wire: export w1_touch_bit (eb8470db) · Commits · 戴 / test

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> Acked-by:

Evgeniy Polyakov <zbr@ioremap.net> Signed-off-by:

Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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 *);

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