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linux/Documentation/devicetree/bindings/interrupt-controller/brcm,bcm2835-armctrl-ic.txt

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ARM: bcm2835: add interrupt controller driver The BCM2835 contains a custom interrupt controller, which supports 72 interrupt sources using a 2-level register scheme. The interrupt controller, or the HW block containing it, is referred to occasionally as "armctrl" in the SoC documentation, hence the symbol naming in the code. This patch was extracted from git://github.com/lp0/linux.git branch rpi-split as of 2012/09/08, and modified as follows: * s/bcm2708/bcm2835/. * Modified device tree vendor prefix. * Moved implementation to drivers/irchip/. * Added devicetree documentation, and hence removed list of IRQs from bcm2835.dtsi. * Changed shift in MAKE_HWIRQ() and HWIRQ_BANK() from 8 to 5 to reduce the size of the hwirq space, and pass the total size of the hwirq space to irq_domain_add_linear(), rather than just the number of valid hwirqs; the two are different due to the hwirq space being sparse. * Added the interrupt controller DT node to the top-level of the DT, rather than nesting it inside a /axi node. Hence, changed the reg value since /axi had a ranges property. This seems simpler to me, but I'm not sure if everyone will like this change or not. * Don't set struct irq_domain_ops.map = irq_domain_simple_map, hence removing the need to patch include/linux/irqdomain.h or kernel/irq/irqdomain.c. * Simplified armctrl_of_init() using of_iomap(). * Removed unused IS_VALID_BANK()/IS_VALID_IRQ() macros. * Renamed armctrl_handle_irq() to prevent possible symbol clashes. * Made armctrl_of_init() static. * Removed comment "Each bank is registered as a separate interrupt controller" since this is no longer true. * Removed FSF address from license header. * Added my name to copyright header. Signed-off-by: Chris Boot <bootc@bootc.net> Signed-off-by: Simon Arlott <simon@fire.lp0.eu> Signed-off-by: Dom Cobley <popcornmix@gmail.com> Signed-off-by: Dom Cobley <dc4@broadcom.com> Signed-off-by: Stephen Warren <swarren@wwwdotorg.org> Acked-by: Arnd Bergmann <arnd@arndb.de>
2012-09-13 01:57:26 +00:00
BCM2835 Top-Level ("ARMCTRL") Interrupt Controller
The BCM2835 contains a custom top-level interrupt controller, which supports
72 interrupt sources using a 2-level register scheme. The interrupt
controller, or the HW block containing it, is referred to occasionally
as "armctrl" in the SoC documentation, hence naming of this binding.
irqchip/bcm2835: Add support for being used as a second level controller The BCM2836 (Raspberry Pi 2) uses two levels of interrupt handling with the CPU-local interrupts being the root, so we need to register ours as chained off of the CPU's local interrupt. Signed-off-by: Eric Anholt <eric@anholt.net> Acked-by: Stephen Warren <swarren@wwwdotorg.org> Cc: linux-rpi-kernel@lists.infradead.org Cc: Lee Jones <lee@kernel.org> Cc: Jason Cooper <jason@lakedaemon.net> Cc: linux-arm-kernel@lists.infradead.org Link: http://lkml.kernel.org/r/1438902033-31477-3-git-send-email-eric@anholt.net Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2015-08-06 23:00:31 +00:00
The BCM2836 contains the same interrupt controller with the same
interrupts, but the per-CPU interrupt controller is the root, and an
interrupt there indicates that the ARMCTRL has an interrupt to handle.
