| // SPDX-License-Identifier: GPL-2.0 |
| /* |
| * Copyright (c) 2017, Linaro Ltd. |
| */ |
| #include <linux/firmware.h> |
| #include <linux/module.h> |
| #include <linux/notifier.h> |
| #include <linux/slab.h> |
| #include <linux/interrupt.h> |
| #include <linux/io.h> |
| #include <linux/of_irq.h> |
| #include <linux/of_platform.h> |
| #include <linux/platform_device.h> |
| #include <linux/remoteproc/qcom_rproc.h> |
| #include <linux/rpmsg.h> |
| |
| #include "qcom_common.h" |
| |
| static BLOCKING_NOTIFIER_HEAD(sysmon_notifiers); |
| |
| struct qcom_sysmon { |
| struct rproc_subdev subdev; |
| struct rproc *rproc; |
| |
| struct list_head node; |
| |
| const char *name; |
| |
| int shutdown_irq; |
| int ssctl_version; |
| int ssctl_instance; |
| |
| struct notifier_block nb; |
| |
| struct device *dev; |
| |
| struct rpmsg_endpoint *ept; |
| struct completion comp; |
| struct completion ind_comp; |
| struct completion shutdown_comp; |
| struct mutex lock; |
| |
| bool ssr_ack; |
| |
| struct qmi_handle qmi; |
| struct sockaddr_qrtr ssctl; |
| }; |
| |
| enum { |
| SSCTL_SSR_EVENT_BEFORE_POWERUP, |
| SSCTL_SSR_EVENT_AFTER_POWERUP, |
| SSCTL_SSR_EVENT_BEFORE_SHUTDOWN, |
| SSCTL_SSR_EVENT_AFTER_SHUTDOWN, |
| }; |
| |
| static const char * const sysmon_state_string[] = { |
| [SSCTL_SSR_EVENT_BEFORE_POWERUP] = "before_powerup", |
| [SSCTL_SSR_EVENT_AFTER_POWERUP] = "after_powerup", |
| [SSCTL_SSR_EVENT_BEFORE_SHUTDOWN] = "before_shutdown", |
| [SSCTL_SSR_EVENT_AFTER_SHUTDOWN] = "after_shutdown", |
| }; |
| |
| struct sysmon_event { |
| const char *subsys_name; |
| u32 ssr_event; |
| }; |
| |
| static DEFINE_MUTEX(sysmon_lock); |
| static LIST_HEAD(sysmon_list); |
| |
| /** |
| * sysmon_send_event() - send notification of other remote's SSR event |
| * @sysmon: sysmon context |
| * @name: other remote's name |
| */ |
| static void sysmon_send_event(struct qcom_sysmon *sysmon, |
| const struct sysmon_event *event) |
| { |
| char req[50]; |
| int len; |
| int ret; |
| |
| len = snprintf(req, sizeof(req), "ssr:%s:%s", event->subsys_name, |
| sysmon_state_string[event->ssr_event]); |
| if (len >= sizeof(req)) |
| return; |
| |
| mutex_lock(&sysmon->lock); |
| reinit_completion(&sysmon->comp); |
| sysmon->ssr_ack = false; |
| |
| ret = rpmsg_send(sysmon->ept, req, len); |
| if (ret < 0) { |
| dev_err(sysmon->dev, "failed to send sysmon event\n"); |
| goto out_unlock; |
| } |
| |
| ret = wait_for_completion_timeout(&sysmon->comp, |
| msecs_to_jiffies(5000)); |
| if (!ret) { |
| dev_err(sysmon->dev, "timeout waiting for sysmon ack\n"); |
| goto out_unlock; |
| } |
| |
| if (!sysmon->ssr_ack) |
| dev_err(sysmon->dev, "unexpected response to sysmon event\n"); |
| |
| out_unlock: |
| mutex_unlock(&sysmon->lock); |
| } |
| |
| /** |
| * sysmon_request_shutdown() - request graceful shutdown of remote |
| * @sysmon: sysmon context |
| */ |
| static void sysmon_request_shutdown(struct qcom_sysmon *sysmon) |
| { |
| char *req = "ssr:shutdown"; |
| int ret; |
| |
| mutex_lock(&sysmon->lock); |
| reinit_completion(&sysmon->comp); |
| sysmon->ssr_ack = false; |
| |
| ret = rpmsg_send(sysmon->ept, req, strlen(req) + 1); |
