0001 What: /sys/bus/siox/devices/siox-X/active
0002 KernelVersion: 4.16
0003 Contact: Thorsten Scherer <t.scherer@eckelmann.de>, Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
0004 Description:
0005 On reading represents the current state of the bus. If it
0006 contains a "0" the bus is stopped and connected devices are
0007 expected to not do anything because their watchdog triggered.
0008 When the file contains a "1" the bus is operated and periodically
0009 does a push-pull cycle to write and read data from the
0010 connected devices.
0011
0012 When writing a "0" or "1" the bus moves to the described state.
0013
0014 What: /sys/bus/siox/devices/siox-X/device_add
0015 KernelVersion: 4.16
0016 Contact: Thorsten Scherer <t.scherer@eckelmann.de>, Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
0017 Description:
0018 Write-only file. Write
0019
0020 <type> <inbytes> <outbytes> <statustype>
0021
0022 to add a new device dynamically. <type> is the name that is used to match
0023 to a driver (similar to the platform bus). <inbytes> and <outbytes> define
0024 the length of the input and output shift register in bytes respectively.
0025
0026 <statustype> defines the 4 bit device type that is check to identify connection
0027 problems.
0028
0029 The new device is added to the end of the existing chain.
0030
0031 What: /sys/bus/siox/devices/siox-X/device_remove
0032 KernelVersion: 4.16
0033 Contact: Thorsten Scherer <t.scherer@eckelmann.de>, Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
0034 Description:
0035 Write-only file. A single write removes the last device in the siox chain.
0036
0037 What: /sys/bus/siox/devices/siox-X/poll_interval_ns
0038 KernelVersion: 4.16
0039 Contact: Thorsten Scherer <t.scherer@eckelmann.de>, Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
0040 Description:
0041 Defines the interval between two poll cycles in nano seconds.
0042 Note this is rounded to jiffies on writing. On reading the current value
0043 is returned.
0044
0045 What: /sys/bus/siox/devices/siox-X-Y/connected
0046 KernelVersion: 4.16
0047 Contact: Thorsten Scherer <t.scherer@eckelmann.de>, Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
0048 Description:
0049 Read-only value. "0" means the Yth device on siox bus X isn't "connected" i.e.
0050 communication with it is not ensured. "1" signals a working connection.
0051
0052 What: /sys/bus/siox/devices/siox-X-Y/inbytes
0053 KernelVersion: 4.16
0054 Contact: Thorsten Scherer <t.scherer@eckelmann.de>, Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
0055 Description:
0056 Read-only value reporting the inbytes value provided to siox-X/device_add
0057
0058 What: /sys/bus/siox/devices/siox-X-Y/status_errors
0059 KernelVersion: 4.16
0060 Contact: Thorsten Scherer <t.scherer@eckelmann.de>, Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
0061 Description:
0062 Counts the number of time intervals when the read status byte doesn't yield the
0063 expected value.
0064
0065 What: /sys/bus/siox/devices/siox-X-Y/type
0066 KernelVersion: 4.16
0067 Contact: Thorsten Scherer <t.scherer@eckelmann.de>, Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
0068 Description:
0069 Read-only value reporting the type value provided to siox-X/device_add.
0070
0071 What: /sys/bus/siox/devices/siox-X-Y/watchdog
0072 KernelVersion: 4.16
0073 Contact: Thorsten Scherer <t.scherer@eckelmann.de>, Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
0074 Description:
0075 Read-only value reporting if the watchdog of the siox device is
0076 active. "0" means the watchdog is not active and the device is expected to
0077 be operational. "1" means the watchdog keeps the device in reset.
0078
0079 What: /sys/bus/siox/devices/siox-X-Y/watchdog_errors
0080 KernelVersion: 4.16
0081 Contact: Thorsten Scherer <t.scherer@eckelmann.de>, Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
0082 Description:
0083 Read-only value reporting the number to time intervals when the
0084 watchdog was active.
0085
0086 What: /sys/bus/siox/devices/siox-X-Y/outbytes
0087 KernelVersion: 4.16
0088 Contact: Thorsten Scherer <t.scherer@eckelmann.de>, Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
0089 Description:
0090 Read-only value reporting the outbytes value provided to siox-X/device_add.