ARM: bcm2835: add interrupt controller driver The BCM2835 contains a custom interrupt controller, which supports 72 interrupt sources using a 2-level register scheme. The interrupt controller, or the HW block containing it, is referred to occasionally as "armctrl" in the SoC documentation, hence the symbol naming in the code. This patch was extracted from git://github.com/lp0/linux.git branch rpi-split as of 2012/09/08, and modified as follows: * s/bcm2708/bcm2835/. * Modified device tree vendor prefix. * Moved implementation to drivers/irchip/. * Added devicetree documentation, and hence removed list of IRQs from bcm2835.dtsi. * Changed shift in MAKE_HWIRQ() and HWIRQ_BANK() from 8 to 5 to reduce the size of the hwirq space, and pass the total size of the hwirq space to irq_domain_add_linear(), rather than just the number of valid hwirqs; the two are different due to the hwirq space being sparse. * Added the interrupt controller DT node to the top-level of the DT, rather than nesting it inside a /axi node. Hence, changed the reg value since /axi had a ranges property. This seems simpler to me, but I'm not sure if everyone will like this change or not. * Don't set struct irq_domain_ops.map = irq_domain_simple_map, hence removing the need to patch include/linux/irqdomain.h or kernel/irq/irqdomain.c. * Simplified armctrl_of_init() using of_iomap(). * Removed unused IS_VALID_BANK()/IS_VALID_IRQ() macros. * Renamed armctrl_handle_irq() to prevent possible symbol clashes. * Made armctrl_of_init() static. * Removed comment "Each bank is registered as a separate interrupt controller" since this is no longer true. * Removed FSF address from license header. * Added my name to copyright header. Signed-off-by: Chris Boot <bootc@bootc.net> Signed-off-by: Simon Arlott <simon@fire.lp0.eu> Signed-off-by: Dom Cobley <popcornmix@gmail.com> Signed-off-by: Dom Cobley <dc4@broadcom.com> Signed-off-by: Stephen Warren <swarren@wwwdotorg.org> Acked-by: Arnd Bergmann <arnd@arndb.de>
2012-09-13 01:57:26 +00:00
Required properties:
irqchip/bcm2835: Add support for being used as a second level controller The BCM2836 (Raspberry Pi 2) uses two levels of interrupt handling with the CPU-local interrupts being the root, so we need to register ours as chained off of the CPU's local interrupt. Signed-off-by: Eric Anholt <eric@anholt.net> Acked-by: Stephen Warren <swarren@wwwdotorg.org> Cc: linux-rpi-kernel@lists.infradead.org Cc: Lee Jones <lee@kernel.org> Cc: Jason Cooper <jason@lakedaemon.net> Cc: linux-arm-kernel@lists.infradead.org Link: http://lkml.kernel.org/r/1438902033-31477-3-git-send-email-eric@anholt.net Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2015-08-06 23:00:31 +00:00
- compatible : should be "brcm,bcm2835-armctrl-ic" or
"brcm,bcm2836-armctrl-ic"
ARM: bcm2835: add interrupt controller driver The BCM2835 contains a custom interrupt controller, which supports 72 interrupt sources using a 2-level register scheme. The interrupt controller, or the HW block containing it, is referred to occasionally as "armctrl" in the SoC documentation, hence the symbol naming in the code. This patch was extracted from git://github.com/lp0/linux.git branch rpi-split as of 2012/09/08, and modified as follows: * s/bcm2708/bcm2835/. * Modified device tree vendor prefix. * Moved implementation to drivers/irchip/. * Added devicetree documentation, and hence removed list of IRQs from bcm2835.dtsi. * Changed shift in MAKE_HWIRQ() and HWIRQ_BANK() from 8 to 5 to reduce the size of the hwirq space, and pass the total size of the hwirq space to irq_domain_add_linear(), rather than just the number of valid hwirqs; the two are different due to the hwirq space being sparse. * Added the interrupt controller DT node to the top-level of the DT, rather than nesting it inside a /axi node. Hence, changed the reg value since /axi had a ranges property. This seems simpler to me, but I'm not sure if everyone will like this change or not. * Don't set struct irq_domain_ops.map = irq_domain_simple_map, hence removing the need to patch include/linux/irqdomain.h or kernel/irq/irqdomain.c. * Simplified armctrl_of_init() using of_iomap(). * Removed unused IS_VALID_BANK()/IS_VALID_IRQ() macros. * Renamed armctrl_handle_irq() to prevent possible symbol clashes. * Made armctrl_of_init() static. * Removed comment "Each bank is registered as a separate interrupt controller" since this is no longer true. * Removed FSF address from license header. * Added my name to copyright header. Signed-off-by: Chris Boot <bootc@bootc.net> Signed-off-by: Simon Arlott <simon@fire.lp0.eu> Signed-off-by: Dom Cobley <popcornmix@gmail.com> Signed-off-by: Dom Cobley <dc4@broadcom.com> Signed-off-by: Stephen Warren <swarren@wwwdotorg.org> Acked-by: Arnd Bergmann <arnd@arndb.de>
2012-09-13 01:57:26 +00:00
- reg : Specifies base physical address and size of the registers.