| if (ret < 0) { |
| dev_err(sysmon->dev, "send sysmon shutdown request failed\n"); |
| goto out_unlock; |
| } |
| |
| ret = wait_for_completion_timeout(&sysmon->comp, |
| msecs_to_jiffies(5000)); |
| if (!ret) { |
| dev_err(sysmon->dev, "timeout waiting for sysmon ack\n"); |
| goto out_unlock; |
| } |
| |
| if (!sysmon->ssr_ack) |
| dev_err(sysmon->dev, |
| "unexpected response to sysmon shutdown request\n"); |
| |
| out_unlock: |
| mutex_unlock(&sysmon->lock); |
| } |
| |
| static int sysmon_callback(struct rpmsg_device *rpdev, void *data, int count, |
| void *priv, u32 addr) |
| { |
| struct qcom_sysmon *sysmon = priv; |
| const char *ssr_ack = "ssr:ack"; |
| const int ssr_ack_len = strlen(ssr_ack) + 1; |
| |
| if (!sysmon) |
| return -EINVAL; |
| |
| if (count >= ssr_ack_len && !memcmp(data, ssr_ack, ssr_ack_len)) |
| sysmon->ssr_ack = true; |
| |
| complete(&sysmon->comp); |
| |
| return 0; |
| } |
| |
| #define SSCTL_SHUTDOWN_REQ 0x21 |
| #define SSCTL_SHUTDOWN_READY_IND 0x21 |
| #define SSCTL_SUBSYS_EVENT_REQ 0x23 |
| |
| #define SSCTL_MAX_MSG_LEN 7 |
| |
| #define SSCTL_SUBSYS_NAME_LENGTH 15 |
| |
| enum { |
| SSCTL_SSR_EVENT_FORCED, |
| SSCTL_SSR_EVENT_GRACEFUL, |
| }; |
| |
| struct ssctl_shutdown_resp { |
| struct qmi_response_type_v01 resp; |
| }; |
| |
| static struct qmi_elem_info ssctl_shutdown_resp_ei[] = { |
| { |
| .data_type = QMI_STRUCT, |
| .elem_len = 1, |
| .elem_size = sizeof(struct qmi_response_type_v01), |
| .array_type = NO_ARRAY, |
| .tlv_type = 0x02, |
| .offset = offsetof(struct ssctl_shutdown_resp, resp), |
| .ei_array = qmi_response_type_v01_ei, |
| }, |
| {} |
| }; |
| |
| struct ssctl_subsys_event_req { |
| u8 subsys_name_len; |
| char subsys_name[SSCTL_SUBSYS_NAME_LENGTH]; |
| u32 event; |
| u8 evt_driven_valid; |
| u32 evt_driven; |
| }; |
| |
| static struct qmi_elem_info ssctl_subsys_event_req_ei[] = { |
| { |
| .data_type = QMI_DATA_LEN, |
| .elem_len = 1, |
| .elem_size = sizeof(uint8_t), |
| .array_type = NO_ARRAY, |
| .tlv_type = 0x01, |
| .offset = offsetof(struct ssctl_subsys_event_req, |
| subsys_name_len), |
| .ei_array = NULL, |
| }, |
| { |
| .data_type = QMI_UNSIGNED_1_BYTE, |
| .elem_len = SSCTL_SUBSYS_NAME_LENGTH, |
| .elem_size = sizeof(char), |
| .array_type = VAR_LEN_ARRAY, |
| .tlv_type = 0x01, |
| .offset = offsetof(struct ssctl_subsys_event_req, |
| subsys_name), |
| .ei_array = NULL, |
| }, |
| { |
| .data_type = QMI_SIGNED_4_BYTE_ENUM, |
| .elem_len = 1, |
| .elem_size = sizeof(uint32_t), |
| .array_type = NO_ARRAY, |
| .tlv_type = 0x02, |
| .offset = offsetof(struct ssctl_subsys_event_req, |
| event), |
| .ei_array = NULL, |
| }, |
| { |
| .data_type = QMI_OPT_FLAG, |
| .elem_len = 1, |
| .elem_size = sizeof(uint8_t), |
| .array_type = NO_ARRAY, |
| .tlv_type = 0x10, |
| .offset = offsetof(struct ssctl_subsys_event_req, |
| evt_driven_valid), |
| .ei_array = NULL, |
| }, |
| { |
| .data_type = QMI_SIGNED_4_BYTE_ENUM, |
| .elem_len = 1, |
| .elem_size = sizeof(uint32_t), |
| .array_type = NO_ARRAY, |
| .tlv_type = 0x10, |
| .offset = offsetof(struct ssctl_subsys_event_req, |
| evt_driven), |
| .ei_array = NULL, |
| }, |
| {} |
| }; |
| |
