168 lines
4.2 KiB
Diff
168 lines
4.2 KiB
Diff
From 6be3809614db2d52724eb4b5193c27d2466142be Mon Sep 17 00:00:00 2001
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From: notro <notro@tronnes.org>
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Date: Wed, 9 Jul 2014 14:47:48 +0200
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Subject: [PATCH 050/114] BCM2708: armctrl: Add IRQ Device Tree support
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Add Device Tree IRQ support for BCM2708.
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Usage is the same as for irq-bcm2835.
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See binding document: brcm,bcm2835-armctrl-ic.txt
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A bank 3 is added to handle GPIO interrupts. This is done because
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armctrl also handles GPIO interrupts.
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Signed-off-by: Noralf Tronnes <notro@tronnes.org>
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BCM2708: armctrl: remove irq bank 3
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irq bank 3 was needed by the pinctrl-bcm2708 and bcm2708_gpio
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combination. It is no longer required.
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Signed-off-by: Noralf Tronnes <notro@tronnes.org>
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---
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arch/arm/boot/dts/bcm2708.dtsi | 9 ++++
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arch/arm/mach-bcm2708/armctrl.c | 96 +++++++++++++++++++++++++++++++++++++++++
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2 files changed, 105 insertions(+)
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--- a/arch/arm/boot/dts/bcm2708.dtsi
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+++ b/arch/arm/boot/dts/bcm2708.dtsi
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@@ -4,6 +4,8 @@
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compatible = "brcm,bcm2708";
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model = "BCM2708";
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+ interrupt-parent = <&intc>;
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+
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chosen {
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/*
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bootargs must be 1024 characters long because the
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@@ -17,6 +19,13 @@
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#address-cells = <1>;
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#size-cells = <1>;
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ranges = <0x7e000000 0x20000000 0x02000000>;
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+
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+ intc: interrupt-controller {
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+ compatible = "brcm,bcm2708-armctrl-ic";
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+ reg = <0x7e00b200 0x200>;
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+ interrupt-controller;
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+ #interrupt-cells = <2>;
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+ };
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};
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clocks {
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--- a/arch/arm/mach-bcm2708/armctrl.c
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+++ b/arch/arm/mach-bcm2708/armctrl.c
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@@ -23,6 +23,8 @@
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#include <linux/version.h>
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#include <linux/syscore_ops.h>
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#include <linux/interrupt.h>
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+#include <linux/irqdomain.h>
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+#include <linux/of.h>
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#include <asm/mach/irq.h>
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#include <mach/hardware.h>
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@@ -79,6 +81,99 @@ static void armctrl_unmask_irq(struct ir
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}
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}
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+#ifdef CONFIG_OF
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+
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+#define NR_IRQS_BANK0 21
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+#define NR_BANKS 3
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+#define IRQS_PER_BANK 32
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+
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+/* from drivers/irqchip/irq-bcm2835.c */
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+static int armctrl_xlate(struct irq_domain *d, struct device_node *ctrlr,
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+ const u32 *intspec, unsigned int intsize,
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+ unsigned long *out_hwirq, unsigned int *out_type)
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+{
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+ if (WARN_ON(intsize != 2))
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+ return -EINVAL;
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+
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+ if (WARN_ON(intspec[0] >= NR_BANKS))
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+ return -EINVAL;
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+
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+ if (WARN_ON(intspec[1] >= IRQS_PER_BANK))
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+ return -EINVAL;
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+
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+ if (WARN_ON(intspec[0] == 0 && intspec[1] >= NR_IRQS_BANK0))
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+ return -EINVAL;
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+
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+ if (intspec[0] == 0)
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+ *out_hwirq = ARM_IRQ0_BASE + intspec[1];
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+ else if (intspec[0] == 1)
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+ *out_hwirq = ARM_IRQ1_BASE + intspec[1];
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+ else
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+ *out_hwirq = ARM_IRQ2_BASE + intspec[1];
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+
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+ /* reverse remap_irqs[] */
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+ switch (*out_hwirq) {
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+ case INTERRUPT_VC_JPEG:
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+ *out_hwirq = INTERRUPT_JPEG;
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+ break;
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+ case INTERRUPT_VC_USB:
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+ *out_hwirq = INTERRUPT_USB;
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+ break;
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+ case INTERRUPT_VC_3D:
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+ *out_hwirq = INTERRUPT_3D;
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+ break;
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+ case INTERRUPT_VC_DMA2:
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+ *out_hwirq = INTERRUPT_DMA2;
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+ break;
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+ case INTERRUPT_VC_DMA3:
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+ *out_hwirq = INTERRUPT_DMA3;
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+ break;
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+ case INTERRUPT_VC_I2C:
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+ *out_hwirq = INTERRUPT_I2C;
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+ break;
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+ case INTERRUPT_VC_SPI:
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+ *out_hwirq = INTERRUPT_SPI;
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+ break;
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+ case INTERRUPT_VC_I2SPCM:
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+ *out_hwirq = INTERRUPT_I2SPCM;
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+ break;
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+ case INTERRUPT_VC_SDIO:
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+ *out_hwirq = INTERRUPT_SDIO;
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+ break;
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+ case INTERRUPT_VC_UART:
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+ *out_hwirq = INTERRUPT_UART;
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+ break;
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+ case INTERRUPT_VC_ARASANSDIO:
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+ *out_hwirq = INTERRUPT_ARASANSDIO;
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+ break;
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+ }
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+
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+ *out_type = IRQ_TYPE_NONE;
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+ return 0;
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+}
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+
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+static struct irq_domain_ops armctrl_ops = {
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+ .xlate = armctrl_xlate
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+};
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+
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+void __init armctrl_dt_init(void)
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+{
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+ struct device_node *np;
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+ struct irq_domain *domain;
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+
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+ np = of_find_compatible_node(NULL, NULL, "brcm,bcm2708-armctrl-ic");
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+ if (!np)
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+ return;
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+
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+ domain = irq_domain_add_legacy(np, BCM2708_ALLOC_IRQS,
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+ IRQ_ARMCTRL_START, 0,
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+ &armctrl_ops, NULL);
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+ WARN_ON(!domain);
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+}
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+#else
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+void __init armctrl_dt_init(void) { }
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+#endif /* CONFIG_OF */
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+
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#if defined(CONFIG_PM)
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/* for kernels 3.xx use the new syscore_ops apis but for older kernels use the sys dev class */
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@@ -215,5 +310,6 @@ int __init armctrl_init(void __iomem * b
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armctrl_pm_register(base, irq_start, resume_sources);
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init_FIQ(FIQ_START);
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+ armctrl_dt_init();
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return 0;
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}
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