704 lines
18 KiB
C
704 lines
18 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Intel ECLite opregion driver for talking to ECLite firmware running on
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* Intel Integrated Sensor Hub (ISH) using ISH Transport Protocol (ISHTP)
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*
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* Copyright (c) 2021, Intel Corporation.
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*/
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#include <linux/acpi.h>
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#include <linux/bitops.h>
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#include <linux/device.h>
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#include <linux/errno.h>
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#include <linux/intel-ish-client-if.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/mutex.h>
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#include <linux/slab.h>
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#include <linux/suspend.h>
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#include <linux/types.h>
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#include <linux/uuid.h>
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#include <linux/uaccess.h>
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#define ECLITE_DATA_OPREGION_ID 0x9E
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#define ECLITE_CMD_OPREGION_ID 0x9F
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#define ECL_MSG_DATA 0x1
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#define ECL_MSG_EVENT 0x2
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#define ECL_ISH_READ 0x1
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#define ECL_ISH_WRITE 0x2
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#define ECL_ISH_HEADER_VERSION 0
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#define ECL_CL_RX_RING_SIZE 16
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#define ECL_CL_TX_RING_SIZE 8
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#define ECL_DATA_OPR_BUFLEN 384
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#define ECL_EVENTS_NOTIFY 333
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#define cmd_opr_offsetof(element) offsetof(struct opregion_cmd, element)
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#define cl_data_to_dev(opr_dev) ishtp_device((opr_dev)->cl_device)
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#ifndef BITS_TO_BYTES
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#define BITS_TO_BYTES(x) ((x) / 8)
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#endif
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struct opregion_cmd {
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unsigned int command;
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unsigned int offset;
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unsigned int length;
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unsigned int event_id;
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};
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struct opregion_data {
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char data[ECL_DATA_OPR_BUFLEN];
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};
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struct opregion_context {
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struct opregion_cmd cmd_area;
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struct opregion_data data_area;
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};
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struct ecl_message_header {
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unsigned int version:2;
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unsigned int data_type:2;
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unsigned int request_type:2;
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unsigned int offset:9;
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unsigned int data_len:9;
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unsigned int event:8;
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};
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struct ecl_message {
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struct ecl_message_header header;
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char payload[ECL_DATA_OPR_BUFLEN];
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};
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struct ishtp_opregion_dev {
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struct opregion_context opr_context;
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struct ishtp_cl *ecl_ishtp_cl;
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struct ishtp_cl_device *cl_device;
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struct ishtp_fw_client *fw_client;
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struct ishtp_cl_rb *rb;
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struct acpi_device *adev;
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unsigned int dsm_event_id;
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unsigned int ish_link_ready;
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unsigned int ish_read_done;
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unsigned int acpi_init_done;
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wait_queue_head_t read_wait;
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struct work_struct event_work;
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struct work_struct reset_work;
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/* lock for opregion context */
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struct mutex lock;
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};
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/* eclite ishtp client UUID: 6a19cc4b-d760-4de3-b14d-f25ebd0fbcd9 */
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static const struct ishtp_device_id ecl_ishtp_id_table[] = {
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{ .guid = GUID_INIT(0x6a19cc4b, 0xd760, 0x4de3,
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0xb1, 0x4d, 0xf2, 0x5e, 0xbd, 0xf, 0xbc, 0xd9), },
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{ }
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};
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MODULE_DEVICE_TABLE(ishtp, ecl_ishtp_id_table);
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/* ACPI DSM UUID: 91d936a7-1f01-49c6-a6b4-72f00ad8d8a5 */
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static const guid_t ecl_acpi_guid =
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GUID_INIT(0x91d936a7, 0x1f01, 0x49c6, 0xa6,
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0xb4, 0x72, 0xf0, 0x0a, 0xd8, 0xd8, 0xa5);
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/**
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* ecl_ish_cl_read() - Read data from eclite FW
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*
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* @opr_dev: pointer to opregion device
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*
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* This function issues a read request to eclite FW and waits until it
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* receives a response. When response is received the read data is copied to
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* opregion buffer.
