summaryrefslogtreecommitdiff
path: root/drivers/cpufreq/qcom-cpufreq-nvmem.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/cpufreq/qcom-cpufreq-nvmem.c')
-rw-r--r--drivers/cpufreq/qcom-cpufreq-nvmem.c683
1 files changed, 683 insertions, 0 deletions
diff --git a/drivers/cpufreq/qcom-cpufreq-nvmem.c b/drivers/cpufreq/qcom-cpufreq-nvmem.c
new file mode 100644
index 000000000000..81e16b5a0245
--- /dev/null
+++ b/drivers/cpufreq/qcom-cpufreq-nvmem.c
@@ -0,0 +1,683 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2018, The Linux Foundation. All rights reserved.
+ */
+
+/*
+ * In Certain QCOM SoCs like apq8096 and msm8996 that have KRYO processors,
+ * the CPU frequency subset and voltage value of each OPP varies
+ * based on the silicon variant in use. Qualcomm Process Voltage Scaling Tables
+ * defines the voltage and frequency value based on the msm-id in SMEM
+ * and speedbin blown in the efuse combination.
+ * The qcom-cpufreq-nvmem driver reads the msm-id and efuse value from the SoC
+ * to provide the OPP framework with required information.
+ * This is used to determine the voltage and frequency value for each OPP of
+ * operating-points-v2 table when it is parsed by the OPP framework.
+ */
+
+#include <linux/cpu.h>
+#include <linux/err.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/nvmem-consumer.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/pm.h>
+#include <linux/pm_domain.h>
+#include <linux/pm_opp.h>
+#include <linux/pm_runtime.h>
+#include <linux/slab.h>
+#include <linux/soc/qcom/smem.h>
+
+#include <dt-bindings/arm/qcom,ids.h>
+
+enum ipq806x_versions {
+ IPQ8062_VERSION = 0,
+ IPQ8064_VERSION,
+ IPQ8065_VERSION,
+};
+
+#define IPQ6000_VERSION BIT(2)
+
+enum ipq8074_versions {
+ IPQ8074_HAWKEYE_VERSION = 0,
+ IPQ8074_ACORN_VERSION,
+};
+
+struct qcom_cpufreq_drv;
+
+struct qcom_cpufreq_match_data {
+ int (*get_version)(struct device *cpu_dev,
+ struct nvmem_cell *speedbin_nvmem,
+ char **pvs_name,
+ struct qcom_cpufreq_drv *drv);
+ const char **pd_names;
+ unsigned int num_pd_names;
+};
+
+struct qcom_cpufreq_drv_cpu {
+ int opp_token;
+ struct dev_pm_domain_list *pd_list;
+};
+
+struct qcom_cpufreq_drv {
+ u32 versions;
+ const struct qcom_cpufreq_match_data *data;
+ struct qcom_cpufreq_drv_cpu cpus[];
+};
+
+static struct platform_device *cpufreq_dt_pdev, *cpufreq_pdev;
+
+static int qcom_cpufreq_simple_get_version(struct device *cpu_dev,
+ struct nvmem_cell *speedbin_nvmem,
+ char **pvs_name,
+ struct qcom_cpufreq_drv *drv)
+{
+ u8 *speedbin;
+
+ *pvs_name = NULL;
+ speedbin = nvmem_cell_read(speedbin_nvmem, NULL);
+ if (IS_ERR(speedbin))
+ return PTR_ERR(speedbin);
+
+ dev_dbg(cpu_dev, "speedbin: %d\n", *speedbin);
+ drv->versions = 1 << *speedbin;
+ kfree(speedbin);
+ return 0;
+}
+
+static void get_krait_bin_format_a(struct device *cpu_dev,
+ int *speed, int *pvs,
+ u8 *buf)
+{
+ u32 pte_efuse;
+
+ pte_efuse = *((u32 *)buf);
+
+ *speed = pte_efuse & 0xf;
+ if (*speed == 0xf)
+ *speed = (pte_efuse >> 4) & 0xf;
+
+ if (*speed == 0xf) {
+ *speed = 0;
+ dev_warn(cpu_dev, "Speed bin: Defaulting to %d\n", *speed);
+ } else {
+ dev_dbg(cpu_dev, "Speed bin: %d\n", *speed);
+ }
+