| struct ssctl_subsys_event_resp { |
| struct qmi_response_type_v01 resp; |
| }; |
| |
| static struct qmi_elem_info ssctl_subsys_event_resp_ei[] = { |
| { |
| .data_type = QMI_STRUCT, |
| .elem_len = 1, |
| .elem_size = sizeof(struct qmi_response_type_v01), |
| .array_type = NO_ARRAY, |
| .tlv_type = 0x02, |
| .offset = offsetof(struct ssctl_subsys_event_resp, |
| resp), |
| .ei_array = qmi_response_type_v01_ei, |
| }, |
| {} |
| }; |
| |
| static struct qmi_elem_info ssctl_shutdown_ind_ei[] = { |
| {} |
| }; |
| |
| static void sysmon_ind_cb(struct qmi_handle *qmi, struct sockaddr_qrtr *sq, |
| struct qmi_txn *txn, const void *data) |
| { |
| struct qcom_sysmon *sysmon = container_of(qmi, struct qcom_sysmon, qmi); |
| |
| complete(&sysmon->ind_comp); |
| } |
| |
| static struct qmi_msg_handler qmi_indication_handler[] = { |
| { |
| .type = QMI_INDICATION, |
| .msg_id = SSCTL_SHUTDOWN_READY_IND, |
| .ei = ssctl_shutdown_ind_ei, |
| .decoded_size = 0, |
| .fn = sysmon_ind_cb |
| }, |
| {} |
| }; |
| |
| /** |
| * ssctl_request_shutdown() - request shutdown via SSCTL QMI service |
| * @sysmon: sysmon context |
| */ |
| static void ssctl_request_shutdown(struct qcom_sysmon *sysmon) |
| { |
| struct ssctl_shutdown_resp resp; |
| struct qmi_txn txn; |
| int ret; |
| |
| reinit_completion(&sysmon->ind_comp); |
| reinit_completion(&sysmon->shutdown_comp); |
| ret = qmi_txn_init(&sysmon->qmi, &txn, ssctl_shutdown_resp_ei, &resp); |
| if (ret < 0) { |
| dev_err(sysmon->dev, "failed to allocate QMI txn\n"); |
| return; |
| } |
| |
| ret = qmi_send_request(&sysmon->qmi, &sysmon->ssctl, &txn, |
| SSCTL_SHUTDOWN_REQ, 0, NULL, NULL); |
| if (ret < 0) { |
| dev_err(sysmon->dev, "failed to send shutdown request\n"); |
| qmi_txn_cancel(&txn); |
| return; |
| } |
| |
| ret = qmi_txn_wait(&txn, 5 * HZ); |
| if (ret < 0) |
| dev_err(sysmon->dev, "failed receiving QMI response\n"); |
| else if (resp.resp.result) |
| dev_err(sysmon->dev, "shutdown request failed\n"); |
| else |
| dev_dbg(sysmon->dev, "shutdown request completed\n"); |
| |
| if (sysmon->shutdown_irq > 0) { |
| ret = wait_for_completion_timeout(&sysmon->shutdown_comp, |
| 10 * HZ); |
| if (!ret) { |
| ret = try_wait_for_completion(&sysmon->ind_comp); |
| if (!ret) |
| dev_err(sysmon->dev, |
| "timeout waiting for shutdown ack\n"); |
| } |
| } |
| } |
| |
| /** |
| * ssctl_send_event() - send notification of other remote's SSR event |
| * @sysmon: sysmon context |
| * @name: other remote's name |
| */ |
| static void ssctl_send_event(struct qcom_sysmon *sysmon, |
| const struct sysmon_event *event) |
| { |
| struct ssctl_subsys_event_resp resp; |
| struct ssctl_subsys_event_req req; |
| struct qmi_txn txn; |
| int ret; |
| |
| memset(&resp, 0, sizeof(resp)); |
| ret = qmi_txn_init(&sysmon->qmi, &txn, ssctl_subsys_event_resp_ei, &resp); |
| if (ret < 0) { |
| dev_err(sysmon->dev, "failed to allocate QMI txn\n"); |
| return; |
| } |
| |
| memset(&req, 0, sizeof(req)); |
| strlcpy(req.subsys_name, event->subsys_name, sizeof(req.subsys_name)); |
| req.subsys_name_len = strlen(req.subsys_name); |
| req.event = event->ssr_event; |
| req.evt_driven_valid = true; |
