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[78.88.45.245]) by smtp.gmail.com with ESMTPSA id 4fb4d7f45d1cf-6433a3d8294sm10047574a12.3.2025.11.17.04.17.49 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 17 Nov 2025 04:17:51 -0800 (PST) Message-ID: <8faa0c8e-6f21-4025-bbdf-d4ec18eb7628@oss.qualcomm.com> Date: Mon, 17 Nov 2025 13:17:48 +0100 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 2/4] clk: qcom: gcc: Add support for Global Clock controller found on MSM8940 To: =?UTF-8?B?QmFybmFiw6FzIEN6w6ltw6Fu?= , Taniya Das , Bjorn Andersson , Michael Turquette , Stephen Boyd , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Adam Skladowski , Sireesh Kodali Cc: linux-arm-msm@vger.kernel.org, linux-clk@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Lanik References: <20251116-gcc-msm8940-sdm439-v1-0-7c0dc89c922c@mainlining.org> <20251116-gcc-msm8940-sdm439-v1-2-7c0dc89c922c@mainlining.org> <793d5039-0506-4104-b4ce-64bfa3cc00eb@oss.qualcomm.com> <5C7A10CF-910E-448A-8BFD-F2A46782D3B9@mainlining.org> Content-Language: en-US From: Konrad Dybcio In-Reply-To: <5C7A10CF-910E-448A-8BFD-F2A46782D3B9@mainlining.org> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Proofpoint-GUID: uza--jzRL4eLUnEOlclBmwuz4CT97cMZ X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUxMTE3MDEwNCBTYWx0ZWRfX/KkLAPtgRgqh XzQn3Zlc8zIUyJh+BTbS/yFZvmVkPoDUGeZcs6ut8GAeyNoTBbwYlnkruB5BdVAXtcVK3GoA8n3 d2M5d69uhhDACa8bBUIxRhaNict1xUt5ypOifkWXztROpDmy+YCzKtZMUDY/imYM9h7A56r8kmy ZEtRQV+iHZurKGpUrqkMbpGmUTaPXYRaUCEL66zb++4oA9nkwJOx/aHkImeVsklXOnjs5GcAtmO EgNE7ZG3ojKjV2Si6jGNfWYzigjbfXxn3AK0lUt/yfSBDF6HOFJ93uflgn+kJLtpAohucYT1oOB Md0Hd+7p+lbqDdm4fz5e7vo4kP0oW7icFzDCZoeY25f2hqQGSOEA5qchGqlermaH3XDbMuGF88j F/porTNAnciuE3IwzZks+UbXCmRPBA== X-Authority-Analysis: v=2.4 cv=Cryys34D c=1 sm=1 tr=0 ts=691b1271 cx=c_pps a=oc9J++0uMp73DTRD5QyR2A==:117 a=FpWmc02/iXfjRdCD7H54yg==:17 a=IkcTkHD0fZMA:10 a=6UeiqGixMTsA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=EUspDBNiAAAA:8 a=nxAZbQHxNLXoYmXW_74A:9 a=3ZKOabzyN94A:10 a=QEXdDO2ut3YA:10 a=iYH6xdkBrDN1Jqds4HTS:22 X-Proofpoint-ORIG-GUID: uza--jzRL4eLUnEOlclBmwuz4CT97cMZ X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.9,FMLib:17.12.100.49 definitions=2025-11-17_03,2025-11-13_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 spamscore=0 clxscore=1015 suspectscore=0 priorityscore=1501 malwarescore=0 bulkscore=0 adultscore=0 phishscore=0 impostorscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2510240001 definitions=main-2511170104 On 11/17/25 9:51 AM, Barnabás Czémán wrote: > > > On 17 November 2025 09:03:53 CET, Taniya Das 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. On msm8939, the clock needed to be turned on for the GPU SMMU See 5bc1cf1466f6 ("iommu/qcom: add optional 'tbu' clock for TLB invalidate") Konrad