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authorEvgeniy Polyakov <zbr@ioremap.net>2009-01-07 18:09:01 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2009-01-08 08:31:13 -0800
commit9be62e0b2fadaf5ffeb32fd1b910ef1fe6bd43db (patch)
tree86d39cd9790a83275380d5f37495d76888c3153b /drivers/w1/w1_io.c
parent610705e780395ef30a1b8e53de150c37381ca31f (diff)
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w1: add touch block command
Writes and returns sampled data back to userspace. Signed-off-by: Evgeniy Polyakov <zbr@ioremap.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/w1/w1_io.c')
-rw-r--r--drivers/w1/w1_io.c26
1 files changed, 25 insertions, 1 deletions
diff --git a/drivers/w1/w1_io.c b/drivers/w1/w1_io.c
index 5139c25ca962..442bd8bbd4a5 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