From 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 Mon Sep 17 00:00:00 2001 From: Yunhong Jiang Date: Tue, 4 Aug 2015 12:17:53 -0700 Subject: Add the rt linux 4.1.3-rt3 as base Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang --- .../bindings/pinctrl/brcm,bcm2835-gpio.txt | 74 ++++++++++++++++++++++ 1 file changed, 74 insertions(+) create mode 100644 kernel/Documentation/devicetree/bindings/pinctrl/brcm,bcm2835-gpio.txt (limited to 'kernel/Documentation/devicetree/bindings/pinctrl/brcm,bcm2835-gpio.txt') diff --git a/kernel/Documentation/devicetree/bindings/pinctrl/brcm,bcm2835-gpio.txt b/kernel/Documentation/devicetree/bindings/pinctrl/brcm,bcm2835-gpio.txt new file mode 100644 index 000000000..2569866c6 --- /dev/null +++ b/kernel/Documentation/devicetree/bindings/pinctrl/brcm,bcm2835-gpio.txt @@ -0,0 +1,74 @@ +Broadcom BCM2835 GPIO (and pinmux) controller + +The BCM2835 GPIO module is a combined GPIO controller, (GPIO) interrupt +controller, and pinmux/control device. + +Required properties: +- compatible: "brcm,bcm2835-gpio" +- reg: Should contain the physical address of the GPIO module's registers. +- gpio-controller: Marks the device node as a GPIO controller. +- #gpio-cells : Should be two. The first cell is the pin number and the + second cell is used to specify optional parameters: + - bit 0 specifies polarity (0 for normal, 1 for inverted) +- interrupts : The interrupt outputs from the controller. One interrupt per + individual bank followed by the "all banks" interrupt. +- interrupt-controller: Marks the device node as an interrupt controller. +- #interrupt-cells : Should be 2. + The first cell is the GPIO number. + 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. + +Please refer to ../gpio/gpio.txt for a general description of GPIO bindings. + +Please refer to pinctrl-bindings.txt in this directory for details of the +common pinctrl bindings used by client devices, including the meaning of the +phrase "pin configuration node". + +Each pin configuration node lists the pin(s) to which it applies, and one or +more of the mux function to select on those pin(s), and pull-up/down +configuration. Each subnode only affects those parameters that are explicitly +listed. In other words, a subnode that lists only a mux function implies no +information about any pull configuration. Similarly, a subnode that lists only +a pul parameter implies no information about the mux function. + +Required subnode-properties: +- brcm,pins: An array of cells. Each cell contains the ID of a pin. Valid IDs + are the integer GPIO IDs; 0==GPIO0, 1==GPIO1, ... 53==GPIO53. + +Optional subnode-properties: +- brcm,function: Integer, containing the function to mux to the pin(s): + 0: GPIO in + 1: GPIO out + 2: alt5 + 3: alt4 + 4: alt0 + 5: alt1 + 6: alt2 + 7: alt3 +- brcm,pull: Integer, representing the pull-down/up to apply to the pin(s): + 0: none + 1: down + 2: up + +Each of brcm,function and brcm,pull may contain either a single value which +will be applied to all pins in brcm,pins, or 1 value for each entry in +brcm,pins. + +Example: + + gpio: gpio { + compatible = "brcm,bcm2835-gpio"; + reg = <0x2200000 0xb4>; + interrupts = <2 17>, <2 19>, <2 18>, <2 20>; + + gpio-controller; + #gpio-cells = <2>; + + interrupt-controller; + #interrupt-cells = <2>; + }; -- cgit 1.2.3-korg