2 * SH generic board support, using device tree
4 * Copyright (C) 2015-2016 Smart Energy Instruments, Inc.
6 * This file is subject to the terms and conditions of the GNU General Public
7 * License. See the file "COPYING" in the main directory of this archive
12 #include <linux/of_fdt.h>
13 #include <linux/clocksource.h>
14 #include <linux/irqchip.h>
15 #include <linux/clk-provider.h>
16 #include <asm/machvec.h>
21 static void dummy_smp_setup(void)
25 static void dummy_prepare_cpus(unsigned int max_cpus)
29 static void dummy_start_cpu(unsigned int cpu, unsigned long entry_point)
33 static unsigned int dummy_smp_processor_id(void)
38 static void dummy_send_ipi(unsigned int cpu, unsigned int message)
42 static struct plat_smp_ops dummy_smp_ops = {
43 .smp_setup = dummy_smp_setup,
44 .prepare_cpus = dummy_prepare_cpus,
45 .start_cpu = dummy_start_cpu,
46 .smp_processor_id = dummy_smp_processor_id,
47 .send_ipi = dummy_send_ipi,
48 .cpu_die = native_cpu_die,
49 .cpu_disable = native_cpu_disable,
50 .play_dead = native_play_dead,
53 extern const struct of_cpu_method __cpu_method_of_table[];
54 const struct of_cpu_method __cpu_method_of_table_sentinel
55 __section(__cpu_method_of_table_end);
57 static void sh_of_smp_probe(void)
59 struct device_node *np = 0;
60 const char *method = 0;
61 const struct of_cpu_method *m = __cpu_method_of_table;
63 pr_info("SH generic board support: scanning for cpus\n");
65 init_cpu_possible(cpumask_of(0));
67 while ((np = of_find_node_by_type(np, "cpu"))) {
68 const __be32 *cell = of_get_property(np, "reg", NULL);
70 if (cell) id = of_read_number(cell, of_n_addr_cells(np));
73 of_property_read_string(np, "enable-method", &method);
74 set_cpu_possible(id, true);
75 set_cpu_present(id, true);
76 __cpu_number_map[id] = id;
77 __cpu_logical_map[id] = id;
81 np = of_find_node_by_name(NULL, "cpus");
82 of_property_read_string(np, "enable-method", &method);
85 pr_info("CPU enable method: %s\n", method);
87 for (; m->method; m++)
88 if (!strcmp(m->method, method)) {
89 register_smp_ops(m->ops);
93 register_smp_ops(&dummy_smp_ops);
98 static void sh_of_smp_probe(void)
104 static void noop(void)
108 static int noopi(void)
113 static void __init sh_of_mem_reserve(void)
115 early_init_fdt_reserve_self();
116 early_init_fdt_scan_reserved_mem();
119 static void __init sh_of_time_init(void)
121 pr_info("SH generic board support: scanning for clocksource devices\n");
125 static void __init sh_of_setup(char **cmdline_p)
127 struct device_node *root;
129 #ifdef CONFIG_USE_BUILTIN_DTB
130 unflatten_and_copy_device_tree();
132 unflatten_device_tree();
135 board_time_init = sh_of_time_init;
137 sh_mv.mv_name = "Unknown SH model";
138 root = of_find_node_by_path("/");
140 of_property_read_string(root, "model", &sh_mv.mv_name);
147 static int sh_of_irq_demux(int irq)
149 /* FIXME: eventually this should not be used at all;
150 * the interrupt controller should set_handle_irq(). */
154 static void __init sh_of_init_irq(void)
156 pr_info("SH generic board support: scanning for interrupt controllers\n");
160 static int __init sh_of_clk_init(void)
162 #ifdef CONFIG_COMMON_CLK
163 /* Disabled pending move to COMMON_CLK framework. */
164 pr_info("SH generic board support: scanning for clk providers\n");
170 static struct sh_machine_vector __initmv sh_of_generic_mv = {
171 .mv_setup = sh_of_setup,
172 .mv_name = "devicetree", /* replaced by DT root's model */
173 .mv_irq_demux = sh_of_irq_demux,
174 .mv_init_irq = sh_of_init_irq,
175 .mv_clk_init = sh_of_clk_init,
176 .mv_mode_pins = noopi,
178 .mv_mem_reserve = sh_of_mem_reserve,
183 void __init __weak arch_init_clk_ops(struct sh_clk_ops **ops, int idx)
187 void __init __weak plat_irq_setup(void)