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*/
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static int ecl_ish_cl_read(struct ishtp_opregion_dev *opr_dev)
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{
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struct ecl_message_header header;
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int len, rv;
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if (!opr_dev->ish_link_ready)
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return -EIO;
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if ((opr_dev->opr_context.cmd_area.offset +
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opr_dev->opr_context.cmd_area.length) > ECL_DATA_OPR_BUFLEN) {
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return -EINVAL;
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}
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header.version = ECL_ISH_HEADER_VERSION;
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header.data_type = ECL_MSG_DATA;
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header.request_type = ECL_ISH_READ;
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header.offset = opr_dev->opr_context.cmd_area.offset;
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header.data_len = opr_dev->opr_context.cmd_area.length;
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header.event = opr_dev->opr_context.cmd_area.event_id;
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len = sizeof(header);
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opr_dev->ish_read_done = false;
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rv = ishtp_cl_send(opr_dev->ecl_ishtp_cl, (uint8_t *)&header, len);
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if (rv) {
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dev_err(cl_data_to_dev(opr_dev), "ish-read : send failed\n");
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return -EIO;
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}
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dev_dbg(cl_data_to_dev(opr_dev),
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"[ish_rd] Req: off : %x, len : %x\n",
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header.offset,
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header.data_len);
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rv = wait_event_interruptible_timeout(opr_dev->read_wait,
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opr_dev->ish_read_done,
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2 * HZ);
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if (!rv) {
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dev_err(cl_data_to_dev(opr_dev),
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"[ish_rd] No response from firmware\n");
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return -EIO;
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}
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return 0;
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}
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/**
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* ecl_ish_cl_write() - This function writes data to eclite FW.
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*
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* @opr_dev: pointer to opregion device
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*
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* This function writes data to eclite FW.
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*/
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static int ecl_ish_cl_write(struct ishtp_opregion_dev *opr_dev)
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{
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struct ecl_message message;
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int len;
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if (!opr_dev->ish_link_ready)
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return -EIO;
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if ((opr_dev->opr_context.cmd_area.offset +
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opr_dev->opr_context.cmd_area.length) > ECL_DATA_OPR_BUFLEN) {
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return -EINVAL;
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}
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message.header.version = ECL_ISH_HEADER_VERSION;
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message.header.data_type = ECL_MSG_DATA;
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message.header.request_type = ECL_ISH_WRITE;
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message.header.offset = opr_dev->opr_context.cmd_area.offset;
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message.header.data_len = opr_dev->opr_context.cmd_area.length;
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message.header.event = opr_dev->opr_context.cmd_area.event_id;
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len = sizeof(struct ecl_message_header) + message.header.data_len;
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memcpy(message.payload,
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opr_dev->opr_context.data_area.data + message.header.offset,
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message.header.data_len);
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dev_dbg(cl_data_to_dev(opr_dev),
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"[ish_wr] off : %x, len : %x\n",
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message.header.offset,
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message.header.data_len);
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return ishtp_cl_send(opr_dev->ecl_ishtp_cl, (uint8_t *)&message, len);
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}
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static acpi_status
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ecl_opregion_cmd_handler(u32 function, acpi_physical_address address,
