diff options
author | Benoit Cousson <b-cousson@ti.com> | 2011-08-16 11:53:02 +0200 |
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committer | Benoit Cousson <b-cousson@ti.com> | 2012-03-05 23:02:53 +0100 |
commit | 384ebe1c2849160d040df3e68634ec506f13d9ff (patch) | |
tree | 75fa1a39e94203c5a85a61300578aaac4edfc9b1 /Documentation/devicetree/bindings/gpio/gpio-omap.txt | |
parent | 96751fcbe5438e95514b025e9cee7a6d38038f40 (diff) | |
download | linux-384ebe1c2849160d040df3e68634ec506f13d9ff.tar.gz |
gpio/omap: Add DT support to GPIO driver
Adapt the GPIO driver to retrieve information from a DT file.
Allocate the irq_base dynamically and rename bank->virtual_irq_start
to bank->irq_base.
Change irq_base type to int instead of u16 to match irq_alloc_descs
output.
Add documentation for GPIO properties specific to OMAP.
Signed-off-by: Benoit Cousson <b-cousson@ti.com>
Cc: Tarun Kanti DebBarma <tarun.kanti@ti.com>
Acked-by: Rob Herring <rob.herring@calxeda.com>
Diffstat (limited to 'Documentation/devicetree/bindings/gpio/gpio-omap.txt')
-rw-r--r-- | Documentation/devicetree/bindings/gpio/gpio-omap.txt | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/gpio/gpio-omap.txt b/Documentation/devicetree/bindings/gpio/gpio-omap.txt new file mode 100644 index 000000000000..bff51a2fee1e --- /dev/null +++ b/Documentation/devicetree/bindings/gpio/gpio-omap.txt @@ -0,0 +1,36 @@ +OMAP GPIO controller bindings + +Required properties: +- compatible: + - "ti,omap2-gpio" for OMAP2 controllers + - "ti,omap3-gpio" for OMAP3 controllers + - "ti,omap4-gpio" for OMAP4 controllers +- #gpio-cells : Should be two. + - first cell is the pin number + - second cell is used to specify optional parameters (unused) +- gpio-controller : Marks the device node as a GPIO controller. +- #interrupt-cells : Should be 2. +- interrupt-controller: Mark the device node as an interrupt controller + 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. + +OMAP specific properties: +- ti,hwmods: Name of the hwmod associated to the GPIO: + "gpio<X>", <X> being the 1-based instance number from the HW spec + + +Example: + +gpio4: gpio4 { + compatible = "ti,omap4-gpio"; + ti,hwmods = "gpio4"; + #gpio-cells = <2>; + gpio-controller; + #interrupt-cells = <2>; + interrupt-controller; +}; |