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m68k: Switch to new sys-off handler API

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Kernel now supports chained power-off handlers. Use
register_power_off_handler() that registers power-off handlers and
do_kernel_power_off() that invokes chained power-off handlers. Legacy
pm_power_off() will be removed once all drivers will be converted to
the new sys-off API.

Normally arch code should adopt only the do_kernel_power_off() at first,
but m68k is a special case because it uses pm_power_off() "inside out",
i.e. pm_power_off() invokes machine_power_off() [in fact it does nothing],
while it's machine_power_off() that should invoke the pm_power_off(), and
thus, we can't convert platforms to the new API separately. There are only
two platforms changed here, so it's not a big deal.

Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
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>
This commit is contained in:
Dmitry Osipenko 2022-05-10 02:32:24 +03:00 committed by Rafael J. Wysocki
parent c33fd0b17e
commit f0f7e5265b
6 changed files with 7 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
arch/m68k/emu/natfeat.c
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@ -15,6 +15,7 @@
#include <linux/string.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/reboot.h>
#include <linux/io.h>
#include <asm/machdep.h>
#include <asm/natfeat.h>
@ -90,5 +91,5 @@ void __init nf_init(void)
pr_info("NatFeats found (%s, %lu.%lu)\n", buf, version >> 16,
version & 0xffff);
mach_power_off = nf_poweroff;
register_platform_power_off(nf_poweroff);
}

1
arch/m68k/include/asm/machdep.h
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@ -24,7 +24,6 @@ extern int (*mach_get_rtc_pll)(struct rtc_pll_info *);
extern int (*mach_set_rtc_pll)(struct rtc_pll_info *);
extern void (*mach_reset)( void );
extern void (*mach_halt)( void );
extern void (*mach_power_off)( void );
extern unsigned long (*mach_hd_init) (unsigned long, unsigned long);
extern void (*mach_hd_setup)(char *, int *);
extern void (*mach_heartbeat) (int);

5
arch/m68k/kernel/process.c
View File

@ -67,12 +67,11 @@ void machine_halt(void)
void machine_power_off(void)
{
if (mach_power_off)
mach_power_off();
do_kernel_power_off();
for (;;);
}
void (*pm_power_off)(void) = machine_power_off;
void (*pm_power_off)(void);
EXPORT_SYMBOL(pm_power_off);
void show_regs(struct pt_regs * regs)

1
arch/m68k/kernel/setup_mm.c
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@ -98,7 +98,6 @@ EXPORT_SYMBOL(mach_get_rtc_pll);
EXPORT_SYMBOL(mach_set_rtc_pll);
void (*mach_reset)( void );
void (*mach_halt)( void );
void (*mach_power_off)( void );
#ifdef CONFIG_HEARTBEAT
void (*mach_heartbeat) (int);
EXPORT_SYMBOL(mach_heartbeat);

1
arch/m68k/kernel/setup_no.c
View File

@ -55,7 +55,6 @@ int (*mach_hwclk) (int, struct rtc_time*);
/* machine dependent reboot functions */
void (*mach_reset)(void);
void (*mach_halt)(void);
void (*mach_power_off)(void);
#ifdef CONFIG_M68000
#if defined(CONFIG_M68328)

4
arch/m68k/mac/config.c
View File

@ -12,6 +12,7 @@
#include <linux/errno.h>
#include <linux/module.h>
#include <linux/reboot.h>
#include <linux/types.h>
#include <linux/mm.h>
#include <linux/tty.h>
@ -140,7 +141,6 @@ void __init config_mac(void)
mach_hwclk = mac_hwclk;
mach_reset = mac_reset;
mach_halt = mac_poweroff;
mach_power_off = mac_poweroff;
#if IS_ENABLED(CONFIG_INPUT_M68K_BEEP)
mach_beep = mac_mksound;
#endif
@ -160,6 +160,8 @@ void __init config_mac(void)
if (macintosh_config->ident == MAC_MODEL_IICI)
mach_l2_flush = via_l2_flush;
register_platform_power_off(mac_poweroff);
}