drivers/siox/siox.h

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Copyright (C) 2015-2017 Pengutronix, Uwe Kleine-König <kernel@pengutronix.de>
   4  */
   5 #include <linux/kernel.h>
   6 #include <linux/kthread.h>
   7 #include <linux/siox.h>
   8
   9 #define to_siox_master(_dev)    container_of((_dev), struct siox_master, dev)
  10 struct siox_master {
  11         /* these fields should be initialized by the driver */
  12         int busno;
  13         int (*pushpull)(struct siox_master *smaster,
  14                         size_t setbuf_len, const u8 setbuf[],
  15                         size_t getbuf_len, u8 getbuf[]);
  16
  17         /* might be initialized by the driver, if 0 it is set to HZ / 40 */
  18         unsigned long poll_interval; /* in jiffies */
  19
  20         /* framework private stuff */
  21         struct mutex lock;
  22         bool active;
  23         struct module *owner;
  24         struct device dev;
  25         unsigned int num_devices;
  26         struct list_head devices;
  27
  28         size_t setbuf_len, getbuf_len;
  29         size_t buf_len;
  30         u8 *buf;
  31         u8 status;
  32
  33         unsigned long last_poll;
  34         struct task_struct *poll_thread;
  35 };
  36
  37 static inline void *siox_master_get_devdata(struct siox_master *smaster)
  38 {
  39         return dev_get_drvdata(&smaster->dev);
  40 }
  41
  42 struct siox_master *siox_master_alloc(struct device *dev, size_t size);
  43 static inline void siox_master_put(struct siox_master *smaster)
  44 {
  45         put_device(&smaster->dev);
  46 }
  47
  48 int siox_master_register(struct siox_master *smaster);
  49 void siox_master_unregister(struct siox_master *smaster);