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Introduce qcom,cpufreq-epss-lite to represent this constrained EPSS variant. Signed-off-by: Imran Shaik --- Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.yaml | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.yaml= b/Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.yaml index 98eb36bff1727dfe78e77a7f725d1dcab438c3d0..a04f0556dff88615a5b5ee75900= 8c43342f49e11 100644 --- a/Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.yaml +++ b/Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.yaml @@ -54,6 +54,12 @@ properties: - qcom,sm8650-cpufreq-epss - const: qcom,cpufreq-epss =20 + - description: EPSS lite CPUFREQ HW + items: + - enum: + - qcom,shikra-cpufreq-epss-lite + - const: qcom,cpufreq-epss-lite + reg: minItems: 1 items: @@ -144,6 +150,7 @@ allOf: - qcom,sc8280xp-cpufreq-epss - qcom,sdm670-cpufreq-hw - qcom,sdm845-cpufreq-hw + - qcom,shikra-cpufreq-epss-lite - qcom,sm4450-cpufreq-epss - qcom,sm6115-cpufreq-hw - qcom,sm6350-cpufreq-hw --=20 2.34.1 From nobody Sun Jun 14 07:47:54 2026 Received: from mx0a-0031df01.pphosted.com (mx0a-0031df01.pphosted.com [205.220.168.131]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5EA833630A9 for ; 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Fri, 01 May 2026 00:16:05 -0700 (PDT) Received: from hu-imrashai-hyd.qualcomm.com ([202.46.22.19]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-364ec00b094sm1424265a91.9.2026.05.01.00.16.00 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 01 May 2026 00:16:04 -0700 (PDT) From: Imran Shaik Date: Fri, 01 May 2026 12:45:45 +0530 Subject: [PATCH 2/2] cpufreq: qcom: Add cpufreq scaling support for Qualcomm Shikra SoC Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20260501-shikra-cpufreq-scaling-v1-2-c78b95f53b91@oss.qualcomm.com> References: <20260501-shikra-cpufreq-scaling-v1-0-c78b95f53b91@oss.qualcomm.com> In-Reply-To: <20260501-shikra-cpufreq-scaling-v1-0-c78b95f53b91@oss.qualcomm.com> To: "Rafael J. Wysocki" , Viresh Kumar , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Manivannan Sadhasivam Cc: Ajit Pandey , Taniya Das , Jagadeesh Kona , linux-pm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, Imran Shaik X-Mailer: b4 0.14.2 X-Proofpoint-GUID: ZXmhQlchLKmMSlpKYRiwR5uVMhuqjd-R X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNTAxMDA2NyBTYWx0ZWRfX41+OehcenrrK BwpmkVV7nd03Q+QeqDGxJednmLT9gUywcDH9F6iaq0+tylzqdEAc7pCh06Vvn4A2ZImtJ3x4qRX a/10ZjecOghLS4cUVrM0FIWcs/6Ffx5AOw8yFAO0zP4hiTsPc7uLYB7L8/M+iNBsypmfGNeWA6w F3xVx3mce2FVLAvJCmJ+0KW5wfNf64TYmmQLGsmSfjgCDdob90HgzRWTDrB2UYdOCDURPEzGbXH oG5rxhg/+KG0KeX75AUV+83NNsPKOy2Ab1rQlkxUqZ9S1HRUMZwXC84OgyUDXvPCU4Tg45T14FN RNvWqTuz46y+vCfadPRH2Na7IRzF0YX3YFfffZVLBHki367hjILZ7D949apcppnJsPZ2G5TgQ5w BiB2mqWpT95IihuqzJDKlDB3MHwJTPxqaEdS1L4wwgYtpt55OfPTFBJ+TFJnUar9ob+FszdeM5m gzJvU2kHHONOWz1KkaA== X-Authority-Analysis: v=2.4 cv=UcxhjqSN c=1 sm=1 tr=0 ts=69f45336 cx=c_pps a=0uOsjrqzRL749jD1oC5vDA==:117 a=fChuTYTh2wq5r3m49p7fHw==:17 a=IkcTkHD0fZMA:10 a=NGcC8JguVDcA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=DJpcGTmdVt4CTyJn9g5Z:22 a=EUspDBNiAAAA:8 a=ho_ns56EN5Ux2FGuUoIA:9 a=QEXdDO2ut3YA:10 a=mQ_c8vxmzFEMiUWkPHU9:22 X-Proofpoint-ORIG-GUID: ZXmhQlchLKmMSlpKYRiwR5uVMhuqjd-R X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-05-01_01,2026-04-30_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 bulkscore=0 clxscore=1015 lowpriorityscore=0 