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author | Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> | 2012-11-02 10:36:50 +0100 |
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committer | Sascha Hauer <s.hauer@pengutronix.de> | 2012-11-15 08:34:53 +0100 |
commit | 334e8f3b62f922370723b911c9afda7e6cd5d27d (patch) | |
tree | 7246d7b2e82e0d19482a7b86543d20e08d4d71d3 /include/i2c | |
parent | 0e9a078d204d9404b4eb57db11f89d57eb961f00 (diff) | |
download | barebox-334e8f3b62f922370723b911c9afda7e6cd5d27d.tar.gz barebox-334e8f3b62f922370723b911c9afda7e6cd5d27d.tar.xz |
i2c: add i2c algo bit support
This is needed for i2c-gpio support
Based on linux 3.7-rc2
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'include/i2c')
-rw-r--r-- | include/i2c/i2c-algo-bit.h | 55 | ||||
-rw-r--r-- | include/i2c/i2c.h | 2 |
2 files changed, 57 insertions, 0 deletions
diff --git a/include/i2c/i2c-algo-bit.h b/include/i2c/i2c-algo-bit.h new file mode 100644 index 0000000000..1b72219687 --- /dev/null +++ b/include/i2c/i2c-algo-bit.h @@ -0,0 +1,55 @@ +/* ------------------------------------------------------------------------- */ +/* i2c-algo-bit.h i2c driver algorithms for bit-shift adapters */ +/* ------------------------------------------------------------------------- */ +/* Copyright (C) 1995-99 Simon G. Vogl + + 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 of the License, or + (at your option) any later version. + + 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. + + 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., 51 Franklin Street, Fifth Floor, Boston, + MA 02110-1301 USA. */ +/* ------------------------------------------------------------------------- */ + +/* With some changes from Kyösti Mälkki <kmalkki@cc.hut.fi> and even + Frodo Looijaard <frodol@dds.nl> */ + +#ifndef _LINUX_I2C_ALGO_BIT_H +#define _LINUX_I2C_ALGO_BIT_H + +/* --- Defines for bit-adapters --------------------------------------- */ +/* + * This struct contains the hw-dependent functions of bit-style adapters to + * manipulate the line states, and to init any hw-specific features. This is + * only used if you have more than one hw-type of adapter running. + */ +struct i2c_algo_bit_data { + void *data; /* private data for lowlevel routines */ + void (*setsda) (void *data, int state); + void (*setscl) (void *data, int state); + int (*getsda) (void *data); + int (*getscl) (void *data); + int (*pre_xfer) (struct i2c_adapter *); + void (*post_xfer) (struct i2c_adapter *); + + /* local settings */ + int udelay; /* half clock cycle time in us, + minimum 2 us for fast-mode I2C, + minimum 5 us for standard-mode I2C and SMBus, + maximum 50 us for SMBus */ + int timeout_ms; /* in ms */ +}; + +int i2c_bit_add_bus(struct i2c_adapter *); +int i2c_bit_add_numbered_bus(struct i2c_adapter *); +extern const struct i2c_algorithm i2c_bit_algo; + +#endif /* _LINUX_I2C_ALGO_BIT_H */ diff --git a/include/i2c/i2c.h b/include/i2c/i2c.h index 5021dd4e51..b05911909b 100644 --- a/include/i2c/i2c.h +++ b/include/i2c/i2c.h @@ -70,6 +70,8 @@ struct i2c_adapter { int nr; /* bus number */ int (*master_xfer)(struct i2c_adapter *adap, struct i2c_msg *msgs, int num); struct list_head list; + int retries; + void *algo_data; }; |