linux-kernel - Re: [PATCH 1/2] dt-bindings: clock: Introduce QCOM LPASS clock bindings

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Date:   Tue, 18 Sep 2018 15:55:33 +0530
From:   Taniya Das <tdas@...eaurora.org>
To:     Rob Herring <robh@...nel.org>
Cc:     Stephen Boyd <sboyd@...nel.org>,
        Michael Turquette <mturquette@...libre.com>,
        Andy Gross <andy.gross@...aro.org>,
        David Brown <david.brown@...aro.org>,
        Rajendra Nayak <rnayak@...eaurora.org>,
        linux-arm-msm@...r.kernel.org, linux-soc@...r.kernel.org,
        linux-clk@...r.kernel.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org
Subject: Re: [PATCH 1/2] dt-bindings: clock: Introduce QCOM LPASS clock
 bindings

Hello Rob,

Thanks for the review comments.

On 9/17/2018 8:48 AM, Rob Herring wrote:
> On Tue, Sep 11, 2018 at 10:30:05PM +0530, Taniya Das wrote:
>> Add device tree bindings for Low Power Audio subsystem clock controller for
>> Qualcomm Technology Inc's SDM845 SoCs.
>>
>> Signed-off-by: Taniya Das <tdas@...eaurora.org>
>> ---
>>   .../devicetree/bindings/clock/qcom,gcc.txt         |  2 ++
>>   .../devicetree/bindings/clock/qcom,lpasscc.txt     | 31 ++++++++++++++++++++++
>>   include/dt-bindings/clock/qcom,gcc-sdm845.h        |  2 ++
>>   include/dt-bindings/clock/qcom,lpass-sdm845.h      | 16 +++++++++++
>>   4 files changed, 51 insertions(+)
>>   create mode 100644 Documentation/devicetree/bindings/clock/qcom,lpasscc.txt
>>   create mode 100644 include/dt-bindings/clock/qcom,lpass-sdm845.h
>>
>> diff --git a/Documentation/devicetree/bindings/clock/qcom,gcc.txt b/Documentation/devicetree/bindings/clock/qcom,gcc.txt
>> index 664ea1f..b3ff6e8 100644
>> --- a/Documentation/devicetree/bindings/clock/qcom,gcc.txt
>> +++ b/Documentation/devicetree/bindings/clock/qcom,gcc.txt
>> @@ -32,6 +32,8 @@ be part of GCC and hence the TSENS properties can also be
>>   part of the GCC/clock-controller node.
>>   For more details on the TSENS properties please refer
>>   Documentation/devicetree/bindings/thermal/qcom-tsens.txt
>> +- qcom,lpass-protected : Indicate that the LPASS clock branches within GCC are
>> +			 unusable due to firmware access control restrictions.
>>   
>>   Example:
>>   	clock-controller@...000 {
>> diff --git a/Documentation/devicetree/bindings/clock/qcom,lpasscc.txt b/Documentation/devicetree/bindings/clock/qcom,lpasscc.txt
>> new file mode 100644
>> index 0000000..d312957
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/clock/qcom,lpasscc.txt
>> @@ -0,0 +1,31 @@
>> +Qualcomm LPASS Clock Controller Binding
>> +-----------------------------------------------
>> +
>> +Required properties :
>> +- compatible		: shall contain "qcom,sdm845-lpasscc"
>> +- #clock-cells		: from common clock binding, shall contain 1.
>> +- reg			: shall contain base register address and size,
>> +			  in the order
>> +			Index-0 maps to LPASS_CC register region
>> +			Index-1 maps to LPASS_QDSP6SS register region
>> +
>> +Optional properties :
>> +- reg-names	: register names of LPASS domain
>> +		 "lpass_cc", "lpass_qdsp6ss".
> 
> "cc" and "qdsp6ss" is sufficient.
> 

Sure will update in the next patch series.

>> +
>> +Example:
>> +
>> +The below node has to be defined in the cases where the LPASS peripheral loader
>> +would bring the subsystem out of reset.
>> +
>> +	lpasscc: clock-controller {
> 
> Needs a unit-address.
> 

Yes, my mistake. Missed adding it.

>> +		compatible = "qcom,sdm845-lpasscc";
>> +		reg = <0x17014000 0x1f004>, <0x17300000 0x200>;
>> +		reg-names = "lpass_cc", "lpass_qdsp6ss";
>> +		#clock-cells = <1>;
>> +	};
>> +
>> +	gcc: clock-controller@...000 {
> 
> This needs a reg property.
> 

Sure, will update the same.

>> +		compatible = "qcom,gcc-sdm845";
>> +		qcom,lpass-protected;
>> +	};
> 
>> diff --git a/include/dt-bindings/clock/qcom,gcc-sdm845.h b/include/dt-bindings/clock/qcom,gcc-sdm845.h
>> index b8eae5a..968fa65 100644
>> --- a/include/dt-bindings/clock/qcom,gcc-sdm845.h
>> +++ b/include/dt-bindings/clock/qcom,gcc-sdm845.h
>> @@ -197,6 +197,8 @@
>>   #define GCC_QSPI_CORE_CLK_SRC					187
>>   #define GCC_QSPI_CORE_CLK					188
>>   #define GCC_QSPI_CNOC_PERIPH_AHB_CLK				189
>> +#define GCC_LPASS_Q6_AXI_CLK					190
>> +#define GCC_LPASS_SWAY_CLK					191
>>   
>>   /* GCC Resets */
>>   #define GCC_MMSS_BCR						0
>> diff --git a/include/dt-bindings/clock/qcom,lpass-sdm845.h b/include/dt-bindings/clock/qcom,lpass-sdm845.h
>> new file mode 100644
>> index 0000000..015968e
>> --- /dev/null
>> +++ b/include/dt-bindings/clock/qcom,lpass-sdm845.h
>> @@ -0,0 +1,16 @@
>> +/* SPDX-License-Identifier: GPL-2.0 */
>> +/*
>> + * Copyright (c) 2018, The Linux Foundation. All rights reserved.
>> + */
>> +
>> +#ifndef _DT_BINDINGS_CLK_SDM_LPASS_SDM845_H
>> +#define _DT_BINDINGS_CLK_SDM_LPASS_SDM845_H
>> +
>> +#define LPASS_AUDIO_WRAPPER_AON_CLK			0
>> +#define LPASS_Q6SS_AHBM_AON_CLK				1
>> +#define LPASS_Q6SS_AHBS_AON_CLK				2
>> +#define LPASS_QDSP6SS_XO_CLK				3
>> +#define LPASS_QDSP6SS_SLEEP_CLK				4
>> +#define LPASS_QDSP6SS_CORE_CLK				5
>> +
>> +#endif
>> -- 
>> Qualcomm INDIA, on behalf of Qualcomm Innovation Center, Inc.is a member
>> of the Code Aurora Forum, hosted by the  Linux Foundation.
>>
> 

-- 
QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member
of Code Aurora Forum, hosted by The Linux Foundation.

--