On Fri, May 08, 2020 at 11:57:01PM +0530, Manivannan Sadhasivam wrote: > Add devicetree YAML binding for Qualcomm Inter-Processor Communication > Controller (IPCC) block. > > Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@xxxxxxxxxx> > --- > .../bindings/mailbox/qcom-ipcc.yaml | 77 +++++++++++++++++++ > include/dt-bindings/mailbox/qcom-ipcc.h | 33 ++++++++ > 2 files changed, 110 insertions(+) > create mode 100644 Documentation/devicetree/bindings/mailbox/qcom-ipcc.yaml > create mode 100644 include/dt-bindings/mailbox/qcom-ipcc.h > > diff --git a/Documentation/devicetree/bindings/mailbox/qcom-ipcc.yaml b/Documentation/devicetree/bindings/mailbox/qcom-ipcc.yaml > new file mode 100644 > index 000000000000..62e7bc8ceb0b > --- /dev/null > +++ b/Documentation/devicetree/bindings/mailbox/qcom-ipcc.yaml > @@ -0,0 +1,77 @@ > +# SPDX-License-Identifier: GPL-2.0 OR BSD-2-Clause > +%YAML 1.2 > +--- > +$id: http://devicetree.org/schemas/mailbox/qcom-ipcc.yaml# > +$schema: http://devicetree.org/meta-schemas/core.yaml# > + > +title: Qualcomm Technologies, Inc. Inter-Processor Communication Controller > + > +maintainers: > + - Manivannan Sadhasivam <manivannan.sadhasivam@xxxxxxxxxx> > + > +description: > + The Inter-Processor Communication Controller (IPCC) is a centralized hardware > + to route interrupts across various subsystems. It involves a three-level > + addressing scheme called protocol, client and signal. For example, consider an > + entity on the Application Processor Subsystem (APSS) that wants to listen to > + Modem's interrupts via Shared Memory Point to Point (SMP2P) interface. In such > + a case, the client would be Modem (client-id is 2) and the signal would be > + SMP2P (signal-id is 2). The SMP2P itself falls under the Multiprocessor (MPROC) > + protocol (protocol-id is 0). Refer include/dt-bindings/mailbox/qcom-ipcc.h > + for the list of such IDs. > + > +properties: > + compatible: > + const: "qcom,ipcc" Need SoC specific compatible(s). No need for quotes. > + > + reg: > + maxItems: 1 > + > + interrupts: > + maxItems: 1 > + > + interrupt-controller: true > + > + "#interrupt-cells": > + const: 3 > + description: > + The first cell is the client-id, the second cell is the signal-id and the > + third cell is the interrupt type. > + > + "#mbox-cells": > + const: 2 > + description: > + The first cell is the client-id, and the second cell is the signal-id. > + > +required: > + - compatible > + - reg > + - interrupts > + - interrupt-controller > + - "#interrupt-cells" > + - "#mbox-cells" > + > +additionalProperties: false > + > +examples: > + - | > + #include <dt-bindings/interrupt-controller/arm-gic.h> > + #include <dt-bindings/mailbox/qcom-ipcc.h> > + > + mailbox: qcom,ipcc@408000 { mailbox@408000 > + compatible = "qcom,ipcc"; > + reg = <0x408000 0x1000>; > + interrupts = <GIC_SPI 229 IRQ_TYPE_LEVEL_HIGH>; > + interrupt-controller; > + #interrupt-cells = <3>; > + #mbox-cells = <2>; > + }; > + > + smp2p-modem { > + compatible = "qcom,smp2p"; > + interrupts-extended = <&ipcc_mproc IPCC_CLIENT_MPSS > + IPCC_MPROC_SIGNAL_SMP2P IRQ_TYPE_EDGE_RISING>; > + mboxes = <&ipcc_mproc IPCC_CLIENT_MPSS IPCC_MPROC_SIGNAL_SMP2P>; > + > + /* Other SMP2P fields */ > + }; > diff --git a/include/dt-bindings/mailbox/qcom-ipcc.h b/include/dt-bindings/mailbox/qcom-ipcc.h > new file mode 100644 > index 000000000000..b8c04f6df57c > --- /dev/null > +++ b/include/dt-bindings/mailbox/qcom-ipcc.h > @@ -0,0 +1,33 @@ > +/* SPDX-License-Identifier: GPL-2.0-only */ Dual license please. I'm pretty sure your employer has an opinion on this. > +/* > + * Copyright (c) 2018-2020, The Linux Foundation. All rights reserved. > + */ > + > +#ifndef __DT_BINDINGS_MAILBOX_IPCC_H > +#define __DT_BINDINGS_MAILBOX_IPCC_H > + > +/* Signal IDs for MPROC protocol */ > +#define IPCC_MPROC_SIGNAL_GLINK_QMP 0 > +#define IPCC_MPROC_SIGNAL_SMP2P 2 > +#define IPCC_MPROC_SIGNAL_PING 3 > + > +/* Client IDs */ > +#define IPCC_CLIENT_AOP 0 > +#define IPCC_CLIENT_TZ 1 > +#define IPCC_CLIENT_MPSS 2 > +#define IPCC_CLIENT_LPASS 3 > +#define IPCC_CLIENT_SLPI 4 > +#define IPCC_CLIENT_SDC 5 > +#define IPCC_CLIENT_CDSP 6 > +#define IPCC_CLIENT_NPU 7 > +#define IPCC_CLIENT_APSS 8 > +#define IPCC_CLIENT_GPU 9 > +#define IPCC_CLIENT_CVP 10 > +#define IPCC_CLIENT_CAM 11 > +#define IPCC_CLIENT_VPU 12 > +#define IPCC_CLIENT_PCIE0 13 > +#define IPCC_CLIENT_PCIE1 14 > +#define IPCC_CLIENT_PCIE2 15 > +#define IPCC_CLIENT_SPSS 16 > + > +#endif > -- > 2.17.1 >
