From 0ea33321ffaf20a54e87a9fe087628a1f72a36bc Mon Sep 17 00:00:00 2001
From: Jiaxun Yang <jiaxun.yang@flygoat.com>
Date: Thu, 26 Mar 2020 14:17:00 +0800
Subject: [PATCH] MIPS: Kill RM7K & RM9K IRQ Code

RM7000 IRQ driver never got really used by any of the platform,
and rm9k_cpu_irq_init only exist in a header.

Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
---
 arch/mips/Kconfig                        |  3 --
 arch/mips/include/asm/irq_cpu.h          |  2 --
 arch/mips/include/asm/mach-generic/irq.h |  6 ----
 arch/mips/kernel/Makefile                |  1 -
 arch/mips/kernel/irq-rm7000.c            | 45 ------------------------
 5 files changed, 57 deletions(-)
 delete mode 100644 arch/mips/kernel/irq-rm7000.c

diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 102236cb5e06..d68df1febd25 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -1256,9 +1256,6 @@ config SYS_SUPPORTS_HUGETLBFS
 config MIPS_HUGE_TLB_SUPPORT
 	def_bool HUGETLB_PAGE || TRANSPARENT_HUGEPAGE
 
-config IRQ_CPU_RM7K
-	bool
-
 config IRQ_MSP_SLP
 	bool
 
diff --git a/arch/mips/include/asm/irq_cpu.h b/arch/mips/include/asm/irq_cpu.h
index 8d321180b5c2..83d7331ab215 100644
--- a/arch/mips/include/asm/irq_cpu.h
+++ b/arch/mips/include/asm/irq_cpu.h
@@ -10,8 +10,6 @@
 #define _ASM_IRQ_CPU_H
 
 extern void mips_cpu_irq_init(void);
-extern void rm7k_cpu_irq_init(void);
-extern void rm9k_cpu_irq_init(void);
 
 #ifdef CONFIG_IRQ_DOMAIN
 struct device_node;
diff --git a/arch/mips/include/asm/mach-generic/irq.h b/arch/mips/include/asm/mach-generic/irq.h
index 079889ced4f3..4249af4bef84 100644
--- a/arch/mips/include/asm/mach-generic/irq.h
+++ b/arch/mips/include/asm/mach-generic/irq.h
@@ -28,12 +28,6 @@
 #endif /* CONFIG_I8259 */
 #endif
 
-#ifdef CONFIG_IRQ_CPU_RM7K
-#ifndef RM7K_CPU_IRQ_BASE
-#define RM7K_CPU_IRQ_BASE (MIPS_CPU_IRQ_BASE+8)
-#endif
-#endif
-
 #endif /* CONFIG_IRQ_MIPS_CPU */
 
 #endif /* __ASM_MACH_GENERIC_IRQ_H */
diff --git a/arch/mips/kernel/Makefile b/arch/mips/kernel/Makefile
index 2a05b923f579..2303a5868c14 100644
--- a/arch/mips/kernel/Makefile
+++ b/arch/mips/kernel/Makefile
@@ -71,7 +71,6 @@ obj-$(CONFIG_MIPS_VPE_APSP_API) += rtlx.o
 obj-$(CONFIG_MIPS_VPE_APSP_API_CMP) += rtlx-cmp.o
 obj-$(CONFIG_MIPS_VPE_APSP_API_MT) += rtlx-mt.o
 
-obj-$(CONFIG_IRQ_CPU_RM7K)	+= irq-rm7000.o
 obj-$(CONFIG_MIPS_MSC)		+= irq-msc01.o
 obj-$(CONFIG_IRQ_TXX9)		+= irq_txx9.o
 obj-$(CONFIG_IRQ_GT641XX)	+= irq-gt641xx.o
diff --git a/arch/mips/kernel/irq-rm7000.c b/arch/mips/kernel/irq-rm7000.c
deleted file mode 100644
index e1a497f639d7..000000000000
--- a/arch/mips/kernel/irq-rm7000.c
+++ /dev/null
@@ -1,45 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * Copyright (C) 2003 Ralf Baechle
- *
- * Handler for RM7000 extended interrupts.  These are a non-standard
- * feature so we handle them separately from standard interrupts.
- */
-#include <linux/init.h>
-#include <linux/interrupt.h>
-#include <linux/irq.h>
-#include <linux/kernel.h>
-
-#include <asm/irq_cpu.h>
-#include <asm/mipsregs.h>
-
-static inline void unmask_rm7k_irq(struct irq_data *d)
-{
-	set_c0_intcontrol(0x100 << (d->irq - RM7K_CPU_IRQ_BASE));
-}
-
-static inline void mask_rm7k_irq(struct irq_data *d)
-{
-	clear_c0_intcontrol(0x100 << (d->irq - RM7K_CPU_IRQ_BASE));
-}
-
-static struct irq_chip rm7k_irq_controller = {
-	.name = "RM7000",
-	.irq_ack = mask_rm7k_irq,
-	.irq_mask = mask_rm7k_irq,
-	.irq_mask_ack = mask_rm7k_irq,
-	.irq_unmask = unmask_rm7k_irq,
-	.irq_eoi = unmask_rm7k_irq
-};
-
-void __init rm7k_cpu_irq_init(void)
-{
-	int base = RM7K_CPU_IRQ_BASE;
-	int i;
-
-	clear_c0_intcontrol(0x00000f00);		/* Mask all */
-
-	for (i = base; i < base + 4; i++)
-		irq_set_chip_and_handler(i, &rm7k_irq_controller,
-					 handle_percpu_irq);
-}