1aaf9128aSKuninori Morimoto // SPDX-License-Identifier: GPL-2.0
27480e0aaSRich Felker /*
37480e0aaSRich Felker * SH generic board support, using device tree
47480e0aaSRich Felker *
57480e0aaSRich Felker * Copyright (C) 2015-2016 Smart Energy Instruments, Inc.
67480e0aaSRich Felker */
77480e0aaSRich Felker
87480e0aaSRich Felker #include <linux/of.h>
916a30ba1SGeert Uytterhoeven #include <linux/of_clk.h>
107480e0aaSRich Felker #include <linux/of_fdt.h>
117480e0aaSRich Felker #include <linux/clocksource.h>
127480e0aaSRich Felker #include <linux/irqchip.h>
137480e0aaSRich Felker #include <asm/machvec.h>
147480e0aaSRich Felker #include <asm/rtc.h>
157480e0aaSRich Felker
16044b81f8SRich Felker #ifdef CONFIG_SMP
17044b81f8SRich Felker
dummy_smp_setup(void)18044b81f8SRich Felker static void dummy_smp_setup(void)
19044b81f8SRich Felker {
20044b81f8SRich Felker }
21044b81f8SRich Felker
dummy_prepare_cpus(unsigned int max_cpus)22044b81f8SRich Felker static void dummy_prepare_cpus(unsigned int max_cpus)
23044b81f8SRich Felker {
24044b81f8SRich Felker }
25044b81f8SRich Felker
dummy_start_cpu(unsigned int cpu,unsigned long entry_point)26044b81f8SRich Felker static void dummy_start_cpu(unsigned int cpu, unsigned long entry_point)
27044b81f8SRich Felker {
28044b81f8SRich Felker }
29044b81f8SRich Felker
dummy_smp_processor_id(void)30044b81f8SRich Felker static unsigned int dummy_smp_processor_id(void)
31044b81f8SRich Felker {
32044b81f8SRich Felker return 0;
33044b81f8SRich Felker }
34044b81f8SRich Felker
dummy_send_ipi(unsigned int cpu,unsigned int message)35044b81f8SRich Felker static void dummy_send_ipi(unsigned int cpu, unsigned int message)
36044b81f8SRich Felker {
37044b81f8SRich Felker }
38044b81f8SRich Felker
39044b81f8SRich Felker static struct plat_smp_ops dummy_smp_ops = {
40044b81f8SRich Felker .smp_setup = dummy_smp_setup,
41044b81f8SRich Felker .prepare_cpus = dummy_prepare_cpus,
42044b81f8SRich Felker .start_cpu = dummy_start_cpu,
43044b81f8SRich Felker .smp_processor_id = dummy_smp_processor_id,
44044b81f8SRich Felker .send_ipi = dummy_send_ipi,
45044b81f8SRich Felker .cpu_die = native_cpu_die,
46044b81f8SRich Felker .cpu_disable = native_cpu_disable,
47044b81f8SRich Felker .play_dead = native_play_dead,
48044b81f8SRich Felker };
49044b81f8SRich Felker
50044b81f8SRich Felker extern const struct of_cpu_method __cpu_method_of_table[];
51044b81f8SRich Felker const struct of_cpu_method __cpu_method_of_table_sentinel
5233def849SJoe Perches __section("__cpu_method_of_table_end");
53044b81f8SRich Felker
sh_of_smp_probe(void)54044b81f8SRich Felker static void sh_of_smp_probe(void)
55044b81f8SRich Felker {
5682f7c510SDmitry Torokhov struct device_node *np;
5782f7c510SDmitry Torokhov const char *method = NULL;
58044b81f8SRich Felker const struct of_cpu_method *m = __cpu_method_of_table;
59044b81f8SRich Felker
60044b81f8SRich Felker pr_info("SH generic board support: scanning for cpus\n");
61044b81f8SRich Felker
62044b81f8SRich Felker init_cpu_possible(cpumask_of(0));
63044b81f8SRich Felker
648cabf5bcSRob Herring for_each_of_cpu_node(np) {
65*ada03c68SRob Herring u64 id = of_get_cpu_hwid(np, 0);
66*ada03c68SRob Herring
67044b81f8SRich Felker if (id < NR_CPUS) {
68044b81f8SRich Felker if (!method)
69044b81f8SRich Felker of_property_read_string(np, "enable-method", &method);
70044b81f8SRich Felker set_cpu_possible(id, true);
71044b81f8SRich Felker set_cpu_present(id, true);
72044b81f8SRich Felker __cpu_number_map[id] = id;
73044b81f8SRich Felker __cpu_logical_map[id] = id;
74044b81f8SRich Felker }
75044b81f8SRich Felker }
76044b81f8SRich Felker if (!method) {
77044b81f8SRich Felker np = of_find_node_by_name(NULL, "cpus");
78044b81f8SRich Felker of_property_read_string(np, "enable-method", &method);
7982f7c510SDmitry Torokhov of_node_put(np);
80044b81f8SRich Felker }
81044b81f8SRich Felker
82044b81f8SRich Felker pr_info("CPU enable method: %s\n", method);
83044b81f8SRich Felker if (method)
84044b81f8SRich Felker for (; m->method; m++)
