From e261501d05bd2df244d31e0866b1e81776766ecf Mon Sep 17 00:00:00 2001 From: Nicolas Ferre Date: Tue, 22 Nov 2011 22:26:09 +0100 Subject: ARM: at91/aic: add irq domain and device tree support Add an irqdomain for the AIC interrupt controller. The device tree support is mapping the registers and is using the irq_domain_add_legacy() to manage hwirq translation. The documentation is describing the meaning of the two cells required for using this "interrupt-controller" in a device tree node. Signed-off-by: Nicolas Ferre Acked-by: Jean-Christophe PLAGNIOL-VILLARD --- .../devicetree/bindings/arm/atmel-aic.txt | 38 ++++++++++++++++++++++ 1 file changed, 38 insertions(+) create mode 100644 Documentation/devicetree/bindings/arm/atmel-aic.txt (limited to 'Documentation/devicetree') diff --git a/Documentation/devicetree/bindings/arm/atmel-aic.txt b/Documentation/devicetree/bindings/arm/atmel-aic.txt new file mode 100644 index 000000000000..aabca4f83402 --- /dev/null +++ b/Documentation/devicetree/bindings/arm/atmel-aic.txt @@ -0,0 +1,38 @@ +* Advanced Interrupt Controller (AIC) + +Required properties: +- compatible: Should be "atmel,-aic" +- interrupt-controller: Identifies the node as an interrupt controller. +- interrupt-parent: For single AIC system, it is an empty property. +- #interrupt-cells: The number of cells to define the interrupts. It sould be 2. + The first cell is the IRQ number (aka "Peripheral IDentifier" on datasheet). + The second cell is used to specify flags: + bits[3:0] trigger type and level flags: + 1 = low-to-high edge triggered. + 2 = high-to-low edge triggered. + 4 = active high level-sensitive. + 8 = active low level-sensitive. + Valid combinations are 1, 2, 3, 4, 8. + Default flag for internal sources should be set to 4 (active high). +- reg: Should contain AIC registers location and length + +Examples: + /* + * AIC + */ + aic: interrupt-controller@fffff000 { + compatible = "atmel,at91rm9200-aic"; + interrupt-controller; + interrupt-parent; + #interrupt-cells = <2>; + reg = <0xfffff000 0x200>; + }; + + /* + * An interrupt generating device that is wired to an AIC. + */ + dma: dma-controller@ffffec00 { + compatible = "atmel,at91sam9g45-dma"; + reg = <0xffffec00 0x200>; + interrupts = <21 4>; + }; -- cgit v1.2.2 From 21f81872788b8089ec4214afad8fc6a0a23f70c8 Mon Sep 17 00:00:00 2001 From: Nicolas Ferre Date: Sat, 11 Feb 2012 15:41:40 +0100 Subject: ARM: at91/gpio: add irqdomain and DT support Add "legacy" type of irqdomain to preserve old-style numbering and allow smooth transition for both DT and non-DT cases. Original idea and code by Jean-Christophe Plagniol-Villard. Signed-off-by: Nicolas Ferre Acked-by: Jean-Christophe PLAGNIOL-VILLARD --- .../devicetree/bindings/gpio/gpio_atmel.txt | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) create mode 100644 Documentation/devicetree/bindings/gpio/gpio_atmel.txt (limited to 'Documentation/devicetree') diff --git a/Documentation/devicetree/bindings/gpio/gpio_atmel.txt b/Documentation/devicetree/bindings/gpio/gpio_atmel.txt new file mode 100644 index 000000000000..a7bcaec913bf --- /dev/null +++ b/Documentation/devicetree/bindings/gpio/gpio_atmel.txt @@ -0,0 +1,20 @@ +* Atmel GPIO controller (PIO) + +Required properties: +- compatible: "atmel,at91rm9200-gpio" +- reg: Should contain GPIO controller registers location and length +- interrupts: Should be the port interrupt shared by all the pins. +- #gpio-cells: Should be two. The first cell is the pin number and + the second cell is used to specify optional parameters (currently + unused). +- gpio-controller: Marks the device node as a GPIO controller. + +Example: + pioA: gpio@fffff200 { + compatible = "atmel,at91rm9200-gpio"; + reg = <0xfffff200 0x100>; + interrupts = <2 4>; + #gpio-cells = <2>; + gpio-controller; + }; + -- cgit v1.2.2 From 23fa648fd32658ca295de3ef2b7c883c7b8a6120 Mon Sep 17 00:00:00 2001 From: Jean-Christophe PLAGNIOL-VILLARD Date: Mon, 27 Feb 2012 11:19:34 +0100 Subject: ARM: at91: pit add DT support Retreive registers address and IRQ from device tree entry. Called from at91_dt_init_irq() so that timers are up-n-running when timers initialization will occur. Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD [nicolas.ferre@atmel.com: change error path and interrupts property handling] Signed-off-by: Nicolas Ferre --- Documentation/devicetree/bindings/arm/atmel-at91.txt | 8 ++++++++ 1 file changed, 8 insertions(+) create mode 100644 Documentation/devicetree/bindings/arm/atmel-at91.txt (limited to 'Documentation/devicetree') diff --git a/Documentation/devicetree/bindings/arm/atmel-at91.txt b/Documentation/devicetree/bindings/arm/atmel-at91.txt new file mode 100644 index 000000000000..380f711a2021 --- /dev/null +++ b/Documentation/devicetree/bindings/arm/atmel-at91.txt @@ -0,0 +1,8 @@ +Atmel AT91 device tree bindings. +================================ + +PIT Timer required properties: +- compatible: Should be "atmel,at91sam9260-pit" +- reg: Should contain registers location and length +- interrupts: Should contain interrupt for the PIT which is the IRQ line + shared across all System Controller members. -- cgit v1.2.2 From 3a61a5dae49bf3d1afb7f75c8acb3607f26565af Mon Sep 17 00:00:00 2001 From: Nicolas Ferre Date: Thu, 19 Jan 2012 10:13:40 +0100 Subject: ARM: at91/tc: add device tree support to atmel_tclib Device tree support added to atmel_tclib: the generic Timer Counter library. This is used by the clocksource/clockevent driver tcb_clksrc. The current DT enabled platforms are also modified to use it: - .dtsi files are modified to add Timer Counter Block entries - alias are created to allow identification of each block - clkdev lookup tables are added for clocks identification. Signed-off-by: Nicolas Ferre Acked-by: Jean-Christophe PLAGNIOL-VILLARD Acked-by: Grant Likely --- .../devicetree/bindings/arm/atmel-at91.txt | 24 ++++++++++++++++++++++ 1 file changed, 24 insertions(+) (limited to 'Documentation/devicetree') diff --git a/Documentation/devicetree/bindings/arm/atmel-at91.txt b/Documentation/devicetree/bindings/arm/atmel-at91.txt index 380f711a2021..1aeaf6f2a1ba 100644 --- a/Documentation/devicetree/bindings/arm/atmel-at91.txt +++ b/Documentation/devicetree/bindings/arm/atmel-at91.txt @@ -6,3 +6,27 @@ PIT Timer required properties: - reg: Should contain registers location and length - interrupts: Should contain interrupt for the PIT which is the IRQ line shared across all System Controller members. + +TC/TCLIB Timer required properties: +- compatible: Should be "atmel,-pit". + can be "at91rm9200" or "at91sam9x5" +- reg: Should contain registers location and length +- interrupts: Should contain all interrupts for the TC block + Note that you can specify several interrupt cells if the TC + block has one interrupt per channel. + +Examples: + +One interrupt per TC block: + tcb0: timer@fff7c000 { + compatible = "atmel,at91rm9200-tcb"; + reg = <0xfff7c000 0x100>; + interrupts = <18 4>; + }; + +One interrupt per TC channel in a TC block: + tcb1: timer@fffdc000 { + compatible = "atmel,at91rm9200-tcb"; + reg = <0xfffdc000 0x100>; + interrupts = <26 4 27 4 28 4>; + }; -- cgit v1.2.2 From 582d5fbd4e81e7debe5f3a0e6ce1a0bcdf636c6e Mon Sep 17 00:00:00 2001 From: Nicolas Ferre Date: Tue, 20 Jul 2010 19:18:51 +0200 Subject: ARM: at91/pio: add new PIO3 features This patch adds the support for new PIO controller found on some at91sam SOCs. - more peripheral multiplexing - more features to configure on a PIO (pull-down, Schmitt trigger, debouncer) - support for several IRQ triggering features (type and polarity) Support for those new features are retrieved from the device tree compatibility string. Debugfs at91_gpio file is updated to monitor configuration. Signed-off-by: Nicolas Ferre --- Documentation/devicetree/bindings/gpio/gpio_atmel.txt | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'Documentation/devicetree') diff --git a/Documentation/devicetree/bindings/gpio/gpio_atmel.txt b/Documentation/devicetree/bindings/gpio/gpio_atmel.txt index a7bcaec913bf..66efc804806a 100644 --- a/Documentation/devicetree/bindings/gpio/gpio_atmel.txt +++ b/Documentation/devicetree/bindings/gpio/gpio_atmel.txt @@ -1,7 +1,7 @@ * Atmel GPIO controller (PIO) Required properties: -- compatible: "atmel,at91rm9200-gpio" +- compatible: "atmel,-gpio", where is at91rm9200 or at91sam9x5. - reg: Should contain GPIO controller registers location and length - interrupts: Should be the port interrupt shared by all the pins. - #gpio-cells: Should be two. The first cell is the pin number and -- cgit v1.2.2