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ported r4435 from trunk

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git-svn-id: http://lm-sensors.org/svn/lm-sensors/branches/lm-sensors-3.0.0@4450 7894878c-1315-0410-8ee3-d5d059ff63e0
This commit is contained in:
Mark M. Hoffman
2007-06-16 14:01:05 +00:00
parent b23feefd21
commit 3fd5aba000
1 changed files with 17 additions and 5 deletions
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22
prog/py-smbus/smbusmodule.c
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@@ -1,6 +1,6 @@
/*
* smbusmodule.c - Python bindings for Linux SMBus access through i2c-dev
* Copyright (C) 2005,2006 Mark M. Hoffman <mhoffman@lightlink.com>
* Copyright (C) 2005-2007 Mark M. Hoffman <mhoffman@lightlink.com>
*
* 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
@@ -23,6 +23,15 @@
#include <fcntl.h>
#include <linux/i2c-dev.h>
/*
** These are required to build this module against Linux older than 2.6.23.
*/
#ifndef I2C_SMBUS_I2C_BLOCK_BROKEN
#undef I2C_SMBUS_I2C_BLOCK_DATA
#define I2C_SMBUS_I2C_BLOCK_BROKEN 6
#define I2C_SMBUS_I2C_BLOCK_DATA 8
#endif
PyDoc_STRVAR(SMBus_module_doc,
"This module defines an object type that allows SMBus transactions\n"
"on Linux hosts. The host kernel must have I2C support, I2C device\n"
@@ -486,22 +495,25 @@ SMBus_block_process_call(SMBus *self, PyObject *args)
}
PyDoc_STRVAR(SMBus_read_i2c_block_data_doc,
"read_i2c_block_data(addr, cmd) -> results\n\n"
"read_i2c_block_data(addr, cmd, len=32) -> results\n\n"
"Perform I2C Block Read transaction.\n");
static PyObject *
SMBus_read_i2c_block_data(SMBus *self, PyObject *args)
{
int addr, cmd;
int addr, cmd, len=32;
union i2c_smbus_data data;
if (!PyArg_ParseTuple(args, "ii:read_i2c_block_data", &addr, &cmd))
if (!PyArg_ParseTuple(args, "ii|i:read_i2c_block_data", &addr, &cmd,
&len))
return NULL;
SMBus_SET_ADDR(self, addr);
data.block[0] = len;
/* save a bit of code by calling the access function directly */
if (i2c_smbus_access(self->fd, I2C_SMBUS_READ, (__u8)cmd,
len = 32 ? I2C_SMBUS_I2C_BLOCK_BROKEN:
I2C_SMBUS_I2C_BLOCK_DATA, &data)) {
PyErr_SetFromErrno(PyExc_IOError);
return NULL;
@@ -529,7 +541,7 @@ SMBus_write_i2c_block_data(SMBus *self, PyObject *args)
/* save a bit of code by calling the access function directly */
if (i2c_smbus_access(self->fd, I2C_SMBUS_WRITE, (__u8)cmd,
I2C_SMBUS_I2C_BLOCK_DATA, &data)) {
I2C_SMBUS_I2C_BLOCK_BROKEN, &data)) {
PyErr_SetFromErrno(PyExc_IOError);
return NULL;
}