malwarescore=0 impostorscore=0 adultscore=0 spamscore=0 phishscore=0 priorityscore=1501 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2604200000 definitions=main-2605010067 From: Taniya Das The Qualcomm Shikra cpufreq hardware is functionally identical to EPSS, but supports only up to 12 frequency lookup table (LUT) entries. Hence, add epss_lite_soc_data that reuses EPSS configuration with the appropriate LUT entries limit. Signed-off-by: Taniya Das Signed-off-by: Imran Shaik Reviewed-by: Konrad Dybcio --- drivers/cpufreq/qcom-cpufreq-hw.c | 23 ++++++++++++++++++++--- 1 file changed, 20 insertions(+), 3 deletions(-) diff --git a/drivers/cpufreq/qcom-cpufreq-hw.c b/drivers/cpufreq/qcom-cpufr= eq-hw.c index ea9a20d27b8fdceb9341ee53e5fa27b7a6d92483..92e1256c6457046927625136077= c69f8d56644aa 100644 --- a/drivers/cpufreq/qcom-cpufreq-hw.c +++ b/drivers/cpufreq/qcom-cpufreq-hw.c @@ -1,6 +1,7 @@ // SPDX-License-Identifier: GPL-2.0 /* * Copyright (c) 2018, The Linux Foundation. All rights reserved. + * Copyright (c) Qualcomm Technologies, Inc. and/or its subsidiaries. */ =20 #include @@ -40,6 +41,7 @@ struct qcom_cpufreq_soc_data { u32 reg_intr_clr; u32 reg_current_vote; u32 reg_perf_state; + u32 lut_max_entries; u8 lut_row_size; }; =20 @@ -156,7 +158,7 @@ static unsigned int qcom_cpufreq_get_freq(struct cpufre= q_policy *policy) soc_data =3D qcom_cpufreq.soc_data; =20 index =3D readl_relaxed(data->base + soc_data->reg_perf_state); - index =3D min(index, LUT_MAX_ENTRIES - 1); + index =3D min(index, soc_data->lut_max_entries - 1); =20 return policy->freq_table[index].frequency; } @@ -211,7 +213,7 @@ static int qcom_cpufreq_hw_read_lut(struct device *cpu_= dev, struct qcom_cpufreq_data *drv_data =3D policy->driver_data; const struct qcom_cpufreq_soc_data *soc_data =3D qcom_cpufreq.soc_data; =20 - table =3D kzalloc_objs(*table, LUT_MAX_ENTRIES + 1); + table =3D kzalloc_objs(*table, soc_data->lut_max_entries + 1); if (!table) return -ENOMEM; =20 @@ -236,7 +238,7 @@ static int qcom_cpufreq_hw_read_lut(struct device *cpu_= dev, icc_scaling_enabled =3D false; } =20 - for (i =3D 0; i < LUT_MAX_ENTRIES; i++) { + for (i =3D 0; i < soc_data->lut_max_entries; i++) { data =3D readl_relaxed(drv_data->base + soc_data->reg_freq_lut + i * soc_data->lut_row_size); src =3D FIELD_GET(LUT_SRC, data); @@ -405,6 +407,7 @@ static const struct qcom_cpufreq_soc_data qcom_soc_data= =3D { .reg_current_vote =3D 0x704, .reg_perf_state =3D 0x920, .lut_row_size =3D 32, + .lut_max_entries =3D LUT_MAX_ENTRIES, }; =20 static const struct qcom_cpufreq_soc_data epss_soc_data =3D { @@ -416,11 +419,25 @@ static const struct qcom_cpufreq_soc_data epss_soc_da= ta =3D { .reg_intr_clr =3D 0x308, .reg_perf_state =3D 0x320, .lut_row_size =3D 4, + .lut_max_entries =3D LUT_MAX_ENTRIES, +}; + +static const struct qcom_cpufreq_soc_data epss_lite_soc_data =3D { + .reg_enable =3D 0x0, + .reg_domain_state =3D 0x20, + .reg_dcvs_ctrl =3D 0xb0, + .reg_freq_lut =3D 0x100, + .reg_volt_lut =3D 0x200, + .reg_intr_clr =3D 0x308, + .reg_perf_state =3D 0x320, + .lut_row_size =3D 4, + .lut_max_entries =3D 12, }; =20 static const struct of_device_id qcom_cpufreq_hw_match[] =3D { { .compatible =3D "qcom,cpufreq-hw", .data =3D &qcom_soc_data }, { .compatible =3D "qcom,cpufreq-epss", .data =3D &epss_soc_data }, + { .compatible =3D "qcom,cpufreq-epss-lite", .data =3D &epss_lite_soc_data= }, {} }; MODULE_DEVICE_TABLE(of, qcom_cpufreq_hw_match); --=20 2.34.1