+ *pvs = (pte_efuse >> 10) & 0x7;
+ if (*pvs == 0x7)
+ *pvs = (pte_efuse >> 13) & 0x7;
+
+ if (*pvs == 0x7) {
+ *pvs = 0;
+ dev_warn(cpu_dev, "PVS bin: Defaulting to %d\n", *pvs);
+ } else {
+ dev_dbg(cpu_dev, "PVS bin: %d\n", *pvs);
+ }
+}
+
+static void get_krait_bin_format_b(struct device *cpu_dev,
+ int *speed, int *pvs, int *pvs_ver,
+ u8 *buf)
+{
+ u32 pte_efuse, redundant_sel;
+
+ pte_efuse = *((u32 *)buf);
+ redundant_sel = (pte_efuse >> 24) & 0x7;
+
+ *pvs_ver = (pte_efuse >> 4) & 0x3;
+
+ switch (redundant_sel) {
+ case 1:
+ *pvs = ((pte_efuse >> 28) & 0x8) | ((pte_efuse >> 6) & 0x7);
+ *speed = (pte_efuse >> 27) & 0xf;
+ break;
+ case 2:
+ *pvs = (pte_efuse >> 27) & 0xf;
+ *speed = pte_efuse & 0x7;
+ break;
+ default:
+ /* 4 bits of PVS are in efuse register bits 31, 8-6. */
+ *pvs = ((pte_efuse >> 28) & 0x8) | ((pte_efuse >> 6) & 0x7);
+ *speed = pte_efuse & 0x7;
+ }
+
+ /* Check SPEED_BIN_BLOW_STATUS */
+ if (pte_efuse & BIT(3)) {
+ dev_dbg(cpu_dev, "Speed bin: %d\n", *speed);
+ } else {
+ dev_warn(cpu_dev, "Speed bin not set. Defaulting to 0!\n");
+ *speed = 0;
+ }
+
+ /* Check PVS_BLOW_STATUS */
+ pte_efuse = *(((u32 *)buf) + 1);
+ pte_efuse &= BIT(21);
+ if (pte_efuse) {
+ dev_dbg(cpu_dev, "PVS bin: %d\n", *pvs);
+ } else {
+ dev_warn(cpu_dev, "PVS bin not set. Defaulting to 0!\n");
+ *pvs = 0;
+ }
+
+ dev_dbg(cpu_dev, "PVS version: %d\n", *pvs_ver);
+}
+
+static int qcom_cpufreq_kryo_name_version(struct device *cpu_dev,
+ struct nvmem_cell *speedbin_nvmem,
+ char **pvs_name,
+ struct qcom_cpufreq_drv *drv)
+{
+ size_t len;
+ u32 msm_id;
+ u8 *speedbin;
+ int ret;
+ *pvs_name = NULL;
+
+ ret = qcom_smem_get_soc_id(&msm_id);
+ if (ret)
+ return ret;
+
+ speedbin = nvmem_cell_read(speedbin_nvmem, &len);
+ if (IS_ERR(speedbin))
+ return PTR_ERR(speedbin);
+
+ switch (msm_id) {
+ case QCOM_ID_MSM8996:
+ case QCOM_ID_APQ8096:
+ case QCOM_ID_IPQ5332:
+ case QCOM_ID_IPQ5322:
+ case QCOM_ID_IPQ5312:
+ case QCOM_ID_IPQ5302:
+ case QCOM_ID_IPQ5300:
+ case QCOM_ID_IPQ5321:
+ case QCOM_ID_IPQ9514:
+ case QCOM_ID_IPQ9550:
+ case QCOM_ID_IPQ9554:
+ case QCOM_ID_IPQ9570:
+ case QCOM_ID_IPQ9574:
+ drv->versions = 1 << (unsigned int)(*speedbin);
+ break;
+ case QCOM_ID_IPQ5424:
+ case QCOM_ID_IPQ5404:
+ drv->versions = (*speedbin == 0x3b) ? BIT(1) : BIT(0);
+ break;
+ case QCOM_ID_MSM8996SG:
+ case QCOM_ID_APQ8096SG:
+ drv->versions = 1 << ((unsigned int)(*speedbin) + 4);
+ break;
+ default:
+ BUG();
+ break;
+ }
+
+ kfree(speedbin);
+ return 0;
+}
+
+static int qcom_cpufreq_krait_name_version(struct device *cpu_dev,
+ struct nvmem_cell *speedbin_nvmem,
+ char **pvs_name,
+ struct qcom_cpufreq_drv *drv)
+{
+ int speed = 0, pvs = 0, pvs_ver = 0;
+ u8 *speedbin;
+ size_t len;
+ int ret = 0;
+
+ speedbin = nvmem_cell_read(speedbin_nvmem, &len);
+
+ if (IS_ERR(speedbin))
+ return PTR_ERR(speedbin);
+
+ switch (len) {
+ case 4:
+ get_krait_bin_format_a(cpu_dev, &speed, &pvs, speedbin);
+ break;
+ case 8:
+ get_krait_bin_format_b(cpu_dev, &speed, &pvs, &pvs_ver,
+ speedbin);
+ break;
+ default:
+ dev_err(cpu_dev, "Unable to read nvmem data. Defaulting to 0!\n");
+ ret = -ENODEV;
+ goto len_error;
+ }
+