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u32 bits, u64 *value64,
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void *handler_context, void *region_context)
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{
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struct ishtp_opregion_dev *opr_dev;
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struct opregion_cmd *cmd;
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acpi_status status = AE_OK;
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if (!region_context || !value64)
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return AE_BAD_PARAMETER;
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if (function == ACPI_READ)
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return AE_ERROR;
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opr_dev = (struct ishtp_opregion_dev *)region_context;
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mutex_lock(&opr_dev->lock);
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cmd = &opr_dev->opr_context.cmd_area;
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switch (address) {
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case cmd_opr_offsetof(command):
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cmd->command = (u32)*value64;
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if (cmd->command == ECL_ISH_READ)
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status = ecl_ish_cl_read(opr_dev);
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else if (cmd->command == ECL_ISH_WRITE)
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status = ecl_ish_cl_write(opr_dev);
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else
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status = AE_ERROR;
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break;
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case cmd_opr_offsetof(offset):
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cmd->offset = (u32)*value64;
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break;
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case cmd_opr_offsetof(length):
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cmd->length = (u32)*value64;
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break;
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case cmd_opr_offsetof(event_id):
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cmd->event_id = (u32)*value64;
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break;
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default:
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status = AE_ERROR;
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}
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mutex_unlock(&opr_dev->lock);
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return status;
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}
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static acpi_status
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ecl_opregion_data_handler(u32 function, acpi_physical_address address,
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u32 bits, u64 *value64,
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void *handler_context, void *region_context)
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{
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struct ishtp_opregion_dev *opr_dev;
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unsigned int bytes = BITS_TO_BYTES(bits);
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void *data_addr;
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if (!region_context || !value64)
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return AE_BAD_PARAMETER;
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if (address + bytes > ECL_DATA_OPR_BUFLEN)
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return AE_BAD_PARAMETER;
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opr_dev = (struct ishtp_opregion_dev *)region_context;
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mutex_lock(&opr_dev->lock);
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data_addr = &opr_dev->opr_context.data_area.data[address];
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if (function == ACPI_READ) {
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memcpy(value64, data_addr, bytes);
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} else if (function == ACPI_WRITE) {
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memcpy(data_addr, value64, bytes);
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} else {
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mutex_unlock(&opr_dev->lock);
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return AE_BAD_PARAMETER;
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}
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mutex_unlock(&opr_dev->lock);
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return AE_OK;
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}
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static int acpi_find_eclite_device(struct ishtp_opregion_dev *opr_dev)
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{
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struct acpi_device *adev;
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/* Find ECLite device and save reference */
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adev = acpi_dev_get_first_match_dev("INTC1035", NULL, -1);
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if (!adev) {
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dev_err(cl_data_to_dev(opr_dev), "eclite ACPI device not found\n");
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return -ENODEV;
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}
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opr_dev->adev = adev;
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return 0;
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}
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static int acpi_opregion_init(struct ishtp_opregion_dev *opr_dev)
