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SubjectRe: [PATCH v4 2/3] dt-bindings: remoteproc: qcom: Convert SC7280 MSS bindings to YAML
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Hey Stephen,

On 5/20/22 4:05 AM, Stephen Boyd wrote:
> Quoting Sibi Sankar (2022-05-19 09:47:04)
>> diff --git a/Documentation/devicetree/bindings/remoteproc/qcom,sc7280-mss-pil.yaml b/Documentation/devicetree/bindings/remoteproc/qcom,sc7280-mss-pil.yaml
>> new file mode 100644
>> index 000000000000..a936d84eefa6
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/remoteproc/qcom,sc7280-mss-pil.yaml
>> @@ -0,0 +1,250 @@
>> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
>> +%YAML 1.2
>> +---
>> +$id: http://devicetree.org/schemas/remoteproc/qcom,sc7280-mss-pil.yaml#
>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>> +
>> +title: Qualcomm SC7280 MSS Peripheral Image Loader
>> +
>> +maintainers:
>> + - Sibi Sankar <quic_sibis@quicinc.com>
>> +
>> +description:
>> + This document describes the hardware for a component that loads and boots firmware
>> + on the Qualcomm Technology Inc. SC7280 Modem Hexagon Core.
>> +
>> +properties:
>> + compatible:
>> + enum:
>> + - qcom,sc7280-mss-pil
>> +
> [..]
>> +
>> + resets:
>> + items:
>> + - description: AOSS restart
>> + - description: PDC reset
>> +
>> + reset-names:
>> + items:
>> + - const: mss_restart
>> + - const: pdc_reset
>> +
>> + memory-region:
>> + maxItems: 2
>> + description: Phandle reference to the reserved-memory for the MBA region followed
>> + by the modem region.
>> +
>> + firmware-name:
>> + $ref: /schemas/types.yaml#/definitions/string-array
>> + maxItems: 2
>
> Instead of maxItems can this be
>
> items:
> - description: Name of MBA firmware
> - description: Name of modem firmware
>
> so that we know the order? Same for 'memory-region' above.

ack

>
>> + description:
>> + The name of the MBA and modem firmware to be loaded for this remote processor.
>> +
>> + qcom,halt-regs:
>> + $ref: /schemas/types.yaml#/definitions/phandle-array
>
> Should this have maxItems: 1? Or that's implicit from description?

It's implicit!

>
>> + description:
>> + Phandle reference to a syscon representing TCSR followed by the
>> + four offsets within syscon for q6, modem, nc and vq6 halt registers.
>> +
>> + qcom,ext-regs:
>> + $ref: /schemas/types.yaml#/definitions/phandle-array
>
> Should this have min/maxItems: 2?

ack

>
>> + description:
>> + Two phandle references to syscons representing TCSR_REG and TCSR register
>> + space followed by the two offsets within the syscon to force_clk_en/rscc_disable
>> + and axim1_clk_off/crypto_clk_off registers respectively.
>> +
>> + qcom,qaccept-regs:
>> + $ref: /schemas/types.yaml#/definitions/phandle-array
>> + description:
>> + Phandle reference to a syscon representing TCSR followed by the
>> + three offsets within syscon for mdm, cx and axi qaccept registers.
>> +
>> + qcom,qmp:
>> + $ref: /schemas/types.yaml#/definitions/phandle
>> + description: Reference to the AOSS side-channel message RAM.
>> +
>> + qcom,smem-states:
>> + $ref: /schemas/types.yaml#/definitions/phandle-array
>> + description: States used by the AP to signal the Hexagon core
>> + items:
>> + - description: Stop the modem
>
> This one did items for a phandle array so I think we should follow the
> same above.

ack

>
>> +
>> + qcom,smem-state-names:
>> + description: The names of the state bits used for SMP2P output
>> + const: stop
>> +
>> + glink-edge:
>> + $ref: qcom,glink-edge.yaml#
>> + description:
>> + Qualcomm G-Link subnode which represents communication edge, channels
>> + and devices related to the DSP.
> [..]
>> + power-domain-names = "cx", "mss";
>> +
>> + memory-region = <&mba_mem>, <&mpss_mem>;
>> +
>> + qcom,qmp = <&aoss_qmp>;
>> +
>> + qcom,smem-states = <&modem_smp2p_out 0>;
>> + qcom,smem-state-names = "stop";
>> +
>> + resets = <&aoss_reset AOSS_CC_MSS_RESTART>,
>> + <&pdc_reset PDC_MODEM_SYNC_RESET>;
>> + reset-names = "mss_restart", "pdc_reset";
>> +
>> + qcom,halt-regs = <&tcsr_mutex 0x23000 0x25000 0x28000 0x33000>;
>> + qcom,ext-regs = <&tcsr 0x10000 0x10004 &tcsr_mutex 0x26004 0x26008>;
>
> Because it's two items I'd expect:
>
> <&tcsr 0x10000 0x10004>, <&tcsr_mutex 0x26004 0x26008>;

I guess both the ways work since the driver uses
of_parse_phandle_with_fixed_args.

>
>> + qcom,qaccept-regs = <&tcsr_mutex 0x23030 0x23040 0x23020>;
>> +
>> + glink-edge {
>> + interrupts-extended = <&ipcc IPCC_CLIENT_MPSS
>> + IPCC_MPROC_SIGNAL_GLINK_QMP
>> + IRQ_TYPE_EDGE_RISING>;

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