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Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 or at your option any later version this program is distributed in the hope that it will be useful but without any warranties or representations without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details you should have received a copy of the gnu general public license along with this program if not write to the free software foundation inc 59 temple place suite 330 boston ma 02111 1307 usa extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 43 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190520170858.826676366@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
79 lines
2.1 KiB
C
79 lines
2.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* Copyright 2011 Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
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*/
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/*
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* infrastructure for devices connected via I2C
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*/
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#ifndef __VIA_AUX_H__
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#define __VIA_AUX_H__
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#include <linux/list.h>
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#include <linux/i2c.h>
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#include <linux/fb.h>
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struct via_aux_bus {
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struct i2c_adapter *adap; /* the I2C device to access the bus */
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struct list_head drivers; /* drivers for devices on this bus */
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};
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struct via_aux_drv {
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struct list_head chain; /* chain to support multiple drivers */
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struct via_aux_bus *bus; /* the I2C bus used */
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u8 addr; /* the I2C slave address */
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const char *name; /* human readable name of the driver */
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void *data; /* private data of this driver */
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void (*cleanup)(struct via_aux_drv *drv);
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const struct fb_videomode* (*get_preferred_mode)
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(struct via_aux_drv *drv);
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};
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struct via_aux_bus *via_aux_probe(struct i2c_adapter *adap);
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void via_aux_free(struct via_aux_bus *bus);
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const struct fb_videomode *via_aux_get_preferred_mode(struct via_aux_bus *bus);
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static inline bool via_aux_add(struct via_aux_drv *drv)
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{
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struct via_aux_drv *data = kmalloc(sizeof(*data), GFP_KERNEL);
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if (!data)
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return false;
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*data = *drv;
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list_add_tail(&data->chain, &data->bus->drivers);
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return true;
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}
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static inline bool via_aux_read(struct via_aux_drv *drv, u8 start, u8 *buf,
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u8 len)
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{
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struct i2c_msg msg[2] = {
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{.addr = drv->addr, .flags = 0, .len = 1, .buf = &start},
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{.addr = drv->addr, .flags = I2C_M_RD, .len = len, .buf = buf} };
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return i2c_transfer(drv->bus->adap, msg, 2) == 2;
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}
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/* probe functions of existing drivers - should only be called in via_aux.c */
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void via_aux_ch7301_probe(struct via_aux_bus *bus);
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void via_aux_edid_probe(struct via_aux_bus *bus);
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void via_aux_sii164_probe(struct via_aux_bus *bus);
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void via_aux_vt1636_probe(struct via_aux_bus *bus);
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void via_aux_vt1632_probe(struct via_aux_bus *bus);
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void via_aux_vt1631_probe(struct via_aux_bus *bus);
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void via_aux_vt1625_probe(struct via_aux_bus *bus);
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void via_aux_vt1622_probe(struct via_aux_bus *bus);
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void via_aux_vt1621_probe(struct via_aux_bus *bus);
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#endif /* __VIA_AUX_H__ */
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