linux-kernel - [PATCH 2/2] ARM: dts: NSP: Add mailbox (PDC) to NSP

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Date:   Wed, 22 Feb 2017 15:42:26 -0500
From:   Steve Lin <steven.lin1@...adcom.com>
To:     jassisinghbrar@...il.com, robh+dt@...nel.org, mark.rutland@....com,
        ray.jui@...adcom.com, scott.branden@...adcom.com,
        jon.mason@...adcom.com, linux@...linux.org.uk,
        rob.rice@...adcom.com
Cc:     bcm-kernel-feedback-list@...adcom.com, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Steve Lin <steven.lin1@...adcom.com>
Subject: [PATCH 2/2] ARM: dts: NSP: Add mailbox (PDC) to NSP

Adds mailbox / PDC to NSP device tree.  Needs new compatibility string
to differentiate from NS2 version.

Signed-off-by: Steve Lin <steven.lin1@...adcom.com>
---
 .../devicetree/bindings/mailbox/brcm,iproc-pdc-mbox.txt          | 6 ++++--
 arch/arm/boot/dts/bcm-nsp.dtsi                                   | 9 +++++++++
 2 files changed, 13 insertions(+), 2 deletions(-)

diff --git a/Documentation/devicetree/bindings/mailbox/brcm,iproc-pdc-mbox.txt b/Documentation/devicetree/bindings/mailbox/brcm,iproc-pdc-mbox.txt
index 411ccf4..0f3ee81 100644
--- a/Documentation/devicetree/bindings/mailbox/brcm,iproc-pdc-mbox.txt
+++ b/Documentation/devicetree/bindings/mailbox/brcm,iproc-pdc-mbox.txt
@@ -1,9 +1,11 @@
 The PDC driver manages data transfer to and from various offload engines
 on some Broadcom SoCs. An SoC may have multiple PDC hardware blocks. There is
-one device tree entry per block.
+one device tree entry per block.  On some chips, the PDC functionality is
+handled by the FA2 (Northstar Plus).
 
 Required properties:
-- compatible : Should be "brcm,iproc-pdc-mbox".
+- compatible : Should be "brcm,iproc-pdc-mbox" or "brcm,iproc-fa2-mbox" for
+  FA2/Northstar Plus.
 - reg: Should contain PDC registers location and length.
 - interrupts: Should contain the IRQ line for the PDC.
 - #mbox-cells: 1
diff --git a/arch/arm/boot/dts/bcm-nsp.dtsi b/arch/arm/boot/dts/bcm-nsp.dtsi
index 15f07f9..8b56d74 100644
--- a/arch/arm/boot/dts/bcm-nsp.dtsi
+++ b/arch/arm/boot/dts/bcm-nsp.dtsi
@@ -227,6 +227,15 @@
 			status = "disabled";
 		};
 
+		mailbox: mailbox@...00 {
+			compatible = "brcm,iproc-fa2-mbox";
+			reg = <0x25000 0x445>;
+			interrupts = <GIC_SPI 150 IRQ_TYPE_LEVEL_HIGH>;
+			#mbox-cells = <1>;
+			brcm,rx-status-len = <32>;
+			brcm,use-bcm-hdr;
+		};
+
 		nand: nand@...00 {
 			compatible = "brcm,nand-iproc", "brcm,brcmnand-v6.1";
 			reg = <0x026000 0x600>,
-- 
2.1.0