From mboxrd@z Thu Jan 1 00:00:00 1970 From: nicolas.ferre@atmel.com (Nicolas Ferre) Date: Thu, 24 Nov 2011 22:56:27 +0100 Subject: [PATCH 1/3] ARM: at91/aic: add device tree support for AIC Message-ID: <167b5ccfc31d9637186c5201cd83cb62df81fc0f.1322171620.git.nicolas.ferre@atmel.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Ioremap registers from DT specification and adding of a simple irq domain for AIC interrupts. Signed-off-by: Nicolas Ferre Acked-by: Jean-Christophe PLAGNIOL-VILLARD --- arch/arm/Kconfig | 1 + arch/arm/mach-at91/irq.c | 41 ++++++++++++++++++++++++++++++++++++++++- 2 files changed, 41 insertions(+), 1 deletions(-) diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 44789ef..293c152 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -318,6 +318,7 @@ config ARCH_AT91 select ARCH_REQUIRE_GPIOLIB select HAVE_CLK select CLKDEV_LOOKUP + select IRQ_DOMAIN help This enables support for systems based on the Atmel AT91RM9200, AT91SAM9 and AT91CAP9 processors. diff --git a/arch/arm/mach-at91/irq.c b/arch/arm/mach-at91/irq.c index be6b639..80783b0 100644 --- a/arch/arm/mach-at91/irq.c +++ b/arch/arm/mach-at91/irq.c @@ -24,6 +24,8 @@ #include #include #include +#include +#include #include #include @@ -34,6 +36,7 @@ #include void __iomem *at91_aic_base; +static struct irq_domain at91_aic_domain; static void at91_aic_mask_irq(struct irq_data *d) { @@ -127,14 +130,44 @@ static struct irq_chip at91_aic_chip = { .irq_set_wake = at91_aic_set_wake, }; +#if defined(CONFIG_OF) +static struct of_device_id aic_ids[] = { + { .compatible = "atmel,at91rm9200-aic" }, + { /*sentinel*/ } +}; + +static int __init at91_aic_of_init(void) +{ + struct device_node *np; + + np = of_find_matching_node(NULL, aic_ids); + if (np == NULL) + return -ENODEV; + + at91_aic_base = of_iomap(np, 0); + at91_aic_domain.of_node = np; + /* Keep refcount of the node */ + + return 0; +} +#else +static int __init at91_aic_of_init(void) +{ + return -ENOSYS; +} +#endif + /* * Initialize the AIC interrupt controller. */ void __init at91_aic_init(unsigned int priority[NR_AIC_IRQS]) { unsigned int i; + int ret; - at91_aic_base = ioremap(AT91_AIC, 512); + ret = at91_aic_of_init(); + if (ret < 0) + at91_aic_base = ioremap(AT91_AIC, 512); if (!at91_aic_base) panic("Impossible to ioremap AT91_AIC\n"); @@ -169,4 +202,10 @@ void __init at91_aic_init(unsigned int priority[NR_AIC_IRQS]) /* Disable and clear all interrupts initially */ at91_aic_write(AT91_AIC_IDCR, 0xFFFFFFFF); at91_aic_write(AT91_AIC_ICCR, 0xFFFFFFFF); + + /* Add irq domain for AIC */ + at91_aic_domain.irq_base = at91_aic_domain.hwirq_base = 0; + at91_aic_domain.nr_irq = NR_AIC_IRQS; + at91_aic_domain.ops = &irq_domain_simple_ops; + irq_domain_add(&at91_aic_domain); } -- 1.7.5.4