| req.evt_driven = SSCTL_SSR_EVENT_FORCED; |
| |
| ret = qmi_send_request(&sysmon->qmi, &sysmon->ssctl, &txn, |
| SSCTL_SUBSYS_EVENT_REQ, 40, |
| ssctl_subsys_event_req_ei, &req); |
| if (ret < 0) { |
| dev_err(sysmon->dev, "failed to send shutdown request\n"); |
| qmi_txn_cancel(&txn); |
| return; |
| } |
| |
| ret = qmi_txn_wait(&txn, 5 * HZ); |
| if (ret < 0) |
| dev_err(sysmon->dev, "failed receiving QMI response\n"); |
| else if (resp.resp.result) |
| dev_err(sysmon->dev, "ssr event send failed\n"); |
| else |
| dev_dbg(sysmon->dev, "ssr event send completed\n"); |
| } |
| |
| /** |
| * ssctl_new_server() - QMI callback indicating a new service |
| * @qmi: QMI handle |
| * @svc: service information |
| * |
| * Return: 0 if we're interested in this service, -EINVAL otherwise. |
| */ |
| static int ssctl_new_server(struct qmi_handle *qmi, struct qmi_service *svc) |
| { |
| struct qcom_sysmon *sysmon = container_of(qmi, struct qcom_sysmon, qmi); |
| |
| switch (svc->version) { |
| case 1: |
| if (svc->instance != 0) |
| return -EINVAL; |
| if (strcmp(sysmon->name, "modem")) |
| return -EINVAL; |
| break; |
| case 2: |
| if (svc->instance != sysmon->ssctl_instance) |
| return -EINVAL; |
| break; |
| default: |
| return -EINVAL; |
| } |
| |
| sysmon->ssctl_version = svc->version; |
| |
| sysmon->ssctl.sq_family = AF_QIPCRTR; |
| sysmon->ssctl.sq_node = svc->node; |
| sysmon->ssctl.sq_port = svc->port; |
| |
| svc->priv = sysmon; |
| |
| return 0; |
| } |
| |
| /** |
| * ssctl_del_server() - QMI callback indicating that @svc is removed |
| * @qmi: QMI handle |
| * @svc: service information |
| */ |
| static void ssctl_del_server(struct qmi_handle *qmi, struct qmi_service *svc) |
| { |
| struct qcom_sysmon *sysmon = svc->priv; |
| |
| sysmon->ssctl_version = 0; |
| } |
| |
| static const struct qmi_ops ssctl_ops = { |
| .new_server = ssctl_new_server, |
| .del_server = ssctl_del_server, |
| }; |
| |
| static int sysmon_prepare(struct rproc_subdev *subdev) |
| { |
| struct qcom_sysmon *sysmon = container_of(subdev, struct qcom_sysmon, |
| subdev); |
| struct sysmon_event event = { |
| .subsys_name = sysmon->name, |
| .ssr_event = SSCTL_SSR_EVENT_BEFORE_POWERUP |
| }; |
| |
| blocking_notifier_call_chain(&sysmon_notifiers, 0, (void *)&event); |
| |
| return 0; |
| } |
| |
| static int sysmon_start(struct rproc_subdev *subdev) |
| { |
| struct qcom_sysmon *sysmon = container_of(subdev, struct qcom_sysmon, |
| subdev); |
| struct sysmon_event event = { |
| .subsys_name = sysmon->name, |
| .ssr_event = SSCTL_SSR_EVENT_AFTER_POWERUP |
| }; |
| |
| blocking_notifier_call_chain(&sysmon_notifiers, 0, (void *)&event); |
| |
| return 0; |
| } |
| |
| static void sysmon_stop(struct rproc_subdev *subdev, bool crashed) |
| { |
| struct qcom_sysmon *sysmon = container_of(subdev, struct qcom_sysmon, subdev); |
| struct sysmon_event event = { |
| .subsys_name = sysmon->name, |
| .ssr_event = SSCTL_SSR_EVENT_BEFORE_SHUTDOWN |
| }; |
| |
| blocking_notifier_call_chain(&sysmon_notifiers, 0, (void *)&event); |
| |
| /* Don't request graceful shutdown if we've crashed */ |
| if (crashed) |
| return; |
| |
| if (sysmon->ssctl_version) |
