| Message ID | 20170719201409.5968-1-jjj@gmx.de |
|---|---|
| State | Superseded |
| Headers | show |
Hi 19.07.2017, 23:14, "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> > --- > Changes in v4 against v3 in this subpatch: > - adapted to linux-4.12.0 Greg, please pull this patch series into the tree, it has been adopted to the latest vanilla tree to date. Acked-by: Evgeniy Polyakov <zbr@ioremap.net>
diff --git a/drivers/w1/w1.h b/drivers/w1/w1.h index 758a7a6..e7af855 100644 --- a/drivers/w1/w1.h +++ b/drivers/w1/w1.h @@ -295,6 +295,7 @@ 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 1134e6b..4bb77a1 100644 --- a/drivers/w1/w1_io.c +++ b/drivers/w1/w1_io.c @@ -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.
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> --- Changes in v4 against v3 in this subpatch: - adapted to linux-4.12.0 No changes in v3 against v2,v1 in this subpatch. drivers/w1/w1.h | 1 + drivers/w1/w1_io.c | 3 ++- 2 files changed, 3 insertions(+), 1 deletion(-)