modify sin led gpio

hc

2024-05-13 9d77db3c730780c8ef5ccd4b66403ff5675cfe4e

 kernel/arch/powerpc/boot/util.S
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@@ -1,3 +1,4 @@
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+/* SPDX-License-Identifier: GPL-2.0-or-later */
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 /*
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  * Copied from <file:arch/powerpc/kernel/misc_32.S>
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  *
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@@ -10,12 +11,6 @@
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  * kexec bits:
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  * Copyright (C) 2002-2003 Eric Biederman  <ebiederm@xmission.com>
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  * GameCube/ppc32 port Copyright (C) 2004 Albert Herranz
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- *
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- * This program is free software; you can redistribute it and/or
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- * modify it under the terms of the GNU General Public License
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- * as published by the Free Software Foundation; either version
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- * 2 of the License, or (at your option) any later version.
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- *
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  */
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 #include "ppc_asm.h"
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@@ -23,7 +18,7 @@
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 	.text
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-/* udelay (on non-601 processors) needs to know the period of the
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+/* udelay needs to know the period of the
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  * timebase in nanoseconds.  This used to be hardcoded to be 60ns
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  * (period of 66MHz/4).  Now a variable is used that is initialized to
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  * 60 for backward compatibility, but it can be overridden as necessary
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@@ -42,19 +37,6 @@
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  */
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 	.globl	udelay
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 udelay:
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-	mfspr	r4,SPRN_PVR
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-	srwi	r4,r4,16
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-	cmpwi	0,r4,1		/* 601 ? */
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-	bne	.Ludelay_not_601
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-00:	li	r0,86	/* Instructions / microsecond? */
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-	mtctr	r0
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-10:	addi	r0,r0,0 /* NOP */
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-	bdnz	10b
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-	subic.	r3,r3,1
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-	bne	00b
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-	blr
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-
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-.Ludelay_not_601:
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 	mulli	r4,r3,1000	/* nanoseconds */
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 	/*  Change r4 to be the number of ticks using:
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 	 *	(nanoseconds + (timebase_period_ns - 1 )) / timebase_period_ns