linux-kernel - Re: [PATCH 2/4] clk: qcom: gcc: Add support for Global Clock controller found on MSM8940

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Message-ID: <5C7A10CF-910E-448A-8BFD-F2A46782D3B9@mainlining.org>
Date: Mon, 17 Nov 2025 09:51:04 +0100
From: Barnabás Czémán <barnabas.czeman@...nlining.org>
To: Taniya Das <taniya.das@....qualcomm.com>,
 Bjorn Andersson <andersson@...nel.org>,
 Michael Turquette <mturquette@...libre.com>, Stephen Boyd <sboyd@...nel.org>,
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
 Conor Dooley <conor+dt@...nel.org>, Adam Skladowski <a_skl39@...tonmail.com>,
 Sireesh Kodali <sireeshkodali@...tonmail.com>
CC: linux-arm-msm@...r.kernel.org, linux-clk@...r.kernel.org,
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
 Lanik <daniilt971@...il.com>
Subject: Re: [PATCH 2/4] clk: qcom: gcc: Add support for Global Clock controller found on MSM8940



On 17 November 2025 09:03:53 CET, Taniya Das <taniya.das@....qualcomm.com> wrote:
>
>
>On 11/17/2025 3:05 AM, Barnabás Czémán wrote:
>>  
>> +static struct clk_branch gcc_ipa_tbu_clk = {
>> +	.halt_reg = 0x120a0,
>> +	.halt_check = BRANCH_VOTED,
>> +	.clkr = {
>> +		.enable_reg = 0x4500c,
>> +		.enable_mask = BIT(16),
>> +		.hw.init = &(struct clk_init_data){
>> +			.name = "gcc_ipa_tbu_clk",
>> +			.ops = &clk_branch2_ops,
>> +		},
>> +	},
>> +};
>> +
>
>Is the TBU clock used on 8940 by a SMMU driver?
As far as I know no MSM8940 is using same smmu driver and bindings like MSM8937.
>
>>  static struct gdsc venus_gdsc = {
>>  	.gdscr = 0x4c018,
>>  	.cxcs = (unsigned int []){ 0x4c024, 0x4c01c },
>> @@ -3764,6 +3798,189 @@ static struct clk_regmap *gcc_msm8937_clocks[] = {
>>  	[GCC_VFE_TBU_CLK] = &gcc_vfe_tbu_clk.clkr,
>>  };
>