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

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Message-ID: <793d5039-0506-4104-b4ce-64bfa3cc00eb@oss.qualcomm.com>
Date: Mon, 17 Nov 2025 13:33:53 +0530
From: Taniya Das <taniya.das@....qualcomm.com>
To: Barnabás Czémán <barnabas.czeman@...nlining.org>,
        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 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?

>  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,
>  };

-- 
Thanks,
Taniya Das