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{
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acpi_status status;
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status = acpi_install_address_space_handler(opr_dev->adev->handle,
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ECLITE_CMD_OPREGION_ID,
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ecl_opregion_cmd_handler,
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NULL, opr_dev);
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if (ACPI_FAILURE(status)) {
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dev_err(cl_data_to_dev(opr_dev),
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"cmd space handler install failed\n");
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return -ENODEV;
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}
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status = acpi_install_address_space_handler(opr_dev->adev->handle,
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ECLITE_DATA_OPREGION_ID,
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ecl_opregion_data_handler,
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NULL, opr_dev);
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if (ACPI_FAILURE(status)) {
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dev_err(cl_data_to_dev(opr_dev),
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"data space handler install failed\n");
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acpi_remove_address_space_handler(opr_dev->adev->handle,
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ECLITE_CMD_OPREGION_ID,
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ecl_opregion_cmd_handler);
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return -ENODEV;
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}
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opr_dev->acpi_init_done = true;
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dev_dbg(cl_data_to_dev(opr_dev), "Opregion handlers are installed\n");
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return 0;
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}
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static void acpi_opregion_deinit(struct ishtp_opregion_dev *opr_dev)
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{
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acpi_remove_address_space_handler(opr_dev->adev->handle,
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ECLITE_CMD_OPREGION_ID,
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ecl_opregion_cmd_handler);
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acpi_remove_address_space_handler(opr_dev->adev->handle,
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ECLITE_DATA_OPREGION_ID,
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ecl_opregion_data_handler);
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opr_dev->acpi_init_done = false;
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}
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static void ecl_acpi_invoke_dsm(struct work_struct *work)
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{
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struct ishtp_opregion_dev *opr_dev;
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union acpi_object *obj;
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opr_dev = container_of(work, struct ishtp_opregion_dev, event_work);
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if (!opr_dev->acpi_init_done)
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return;
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obj = acpi_evaluate_dsm(opr_dev->adev->handle, &ecl_acpi_guid, 0,
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opr_dev->dsm_event_id, NULL);
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if (!obj) {
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dev_warn(cl_data_to_dev(opr_dev), "_DSM fn call failed\n");
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return;
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}
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dev_dbg(cl_data_to_dev(opr_dev), "Exec DSM function code: %d success\n",
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opr_dev->dsm_event_id);
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ACPI_FREE(obj);
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}
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static void ecl_ish_process_rx_data(struct ishtp_opregion_dev *opr_dev)
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{
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struct ecl_message *message =
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(struct ecl_message *)opr_dev->rb->buffer.data;
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dev_dbg(cl_data_to_dev(opr_dev),
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"[ish_rd] Resp: off : %x, len : %x\n",
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message->header.offset,
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message->header.data_len);
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if ((message->header.offset + message->header.data_len) >
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ECL_DATA_OPR_BUFLEN) {
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return;
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}
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memcpy(opr_dev->opr_context.data_area.data + message->header.offset,
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message->payload, message->header.data_len);
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opr_dev->ish_read_done = true;
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wake_up_interruptible(&opr_dev->read_wait);
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}
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static void ecl_ish_process_rx_event(struct ishtp_opregion_dev *opr_dev)
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{