+ snprintf(*pvs_name, sizeof("speedXX-pvsXX-vXX"), "speed%d-pvs%d-v%d",
+ speed, pvs, pvs_ver);
+
+ drv->versions = (1 << speed);
+
+len_error:
+ kfree(speedbin);
+ return ret;
+}
+
+static const struct of_device_id qcom_cpufreq_ipq806x_match_list[] __maybe_unused = {
+ { .compatible = "qcom,ipq8062", .data = (const void *)QCOM_ID_IPQ8062 },
+ { .compatible = "qcom,ipq8064", .data = (const void *)QCOM_ID_IPQ8064 },
+ { .compatible = "qcom,ipq8065", .data = (const void *)QCOM_ID_IPQ8065 },
+ { .compatible = "qcom,ipq8066", .data = (const void *)QCOM_ID_IPQ8066 },
+ { .compatible = "qcom,ipq8068", .data = (const void *)QCOM_ID_IPQ8068 },
+ { .compatible = "qcom,ipq8069", .data = (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 = -1, ret = 0;
+ int speed = 0, pvs = 0;
+ u8 *speedbin;
+ size_t len;
+
+ speedbin = nvmem_cell_read(speedbin_nvmem, &len);
+ if (IS_ERR(speedbin))
+ return PTR_ERR(speedbin);
+
+ if (len != 4) {
+ dev_err(cpu_dev, "Unable to read nvmem data. Defaulting to 0!\n");
+ ret = -ENODEV;
+ goto exit;
+ }
+
+ get_krait_bin_format_a(cpu_dev, &speed, &pvs, speedbin);
+
+ ret = qcom_smem_get_soc_id(&msm_id);
+ if (ret == -ENODEV) {
+ const struct of_device_id *match;
+ struct device_node *root;
+
+ root = of_find_node_by_path("/");
+ if (!root) {
+ ret = -ENODEV;
+ goto exit;
+ }
+
+ /* Fallback to compatible match with no SMEM initialized */
+ match = of_match_node(qcom_cpufreq_ipq806x_match_list, root);
+ of_node_put(root);
+ if (!match) {
+ ret = -ENODEV;
+ goto exit;
+ }
+
+ /* We found a matching device, get the msm_id from the data entry */
+ msm_id = (int)(uintptr_t)match->data;
+ ret = 0;
+ } else if (ret) {
+ goto exit;
+ }
+
+ switch (msm_id) {
+ case QCOM_ID_IPQ8062:
+ drv->versions = BIT(IPQ8062_VERSION);
+ break;
+ case QCOM_ID_IPQ8064:
+ case QCOM_ID_IPQ8066:
+ case QCOM_ID_IPQ8068:
+ drv->versions = BIT(IPQ8064_VERSION);
+ break;
+ case QCOM_ID_IPQ8065:
+ case QCOM_ID_IPQ8069:
+ drv->versions = BIT(IPQ8065_VERSION);
+ break;
+ default:
+ dev_err(cpu_dev,
+ "SoC ID %u is not part of IPQ8064 family, limiting to 1.0GHz!\n",
+ msm_id);
+ drv->versions = BIT(IPQ8062_VERSION);
+ break;
+ }
+
+ /* IPQ8064 speed is never fused. Only pvs values are fused. */
+ snprintf(*pvs_name, sizeof("speed0-pvsXX"), "speed0-pvs%d", pvs);
+
+exit:
+ kfree(speedbin);
+ return ret;
+}
+
+static int qcom_cpufreq_ipq6018_name_version(struct device *cpu_dev,
+ struct nvmem_cell *speedbin_nvmem,
+ char **pvs_name,
+ struct qcom_cpufreq_drv *drv)
+{
+ u32 msm_id;
+ int ret;
+ u8 *speedbin;
+ *pvs_name = NULL;
+
+ ret = qcom_smem_get_soc_id(&msm_id);
+ if (ret)
+ return ret;
+
+ speedbin = nvmem_cell_read(speedbin_nvmem, NULL);
+ if (IS_ERR(speedbin))
+ return PTR_ERR(speedbin);
+
+ switch (msm_id) {
+ case QCOM_ID_IPQ6005:
+ case QCOM_ID_IPQ6010:
+ case QCOM_ID_IPQ6018:
+ case QCOM_ID_IPQ6028:
+ /* Fuse Value Freq BIT to set
+ * ---------------------------------
+ * 2’b0 No Limit BIT(0)
+ * 2’b1 1.5 GHz BIT(1)
+ */
+ drv->versions = 1 << (unsigned int)(*speedbin);
+ break;
+ case QCOM_ID_IPQ6000:
+ /*
+ * IPQ6018 family only has one bit to advertise the CPU
+ * speed-bin, but that is not enough for IPQ6000 which
+ * is only rated up to 1.2GHz.
