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ARM: gemini: convert to MULTI_IRQ_HANDLER 

In order to enable device tree boot on this machine we must first
convert it to runtime-manage its irq handler, so do this.

Cc: Janos Laube <janos.dev@gmail.com>
Cc: Paulius Zaleckas <paulius.zaleckas@gmail.com>
Cc: Hans Ulli Kroll <ulli.kroll@googlemail.com>
Cc: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Linus Walleij 2017-01-13 23:55:54 +01:00
parent c1ae3cfa0e
commit c12ddfe1ed
3 changed files with 16 additions and 33 deletions
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1
arch/arm/Kconfig
View File

@ -365,6 +365,7 @@ config ARCH_GEMINI
select CPU_FA526
select GENERIC_CLOCKEVENTS
select GPIOLIB
select MULTI_IRQ_HANDLER
help
Support for the Cortina Systems Gemini family SoCs

33
arch/arm/mach-gemini/include/mach/entry-macro.S
View File

@ -1,33 +0,0 @@
/*
* Low-level IRQ helper macros for Gemini platform.
*
* Copyright (C) 2001-2006 Storlink, Corp.
* Copyright (C) 2008-2009 Paulius Zaleckas <paulius.zaleckas@teltonika.lt>
*
* This file is licensed under the terms of the GNU General Public
* License version 2. This program is licensed "as is" without any
* warranty of any kind, whether express or implied.
*/
#include <mach/hardware.h>
#define IRQ_STATUS 0x14
.macro get_irqnr_preamble, base, tmp
.endm
.macro get_irqnr_and_base, irqnr, irqstat, base, tmp
ldr \irqstat, =IO_ADDRESS(GEMINI_INTERRUPT_BASE + IRQ_STATUS)
ldr \irqnr, [\irqstat]
cmp \irqnr, #0
beq 2313f
mov \tmp, \irqnr
mov \irqnr, #0
2312:
tst \tmp, #1
bne 2313f
add \irqnr, \irqnr, #1
mov \tmp, \tmp, lsr #1
cmp \irqnr, #31
bcc 2312b
2313:
.endm

15
arch/arm/mach-gemini/irq.c
View File

@ -17,6 +17,7 @@
#include <linux/sched.h>
#include <linux/cpu.h>
#include <asm/exception.h>
#include <asm/irq.h>
#include <asm/mach/irq.h>
#include <asm/system_misc.h>
@ -65,6 +66,18 @@ static struct irq_chip gemini_irq_chip = {
.irq_unmask = gemini_unmask_irq,
};
asmlinkage void __exception_irq_entry gemini_handle_irq(struct pt_regs *regs)
{
int irq;
unsigned status;
while ((status = __raw_readl(IRQ_STATUS(IO_ADDRESS(GEMINI_INTERRUPT_BASE))))) {
irq = ffs(status) - 1;
handle_domain_irq(NULL, irq, regs);
}
}
static struct resource irq_resource = {
.name = "irq_handler",
.start = GEMINI_INTERRUPT_BASE,
@ -102,4 +115,6 @@ void __init gemini_init_irq(void)
/* Set interrupt mode */
__raw_writel(mode, IRQ_TMODE(IO_ADDRESS(GEMINI_INTERRUPT_BASE)));
__raw_writel(level, IRQ_TLEVEL(IO_ADDRESS(GEMINI_INTERRUPT_BASE)));
set_handle_irq(gemini_handle_irq);
}