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Mon, 13 Feb 2017 20:50:53 -0800 (PST) Received: from anup-HP-Compaq-8100-Elite-CMT-PC.dhcp.avagotech.net ([192.19.237.250]) by smtp.gmail.com with ESMTPSA id p46sm8873463qta.33.2017.02.13.20.50.49 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Mon, 13 Feb 2017 20:50:52 -0800 (PST) From: Anup Patel To: Jassi Brar , Rob Herring Subject: [RESEND PATCH v4 2/2] dt-bindings: Add DT bindings info for FlexRM ring manager Date: Tue, 14 Feb 2017 10:19:41 +0530 Message-Id: <1487047781-25513-3-git-send-email-anup.patel@broadcom.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1487047781-25513-1-git-send-email-anup.patel@broadcom.com> References: <1487047781-25513-1-git-send-email-anup.patel@broadcom.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20170213_205116_489266_F4BC3D04 X-CRM114-Status: GOOD ( 15.61 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , devicetree@vger.kernel.org, Anup Patel , Scott Branden , Ray Jui , linux-kernel@vger.kernel.org, Pramod KUMAR , bcm-kernel-feedback-list@broadcom.com, Rob Rice , linux-arm-kernel@lists.infradead.org MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP This patch adds device tree bindings document for the FlexRM ring manager found on Broadcom iProc SoCs. Acked-by: Rob Herring Reviewed-by: Ray Jui Reviewed-by: Scott Branden Signed-off-by: Anup Patel --- .../bindings/mailbox/brcm,iproc-flexrm-mbox.txt | 59 ++++++++++++++++++++++ 1 file changed, 59 insertions(+) create mode 100644 Documentation/devicetree/bindings/mailbox/brcm,iproc-flexrm-mbox.txt diff --git a/Documentation/devicetree/bindings/mailbox/brcm,iproc-flexrm-mbox.txt b/Documentation/devicetree/bindings/mailbox/brcm,iproc-flexrm-mbox.txt new file mode 100644 index 0000000..752ae6b --- /dev/null +++ b/Documentation/devicetree/bindings/mailbox/brcm,iproc-flexrm-mbox.txt @@ -0,0 +1,59 @@ +Broadcom FlexRM Ring Manager +============================ +The Broadcom FlexRM ring manager provides a set of rings which can be +used to submit work to offload engines. An SoC may have multiple FlexRM +hardware blocks. There is one device tree entry per FlexRM block. The +FlexRM driver will create a mailbox-controller instance for given FlexRM +hardware block where each mailbox channel is a separate FlexRM ring. + +Required properties: +-------------------- +- compatible: Should be "brcm,iproc-flexrm-mbox" +- reg: Specifies base physical address and size of the FlexRM + ring registers +- msi-parent: Phandles (and potential Device IDs) to MSI controllers + The FlexRM engine will send MSIs (instead of wired + interrupts) to CPU. There is one MSI for each FlexRM ring. + Refer devicetree/bindings/interrupt-controller/msi.txt +- #mbox-cells: Specifies the number of cells needed to encode a mailbox + channel. This should be 3. + + The 1st cell is the mailbox channel number. + + The 2nd cell contains MSI completion threshold. This is the + number of completion messages for which FlexRM will inject + one MSI interrupt to CPU. + + The 3nd cell contains MSI timer value representing time for + which FlexRM will wait to accumulate N completion messages + where N is the value specified by 2nd cell above. If FlexRM + does not get required number of completion messages in time + specified by this cell then it will inject one MSI interrupt + to CPU provided atleast one completion message is available. + +Optional properties: +-------------------- +- dma-coherent: Present if DMA operations made by the FlexRM engine (such + as DMA descriptor access, access to buffers pointed by DMA + descriptors and read/write pointer updates to DDR) are + cache coherent with the CPU. + +Example: +-------- +crypto_mbox: mbox@67000000 { + compatible = "brcm,iproc-flexrm-mbox"; + reg = <0x67000000 0x200000>; + msi-parent = <&gic_its 0x7f00>; + #mbox-cells = <3>; +}; + +crypto@672c0000 { + compatible = "brcm,spu2-v2-crypto"; + reg = <0x672c0000 0x1000>; + mboxes = <&crypto_mbox 0 0x1 0xffff>, + <&crypto_mbox 1 0x1 0xffff>, + <&crypto_mbox 16 0x1 0xffff>, + <&crypto_mbox 17 0x1 0xffff>, + <&crypto_mbox 30 0x1 0xffff>, + <&crypto_mbox 31 0x1 0xffff>; +};