forked from mirrors/linux
79150ac9f3
Cleanup blank lines, remove wrong links to http://www.gnu.org/copyleft/gpl.html (the driver is licensed under the terms of GPLv2, but the link points to a copy of the GPLv3), and fix the filename reference in ddbridge-i2c.h. [mchehab@kernel.org: removed whitespace changes at the licensing text, as we didn't get any acks from the authors with regards to changing the text] Cc: Ralph Metzler <rjkm@metzlerbros.de> Cc: Manfred Voelkel <mvoelkel@DigitalDevices.de> Signed-off-by: Daniel Scheller <d.scheller@gmx.net> Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
112 lines
3.3 KiB
C
112 lines
3.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/*
|
|
* ddbridge-i2c.h: Digital Devices bridge i2c driver
|
|
*
|
|
* Copyright (C) 2010-2017 Digital Devices GmbH
|
|
* Ralph Metzler <rjkm@metzlerbros.de>
|
|
* Marcus Metzler <mocm@metzlerbros.de>
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* version 2 only, as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*/
|
|
|
|
#ifndef __DDBRIDGE_I2C_H__
|
|
#define __DDBRIDGE_I2C_H__
|
|
|
|
#include <linux/i2c.h>
|
|
|
|
#include "ddbridge.h"
|
|
|
|
/******************************************************************************/
|
|
|
|
void ddb_i2c_release(struct ddb *dev);
|
|
int ddb_i2c_init(struct ddb *dev);
|
|
|
|
/******************************************************************************/
|
|
|
|
static int __maybe_unused i2c_io(struct i2c_adapter *adapter, u8 adr,
|
|
u8 *wbuf, u32 wlen, u8 *rbuf, u32 rlen)
|
|
{
|
|
struct i2c_msg msgs[2] = { { .addr = adr, .flags = 0,
|
|
.buf = wbuf, .len = wlen },
|
|
{ .addr = adr, .flags = I2C_M_RD,
|
|
.buf = rbuf, .len = rlen } };
|
|
|
|
return (i2c_transfer(adapter, msgs, 2) == 2) ? 0 : -1;
|
|
}
|
|
|
|
static int __maybe_unused i2c_write(struct i2c_adapter *adap, u8 adr,
|
|
u8 *data, int len)
|
|
{
|
|
struct i2c_msg msg = { .addr = adr, .flags = 0,
|
|
.buf = data, .len = len };
|
|
|
|
return (i2c_transfer(adap, &msg, 1) == 1) ? 0 : -1;
|
|
}
|
|
|
|
static int __maybe_unused i2c_read(struct i2c_adapter *adapter, u8 adr, u8 *val)
|
|
{
|
|
struct i2c_msg msgs[1] = { { .addr = adr, .flags = I2C_M_RD,
|
|
.buf = val, .len = 1 } };
|
|
|
|
return (i2c_transfer(adapter, msgs, 1) == 1) ? 0 : -1;
|
|
}
|
|
|
|
static int __maybe_unused i2c_read_regs(struct i2c_adapter *adapter,
|
|
u8 adr, u8 reg, u8 *val, u8 len)
|
|
{
|
|
struct i2c_msg msgs[2] = { { .addr = adr, .flags = 0,
|
|
.buf = ®, .len = 1 },
|
|
{ .addr = adr, .flags = I2C_M_RD,
|
|
.buf = val, .len = len } };
|
|
|
|
return (i2c_transfer(adapter, msgs, 2) == 2) ? 0 : -1;
|
|
}
|
|
|
|
static int __maybe_unused i2c_read_regs16(struct i2c_adapter *adapter,
|
|
u8 adr, u16 reg, u8 *val, u8 len)
|
|
{
|
|
u8 msg[2] = { reg >> 8, reg & 0xff };
|
|
struct i2c_msg msgs[2] = { { .addr = adr, .flags = 0,
|
|
.buf = msg, .len = 2 },
|
|
{ .addr = adr, .flags = I2C_M_RD,
|
|
.buf = val, .len = len } };
|
|
|
|
return (i2c_transfer(adapter, msgs, 2) == 2) ? 0 : -1;
|
|
}
|
|
|
|
static int __maybe_unused i2c_write_reg16(struct i2c_adapter *adap,
|
|
u8 adr, u16 reg, u8 val)
|
|
{
|
|
u8 msg[3] = { reg >> 8, reg & 0xff, val };
|
|
|
|
return i2c_write(adap, adr, msg, 3);
|
|
}
|
|
|
|
static int __maybe_unused i2c_write_reg(struct i2c_adapter *adap,
|
|
u8 adr, u8 reg, u8 val)
|
|
{
|
|
u8 msg[2] = { reg, val };
|
|
|
|
return i2c_write(adap, adr, msg, 2);
|
|
}
|
|
|
|
static int __maybe_unused i2c_read_reg16(struct i2c_adapter *adapter,
|
|
u8 adr, u16 reg, u8 *val)
|
|
{
|
|
return i2c_read_regs16(adapter, adr, reg, val, 1);
|
|
}
|
|
|
|
static int __maybe_unused i2c_read_reg(struct i2c_adapter *adapter,
|
|
u8 adr, u8 reg, u8 *val)
|
|
{
|
|
return i2c_read_regs(adapter, adr, reg, val, 1);
|
|
}
|
|
|
|
#endif /* __DDBRIDGE_I2C_H__ */
|