drivers/siox/siox.h

0001 /* SPDX-License-Identifier: GPL-2.0 */
0002 /*
0003  * Copyright (C) 2015-2017 Pengutronix, Uwe Kleine-König <kernel@pengutronix.de>
0004  */
0005 #include <linux/kernel.h>
0006 #include <linux/kthread.h>
0007 #include <linux/siox.h>
0008
0009 #define to_siox_master(_dev)    container_of((_dev), struct siox_master, dev)
0010 struct siox_master {
0011     /* these fields should be initialized by the driver */
0012     int busno;
0013     int (*pushpull)(struct siox_master *smaster,
0014             size_t setbuf_len, const u8 setbuf[],
0015             size_t getbuf_len, u8 getbuf[]);
0016
0017     /* might be initialized by the driver, if 0 it is set to HZ / 40 */
0018     unsigned long poll_interval; /* in jiffies */
0019
0020     /* framework private stuff */
0021     struct mutex lock;
0022     bool active;
0023     struct module *owner;
0024     struct device dev;
0025     unsigned int num_devices;
0026     struct list_head devices;
0027
0028     size_t setbuf_len, getbuf_len;
0029     size_t buf_len;
0030     u8 *buf;
0031     u8 status;
0032
0033     unsigned long last_poll;
0034     struct task_struct *poll_thread;
0035 };
0036
0037 static inline void *siox_master_get_devdata(struct siox_master *smaster)
0038 {
0039     return dev_get_drvdata(&smaster->dev);
0040 }
0041
0042 struct siox_master *siox_master_alloc(struct device *dev, size_t size);
0043 static inline void siox_master_put(struct siox_master *smaster)
0044 {
0045     put_device(&smaster->dev);
0046 }
0047
0048 int siox_master_register(struct siox_master *smaster);
0049 void siox_master_unregister(struct siox_master *smaster);