mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-11-01 17:08:10 +00:00
189 lines
4 KiB
C
189 lines
4 KiB
C
/*
|
|
* SH generic board support, using device tree
|
|
*
|
|
* Copyright (C) 2015-2016 Smart Energy Instruments, Inc.
|
|
*
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
|
* License. See the file "COPYING" in the main directory of this archive
|
|
* for more details.
|
|
*/
|
|
|
|
#include <linux/of.h>
|
|
#include <linux/of_fdt.h>
|
|
#include <linux/clocksource.h>
|
|
#include <linux/irqchip.h>
|
|
#include <linux/clk-provider.h>
|
|
#include <asm/machvec.h>
|
|
#include <asm/rtc.h>
|
|
|
|
#ifdef CONFIG_SMP
|
|
|
|
static void dummy_smp_setup(void)
|
|
{
|
|
}
|
|
|
|
static void dummy_prepare_cpus(unsigned int max_cpus)
|
|
{
|
|
}
|
|
|
|
static void dummy_start_cpu(unsigned int cpu, unsigned long entry_point)
|
|
{
|
|
}
|
|
|
|
static unsigned int dummy_smp_processor_id(void)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static void dummy_send_ipi(unsigned int cpu, unsigned int message)
|
|
{
|
|
}
|
|
|
|
static struct plat_smp_ops dummy_smp_ops = {
|
|
.smp_setup = dummy_smp_setup,
|
|
.prepare_cpus = dummy_prepare_cpus,
|
|
.start_cpu = dummy_start_cpu,
|
|
.smp_processor_id = dummy_smp_processor_id,
|
|
.send_ipi = dummy_send_ipi,
|
|
.cpu_die = native_cpu_die,
|
|
.cpu_disable = native_cpu_disable,
|
|
.play_dead = native_play_dead,
|
|
};
|
|
|
|
extern const struct of_cpu_method __cpu_method_of_table[];
|
|
const struct of_cpu_method __cpu_method_of_table_sentinel
|
|
__section(__cpu_method_of_table_end);
|
|
|
|
static void sh_of_smp_probe(void)
|
|
{
|
|
struct device_node *np = 0;
|
|
const char *method = 0;
|
|
const struct of_cpu_method *m = __cpu_method_of_table;
|
|
|
|
pr_info("SH generic board support: scanning for cpus\n");
|
|
|
|
init_cpu_possible(cpumask_of(0));
|
|
|
|
while ((np = of_find_node_by_type(np, "cpu"))) {
|
|
const __be32 *cell = of_get_property(np, "reg", NULL);
|
|
u64 id = -1;
|
|
if (cell) id = of_read_number(cell, of_n_addr_cells(np));
|
|
if (id < NR_CPUS) {
|
|
if (!method)
|
|
of_property_read_string(np, "enable-method", &method);
|
|
set_cpu_possible(id, true);
|
|
set_cpu_present(id, true);
|
|
__cpu_number_map[id] = id;
|
|
__cpu_logical_map[id] = id;
|
|
}
|
|
}
|
|
if (!method) {
|
|
np = of_find_node_by_name(NULL, "cpus");
|
|
of_property_read_string(np, "enable-method", &method);
|
|
}
|
|
|
|
pr_info("CPU enable method: %s\n", method);
|
|
if (method)
|
|
for (; m->method; m++)
|
|
if (!strcmp(m->method, method)) {
|
|
register_smp_ops(m->ops);
|
|
return;
|
|
}
|
|
|
|
register_smp_ops(&dummy_smp_ops);
|
|
}
|
|
|
|
#else
|
|
|
|
static void sh_of_smp_probe(void)
|
|
{
|
|
}
|
|
|
|
#endif
|
|
|
|
static void noop(void)
|
|
{
|
|
}
|
|
|
|
static int noopi(void)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static void __init sh_of_mem_reserve(void)
|
|
{
|
|
early_init_fdt_reserve_self();
|
|
early_init_fdt_scan_reserved_mem();
|
|
}
|
|
|
|
static void __init sh_of_time_init(void)
|
|
{
|
|
pr_info("SH generic board support: scanning for clocksource devices\n");
|
|
clocksource_probe();
|
|
}
|
|
|
|
static void __init sh_of_setup(char **cmdline_p)
|
|
{
|
|
struct device_node *root;
|
|
|
|
#ifdef CONFIG_USE_BUILTIN_DTB
|
|
unflatten_and_copy_device_tree();
|
|
#else
|
|
unflatten_device_tree();
|
|
#endif
|
|
|
|
board_time_init = sh_of_time_init;
|
|
|
|
sh_mv.mv_name = "Unknown SH model";
|
|
root = of_find_node_by_path("/");
|
|
if (root) {
|
|
of_property_read_string(root, "model", &sh_mv.mv_name);
|
|
of_node_put(root);
|
|
}
|
|
|
|
sh_of_smp_probe();
|
|
}
|
|
|
|
static int sh_of_irq_demux(int irq)
|
|
{
|
|
/* FIXME: eventually this should not be used at all;
|
|
* the interrupt controller should set_handle_irq(). */
|
|
return irq;
|
|
}
|
|
|
|
static void __init sh_of_init_irq(void)
|
|
{
|
|
pr_info("SH generic board support: scanning for interrupt controllers\n");
|
|
irqchip_init();
|
|
}
|
|
|
|
static int __init sh_of_clk_init(void)
|
|
{
|
|
#ifdef CONFIG_COMMON_CLK
|
|
/* Disabled pending move to COMMON_CLK framework. */
|
|
pr_info("SH generic board support: scanning for clk providers\n");
|
|
of_clk_init(NULL);
|
|
#endif
|
|
return 0;
|
|
}
|
|
|
|
static struct sh_machine_vector __initmv sh_of_generic_mv = {
|
|
.mv_setup = sh_of_setup,
|
|
.mv_name = "devicetree", /* replaced by DT root's model */
|
|
.mv_irq_demux = sh_of_irq_demux,
|
|
.mv_init_irq = sh_of_init_irq,
|
|
.mv_clk_init = sh_of_clk_init,
|
|
.mv_mode_pins = noopi,
|
|
.mv_mem_init = noop,
|
|
.mv_mem_reserve = sh_of_mem_reserve,
|
|
};
|
|
|
|
struct sh_clk_ops;
|
|
|
|
void __init arch_init_clk_ops(struct sh_clk_ops **ops, int idx)
|
|
{
|
|
}
|
|
|
|
void __init plat_irq_setup(void)
|
|
{
|
|
}
|