diff options
Diffstat (limited to 'drivers/w1/w1_io.c')
| -rw-r--r-- | drivers/w1/w1_io.c | 18 |
1 files changed, 5 insertions, 13 deletions
diff --git a/drivers/w1/w1_io.c b/drivers/w1/w1_io.c index d191e1f80579..db3c9522a8a2 100644 --- a/drivers/w1/w1_io.c +++ b/drivers/w1/w1_io.c @@ -1,15 +1,6 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * Copyright (c) 2004 Evgeniy Polyakov <zbr@ioremap.net> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. */ #include <asm/io.h> @@ -58,7 +49,7 @@ 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 +60,7 @@ 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. @@ -193,6 +185,7 @@ static u8 w1_read_bit(struct w1_master *dev) * bit 0 = id_bit * bit 1 = comp_bit * bit 2 = dir_taken + * * If both bits 0 & 1 are set, the search should be restarted. * * Return: bit fields - see above @@ -430,8 +423,7 @@ int w1_reset_resume_command(struct w1_master *dev) if (w1_reset_bus(dev)) return -1; - /* This will make only the last matched slave perform a skip ROM. */ - w1_write_8(dev, W1_RESUME_CMD); + w1_write_8(dev, dev->slave_count > 1 ? W1_RESUME_CMD : W1_SKIP_ROM); return 0; } EXPORT_SYMBOL_GPL(w1_reset_resume_command); |