diff options
Diffstat (limited to 'drivers/w1/w1_io.c')
| -rw-r--r-- | drivers/w1/w1_io.c | 26 |
1 files changed, 25 insertions, 1 deletions
diff --git a/drivers/w1/w1_io.c b/drivers/w1/w1_io.c index 5139c25ca96..442bd8bbd4a 100644 --- a/drivers/w1/w1_io.c +++ b/drivers/w1/w1_io.c @@ -238,7 +238,6 @@ EXPORT_SYMBOL_GPL(w1_read_8); * @param dev the master device * @param buf pointer to the data to write * @param len the number of bytes to write - * @return the byte read */ void w1_write_block(struct w1_master *dev, const u8 *buf, int len) { @@ -256,6 +255,31 @@ void w1_write_block(struct w1_master *dev, const u8 *buf, int len) EXPORT_SYMBOL_GPL(w1_write_block); /** + * Touches a series of bytes. + * + * @param dev the master device + * @param buf pointer to the data to write + * @param len the number of bytes to write + */ +void w1_touch_block(struct w1_master *dev, u8 *buf, int len) +{ + int i, j; + u8 tmp; + + for (i = 0; i < len; ++i) { + tmp = 0; + for (j = 0; j < 8; ++j) { + if (j == 7) + w1_pre_write(dev); + tmp |= w1_touch_bit(dev, (buf[i] >> j) & 0x1) << j; + } + + buf[i] = tmp; + } +} +EXPORT_SYMBOL_GPL(w1_touch_block); + +/** * Reads a series of bytes. * * @param dev the master device |