| ssctl_request_shutdown(sysmon); |
| else if (sysmon->ept) |
| sysmon_request_shutdown(sysmon); |
| } |
| |
| static void sysmon_unprepare(struct rproc_subdev *subdev) |
| { |
| struct qcom_sysmon *sysmon = container_of(subdev, struct qcom_sysmon, |
| subdev); |
| struct sysmon_event event = { |
| .subsys_name = sysmon->name, |
| .ssr_event = SSCTL_SSR_EVENT_AFTER_SHUTDOWN |
| }; |
| |
| blocking_notifier_call_chain(&sysmon_notifiers, 0, (void *)&event); |
| } |
| |
| /** |
| * sysmon_notify() - notify sysmon target of another's SSR |
| * @nb: notifier_block associated with sysmon instance |
| * @event: unused |
| * @data: SSR identifier of the remote that is going down |
| */ |
| static int sysmon_notify(struct notifier_block *nb, unsigned long event, |
| void *data) |
| { |
| struct qcom_sysmon *sysmon = container_of(nb, struct qcom_sysmon, nb); |
| struct rproc *rproc = sysmon->rproc; |
| struct sysmon_event *sysmon_event = data; |
| |
| /* Skip non-running rprocs and the originating instance */ |
| if (rproc->state != RPROC_RUNNING || |
| !strcmp(sysmon_event->subsys_name, sysmon->name)) { |
| dev_dbg(sysmon->dev, "not notifying %s\n", sysmon->name); |
| return NOTIFY_DONE; |
| } |
| |
| /* Only SSCTL version 2 supports SSR events */ |
| if (sysmon->ssctl_version == 2) |
| ssctl_send_event(sysmon, sysmon_event); |
| else if (sysmon->ept) |
| sysmon_send_event(sysmon, sysmon_event); |
| |
| return NOTIFY_DONE; |
| } |
| |
| static irqreturn_t sysmon_shutdown_interrupt(int irq, void *data) |
| { |
| struct qcom_sysmon *sysmon = data; |
| |
| complete(&sysmon->shutdown_comp); |
| |
| return IRQ_HANDLED; |
| } |
| |
| /** |
| * qcom_add_sysmon_subdev() - create a sysmon subdev for the given remoteproc |
| * @rproc: rproc context to associate the subdev with |
| * @name: name of this subdev, to use in SSR |
| * @ssctl_instance: instance id of the ssctl QMI service |
| * |
| * Return: A new qcom_sysmon object, or NULL on failure |
| */ |
| struct qcom_sysmon *qcom_add_sysmon_subdev(struct rproc *rproc, |
| const char *name, |
| int ssctl_instance) |
| { |
| struct qcom_sysmon *sysmon; |
| int ret; |
| |
| sysmon = kzalloc(sizeof(*sysmon), GFP_KERNEL); |
| if (!sysmon) |
| return ERR_PTR(-ENOMEM); |
| |
| sysmon->dev = rproc->dev.parent; |
| sysmon->rproc = rproc; |
| |
| sysmon->name = name; |
| sysmon->ssctl_instance = ssctl_instance; |
| |
| init_completion(&sysmon->comp); |
| init_completion(&sysmon->ind_comp); |
| init_completion(&sysmon->shutdown_comp); |
| mutex_init(&sysmon->lock); |
| |
| sysmon->shutdown_irq = of_irq_get_byname(sysmon->dev->of_node, |
| "shutdown-ack"); |
| if (sysmon->shutdown_irq < 0) { |
| if (sysmon->shutdown_irq != -ENODATA) { |
| dev_err(sysmon->dev, |
| "failed to retrieve shutdown-ack IRQ\n"); |
| return ERR_PTR(sysmon->shutdown_irq); |
| } |
| } else { |
| ret = devm_request_threaded_irq(sysmon->dev, |
| sysmon->shutdown_irq, |
| NULL, sysmon_shutdown_interrupt, |
| IRQF_TRIGGER_RISING | IRQF_ONESHOT, |
| "q6v5 shutdown-ack", sysmon); |
| if (ret) { |
| dev_err(sysmon->dev, |
| "failed to acquire shutdown-ack IRQ\n"); |
| return ERR_PTR(ret); |
| } |
| } |
| |
