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Commit eb8470db authored by Jan Kandziora's avatar Jan Kandziora Committed by Greg Kroah-Hartman
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wire: export w1_touch_bit 



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: default avatarJan Kandziora <jjj@gmx.de>
Acked-by: default avatarEvgeniy Polyakov <zbr@ioremap.net>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent e701c67c

drivers/w1/w1_io.c

+2 −1
Original line number Diff line number Diff line
@@ -58,7 +58,7 @@ 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);
@@ -69,6 +69,7 @@ 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.

include/linux/w1.h

+1 −0
Original line number Diff line number Diff line
@@ -293,6 +293,7 @@ void w1_unregister_family(struct w1_family *family); 
			w1_unregister_family)



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 *);