From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Meador Inge To: linuxppc-dev@lists.ozlabs.org Subject: [PATCH v2 1/2] powerpc: document the FSL MPIC message register binding Date: Fri, 20 May 2011 11:36:38 -0500 Message-Id: <1305909399-26969-2-git-send-email-meador_inge@mentor.com> In-Reply-To: <1305909399-26969-1-git-send-email-meador_inge@mentor.com> References: <1305909399-26969-1-git-send-email-meador_inge@mentor.com> Cc: openmcapi-dev@googlegroups.com, devicetree-discuss@lists.ozlabs.org, Hollis Blanchard List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , This binding documents how the message register blocks found in some FSL MPIC implementations shall be represented in a device tree. Signed-off-by: Meador Inge Cc: Hollis Blanchard Cc: Grant Likely Cc: Benjamin Herrenschmidt --- .../devicetree/bindings/powerpc/fsl/mpic-msgr.txt | 62 ++++++++++++++++++++ 1 files changed, 62 insertions(+), 0 deletions(-) create mode 100644 Documentation/devicetree/bindings/powerpc/fsl/mpic-msgr.txt diff --git a/Documentation/devicetree/bindings/powerpc/fsl/mpic-msgr.txt b/Documentation/devicetree/bindings/powerpc/fsl/mpic-msgr.txt new file mode 100644 index 0000000..385dba6 --- /dev/null +++ b/Documentation/devicetree/bindings/powerpc/fsl/mpic-msgr.txt @@ -0,0 +1,62 @@ +* FSL MPIC Message Registers + +This binding specifies what properties must be available in the device tree +representation of the message register groups found in some FSL MPIC +implementations. + +Required properties: + + - compatible: Specifies the compatibility list for the message register + block. The type shall be and the value shall be of the form + "fsl,mpic-v-msgr", where is the version number of + the MPIC containing the message registers. + + - reg: Specifies the base physical address(s) and size(s) of the + message register block's addressable register space. The type shall be + . + + - interrupts: Specifies a list of interrupt source and level-sense pairs. + The type shall be . The length shall be equal to + the number of bits set in the 'msg-receive-mask' property value. + +Optional properties: + + - mpic-msgr-receive-mask: Specifies what registers in the containing block + are allowed to receive interrupts. The value is a bit mask where a set + bit at bit 'n' indicates that message register 'n' can receive interrupts. + The type shall be . If not present, then all of + the message registers in the block are available. + +Aliases: + + An alias should be created for every message register block. They are not + required, though. However, are particular implementation of this binding + may require aliases to be present. Aliases are of the form + 'mpic-msgr-block', where is an integer specifying the block's number. + Numbers shall start at 0. + +Example: + + aliases { + mpic-msgr-block0 = &mpic_msgr_block0; + mpic-msgr-block1 = &mpic_msgr_block1; + }; + + mpic_msgr_block0: mpic-msgr-block@41400 { + compatible = "fsl,mpic-v3.1-msgr"; + reg = <0x41400 0x200>; + // Message registers 0 and 2 in this block can receive interrupts on + // sources 0xb0 and 0xb2, respectively. + interrupts = <0xb0 2 0xb2 2>; + mpic-msgr-receive-mask = <0x5>; + }; + + mpic_msgr_block1: mpic-msgr-block@42400 { + compatible = "fsl,mpic-v3.1-msgr"; + reg = <0x42400 0x200>; + // Message registers 0 and 2 in this block can receive interrupts on + // sources 0xb4 and 0xb6, respectively. + interrupts = <0xb4 2 0xb6 2>; + mpic-msgr-receive-mask = <0x5>; + }; + -- 1.6.3.3