+ * So for IPQ6000 manually set BIT(2) based on SMEM ID.
+ */
+ drv->versions = IPQ6000_VERSION;
+ break;
+ default:
+ dev_err(cpu_dev,
+ "SoC ID %u is not part of IPQ6018 family, limiting to 1.2GHz!\n",
+ msm_id);
+ drv->versions = IPQ6000_VERSION;
+ break;
+ }
+
+ kfree(speedbin);
+ return 0;
+}
+
+static int qcom_cpufreq_ipq8074_name_version(struct device *cpu_dev,
+ struct nvmem_cell *speedbin_nvmem,
+ char **pvs_name,
+ struct qcom_cpufreq_drv *drv)
+{
+ u32 msm_id;
+ int ret;
+ *pvs_name = NULL;
+
+ ret = qcom_smem_get_soc_id(&msm_id);
+ if (ret)
+ return ret;
+
+ switch (msm_id) {
+ case QCOM_ID_IPQ8070A:
+ case QCOM_ID_IPQ8071A:
+ case QCOM_ID_IPQ8172:
+ case QCOM_ID_IPQ8173:
+ case QCOM_ID_IPQ8174:
+ drv->versions = BIT(IPQ8074_ACORN_VERSION);
+ break;
+ case QCOM_ID_IPQ8072A:
+ case QCOM_ID_IPQ8074A:
+ case QCOM_ID_IPQ8076A:
+ case QCOM_ID_IPQ8078A:
+ drv->versions = BIT(IPQ8074_HAWKEYE_VERSION);
+ break;
+ default:
+ dev_err(cpu_dev,
+ "SoC ID %u is not part of IPQ8074 family, limiting to 1.4GHz!\n",
+ msm_id);
+ drv->versions = BIT(IPQ8074_ACORN_VERSION);
+ break;
+ }
+
+ return 0;
+}
+
+static const struct qcom_cpufreq_match_data match_data_kryo = {
+ .get_version = qcom_cpufreq_kryo_name_version,
+};
+
+static const struct qcom_cpufreq_match_data match_data_krait = {
+ .get_version = qcom_cpufreq_krait_name_version,
+};
+
+static const struct qcom_cpufreq_match_data match_data_msm8909 = {
+ .get_version = qcom_cpufreq_simple_get_version,
+ .pd_names = (const char *[]) { "perf" },
+ .num_pd_names = 1,
+};
+
+static const struct qcom_cpufreq_match_data match_data_qcs404 = {
+ .pd_names = (const char *[]) { "cpr" },
+ .num_pd_names = 1,
+};
+
+static const struct qcom_cpufreq_match_data match_data_ipq6018 = {
+ .get_version = qcom_cpufreq_ipq6018_name_version,
+};
+
+static const struct qcom_cpufreq_match_data match_data_ipq8064 = {
+ .get_version = qcom_cpufreq_ipq8064_name_version,
+};
+
+static const struct qcom_cpufreq_match_data match_data_ipq8074 = {
+ .get_version = qcom_cpufreq_ipq8074_name_version,
+};
+
+static void qcom_cpufreq_suspend_pd_devs(struct qcom_cpufreq_drv *drv, unsigned int cpu)
+{
+ struct dev_pm_domain_list *pd_list = drv->cpus[cpu].pd_list;
+ int i;
+
+ if (!pd_list)
+ return;
+
+ for (i = 0; i < pd_list->num_pds; i++)
+ device_set_awake_path(pd_list->pd_devs[i]);
+}
+
+static int qcom_cpufreq_probe(struct platform_device *pdev)
+{
+ struct qcom_cpufreq_drv *drv;
+ struct nvmem_cell *speedbin_nvmem;
+ struct device *cpu_dev;
+ char pvs_name_buffer[] = "speedXX-pvsXX-vXX";
+ char *pvs_name = pvs_name_buffer;
+ unsigned cpu;
+ const struct of_device_id *match;
+ int ret;
+
+ cpu_dev = get_cpu_device(0);
+ if (!cpu_dev)