- interrupt-controller : Identifies the node as an interrupt controller
- #interrupt-cells : Specifies the number of cells needed to encode an
interrupt source. The value shall be 2.
The 1st cell is the interrupt bank; 0 for interrupts in the "IRQ basic
pending" register, or 1/2 respectively for interrupts in the "IRQ pending
1/2" register.
The 2nd cell contains the interrupt number within the bank. Valid values
are 0..7 for bank 0, and 0..31 for bank 1.
irqchip/bcm2835: Add support for being used as a second level controller The BCM2836 (Raspberry Pi 2) uses two levels of interrupt handling with the CPU-local interrupts being the root, so we need to register ours as chained off of the CPU's local interrupt. Signed-off-by: Eric Anholt <eric@anholt.net> Acked-by: Stephen Warren <swarren@wwwdotorg.org> Cc: linux-rpi-kernel@lists.infradead.org Cc: Lee Jones <lee@kernel.org> Cc: Jason Cooper <jason@lakedaemon.net> Cc: linux-arm-kernel@lists.infradead.org Link: http://lkml.kernel.org/r/1438902033-31477-3-git-send-email-eric@anholt.net Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2015-08-06 23:00:31 +00:00
Additional required properties for brcm,bcm2836-armctrl-ic:
- interrupt-parent : Specifies the parent interrupt controller when this
controller is the second level.
- interrupts : Specifies the interrupt on the parent for this interrupt
controller to handle.
ARM: bcm2835: add interrupt controller driver The BCM2835 contains a custom interrupt controller, which supports 72 interrupt sources using a 2-level register scheme. The interrupt controller, or the HW block containing it, is referred to occasionally as "armctrl" in the SoC documentation, hence the symbol naming in the code. This patch was extracted from git://github.com/lp0/linux.git branch rpi-split as of 2012/09/08, and modified as follows: * s/bcm2708/bcm2835/. * Modified device tree vendor prefix. * Moved implementation to drivers/irchip/. * Added devicetree documentation, and hence removed list of IRQs from bcm2835.dtsi. * Changed shift in MAKE_HWIRQ() and HWIRQ_BANK() from 8 to 5 to reduce the size of the hwirq space, and pass the total size of the hwirq space to irq_domain_add_linear(), rather than just the number of valid hwirqs; the two are different due to the hwirq space being sparse. * Added the interrupt controller DT node to the top-level of the DT, rather than nesting it inside a /axi node. Hence, changed the reg value since /axi had a ranges property. This seems simpler to me, but I'm not sure if everyone will like this change or not. * Don't set struct irq_domain_ops.map = irq_domain_simple_map, hence removing the need to patch include/linux/irqdomain.h or kernel/irq/irqdomain.c. * Simplified armctrl_of_init() using of_iomap(). * Removed unused IS_VALID_BANK()/IS_VALID_IRQ() macros. * Renamed armctrl_handle_irq() to prevent possible symbol clashes. * Made armctrl_of_init() static. * Removed comment "Each bank is registered as a separate interrupt controller" since this is no longer true. * Removed FSF address from license header. * Added my name to copyright header. Signed-off-by: Chris Boot <bootc@bootc.net> Signed-off-by: Simon Arlott <simon@fire.lp0.eu> Signed-off-by: Dom Cobley <popcornmix@gmail.com> Signed-off-by: Dom Cobley <dc4@broadcom.com> Signed-off-by: Stephen Warren <swarren@wwwdotorg.org> Acked-by: Arnd Bergmann <arnd@arndb.de>
2012-09-13 01:57:26 +00:00
The interrupt sources are as follows:
Bank 0:
0: ARM_TIMER
1: ARM_MAILBOX
2: ARM_DOORBELL_0
3: ARM_DOORBELL_1
4: VPU0_HALTED
