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| author |   Thomas Bogendoerfer <tbogendoerfer@suse.de> | 2019-08-31 10:26:21 +0200 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-09-04 14:34:31 +0200 |
| commit | 74ded38a8e185b57a4362787815c353ac595013c (patch) | |
| tree | 801f3108756dd1ff3719fa02753cddc9596f5cea /include/linux | |
| parent | pcmcia/i82092: Refactored dprintk macro for dev_dbg(). (diff) | |
| download | wireguard-linux-74ded38a8e185b57a4362787815c353ac595013c.tar.xz wireguard-linux-74ded38a8e185b57a4362787815c353ac595013c.zip | |
w1: add 1-wire master driver for IP block found in SGI ASICs
Starting with SGI Origin machines nearly every new SGI ASIC contains
an 1-Wire master. They are used for attaching One-Wire prom devices,
which contain information about part numbers, revision numbers,
serial number etc. and MAC addresses for ethernet interfaces.
This patch adds a master driver to support this IP block.
It also adds an extra field dev_id to struct w1_bus_master, which
could be in used in slave drivers for creating unique device names.
Signed-off-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
Link: https://lore.kernel.org/r/20190831082623.15627-2-tbogendoerfer@suse.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/platform_data/sgi-w1.h | 13 | ||||
| -rw-r--r-- | include/linux/w1.h | 5 |
2 files changed, 18 insertions, 0 deletions
diff --git a/include/linux/platform_data/sgi-w1.h b/include/linux/platform_data/sgi-w1.h new file mode 100644 index 000000000000..e28c8a90ff84 --- /dev/null +++ b/include/linux/platform_data/sgi-w1.h @@ -0,0 +1,13 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * SGI One-Wire (W1) IP + */ + +#ifndef PLATFORM_DATA_SGI_W1_H +#define PLATFORM_DATA_SGI_W1_H + +struct sgi_w1_platform_data { + char dev_id[64]; +}; + +#endif /* PLATFORM_DATA_SGI_W1_H */ diff --git a/include/linux/w1.h b/include/linux/w1.h index e0b5156f78fd..7da0c7588e04 100644 --- a/include/linux/w1.h +++ b/include/linux/w1.h @@ -118,6 +118,9 @@ typedef void (*w1_slave_found_callback)(struct w1_master *, u64); * w1_master* is passed to the slave found callback. * u8 is search_type, W1_SEARCH or W1_ALARM_SEARCH * + * @dev_id: Optional device id string, which w1 slaves could use for + * creating names, which then give a connection to the w1 master + * * Note: read_bit and write_bit are very low level functions and should only * be used with hardware that doesn't really support 1-wire operations, * like a parallel/serial port. @@ -150,6 +153,8 @@ struct w1_bus_master { void (*search)(void *, struct w1_master *, u8, w1_slave_found_callback); + + char *dev_id; }; /** |