+ return -ENODEV;
+
+ struct device_node *np __free(device_node) =
+ dev_pm_opp_of_get_opp_desc_node(cpu_dev);
+ if (!np)
+ return -ENOENT;
+
+ ret = of_device_is_compatible(np, "operating-points-v2-kryo-cpu") ||
+ of_device_is_compatible(np, "operating-points-v2-krait-cpu");
+ if (!ret)
+ return -ENOENT;
+
+ drv = devm_kzalloc(&pdev->dev, struct_size(drv, cpus, num_possible_cpus()),
+ GFP_KERNEL);
+ if (!drv)
+ return -ENOMEM;
+
+ match = pdev->dev.platform_data;
+ drv->data = match->data;
+ if (!drv->data)
+ return -ENODEV;
+
+ if (drv->data->get_version) {
+ speedbin_nvmem = of_nvmem_cell_get(np, NULL);
+ if (IS_ERR(speedbin_nvmem))
+ return dev_err_probe(cpu_dev, PTR_ERR(speedbin_nvmem),
+ "Could not get nvmem cell\n");
+
+ ret = drv->data->get_version(cpu_dev,
+ speedbin_nvmem, &pvs_name, drv);
+ if (ret) {
+ nvmem_cell_put(speedbin_nvmem);
+ return ret;
+ }
+ nvmem_cell_put(speedbin_nvmem);
+ }
+
+ for_each_present_cpu(cpu) {
+ struct dev_pm_opp_config config = {
+ .supported_hw = NULL,
+ };
+
+ cpu_dev = get_cpu_device(cpu);
+ if (NULL == cpu_dev) {
+ ret = -ENODEV;
+ goto free_opp;
+ }
+
+ if (drv->data->get_version) {
+ config.supported_hw = &drv->versions;
+ config.supported_hw_count = 1;
+
+ if (pvs_name)
+ config.prop_name = pvs_name;
+ }
+
+ if (config.supported_hw) {
+ drv->cpus[cpu].opp_token = dev_pm_opp_set_config(cpu_dev, &config);
+ if (drv->cpus[cpu].opp_token < 0) {
+ ret = drv->cpus[cpu].opp_token;
+ dev_err(cpu_dev, "Failed to set OPP config\n");
+ goto free_opp;
+ }
+ }
+
+ if (drv->data->pd_names) {
+ struct dev_pm_domain_attach_data attach_data = {
+ .pd_names = drv->data->pd_names,
+ .num_pd_names = drv->data->num_pd_names,
+ .pd_flags = PD_FLAG_DEV_LINK_ON |
+ PD_FLAG_REQUIRED_OPP,
+ };
+
+ ret = dev_pm_domain_attach_list(cpu_dev, &attach_data,
+ &drv->cpus[cpu].pd_list);
+ if (ret < 0)
+ goto free_opp;
+ }
+ }
+
+ cpufreq_dt_pdev = platform_device_register_simple("cpufreq-dt", -1,
+ NULL, 0);
+ if (!IS_ERR(cpufreq_dt_pdev)) {
+ platform_set_drvdata(pdev, drv);
+ return 0;
+ }
+
+ ret = PTR_ERR(cpufreq_dt_pdev);
+ dev_err(cpu_dev, "Failed to register platform device\n");
+
+free_opp:
+ for_each_present_cpu(cpu) {
+ dev_pm_domain_detach_list(drv->cpus[cpu].pd_list);
+ dev_pm_opp_clear_config(drv->cpus[cpu].opp_token);
+ }
+ return ret;
+}
+
+static void qcom_cpufreq_remove(struct platform_device *pdev)
+{
+ struct qcom_cpufreq_drv *drv = platform_get_drvdata(pdev);
+ unsigned int cpu;
+
+ platform_device_unregister(cpufreq_dt_pdev);
+
+ for_each_present_cpu(cpu) {
+ dev_pm_domain_detach_list(drv->cpus[cpu].pd_list);
+ dev_pm_opp_clear_config(drv->cpus[cpu].opp_token);
+ }
+}
+
+static int qcom_cpufreq_suspend(struct device *dev)