5: VPU1_HALTED
6: ILLEGAL_TYPE0
7: ILLEGAL_TYPE1
Bank 1:
0: TIMER0
1: TIMER1
2: TIMER2
3: TIMER3
4: CODEC0
5: CODEC1
6: CODEC2
7: VC_JPEG
8: ISP
9: VC_USB
10: VC_3D
11: TRANSPOSER
12: MULTICORESYNC0
13: MULTICORESYNC1
14: MULTICORESYNC2
15: MULTICORESYNC3
16: DMA0
17: DMA1
18: VC_DMA2
19: VC_DMA3
20: DMA4
21: DMA5
22: DMA6
23: DMA7
24: DMA8
25: DMA9
26: DMA10
dt/bindings: bcm2835: correct description for DMA-int Interrupt DMA11 is the shared interrupt for DMA channels 11 to 14 Interrupt DMA12 is the shared interrupt triggering for any DMA channel (this also includes DMA channel 15) Signed-off-by: Martin Sperl <kernel@martin.sperl.org> Reviewed-by: Eric Anholt <eric@anholt.net> Acked-by: Rob Herring <robh@kernel.org>
2016-03-05 18:02:49 +00:00
27: DMA11-14 - shared interrupt for DMA 11 to 14
28: DMAALL - triggers on all dma interrupts (including chanel 15)
ARM: bcm2835: add interrupt controller driver The BCM2835 contains a custom interrupt controller, which supports 72 interrupt sources using a 2-level register scheme. The interrupt controller, or the HW block containing it, is referred to occasionally as "armctrl" in the SoC documentation, hence the symbol naming in the code. This patch was extracted from git://github.com/lp0/linux.git branch rpi-split as of 2012/09/08, and modified as follows: * s/bcm2708/bcm2835/. * Modified device tree vendor prefix. * Moved implementation to drivers/irchip/. * Added devicetree documentation, and hence removed list of IRQs from bcm2835.dtsi. * Changed shift in MAKE_HWIRQ() and HWIRQ_BANK() from 8 to 5 to reduce the size of the hwirq space, and pass the total size of the hwirq space to irq_domain_add_linear(), rather than just the number of valid hwirqs; the two are different due to the hwirq space being sparse. * Added the interrupt controller DT node to the top-level of the DT, rather than nesting it inside a /axi node. Hence, changed the reg value since /axi had a ranges property. This seems simpler to me, but I'm not sure if everyone will like this change or not. * Don't set struct irq_domain_ops.map = irq_domain_simple_map, hence removing the need to patch include/linux/irqdomain.h or kernel/irq/irqdomain.c. * Simplified armctrl_of_init() using of_iomap(). * Removed unused IS_VALID_BANK()/IS_VALID_IRQ() macros. * Renamed armctrl_handle_irq() to prevent possible symbol clashes. * Made armctrl_of_init() static. * Removed comment "Each bank is registered as a separate interrupt controller" since this is no longer true. * Removed FSF address from license header. * Added my name to copyright header. Signed-off-by: Chris Boot <bootc@bootc.net> Signed-off-by: Simon Arlott <simon@fire.lp0.eu> Signed-off-by: Dom Cobley <popcornmix@gmail.com> Signed-off-by: Dom Cobley <dc4@broadcom.com> Signed-off-by: Stephen Warren <swarren@wwwdotorg.org> Acked-by: Arnd Bergmann <arnd@arndb.de>
2012-09-13 01:57:26 +00:00
29: AUX
30: ARM
31: VPUDMA
Bank 2:
0: HOSTPORT
1: VIDEOSCALER
2: CCP2TX
3: SDC
4: DSI0
5: AVE
6: CAM0
7: CAM1
8: HDMI0
9: HDMI1
10: PIXELVALVE1
11: I2CSPISLV
12: DSI1
13: PWA0
14: PWA1
15: CPR
16: SMI
17: GPIO0
18: GPIO1
19: GPIO2
20: GPIO3
21: VC_I2C
22: VC_SPI
23: VC_I2SPCM
24: VC_SDIO
25: VC_UART
26: SLIMBUS
27: VEC
28: CPG
29: RNG
30: VC_ARASANSDIO
31: AVSPMON
Example:
irqchip/bcm2835: Add support for being used as a second level controller The BCM2836 (Raspberry Pi 2) uses two levels of interrupt handling with the CPU-local interrupts being the root, so we need to register ours as chained off of the CPU's local interrupt. Signed-off-by: Eric Anholt <eric@anholt.net> Acked-by: Stephen Warren <swarren@wwwdotorg.org> Cc: linux-rpi-kernel@lists.infradead.org Cc: Lee Jones <lee@kernel.org> Cc: Jason Cooper <jason@lakedaemon.net> Cc: linux-arm-kernel@lists.infradead.org Link: http://lkml.kernel.org/r/1438902033-31477-3-git-send-email-eric@anholt.net Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2015-08-06 23:00:31 +00:00
/* BCM2835, first level */
ARM: bcm2835: add interrupt controller driver The BCM2835 contains a custom interrupt controller, which supports 72 interrupt sources using a 2-level register scheme. The interrupt controller, or the HW block containing it, is referred to occasionally as "armctrl" in the SoC documentation, hence the symbol naming in the code. This patch was extracted from git://github.com/lp0/linux.git branch rpi-split as of 2012/09/08, and modified as follows: * s/bcm2708/bcm2835/. * Modified device tree vendor prefix. * Moved implementation to drivers/irchip/. * Added devicetree documentation, and hence removed list of IRQs from bcm2835.dtsi. * Changed shift in MAKE_HWIRQ() and HWIRQ_BANK() from 8 to 5 to reduce the size of the hwirq space, and pass the total size of the hwirq space to irq_domain_add_linear(), rather than just the number of valid hwirqs; the two are different due to the hwirq space being sparse. * Added the interrupt controller DT node to the top-level of the DT, rather than nesting it inside a /axi node. Hence, changed the reg value since /axi had a ranges property. This seems simpler to me, but I'm not sure if everyone will like this change or not. * Don't set struct irq_domain_ops.map = irq_domain_simple_map, hence removing the need to patch include/linux/irqdomain.h or kernel/irq/irqdomain.c. * Simplified armctrl_of_init() using of_iomap(). * Removed unused IS_VALID_BANK()/IS_VALID_IRQ() macros. * Renamed armctrl_handle_irq() to prevent possible symbol clashes. * Made armctrl_of_init() static. * Removed comment "Each bank is registered as a separate interrupt controller" since this is no longer true. * Removed FSF address from license header. * Added my name to copyright header. Signed-off-by: Chris Boot <bootc@bootc.net> Signed-off-by: Simon Arlott <simon@fire.lp0.eu> Signed-off-by: Dom Cobley <popcornmix@gmail.com> Signed-off-by: Dom Cobley <dc4@broadcom.com> Signed-off-by: Stephen Warren <swarren@wwwdotorg.org> Acked-by: Arnd Bergmann <arnd@arndb.de>
2012-09-13 01:57:26 +00:00
intc: interrupt-controller {
compatible = "brcm,bcm2835-armctrl-ic";
reg = <0x7e00b200 0x200>;
interrupt-controller;
#interrupt-cells = <2>;
};
irqchip/bcm2835: Add support for being used as a second level controller The BCM2836 (Raspberry Pi 2) uses two levels of interrupt handling with the CPU-local interrupts being the root, so we need to register ours as chained off of the CPU's local interrupt. Signed-off-by: Eric Anholt <eric@anholt.net> Acked-by: Stephen Warren <swarren@wwwdotorg.org> Cc: linux-rpi-kernel@lists.infradead.org Cc: Lee Jones <lee@kernel.org> Cc: Jason Cooper <jason@lakedaemon.net> Cc: linux-arm-kernel@lists.infradead.org Link: http://lkml.kernel.org/r/1438902033-31477-3-git-send-email-eric@anholt.net Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2015-08-06 23:00:31 +00:00
/* BCM2836, second level */
intc: interrupt-controller {
compatible = "brcm,bcm2836-armctrl-ic";
reg = <0x7e00b200 0x200>;
interrupt-controller;
#interrupt-cells = <2>;
interrupt-parent = <&local_intc>;
interrupts = <8>;
};
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