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struct ecl_message_header *header =
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(struct ecl_message_header *)opr_dev->rb->buffer.data;
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dev_dbg(cl_data_to_dev(opr_dev),
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"[ish_ev] Evt received: %8x\n", header->event);
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opr_dev->dsm_event_id = header->event;
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schedule_work(&opr_dev->event_work);
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}
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static int ecl_ish_cl_enable_events(struct ishtp_opregion_dev *opr_dev,
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bool config_enable)
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{
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struct ecl_message message;
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int len;
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message.header.version = ECL_ISH_HEADER_VERSION;
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message.header.data_type = ECL_MSG_DATA;
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message.header.request_type = ECL_ISH_WRITE;
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message.header.offset = ECL_EVENTS_NOTIFY;
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message.header.data_len = 1;
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message.payload[0] = config_enable;
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len = sizeof(struct ecl_message_header) + message.header.data_len;
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return ishtp_cl_send(opr_dev->ecl_ishtp_cl, (uint8_t *)&message, len);
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}
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static void ecl_ishtp_cl_event_cb(struct ishtp_cl_device *cl_device)
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{
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struct ishtp_cl *ecl_ishtp_cl = ishtp_get_drvdata(cl_device);
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struct ishtp_opregion_dev *opr_dev;
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struct ecl_message_header *header;
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struct ishtp_cl_rb *rb;
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opr_dev = ishtp_get_client_data(ecl_ishtp_cl);
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while ((rb = ishtp_cl_rx_get_rb(opr_dev->ecl_ishtp_cl)) != NULL) {
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opr_dev->rb = rb;
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header = (struct ecl_message_header *)rb->buffer.data;
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if (header->data_type == ECL_MSG_DATA)
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ecl_ish_process_rx_data(opr_dev);
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else if (header->data_type == ECL_MSG_EVENT)
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ecl_ish_process_rx_event(opr_dev);
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else
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/* Got an event with wrong data_type, ignore it */
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dev_err(cl_data_to_dev(opr_dev),
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"[ish_cb] Received wrong data_type\n");
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ishtp_cl_io_rb_recycle(rb);
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}
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}
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static int ecl_ishtp_cl_init(struct ishtp_cl *ecl_ishtp_cl)
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{
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struct ishtp_opregion_dev *opr_dev =
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ishtp_get_client_data(ecl_ishtp_cl);
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struct ishtp_fw_client *fw_client;
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struct ishtp_device *dev;
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int rv;
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rv = ishtp_cl_link(ecl_ishtp_cl);
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if (rv) {
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dev_err(cl_data_to_dev(opr_dev), "ishtp_cl_link failed\n");
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return rv;
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}
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dev = ishtp_get_ishtp_device(ecl_ishtp_cl);
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/* Connect to FW client */
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ishtp_set_tx_ring_size(ecl_ishtp_cl, ECL_CL_TX_RING_SIZE);
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ishtp_set_rx_ring_size(ecl_ishtp_cl, ECL_CL_RX_RING_SIZE);
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fw_client = ishtp_fw_cl_get_client(dev, &ecl_ishtp_id_table[0].guid);
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if (!fw_client) {
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dev_err(cl_data_to_dev(opr_dev), "fw client not found\n");
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return -ENOENT;
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}
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ishtp_cl_set_fw_client_id(ecl_ishtp_cl,
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ishtp_get_fw_client_id(fw_client));
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ishtp_set_connection_state(ecl_ishtp_cl, ISHTP_CL_CONNECTING);
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rv = ishtp_cl_connect(ecl_ishtp_cl);
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if (rv) {
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dev_err(cl_data_to_dev(opr_dev), "client connect failed\n");
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ishtp_cl_unlink(ecl_ishtp_cl);
