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9b0d0af145
Kernel now supports chained power-off handlers. Use do_kernel_power_off() that invokes chained power-off handlers. It also invokes legacy pm_power_off() for now, which will be removed once all drivers will be converted to the new sys-off API. Reviewed-by: Michał Mirosław <mirq-linux@rere.qmqm.pl> Signed-off-by: Dmitry Osipenko <dmitry.osipenko@collabora.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
96 lines
1.7 KiB
C
96 lines
1.7 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include <linux/pm.h>
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#include <linux/kexec.h>
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#include <linux/kernel.h>
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#include <linux/reboot.h>
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#include <linux/module.h>
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#include <asm/watchdog.h>
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#include <asm/addrspace.h>
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#include <asm/reboot.h>
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#include <asm/tlbflush.h>
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#include <asm/traps.h>
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void (*pm_power_off)(void);
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EXPORT_SYMBOL(pm_power_off);
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static void watchdog_trigger_immediate(void)
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{
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sh_wdt_write_cnt(0xFF);
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sh_wdt_write_csr(0xC2);
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}
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static void native_machine_restart(char * __unused)
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{
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local_irq_disable();
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/* Destroy all of the TLBs in preparation for reset by MMU */
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__flush_tlb_global();
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/* Address error with SR.BL=1 first. */
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trigger_address_error();
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/* If that fails or is unsupported, go for the watchdog next. */
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watchdog_trigger_immediate();
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/*
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* Give up and sleep.
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*/
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while (1)
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cpu_sleep();
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}
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static void native_machine_shutdown(void)
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{
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smp_send_stop();
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}
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static void native_machine_power_off(void)
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{
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do_kernel_power_off();
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}
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static void native_machine_halt(void)
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{
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/* stop other cpus */
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machine_shutdown();
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/* stop this cpu */
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stop_this_cpu(NULL);
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}
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struct machine_ops machine_ops = {
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.power_off = native_machine_power_off,
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.shutdown = native_machine_shutdown,
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.restart = native_machine_restart,
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.halt = native_machine_halt,
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#ifdef CONFIG_KEXEC
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.crash_shutdown = native_machine_crash_shutdown,
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#endif
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};
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void machine_power_off(void)
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{
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machine_ops.power_off();
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}
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void machine_shutdown(void)
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{
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machine_ops.shutdown();
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}
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void machine_restart(char *cmd)
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{
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machine_ops.restart(cmd);
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}
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void machine_halt(void)
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{
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machine_ops.halt();
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}
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#ifdef CONFIG_KEXEC
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void machine_crash_shutdown(struct pt_regs *regs)
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{
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machine_ops.crash_shutdown(regs);
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}
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#endif
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