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Commit 8e56e6d5 authored by Magnus Damm's avatar Magnus Damm Committed by Simon Horman
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ARM: shmobile: INTC External IRQ pin driver on r8a7779 



Update the r8a7779 IRQ code to make use of the
INTC External IRQ pin driver for external
interrupt pins IRQ0 -> IRQ3.

The r8a7779 SoC can like older SH SoCs configure
to use the IRQ0 -> IRQ3 signals as individual
interrupts or a combined IRL mode.

Without this patch the r8a7779 SoC code does
not fully support external IRQ pins in individual
IRQ mode. The r8a7779 PFC code does not yet have
gpio_to_irq() support so no need to update such
code.

At this point the DT reference implementations
are not covered. In the future such code shall
tie in the INTC External IRQ pin driver via
DT, so this kind of verbose code is not needed
for the long term DT case.

Signed-off-by: default avatarMagnus Damm <damm@opensource.se>
Tested-by: default avatarGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: default avatarSimon Horman <horms+renesas@verge.net.au>
parent 341eb546

arch/arm/mach-shmobile/Kconfig

+1 −0
Original line number Original line Diff line number Diff line
@@ -32,6 +32,7 @@ config ARCH_R8A7779 
	select SH_CLK_CPG

	select SH_CLK_CPG

	select USB_ARCH_HAS_EHCI

	select USB_ARCH_HAS_EHCI

	select USB_ARCH_HAS_OHCI

	select USB_ARCH_HAS_OHCI

	select RENESAS_INTC_IRQPIN





config ARCH_EMEV2

config ARCH_EMEV2

	bool "Emma Mobile EV2"

	bool "Emma Mobile EV2"

arch/arm/mach-shmobile/include/mach/common.h

+1 −0
Original line number Original line Diff line number Diff line
@@ -61,6 +61,7 @@ extern void r8a7740_pm_init(void); 




extern void r8a7779_init_delay(void);

extern void r8a7779_init_delay(void);

extern void r8a7779_init_irq(void);

extern void r8a7779_init_irq(void);

extern void r8a7779_init_irq_extpin(int irlm);

extern void r8a7779_init_irq_dt(void);

extern void r8a7779_init_irq_dt(void);

extern void r8a7779_map_io(void);

extern void r8a7779_map_io(void);

extern void r8a7779_earlytimer_init(void);

extern void r8a7779_earlytimer_init(void);

arch/arm/mach-shmobile/intc-r8a7779.c

+52 −1
Original line number Original line Diff line number Diff line
@@ -19,13 +19,16 @@ 
 */

 */

#include <linux/kernel.h>

#include <linux/kernel.h>

#include <linux/init.h>

#include <linux/init.h>

#include <linux/platform_device.h>

#include <linux/interrupt.h>

#include <linux/interrupt.h>

#include <linux/irq.h>

#include <linux/irq.h>

#include <linux/io.h>

#include <linux/io.h>

#include <linux/irqchip/arm-gic.h>

#include <linux/irqchip/arm-gic.h>

#include <mach/common.h>

#include <linux/platform_data/irq-renesas-intc-irqpin.h>

#include <linux/irqchip.h>

#include <linux/irqchip.h>

#include <mach/common.h>

#include <mach/intc.h>

#include <mach/intc.h>

#include <mach/irqs.h>

#include <mach/r8a7779.h>

#include <mach/r8a7779.h>

#include <asm/mach-types.h>

#include <asm/mach-types.h>

#include <asm/mach/arch.h>

#include <asm/mach/arch.h>
@@ -39,6 +42,54 @@ 
#define INT2NTSR0 IOMEM(0xfe700060)

#define INT2NTSR0 IOMEM(0xfe700060)

#define INT2NTSR1 IOMEM(0xfe700064)

#define INT2NTSR1 IOMEM(0xfe700064)





struct renesas_intc_irqpin_config irqpin0_platform_data = {

	.irq_base = irq_pin(0), /* IRQ0 -> IRQ3 */

	.sense_bitfield_width = 2,

};



static struct resource irqpin0_resources[] = {

	DEFINE_RES_MEM(0xfe78001c, 4), /* ICR1 */

	DEFINE_RES_MEM(0xfe780010, 4), /* INTPRI */

	DEFINE_RES_MEM(0xfe780024, 4), /* INTREQ */

	DEFINE_RES_MEM(0xfe780044, 4), /* INTMSK0 */

	DEFINE_RES_MEM(0xfe780064, 4), /* INTMSKCLR0 */

	DEFINE_RES_IRQ(gic_spi(27)), /* IRQ0 */

	DEFINE_RES_IRQ(gic_spi(28)), /* IRQ1 */

	DEFINE_RES_IRQ(gic_spi(29)), /* IRQ2 */

	DEFINE_RES_IRQ(gic_spi(30)), /* IRQ3 */

};



static struct platform_device irqpin0_device = {

	.name		= "renesas_intc_irqpin",

	.id		= 0,

	.resource	= irqpin0_resources,

	.num_resources	= ARRAY_SIZE(irqpin0_resources),

	.dev		= {

		.platform_data	= &irqpin0_platform_data,

	},

};



void __init r8a7779_init_irq_extpin(int irlm)

{

	void __iomem *icr0 = ioremap_nocache(0xfe780000, PAGE_SIZE);

	unsigned long tmp;



	if (icr0) {

		tmp = ioread32(icr0);

		if (irlm)

			tmp |= 1 << 23; /* IRQ0 -> IRQ3 as individual pins */

		else

			tmp &= ~(1 << 23); /* IRL mode - not supported */

		tmp |= (1 << 21); /* LVLMODE = 1 */

		iowrite32(tmp, icr0);

		iounmap(icr0);



		if (irlm)

			platform_device_register(&irqpin0_device);

	} else

		pr_warn("r8a7779: unable to setup external irq pin mode\n");

}



static int r8a7779_set_wake(struct irq_data *data, unsigned int on)

static int r8a7779_set_wake(struct irq_data *data, unsigned int on)

{

{

	return 0; /* always allow wakeup */

	return 0; /* always allow wakeup */