|
|
return rv;
|
|
}
|
|
|
|
dev_dbg(cl_data_to_dev(opr_dev), "Host connected to fw client\n");
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void ecl_ishtp_cl_deinit(struct ishtp_cl *ecl_ishtp_cl)
|
|
{
|
|
ishtp_cl_unlink(ecl_ishtp_cl);
|
|
ishtp_cl_flush_queues(ecl_ishtp_cl);
|
|
ishtp_cl_free(ecl_ishtp_cl);
|
|
}
|
|
|
|
static void ecl_ishtp_cl_reset_handler(struct work_struct *work)
|
|
{
|
|
struct ishtp_opregion_dev *opr_dev;
|
|
struct ishtp_cl_device *cl_device;
|
|
struct ishtp_cl *ecl_ishtp_cl;
|
|
int rv;
|
|
int retry;
|
|
|
|
opr_dev = container_of(work, struct ishtp_opregion_dev, reset_work);
|
|
|
|
opr_dev->ish_link_ready = false;
|
|
|
|
cl_device = opr_dev->cl_device;
|
|
ecl_ishtp_cl = opr_dev->ecl_ishtp_cl;
|
|
|
|
ecl_ishtp_cl_deinit(ecl_ishtp_cl);
|
|
|
|
ecl_ishtp_cl = ishtp_cl_allocate(cl_device);
|
|
if (!ecl_ishtp_cl)
|
|
return;
|
|
|
|
ishtp_set_drvdata(cl_device, ecl_ishtp_cl);
|
|
ishtp_set_client_data(ecl_ishtp_cl, opr_dev);
|
|
|
|
opr_dev->ecl_ishtp_cl = ecl_ishtp_cl;
|
|
|
|
for (retry = 0; retry < 3; ++retry) {
|
|
rv = ecl_ishtp_cl_init(ecl_ishtp_cl);
|
|
if (!rv)
|
|
break;
|
|
}
|
|
if (rv) {
|
|
ishtp_cl_free(ecl_ishtp_cl);
|
|
opr_dev->ecl_ishtp_cl = NULL;
|
|
dev_err(cl_data_to_dev(opr_dev),
|
|
"[ish_rst] Reset failed. Link not ready.\n");
|
|
return;
|
|
}
|
|
|
|
ishtp_register_event_cb(cl_device, ecl_ishtp_cl_event_cb);
|
|
dev_info(cl_data_to_dev(opr_dev),
|
|
"[ish_rst] Reset Success. Link ready.\n");
|
|
|
|
opr_dev->ish_link_ready = true;
|
|
|
|
if (opr_dev->acpi_init_done)
|
|
return;
|
|
|
|
rv = acpi_opregion_init(opr_dev);
|
|
if (rv) {
|
|
dev_err(cl_data_to_dev(opr_dev),
|
|
"ACPI opregion init failed\n");
|
|
}
|
|
}
|
|
|
|
static int ecl_ishtp_cl_probe(struct ishtp_cl_device *cl_device)
|
|
{
|
|
struct ishtp_cl *ecl_ishtp_cl;
|
|
struct ishtp_opregion_dev *opr_dev;
|
|
int rv;
|
|
|
|
opr_dev = devm_kzalloc(ishtp_device(cl_device), sizeof(*opr_dev),
|
|
GFP_KERNEL);
|
|
if (!opr_dev)
|
|
return -ENOMEM;
|
|
|
|
ecl_ishtp_cl = ishtp_cl_allocate(cl_device);
|
|
if (!ecl_ishtp_cl)
|
|
return -ENOMEM;
|
|
|
|
ishtp_set_drvdata(cl_device, ecl_ishtp_cl);
|
|
ishtp_set_client_data(ecl_ishtp_cl, opr_dev);
|
|
opr_dev->ecl_ishtp_cl = ecl_ishtp_cl;
|
|
opr_dev->cl_device = cl_device;
|
|
|
|
init_waitqueue_head(&opr_dev->read_wait);
|
|
INIT_WORK(&opr_dev->event_work, ecl_acpi_invoke_dsm);
|
|
INIT_WORK(&opr_dev->reset_work, ecl_ishtp_cl_reset_handler);
|
|
|
|
/* Initialize ish client device */
|
|
rv = ecl_ishtp_cl_init(ecl_ishtp_cl);
|
|
if (rv) {
|
|
dev_err(cl_data_to_dev(opr_dev), "Client init failed\n");
|
|
goto err_exit;
|
|
}
|
|
|
|
dev_dbg(cl_data_to_dev(opr_dev), "eclite-ishtp client initialised\n");
|
|
|
|
opr_dev->ish_link_ready = true;
|
|
mutex_init(&opr_dev->lock);
|
|
|
|
rv = acpi_find_eclite_device(opr_dev);
|
|
if (rv) {
|
|
dev_err(cl_data_to_dev(opr_dev), "ECLite ACPI ID not found\n");
|
|
goto err_exit;
|
|
}
|
|
|
|
/* Register a handler for eclite fw events */
|
|
ishtp_register_event_cb(cl_device, ecl_ishtp_cl_event_cb);
|
|
|
|
/* Now init opregion handlers */
|
|
rv = acpi_opregion_init(opr_dev);
|
|
if (rv) {
|
|
dev_err(cl_data_to_dev(opr_dev), "ACPI opregion init failed\n");
|
|
goto err_exit;
|
|
}
|
|
|
|
/* Reprobe devices depending on ECLite - battery, fan, etc. */
|
|
acpi_dev_clear_dependencies(opr_dev->adev);
|
|
|
|
return 0;
|
|
err_exit:
|
|
ishtp_set_connection_state(ecl_ishtp_cl, ISHTP_CL_DISCONNECTING);
|
|
ishtp_cl_disconnect(ecl_ishtp_cl);
|
|
ecl_ishtp_cl_deinit(ecl_ishtp_cl);
|
|
|
|
return rv;
|
|
}
|
|
|
|
static void ecl_ishtp_cl_remove(struct ishtp_cl_device *cl_device)
|
|
{
|
|
struct ishtp_cl *ecl_ishtp_cl = ishtp_get_drvdata(cl_device);
|
|
struct ishtp_opregion_dev *opr_dev =
|
|
ishtp_get_client_data(ecl_ishtp_cl);
|
|
|
|
if (opr_dev->acpi_init_done)
|
|
acpi_opregion_deinit(opr_dev);
|
|
|
|
acpi_dev_put(opr_dev->adev);
|
|
|
|
ishtp_set_connection_state(ecl_ishtp_cl, ISHTP_CL_DISCONNECTING);
|
|
ishtp_cl_disconnect(ecl_ishtp_cl);
|
|
ecl_ishtp_cl_deinit(ecl_ishtp_cl);
|
|
|
|
cancel_work_sync(&opr_dev->reset_work);
|
|
cancel_work_sync(&opr_dev->event_work);
|
|
}
|
|
|
|
static int ecl_ishtp_cl_reset(struct ishtp_cl_device *cl_device)
|
|
{
|
|
struct ishtp_cl *ecl_ishtp_cl = ishtp_get_drvdata(cl_device);
|
|
struct ishtp_opregion_dev *opr_dev =
|
|
ishtp_get_client_data(ecl_ishtp_cl);
|
|
|
|
schedule_work(&opr_dev->reset_work);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ecl_ishtp_cl_suspend(struct device *device)
|
|
{
|
|
struct ishtp_cl_device *cl_device = ishtp_dev_to_cl_device(device);
|
|
struct ishtp_cl *ecl_ishtp_cl = ishtp_get_drvdata(cl_device);
|
|
struct ishtp_opregion_dev *opr_dev =
|
|
ishtp_get_client_data(ecl_ishtp_cl);
|
|
|
|
if (acpi_target_system_state() == ACPI_STATE_S0)
|
|
return 0;
|
|
|
|
acpi_opregion_deinit(opr_dev);
|
|
ecl_ish_cl_enable_events(opr_dev, false);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ecl_ishtp_cl_resume(struct device *device)
|
|
{
|
|
/* A reset is expected to call after an Sx. At this point
|
|
* we are not sure if the link is up or not to restore anything,
|
|
* so do nothing in resume path
|
|
*/
|
|
return 0;
|
|
}
|
|
|
|
static const struct dev_pm_ops ecl_ishtp_pm_ops = {
|
|
.suspend = ecl_ishtp_cl_suspend,
|
|
.resume = ecl_ishtp_cl_resume,
|
|
};
|
|
|
|
static struct ishtp_cl_driver ecl_ishtp_cl_driver = {
|
|
.name = "ishtp-eclite",
|
|
.id = ecl_ishtp_id_table,
|
|
.probe = ecl_ishtp_cl_probe,
|
|
.remove = ecl_ishtp_cl_remove,
|
|
.reset = ecl_ishtp_cl_reset,
|
|
.driver.pm = &ecl_ishtp_pm_ops,
|
|
};
|
|
|
|
static int __init ecl_ishtp_init(void)
|
|
{
|
|
return ishtp_cl_driver_register(&ecl_ishtp_cl_driver, THIS_MODULE);
|
|
}
|
|
|
|
static void __exit ecl_ishtp_exit(void)
|
|
{
|
|
return ishtp_cl_driver_unregister(&ecl_ishtp_cl_driver);
|
|
}
|
|
|
|
late_initcall(ecl_ishtp_init);
|
|
module_exit(ecl_ishtp_exit);
|
|
|
|
MODULE_DESCRIPTION("ISH ISHTP eclite client opregion driver");
|
|
MODULE_AUTHOR("K Naduvalath, Sumesh <sumesh.k.naduvalath@intel.com>");
|
|
|
|
MODULE_LICENSE("GPL v2");
|