modify sin led gpio

hc

2024-05-13 9d77db3c730780c8ef5ccd4b66403ff5675cfe4e

 kernel/arch/parisc/kernel/process.c
..
..
@@ -123,13 +123,18 @@
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 	/* It seems we have no way to power the system off via
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 	 * software. The user has to press the button himself. */
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-	printk(KERN_EMERG "System shut down completed.\n"
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-	       "Please power this system off now.");
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+	printk("Power off or press RETURN to reboot.\n");
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 	/* prevent soft lockup/stalled CPU messages for endless loop. */
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 	rcu_sysrq_start();
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 	lockup_detector_soft_poweroff();
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-	for (;;);
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+	while (1) {
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+		/* reboot if user presses RETURN key */
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+		if (pdc_iodc_getc() == 13) {
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+			printk("Rebooting...\n");
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+			machine_restart(NULL);
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+		}
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+	}
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 }
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 void (*pm_power_off)(void);