus()
54 		if (IS_ERR(clk)) {  in armada_8k_get_sharing_cpus()
57 			if (clk_is_match(clk, cur_clk))  in armada_8k_get_sharing_cpus()
60 			clk_put(clk);  in armada_8k_get_sharing_cpus()
65 static int __init armada_8k_add_opp(struct clk *clk, struct device *cpu_dev,  in armada_8k_add_opp()  argument
74 	cur_frequency = clk_get_rate(clk);  in armada_8k_add_opp()
76 		dev_err(cpu_dev, "Failed to get clock rate for this CPU\n");  in armada_8k_add_opp()
77 		return -EINVAL;  in armada_8k_add_opp()
108 			 * A 0Hz frequency is not valid, this meant  in armada_8k_cpufreq_free_table()
130 	node = of_find_compatible_node(NULL, NULL, "marvell,ap806-cpu-clock");  in armada_8k_cpufreq_init()
133 		return -ENODEV;  in armada_8k_cpufreq_init()
140 		return -ENOMEM;  in armada_8k_cpufreq_init()
151 		struct clk *clk;  in armada_8k_cpufreq_init()  local
160 		clk = clk_get(cpu_dev, 0);  in armada_8k_cpufreq_init()
162 		if (IS_ERR(clk)) {  in armada_8k_cpufreq_init()
164 			ret = PTR_ERR(clk);  in armada_8k_cpufreq_init()
168 		ret = armada_8k_add_opp(clk, cpu_dev, freq_tables, opps_index);  in armada_8k_cpufreq_init()
170 			clk_put(clk);  in armada_8k_cpufreq_init()
176 		armada_8k_get_sharing_cpus(clk, &shared_cpus);  in armada_8k_cpufreq_init()
179 		clk_put(clk);  in armada_8k_cpufreq_init()
182 	armada_8k_pdev = platform_device_register_simple("cpufreq-dt", -1,  in armada_8k_cpufreq_init()