MIPS: Loongson64: Remove dead RTC code

RTC is now enabled by devicetree. So platform code is
no longer needed.

Signed-off-by: Jiaxun Yang <[e-mail]>
Signed-off-by: Thomas Bogendoerfer <[e-mail]>

arch/mips/include/asm/mach-loongson64/mc146818rtc.h

···
-/*
- * This file is subject to the terms and conditions of the GNU General Public
- * License.  See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * Copyright (C) 1998, 2001, 03, 07 by Ralf Baechle ([e-mail])
- *
- * RTC routines for PC style attached Dallas chip.
- */
-#ifndef __ASM_MACH_LOONGSON64_MC146818RTC_H
-#define __ASM_MACH_LOONGSON64_MC146818RTC_H
-
-#include <linux/io.h>
-
-#define RTC_PORT(x)	(0x70 + (x))
-#define RTC_IRQ		8
-
-static inline unsigned char CMOS_READ(unsigned long addr)
-{
-	outb_p(addr, RTC_PORT(0));
-	return inb_p(RTC_PORT(1));
-}
-
-static inline void CMOS_WRITE(unsigned char data, unsigned long addr)
-{
-	outb_p(addr, RTC_PORT(0));
-	outb_p(data, RTC_PORT(1));
-}
-
-#define RTC_ALWAYS_BCD	0
-
-#ifndef mc146818_decode_year
-#define mc146818_decode_year(year) ((year) < 70 ? (year) + 2000 : (year) + 1970)
-#endif
-
-#endif /* __ASM_MACH_LOONGSON64_MC146818RTC_H */

arch/mips/loongson64/Kconfig

···
 	  If unsure, say Yes.
 
 
-config LOONGSON_MC146818
-	bool
-	default n
-
 endif # MACH_LOONGSON64

arch/mips/loongson64/Makefile

···
 obj-$(CONFIG_NUMA)	+= numa.o
 obj-$(CONFIG_RS780_HPET) += hpet.o
 obj-$(CONFIG_PCI) += pci.o
-obj-$(CONFIG_LOONGSON_MC146818) += rtc.o
 obj-$(CONFIG_SUSPEND) += pm.o

arch/mips/loongson64/rtc.c

···
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- *  Lemote Fuloong platform support
- *
- *  Copyright(c) 2010 Arnaud Patard <[e-mail]>
- */
-
-#include <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/platform_device.h>
-#include <linux/mc146818rtc.h>
-
-static struct resource loongson_rtc_resources[] = {
-	{
-		.start	= RTC_PORT(0),
-		.end	= RTC_PORT(1),
-		.flags	= IORESOURCE_IO,
-	}, {
-		.start	= RTC_IRQ,
-		.end	= RTC_IRQ,
-		.flags	= IORESOURCE_IRQ,
-	}
-};
-
-static struct platform_device loongson_rtc_device = {
-	.name		= "rtc_cmos",
-	.id		= -1,
-	.resource	= loongson_rtc_resources,
-	.num_resources	= ARRAY_SIZE(loongson_rtc_resources),
-};
-
-
-static int __init loongson_rtc_platform_init(void)
-{
-	platform_device_register(&loongson_rtc_device);
-	return 0;
-}
-
-device_initcall(loongson_rtc_platform_init);

arch/mips/loongson64/time.c

···
  * Copyright (C) 2009 Lemote Inc.
  * Author: Wu Zhangjin, [e-mail]
  */
-#include <asm/mc146818-time.h>
+
 #include <asm/time.h>
 #include <asm/hpet.h>
 
···
 #ifdef CONFIG_RS780_HPET
 	setup_hpet_timer();
 #endif
-}
-
-void read_persistent_clock64(struct timespec64 *ts)
-{
-	ts->tv_sec = mc146818_get_cmos_time();
-	ts->tv_nsec = 0;
 }