linux-kernel - Re: [PATCH v5 1/5] dt-bindings: clock: Add SM8550 TCSR CC clocks

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Date:   Tue, 6 Dec 2022 23:42:30 +0200
From:   Abel Vesa <abel.vesa@...aro.org>
To:     Bjorn Andersson <andersson@...nel.org>
Cc:     Andy Gross <agross@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Mike Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        devicetree@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        linux-clk@...r.kernel.org,
        Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Subject: Re: [PATCH v5 1/5] dt-bindings: clock: Add SM8550 TCSR CC clocks

On 22-12-06 12:23:32, Bjorn Andersson wrote:
> On Tue, Dec 06, 2022 at 02:56:31PM +0200, Abel Vesa wrote:
> > Add bindings documentation for clock TCSR driver on SM8550.
> > 
> > Signed-off-by: Abel Vesa <abel.vesa@...aro.org>
> > Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
> > ---
> >  .../bindings/clock/qcom,sm8550-tcsr.yaml      | 53 +++++++++++++++++++
> >  include/dt-bindings/clock/qcom,sm8550-tcsr.h  | 18 +++++++
> >  2 files changed, 71 insertions(+)
> >  create mode 100644 Documentation/devicetree/bindings/clock/qcom,sm8550-tcsr.yaml
> >  create mode 100644 include/dt-bindings/clock/qcom,sm8550-tcsr.h
> > 
> > diff --git a/Documentation/devicetree/bindings/clock/qcom,sm8550-tcsr.yaml b/Documentation/devicetree/bindings/clock/qcom,sm8550-tcsr.yaml
> > new file mode 100644
> > index 000000000000..15176b0457d1
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/clock/qcom,sm8550-tcsr.yaml
> > @@ -0,0 +1,53 @@
> > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> > +%YAML 1.2
> > +---
> > +$id: http://devicetree.org/schemas/clock/qcom,sm8550-tcsr.yaml#
> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > +
> > +title: Qualcomm TCSR Clock Controller on SM8550
> > +
> > +maintainers:
> > +  - Bjorn Andersson <andersson@...nel.org>
> > +
> > +description: |
> > +  Qualcomm TCSR clock control module provides the clocks, resets and
> > +  power domains on SM8550
> > +
> > +  See also:: include/dt-bindings/clock/qcom,sm8550-tcsr.h
> > +
> > +properties:
> > +  compatible:
> > +    const: qcom,sm8550-tcsr
> > +
> > +  clocks:
> > +    items:
> > +      - description: Board XO source
> 
> This sounds like the crystal feeding the PMIC, but the clock here should
> be the signal that arrives at the CXO pin of the SoC.

Oh, I guess this should be:
          - description: TCXO pad clock

Will send a new version.

> 
> Other than that, this looks good now.
> 
> Thanks,
> Bjorn
> 
> > +
> > +  reg:
> > +    maxItems: 1
> > +
> > +  '#clock-cells':
> > +    const: 1
> > +
> > +  '#reset-cells':
> > +    const: 1
> > +
> > +required:
> > +  - compatible
> > +  - clocks
> > +
> > +additionalProperties: false
> > +
> > +examples:
> > +  - |
> > +    #include <dt-bindings/clock/qcom,rpmh.h>
> > +
> > +    clock-controller@...0000 {
> > +      compatible = "qcom,sm8550-tcsr";
> > +      reg = <0x1fc0000 0x30000>;
> > +      clocks = <&rpmhcc RPMH_CXO_PAD_CLK>;
> > +      #clock-cells = <1>;
> > +      #reset-cells = <1>;
> > +    };
> > +
> > +...
> > diff --git a/include/dt-bindings/clock/qcom,sm8550-tcsr.h b/include/dt-bindings/clock/qcom,sm8550-tcsr.h
> > new file mode 100644
> > index 000000000000..091cb76f953a
> > --- /dev/null
> > +++ b/include/dt-bindings/clock/qcom,sm8550-tcsr.h
> > @@ -0,0 +1,18 @@
> > +/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) */
> > +/*
> > + * Copyright (c) 2022, The Linux Foundation. All rights reserved.
> > + * Copyright (c) 2022, Linaro Limited
> > + */
> > +
> > +#ifndef _DT_BINDINGS_CLK_QCOM_TCSR_CC_SM8550_H
> > +#define _DT_BINDINGS_CLK_QCOM_TCSR_CC_SM8550_H
> > +
> > +/* TCSR CC clocks */
> > +#define TCSR_PCIE_0_CLKREF_EN					0
> > +#define TCSR_PCIE_1_CLKREF_EN					1
> > +#define TCSR_UFS_CLKREF_EN					2
> > +#define TCSR_UFS_PAD_CLKREF_EN					3
> > +#define TCSR_USB2_CLKREF_EN					4
> > +#define TCSR_USB3_CLKREF_EN					5
> > +
> > +#endif
> > -- 
> > 2.34.1
> >