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[93.34.90.37]) by smtp.googlemail.com with ESMTPSA id 5b1f17b1804b1-47754adcd08sm52511205e9.5.2025.11.04.06.06.45 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 04 Nov 2025 06:06:45 -0800 (PST) From: Christian Marangi To: Ilia Lin , "Rafael J. Wysocki" , Viresh Kumar , linux-pm@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Christian Marangi , Dmitry Baryshkov Subject: [PATCH v3 1/1] cpufreq: qcom-nvmem: add compatible fallback for ipq806x for no SMEM Date: Tue, 4 Nov 2025 15:06:30 +0100 Message-ID: <20251104140635.25965-2-ansuelsmth@gmail.com> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20251104140635.25965-1-ansuelsmth@gmail.com> References: <20251104140635.25965-1-ansuelsmth@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" On some IPQ806x SoC SMEM might be not initialized by SBL. This is the case for some Google devices (the OnHub family) that can't make use of SMEM to detect the SoC ID. To handle these specific case, check if the SMEM is not initialized (by checking if the qcom_smem_get_soc_id returns -ENODEV) and fallback to OF machine compatible checking to identify the SoC variant. Suggested-by: Dmitry Baryshkov Signed-off-by: Christian Marangi Reviewed-by: Konrad Dybcio --- drivers/cpufreq/qcom-cpufreq-nvmem.c | 35 ++++++++++++++++++++++++++-- 1 file changed, 33 insertions(+), 2 deletions(-) diff --git a/drivers/cpufreq/qcom-cpufreq-nvmem.c b/drivers/cpufreq/qcom-cp= ufreq-nvmem.c index 3a8ed723a23e..17c79955ff2f 100644 --- a/drivers/cpufreq/qcom-cpufreq-nvmem.c +++ b/drivers/cpufreq/qcom-cpufreq-nvmem.c @@ -252,13 +252,22 @@ static int qcom_cpufreq_krait_name_version(struct dev= ice *cpu_dev, return ret; } =20 +static const struct of_device_id qcom_cpufreq_ipq806x_match_list[] =3D { + { .compatible =3D "qcom,ipq8062", .data =3D (const void *)QCOM_ID_IPQ8062= }, + { .compatible =3D "qcom,ipq8064", .data =3D (const void *)QCOM_ID_IPQ8064= }, + { .compatible =3D "qcom,ipq8065", .data =3D (const void *)QCOM_ID_IPQ8065= }, + { .compatible =3D "qcom,ipq8066", .data =3D (const void *)QCOM_ID_IPQ8066= }, + { .compatible =3D "qcom,ipq8068", .data =3D (const void *)QCOM_ID_IPQ8068= }, + { .compatible =3D "qcom,ipq8069", .data =3D (const void *)QCOM_ID_IPQ8069= }, +}; + static int qcom_cpufreq_ipq8064_name_version(struct device *cpu_dev, struct nvmem_cell *speedbin_nvmem, char **pvs_name, struct qcom_cpufreq_drv *drv) { + int msm_id =3D -1, ret =3D 0; int speed =3D 0, pvs =3D 0; - int msm_id, ret =3D 0; u8 *speedbin; size_t len; =20 @@ -275,8 +284,30 @@ static int qcom_cpufreq_ipq8064_name_version(struct de= vice *cpu_dev, get_krait_bin_format_a(cpu_dev, &speed, &pvs, speedbin); =20 ret =3D qcom_smem_get_soc_id(&msm_id); - if (ret) + if (ret =3D=3D -ENODEV) { + const struct of_device_id *match; + struct device_node *root; + + root =3D of_find_node_by_path("/"); + if (!root) { + ret =3D -ENODEV; + goto exit; + } + + /* Fallback to compatible match with no SMEM initialized */ + match =3D of_match_node(qcom_cpufreq_ipq806x_match_list, root); + of_node_put(root); + if (!match) { + ret =3D -ENODEV; + goto exit; + } + + /* We found a matching device, get the msm_id from the data entry */ + msm_id =3D (int)match->data; + ret =3D 0; + } else if (ret) { goto exit; + } =20 switch (msm_id) { case QCOM_ID_IPQ8062: --=20 2.51.0