diff options
Diffstat (limited to 'drivers/siox/siox.h')
| -rw-r--r-- | drivers/siox/siox.h | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/drivers/siox/siox.h b/drivers/siox/siox.h new file mode 100644 index 000000000..f08b43b71 --- /dev/null +++ b/drivers/siox/siox.h @@ -0,0 +1,49 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (C) 2015-2017 Pengutronix, Uwe Kleine-König <kernel@pengutronix.de> + */ +#include <linux/kernel.h> +#include <linux/kthread.h> +#include <linux/siox.h> + +#define to_siox_master(_dev) container_of((_dev), struct siox_master, dev) +struct siox_master { + /* these fields should be initialized by the driver */ + int busno; + int (*pushpull)(struct siox_master *smaster, + size_t setbuf_len, const u8 setbuf[], + size_t getbuf_len, u8 getbuf[]); + + /* might be initialized by the driver, if 0 it is set to HZ / 40 */ + unsigned long poll_interval; /* in jiffies */ + + /* framework private stuff */ + struct mutex lock; + bool active; + struct module *owner; + struct device dev; + unsigned int num_devices; + struct list_head devices; + + size_t setbuf_len, getbuf_len; + size_t buf_len; + u8 *buf; + u8 status; + + unsigned long last_poll; + struct task_struct *poll_thread; +}; + +static inline void *siox_master_get_devdata(struct siox_master *smaster) +{ + return dev_get_drvdata(&smaster->dev); +} + +struct siox_master *siox_master_alloc(struct device *dev, size_t size); +static inline void siox_master_put(struct siox_master *smaster) +{ + put_device(&smaster->dev); +} + +int siox_master_register(struct siox_master *smaster); +void siox_master_unregister(struct siox_master *smaster); |