+{
+ struct qcom_cpufreq_drv *drv = dev_get_drvdata(dev);
+ unsigned int cpu;
+
+ for_each_present_cpu(cpu)
+ qcom_cpufreq_suspend_pd_devs(drv, cpu);
+
+ return 0;
+}
+
+static DEFINE_SIMPLE_DEV_PM_OPS(qcom_cpufreq_pm_ops, qcom_cpufreq_suspend, NULL);
+
+static struct platform_driver qcom_cpufreq_driver = {
+ .probe = qcom_cpufreq_probe,
+ .remove = qcom_cpufreq_remove,
+ .driver = {
+ .name = "qcom-cpufreq-nvmem",
+ .pm = pm_sleep_ptr(&qcom_cpufreq_pm_ops),
+ },
+};
+
+static const struct of_device_id qcom_cpufreq_match_list[] __initconst __maybe_unused = {
+ { .compatible = "qcom,apq8096", .data = &match_data_kryo },
+ { .compatible = "qcom,msm8909", .data = &match_data_msm8909 },
+ { .compatible = "qcom,msm8996", .data = &match_data_kryo },
+ { .compatible = "qcom,qcs404", .data = &match_data_qcs404 },
+ { .compatible = "qcom,ipq5332", .data = &match_data_kryo },
+ { .compatible = "qcom,ipq5424", .data = &match_data_kryo },
+ { .compatible = "qcom,ipq6018", .data = &match_data_ipq6018 },
+ { .compatible = "qcom,ipq8064", .data = &match_data_ipq8064 },
+ { .compatible = "qcom,ipq8074", .data = &match_data_ipq8074 },
+ { .compatible = "qcom,apq8064", .data = &match_data_krait },
+ { .compatible = "qcom,ipq9574", .data = &match_data_kryo },
+ { .compatible = "qcom,msm8974", .data = &match_data_krait },
+ { .compatible = "qcom,msm8960", .data = &match_data_krait },
+ {},
+};
+MODULE_DEVICE_TABLE(of, qcom_cpufreq_match_list);
+
+/*
+ * Since the driver depends on smem and nvmem drivers, which may
+ * return EPROBE_DEFER, all the real activity is done in the probe,
+ * which may be defered as well. The init here is only registering
+ * the driver and the platform device.
+ */
+static int __init qcom_cpufreq_init(void)
+{
+ struct device_node *np __free(device_node) = of_find_node_by_path("/");
+ const struct of_device_id *match;
+ int ret;
+
+ if (!np)
+ return -ENODEV;
+
+ match = of_match_node(qcom_cpufreq_match_list, np);
+ if (!match)
+ return -ENODEV;
+
+ ret = platform_driver_register(&qcom_cpufreq_driver);
+ if (unlikely(ret < 0))
+ return ret;
+
+ cpufreq_pdev = platform_device_register_data(NULL, "qcom-cpufreq-nvmem",
+ -1, match, sizeof(*match));
+ ret = PTR_ERR_OR_ZERO(cpufreq_pdev);
+ if (0 == ret)
+ return 0;
+
+ platform_driver_unregister(&qcom_cpufreq_driver);
+ return ret;
+}
+module_init(qcom_cpufreq_init);
+
+static void __exit qcom_cpufreq_exit(void)
+{
+ platform_device_unregister(cpufreq_pdev);
+ platform_driver_unregister(&qcom_cpufreq_driver);
+}
+module_exit(qcom_cpufreq_exit);
+
+MODULE_DESCRIPTION("Qualcomm Technologies, Inc. CPUfreq driver");
+MODULE_LICENSE("GPL v2");
generated by cgit (git 2.34.1) at 2025-12-25 04:53:20 +0000