| ret = qmi_handle_init(&sysmon->qmi, SSCTL_MAX_MSG_LEN, &ssctl_ops, |
| qmi_indication_handler); |
| if (ret < 0) { |
| dev_err(sysmon->dev, "failed to initialize qmi handle\n"); |
| kfree(sysmon); |
| return ERR_PTR(ret); |
| } |
| |
| qmi_add_lookup(&sysmon->qmi, 43, 0, 0); |
| |
| sysmon->subdev.prepare = sysmon_prepare; |
| sysmon->subdev.start = sysmon_start; |
| sysmon->subdev.stop = sysmon_stop; |
| sysmon->subdev.unprepare = sysmon_unprepare; |
| |
| rproc_add_subdev(rproc, &sysmon->subdev); |
| |
| sysmon->nb.notifier_call = sysmon_notify; |
| blocking_notifier_chain_register(&sysmon_notifiers, &sysmon->nb); |
| |
| mutex_lock(&sysmon_lock); |
| list_add(&sysmon->node, &sysmon_list); |
| mutex_unlock(&sysmon_lock); |
| |
| return sysmon; |
| } |
| EXPORT_SYMBOL_GPL(qcom_add_sysmon_subdev); |
| |
| /** |
| * qcom_remove_sysmon_subdev() - release a qcom_sysmon |
| * @sysmon: sysmon context, as retrieved by qcom_add_sysmon_subdev() |
| */ |
| void qcom_remove_sysmon_subdev(struct qcom_sysmon *sysmon) |
| { |
| if (!sysmon) |
| return; |
| |
| mutex_lock(&sysmon_lock); |
| list_del(&sysmon->node); |
| mutex_unlock(&sysmon_lock); |
| |
| blocking_notifier_chain_unregister(&sysmon_notifiers, &sysmon->nb); |
| |
| rproc_remove_subdev(sysmon->rproc, &sysmon->subdev); |
| |
| qmi_handle_release(&sysmon->qmi); |
| |
| kfree(sysmon); |
| } |
| EXPORT_SYMBOL_GPL(qcom_remove_sysmon_subdev); |
| |
| /** |
| * sysmon_probe() - probe sys_mon channel |
| * @rpdev: rpmsg device handle |
| * |
| * Find the sysmon context associated with the ancestor remoteproc and assign |
| * this rpmsg device with said sysmon context. |
| * |
| * Return: 0 on success, negative errno on failure. |
| */ |
| static int sysmon_probe(struct rpmsg_device *rpdev) |
| { |
| struct qcom_sysmon *sysmon; |
| struct rproc *rproc; |
| |
| rproc = rproc_get_by_child(&rpdev->dev); |
| if (!rproc) { |
| dev_err(&rpdev->dev, "sysmon device not child of rproc\n"); |
| return -EINVAL; |
| } |
| |
| mutex_lock(&sysmon_lock); |
| list_for_each_entry(sysmon, &sysmon_list, node) { |
| if (sysmon->rproc == rproc) |
| goto found; |
| } |
| mutex_unlock(&sysmon_lock); |
| |
| dev_err(&rpdev->dev, "no sysmon associated with parent rproc\n"); |
| |
| return -EINVAL; |
| |
| found: |
| mutex_unlock(&sysmon_lock); |
| |
| rpdev->ept->priv = sysmon; |
| sysmon->ept = rpdev->ept; |
| |
| return 0; |
| } |
| |
| /** |
| * sysmon_remove() - sys_mon channel remove handler |
| * @rpdev: rpmsg device handle |
| * |
| * Disassociate the rpmsg device with the sysmon instance. |
| */ |
| static void sysmon_remove(struct rpmsg_device *rpdev) |
| { |
| struct qcom_sysmon *sysmon = rpdev->ept->priv; |
| |
| sysmon->ept = NULL; |
| } |
| |
| static const struct rpmsg_device_id sysmon_match[] = { |
| { "sys_mon" }, |
| {} |
| }; |
| |
| static struct rpmsg_driver sysmon_driver = { |
| .probe = sysmon_probe, |
| .remove = sysmon_remove, |
| .callback = sysmon_callback, |
| .id_table = sysmon_match, |
| .drv = { |
| .name = "qcom_sysmon", |
| }, |
| }; |
| |
| module_rpmsg_driver(sysmon_driver); |
| |
| MODULE_DESCRIPTION("Qualcomm sysmon driver"); |
| MODULE_LICENSE("GPL v2"); |