From mboxrd@z Thu Jan 1 00:00:00 1970 From: kernel-TqfNSX0MhmxHKSADF0wUEw@public.gmane.org Subject: [PATCH v3 2/2] dt: brcm,bcm2835-aux-spi: add binding documentation for new spi-bcm2835aux Date: Sun, 12 Jul 2015 01:13:36 +0000 Message-ID: <1436663617-3056-2-git-send-email-kernel@martin.sperl.org> References: <1436663617-3056-1-git-send-email-kernel@martin.sperl.org> Cc: Martin Sperl To: Stephen Warren , Lee Jones , Mark Brown , devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-rpi-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, linux-spi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org Return-path: In-Reply-To: <1436663617-3056-1-git-send-email-kernel-TqfNSX0MhmxHKSADF0wUEw@public.gmane.org> Sender: linux-spi-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-ID: From: Martin Sperl Document the necessary device-tree bindings of the spi-bcm2835aux driver. Signed-off-by: Martin Sperl --- .../bindings/spi/brcm,bcm2835-aux-spi.txt | 46 ++++++++++++++++++++ 1 file changed, 46 insertions(+) create mode 100644 Documentation/devicetree/bindings/spi/brcm,bcm2835-aux-spi.txt Changelog: V1->V2: fixed typo added cs-gpios V2->V3: added reference to spi-bus in cs-gpios added required additional config for syscon diff --git a/Documentation/devicetree/bindings/spi/brcm,bcm2835-aux-spi.txt b/Documentation/devicetree/bindings/spi/brcm,bcm2835-aux-spi.txt new file mode 100644 index 0000000..ce5f3be --- /dev/null +++ b/Documentation/devicetree/bindings/spi/brcm,bcm2835-aux-spi.txt @@ -0,0 +1,46 @@ +Broadcom BCM2835 auxiliar SPI1/2 controller + +The BCM2835 contains two forms of SPI master controller, one known simply as +SPI0, and the other known as the "Universal SPI Master"; part of the +auxiliary block. This binding applies to the SPI1/2 controller. + +Required properties: +- compatible: Should be "brcm,bcm2835-aux-spi". +- reg: Should contain register location and length for the spi block + as well as for the common aux block control +- interrupts: Should contain shared interrupt of the aux block +- clocks: The clock feeding the SPI controller. +- cs-gpios: the cs-gpios (native cs is NOT supported) + see also spi-bus.txt +- syscon: the syscon config entry to handle the shared + register access by multiple drivers + +Example: + +spi1@7e215080 { + compatible = "brcm,bcm2835-aux-spi"; + reg = <0x7e215080 0x40>; + interrupts = <1 29>; + clocks = <&clk_spi>; + #address-cells = <1>; + #size-cells = <0>; + cs-gpios = <&gpio 18>, <&gpio 17>, <&gpio 16>; + syscon = <&aux_syscon>; +}; + +spi2@7e2150c0 { + compatible = "brcm,bcm2835-aux-spi"; + reg = <0x7e2150c0 0x40>; + interrupts = <1 29>; + clocks = <&clk_spi>; + #address-cells = <1>; + #size-cells = <0>; + cs-gpios = <&gpio 43>, <&gpio 44>, <&gpio 45>; + syscon = <&aux_syscon>; +}; + +/* the necessary syscon config referenced above */ +aux_syscon: aux_syscon@0x7e215000 { + compatible = "syscon"; + reg = <0x7e215000 0x08>; +}; -- 1.7.10.4 -- To unsubscribe from this list: send the line "unsubscribe linux-spi" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html