85044b81f8SRich Felker if (!strcmp(m->method, method)) {
86044b81f8SRich Felker register_smp_ops(m->ops);
87044b81f8SRich Felker return;
88044b81f8SRich Felker }
89044b81f8SRich Felker
90044b81f8SRich Felker register_smp_ops(&dummy_smp_ops);
91044b81f8SRich Felker }
92044b81f8SRich Felker
93044b81f8SRich Felker #else
94044b81f8SRich Felker
sh_of_smp_probe(void)95044b81f8SRich Felker static void sh_of_smp_probe(void)
96044b81f8SRich Felker {
97044b81f8SRich Felker }
98044b81f8SRich Felker
99044b81f8SRich Felker #endif
100044b81f8SRich Felker
noop(void)1017480e0aaSRich Felker static void noop(void)
1027480e0aaSRich Felker {
1037480e0aaSRich Felker }
1047480e0aaSRich Felker
noopi(void)1057480e0aaSRich Felker static int noopi(void)
1067480e0aaSRich Felker {
1077480e0aaSRich Felker return 0;
1087480e0aaSRich Felker }
1097480e0aaSRich Felker
sh_of_mem_reserve(void)1107480e0aaSRich Felker static void __init sh_of_mem_reserve(void)
1117480e0aaSRich Felker {
1127480e0aaSRich Felker early_init_fdt_reserve_self();
1137480e0aaSRich Felker early_init_fdt_scan_reserved_mem();
1147480e0aaSRich Felker }
1157480e0aaSRich Felker
sh_of_setup(char ** cmdline_p)1167480e0aaSRich Felker static void __init sh_of_setup(char **cmdline_p)
1177480e0aaSRich Felker {
118190fe191SRich Felker struct device_node *root;
119190fe191SRich Felker
1207480e0aaSRich Felker sh_mv.mv_name = "Unknown SH model";
121190fe191SRich Felker root = of_find_node_by_path("/");
122190fe191SRich Felker if (root) {
123190fe191SRich Felker of_property_read_string(root, "model", &sh_mv.mv_name);
124190fe191SRich Felker of_node_put(root);
125190fe191SRich Felker }
1267480e0aaSRich Felker
127044b81f8SRich Felker sh_of_smp_probe();
1287480e0aaSRich Felker }
1297480e0aaSRich Felker
sh_of_irq_demux(int irq)1307480e0aaSRich Felker static int sh_of_irq_demux(int irq)
1317480e0aaSRich Felker {
1327480e0aaSRich Felker /* FIXME: eventually this should not be used at all;
1337480e0aaSRich Felker * the interrupt controller should set_handle_irq(). */
1347480e0aaSRich Felker return irq;
1357480e0aaSRich Felker }
1367480e0aaSRich Felker
sh_of_init_irq(void)1377480e0aaSRich Felker static void __init sh_of_init_irq(void)
1387480e0aaSRich Felker {
1397480e0aaSRich Felker pr_info("SH generic board support: scanning for interrupt controllers\n");
1407480e0aaSRich Felker irqchip_init();
1417480e0aaSRich Felker }
1427480e0aaSRich Felker
sh_of_clk_init(void)1437480e0aaSRich Felker static int __init sh_of_clk_init(void)
1447480e0aaSRich Felker {
1457480e0aaSRich Felker #ifdef CONFIG_COMMON_CLK
1467480e0aaSRich Felker /* Disabled pending move to COMMON_CLK framework. */
1477480e0aaSRich Felker pr_info("SH generic board support: scanning for clk providers\n");
1487480e0aaSRich Felker of_clk_init(NULL);
1497480e0aaSRich Felker #endif
1507480e0aaSRich Felker return 0;
1517480e0aaSRich Felker }
1527480e0aaSRich Felker
1537480e0aaSRich Felker static struct sh_machine_vector __initmv sh_of_generic_mv = {
1547480e0aaSRich Felker .mv_setup = sh_of_setup,
1557480e0aaSRich Felker .mv_name = "devicetree", /* replaced by DT root's model */
1567480e0aaSRich Felker .mv_irq_demux = sh_of_irq_demux,
1577480e0aaSRich Felker .mv_init_irq = sh_of_init_irq,
1587480e0aaSRich Felker .mv_clk_init = sh_of_clk_init,
1597480e0aaSRich Felker .mv_mode_pins = noopi,
1607480e0aaSRich Felker .mv_mem_init = noop,
1617480e0aaSRich Felker .mv_mem_reserve = sh_of_mem_reserve,
1627480e0aaSRich Felker };
1637480e0aaSRich Felker
1647480e0aaSRich Felker struct sh_clk_ops;
1657480e0aaSRich Felker
arch_init_clk_ops(struct sh_clk_ops ** ops,int idx)166acaf892eSRandy Dunlap void __init __weak arch_init_clk_ops(struct sh_clk_ops **ops, int idx)
1677480e0aaSRich Felker {
1687480e0aaSRich Felker }
1697480e0aaSRich Felker
plat_irq_setup(void)170acaf892eSRandy Dunlap void __init __weak plat_irq_setup(void)
1717480e0aaSRich Felker {
1727480e0aaSRich Felker }
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