[PATCH 1/2] wire: export w1_touch_bit

[Jan Kandziora <jjj@gmx.de>]

The w1_ds28e17 driver from the next part of this patch needs to emit
single-bit read timeslots to the DS28E17. The w1 subsystem already
has this function but it is not exported outside drivers/w1/w1_io.c

This subpatch exports the w1_touch_bit symbol with EXPORT_SYMBOL_GPL,
same as the other exported symbols in drivers/w1/w1_io.c

May be also useful later for writing drivers for other Onewire chips
which do single-bit communication.

Signed-off-by: Jan Kandziora <jjj@gmx.de>
---
 drivers/w1/w1.h    | 1 +
 drivers/w1/w1_io.c | 3 ++-
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/w1/w1.h b/drivers/w1/w1.h
index 129895f..ac8a6a5 100644
--- a/drivers/w1/w1.h
+++ b/drivers/w1/w1.h
@@ -302,6 +302,7 @@ int w1_attach_slave_device(struct w1_master *dev, struct w1_reg_num *rn);
 int w1_slave_detach(struct w1_slave *sl);
 
 u8 w1_triplet(struct w1_master *dev, int bdir);
+u8 w1_touch_bit(struct w1_master *dev, int bit);
 void w1_write_8(struct w1_master *, u8);
 u8 w1_read_8(struct w1_master *);
 int w1_reset_bus(struct w1_master *);
diff --git a/drivers/w1/w1_io.c b/drivers/w1/w1_io.c
index f4bc8c1..1c34f97 100644
--- a/drivers/w1/w1_io.c
+++ b/drivers/w1/w1_io.c
@@ -66,7 +66,7 @@ static u8 w1_read_bit(struct w1_master *dev);
  * @dev:	the master device
  * @bit:	0 - write a 0, 1 - write a 0 read the level
  */
-static u8 w1_touch_bit(struct w1_master *dev, int bit)
+u8 w1_touch_bit(struct w1_master *dev, int bit)
 {
 	if (dev->bus_master->touch_bit)
 		return dev->bus_master->touch_bit(dev->bus_master->data, bit);
@@ -77,6 +77,7 @@ static u8 w1_touch_bit(struct w1_master *dev, int bit)
 		return 0;
 	}
 }
+EXPORT_SYMBOL_GPL(w1_touch_bit);
 
 /**
  * w1_write_bit() - Generates a write-0 or write-1 cycle.
-- 
2.1.4