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); 50