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i2c: make maa_i2c_read always return the length of the read

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Signed-off-by: Brendan Le Foll <brendan.le.foll@intel.com>
This commit is contained in:
Brendan Le Foll
2014-06-11 10:47:13 +01:00
parent be1248930b
commit ab071e64de
3 changed files with 6 additions and 6 deletions
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4
api/maa/i2c.h
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@@ -85,9 +85,9 @@ maa_result_t maa_i2c_frequency(maa_i2c_context dev, int hz);
* @param dev The i2c context
* @param data pointer to the byte array to read data in to
* @param length max number of bytes to read
* @return Result of operation
* @return length of the read in bytes or 0
*/
maa_result_t maa_i2c_read(maa_i2c_context dev, uint8_t *data, int length);
int maa_i2c_read(maa_i2c_context dev, uint8_t *data, int length);
/**
* Read a single byte from the i2c context

4
api/maa/i2c.hpp
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@@ -93,9 +93,9 @@ class I2c {
*
* @param data Buffer to write into
* @param length Size of read
* @return Result of operation
* @return length of the read or 0 if failed
*/
maa_result_t read(unsigned char * data, int length) {
int read(unsigned char * data, int length) {
return maa_i2c_read(m_i2c, data, length);
}
/**

4
src/i2c/i2c.c
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@@ -78,14 +78,14 @@ maa_i2c_frequency(maa_i2c_context dev, int hz)
return MAA_SUCCESS;
}
maa_result_t
int
maa_i2c_read(maa_i2c_context dev, uint8_t* data, int length)
{
// this is the read(3) syscall not maa_i2c_read()
if (read(dev->fh, data, length) == length) {
return length;
}
return MAA_ERROR_NO_DATA_AVAILABLE;
return 0;
}
uint8_t