guoyf2
a72bbed4eb
changes; fix https://gerrit.mot.com/#/c/2220048/ build error. Change-Id: I7c88bf76322c5ac32267395d4dab06253826b06e Signed-off-by: guoyf2 <guoyf2@lenovo.com> Reviewed-on: https://gerrit.mot.com/2221136 SLTApproved: Slta Waiver SME-Granted: SME Approvals Granted Tested-by: Jira Key Reviewed-by: Hong Zhang <zhangh12@motorola.com> Reviewed-by: Xiangpo Zhao <zhaoxp3@motorola.com> Submit-Approved: Jira Key
154 lines
3.2 KiB
C
154 lines
3.2 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (c) 2018, 2021, The Linux Foundation. All rights reserved.
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*/
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/platform_device.h>
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#include <linux/device.h>
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#include <linux/kernel.h>
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#include <linux/delay.h>
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#include <linux/component.h>
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#include <soc/soundwire.h>
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#define SWR_MAX_RETRY 5
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struct wcd937x_slave_priv {
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struct swr_device *swr_slave;
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};
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static int wcd937x_slave_bind(struct device *dev,
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struct device *master, void *data)
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{
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int ret = 0;
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struct wcd937x_slave_priv *wcd937x_slave = NULL;
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uint8_t devnum = 0;
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struct swr_device *pdev = to_swr_device(dev);
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int retry = SWR_MAX_RETRY;
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if (pdev == NULL) {
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dev_err(dev, "%s: pdev is NULL\n", __func__);
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return -EINVAL;
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}
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wcd937x_slave = devm_kzalloc(&pdev->dev,
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sizeof(struct wcd937x_slave_priv), GFP_KERNEL);
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if (!wcd937x_slave)
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return -ENOMEM;
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swr_set_dev_data(pdev, wcd937x_slave);
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wcd937x_slave->swr_slave = pdev;
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do {
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/* Add delay for soundwire enumeration */
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usleep_range(100, 110);
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ret = swr_get_logical_dev_num(pdev, pdev->addr, &devnum);
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} while (ret && --retry);
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if (ret) {
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dev_dbg(&pdev->dev,
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"%s get devnum %d for dev addr %lx failed\n",
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__func__, devnum, pdev->addr);
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swr_remove_device(pdev);
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return ret;
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}
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pdev->dev_num = devnum;
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return ret;
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}
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static void wcd937x_slave_unbind(struct device *dev,
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struct device *master, void *data)
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{
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struct wcd937x_slave_priv *wcd937x_slave = NULL;
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struct swr_device *pdev = to_swr_device(dev);
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if (pdev == NULL) {
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dev_err(dev, "%s: pdev is NULL\n", __func__);
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return;
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}
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wcd937x_slave = swr_get_dev_data(pdev);
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if (!wcd937x_slave) {
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dev_err(&pdev->dev, "%s: wcd937x_slave is NULL\n", __func__);
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return;
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}
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swr_set_dev_data(pdev, NULL);
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}
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static const struct swr_device_id wcd937x_swr_id[] = {
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{"wcd937x-slave", 0},
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{}
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};
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static const struct of_device_id wcd937x_swr_dt_match[] = {
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{
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.compatible = "qcom,wcd937x-slave",
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},
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{}
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};
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static const struct component_ops wcd937x_slave_comp_ops = {
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.bind = wcd937x_slave_bind,
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.unbind = wcd937x_slave_unbind,
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};
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static int wcd937x_swr_up(struct swr_device *pdev)
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{
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return 0;
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}
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static int wcd937x_swr_down(struct swr_device *pdev)
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{
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return 0;
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}
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static int wcd937x_swr_reset(struct swr_device *pdev)
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{
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return 0;
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}
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static int wcd937x_swr_probe(struct swr_device *pdev)
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{
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return component_add(&pdev->dev, &wcd937x_slave_comp_ops);
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}
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static int wcd937x_swr_remove(struct swr_device *pdev)
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{
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component_del(&pdev->dev, &wcd937x_slave_comp_ops);
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return 0;
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}
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static struct swr_driver wcd937x_slave_driver = {
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.driver = {
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.name = "wcd937x-slave",
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.owner = THIS_MODULE,
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.of_match_table = wcd937x_swr_dt_match,
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},
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.probe = wcd937x_swr_probe,
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.remove = wcd937x_swr_remove,
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.id_table = wcd937x_swr_id,
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.device_up = wcd937x_swr_up,
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.device_down = wcd937x_swr_down,
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.reset_device = wcd937x_swr_reset,
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};
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static int __init wcd937x_slave_init(void)
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{
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return swr_driver_register(&wcd937x_slave_driver);
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}
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static void __exit wcd937x_slave_exit(void)
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{
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swr_driver_unregister(&wcd937x_slave_driver);
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}
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module_init(wcd937x_slave_init);
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module_exit(wcd937x_slave_exit);
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MODULE_DESCRIPTION("WCD937X Swr Slave driver");
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MODULE_LICENSE("GPL v2");
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