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Message-Id: <20230609022240.1694244-5-jcmvbkbc@gmail.com>
Date: Thu, 8 Jun 2023 19:22:39 -0700
From: Max Filippov <jcmvbkbc@...il.com>
To: linux-kernel@...r.kernel.org
Cc: Chris Zankel <chris@...kel.net>, Max Filippov <jcmvbkbc@...il.com>
Subject: [PATCH 4/5] xtensa: drop platform_halt and platform_power_off
Instead of using xtensa-specific platform_halt and platform_power_off
callbacks use do_kernel_power_off in the machine_halt and
machine_power_off and reimplement existing platform_halt and
platform_power_off users with register_sys_off_handler.
Drop platform_halt and platform_power_off declarations and default
implementations.
Signed-off-by: Max Filippov <jcmvbkbc@...il.com>
---
arch/xtensa/include/asm/platform.h | 10 ----------
arch/xtensa/kernel/platform.c | 2 --
arch/xtensa/kernel/setup.c | 14 ++++++++++----
arch/xtensa/platforms/iss/setup.c | 12 +++++-------
arch/xtensa/platforms/xt2000/setup.c | 13 +++++--------
arch/xtensa/platforms/xtfpga/setup.c | 14 +++++---------
6 files changed, 25 insertions(+), 40 deletions(-)
diff --git a/arch/xtensa/include/asm/platform.h b/arch/xtensa/include/asm/platform.h
index 5b3c1f96f7b5..94f13fabf7cd 100644
--- a/arch/xtensa/include/asm/platform.h
+++ b/arch/xtensa/include/asm/platform.h
@@ -27,16 +27,6 @@ extern void platform_init(bp_tag_t*);
*/
extern void platform_setup (char **);
-/*
- * platform_halt is called to stop the system and halt.
- */
-extern void platform_halt (void);
-
-/*
- * platform_power_off is called to stop the system and power it off.
- */
-extern void platform_power_off (void);
-
/*
* platform_idle is called from the idle function.
*/
diff --git a/arch/xtensa/kernel/platform.c b/arch/xtensa/kernel/platform.c
index 526ab744271f..29fa5d659274 100644
--- a/arch/xtensa/kernel/platform.c
+++ b/arch/xtensa/kernel/platform.c
@@ -28,8 +28,6 @@
_F(void, init, (bp_tag_t *first), { });
_F(void, setup, (char** cmd), { });
-_F(void, halt, (void), { while(1); });
-_F(void, power_off, (void), { while(1); });
_F(void, idle, (void), { __asm__ __volatile__ ("waiti 0" ::: "memory"); });
#ifdef CONFIG_XTENSA_CALIBRATE_CCOUNT
diff --git a/arch/xtensa/kernel/setup.c b/arch/xtensa/kernel/setup.c
index 8f72039335c2..5680391d7e35 100644
--- a/arch/xtensa/kernel/setup.c
+++ b/arch/xtensa/kernel/setup.c
@@ -533,14 +533,20 @@ void machine_restart(char * cmd)
void machine_halt(void)
{
- platform_halt();
- while (1);
+ local_irq_disable();
+ smp_send_stop();
+ do_kernel_power_off();
+ while (1)
+ cpu_relax();
}
void machine_power_off(void)
{
- platform_power_off();
- while (1);
+ local_irq_disable();
+ smp_send_stop();
+ do_kernel_power_off();
+ while (1)
+ cpu_relax();
}
#ifdef CONFIG_PROC_FS
diff --git a/arch/xtensa/platforms/iss/setup.c b/arch/xtensa/platforms/iss/setup.c
index a7009f223ef2..0f1fe132691e 100644
--- a/arch/xtensa/platforms/iss/setup.c
+++ b/arch/xtensa/platforms/iss/setup.c
@@ -25,16 +25,11 @@
#include <platform/simcall.h>
-void platform_halt(void)
-{
- pr_info(" ** Called platform_halt() **\n");
- simc_exit(0);
-}
-
-void platform_power_off(void)
+static int iss_power_off(struct sys_off_data *unused)
{
pr_info(" ** Called platform_power_off() **\n");
simc_exit(0);
+ return NOTIFY_DONE;
}
static int iss_restart(struct notifier_block *this,
@@ -90,4 +85,7 @@ void __init platform_setup(char **p_cmdline)
atomic_notifier_chain_register(&panic_notifier_list, &iss_panic_block);
register_restart_handler(&iss_restart_block);
+ register_sys_off_handler(SYS_OFF_MODE_POWER_OFF,
+ SYS_OFF_PRIO_PLATFORM,
+ iss_power_off, NULL);
}
diff --git a/arch/xtensa/platforms/xt2000/setup.c b/arch/xtensa/platforms/xt2000/setup.c
index 71b57ab50599..258e01a51fd8 100644
--- a/arch/xtensa/platforms/xt2000/setup.c
+++ b/arch/xtensa/platforms/xt2000/setup.c
@@ -42,18 +42,12 @@ static void led_print (int f, char *s)
break;
}
-void platform_halt(void)
-{
- led_print (0, " HALT ");
- local_irq_disable();
- while (1);
-}
-
-void platform_power_off(void)
+static int xt2000_power_off(struct sys_off_data *unused)
{
led_print (0, "POWEROFF");
local_irq_disable();
while (1);
+ return NOTIFY_DONE;
}
static int xt2000_restart(struct notifier_block *this,
@@ -147,6 +141,9 @@ static int __init xt2000_setup_devinit(void)
platform_device_register(&xt2000_sonic_device);
mod_timer(&heartbeat_timer, jiffies + HZ / 2);
register_restart_handler(&xt2000_restart_block);
+ register_sys_off_handler(SYS_OFF_MODE_POWER_OFF,
+ SYS_OFF_PRIO_DEFAULT,
+ xt2000_power_off, NULL);
return 0;
}
diff --git a/arch/xtensa/platforms/xtfpga/setup.c b/arch/xtensa/platforms/xtfpga/setup.c
index 1690232c003e..a2432f081710 100644
--- a/arch/xtensa/platforms/xtfpga/setup.c
+++ b/arch/xtensa/platforms/xtfpga/setup.c
@@ -33,20 +33,13 @@
#include <platform/lcd.h>
#include <platform/hardware.h>
-void platform_halt(void)
-{
- lcd_disp_at_pos(" HALT ", 0);
- local_irq_disable();
- while (1)
- cpu_relax();
-}
-
-void platform_power_off(void)
+static int xtfpga_power_off(struct sys_off_data *unused)
{
lcd_disp_at_pos("POWEROFF", 0);
local_irq_disable();
while (1)
cpu_relax();
+ return NOTIFY_DONE;
}
static int xtfpga_restart(struct notifier_block *this,
@@ -79,6 +72,9 @@ void __init platform_calibrate_ccount(void)
static void __init xtfpga_register_handlers(void)
{
register_restart_handler(&xtfpga_restart_block);
+ register_sys_off_handler(SYS_OFF_MODE_POWER_OFF,
+ SYS_OFF_PRIO_DEFAULT,
+ xtfpga_power_off, NULL);
}
#ifdef CONFIG_USE_OF
--
2.30.2
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