88 lines
3.8 KiB
Plaintext
88 lines
3.8 KiB
Plaintext
What: /sys/bus/siox/devices/siox-X/active
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KernelVersion: 4.16
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Contact: Gavin Schenk <g.schenk@eckelmann.de>, Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
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Description:
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On reading represents the current state of the bus. If it
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contains a "0" the bus is stopped and connected devices are
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expected to not do anything because their watchdog triggered.
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When the file contains a "1" the bus is operated and periodically
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does a push-pull cycle to write and read data from the
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connected devices.
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When writing a "0" or "1" the bus moves to the described state.
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What: /sys/bus/siox/devices/siox-X/device_add
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KernelVersion: 4.16
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Contact: Gavin Schenk <g.schenk@eckelmann.de>, Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
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Description:
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Write-only file. Write
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<type> <inbytes> <outbytes> <statustype>
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to add a new device dynamically. <type> is the name that is used to match
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to a driver (similar to the platform bus). <inbytes> and <outbytes> define
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the length of the input and output shift register in bytes respectively.
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<statustype> defines the 4 bit device type that is check to identify connection
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problems.
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The new device is added to the end of the existing chain.
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What: /sys/bus/siox/devices/siox-X/device_remove
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KernelVersion: 4.16
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Contact: Gavin Schenk <g.schenk@eckelmann.de>, Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
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Description:
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Write-only file. A single write removes the last device in the siox chain.
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What: /sys/bus/siox/devices/siox-X/poll_interval_ns
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KernelVersion: 4.16
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Contact: Gavin Schenk <g.schenk@eckelmann.de>, Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
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Description:
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Defines the interval between two poll cycles in nano seconds.
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Note this is rounded to jiffies on writing. On reading the current value
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is returned.
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What: /sys/bus/siox/devices/siox-X-Y/connected
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KernelVersion: 4.16
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Contact: Gavin Schenk <g.schenk@eckelmann.de>, Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
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Description:
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Read-only value. "0" means the Yth device on siox bus X isn't "connected" i.e.
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communication with it is not ensured. "1" signals a working connection.
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What: /sys/bus/siox/devices/siox-X-Y/inbytes
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KernelVersion: 4.16
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Contact: Gavin Schenk <g.schenk@eckelmann.de>, Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
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Description:
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Read-only value reporting the inbytes value provided to siox-X/device_add
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What: /sys/bus/siox/devices/siox-X-Y/status_errors
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KernelVersion: 4.16
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Contact: Gavin Schenk <g.schenk@eckelmann.de>, Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
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Description:
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Counts the number of time intervals when the read status byte doesn't yield the
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expected value.
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What: /sys/bus/siox/devices/siox-X-Y/type
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KernelVersion: 4.16
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Contact: Gavin Schenk <g.schenk@eckelmann.de>, Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
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Description:
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Read-only value reporting the type value provided to siox-X/device_add.
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What: /sys/bus/siox/devices/siox-X-Y/watchdog
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KernelVersion: 4.16
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Contact: Gavin Schenk <g.schenk@eckelmann.de>, Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
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Description:
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Read-only value reporting if the watchdog of the siox device is
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active. "0" means the watchdog is not active and the device is expected to
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be operational. "1" means the watchdog keeps the device in reset.
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What: /sys/bus/siox/devices/siox-X-Y/watchdog_errors
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KernelVersion: 4.16
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Contact: Gavin Schenk <g.schenk@eckelmann.de>, Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
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Description:
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Read-only value reporting the number to time intervals when the
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watchdog was active.
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What: /sys/bus/siox/devices/siox-X-Y/outbytes
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KernelVersion: 4.16
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Contact: Gavin Schenk <g.schenk@eckelmann.de>, Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
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Description:
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Read-only value reporting the outbytes value provided to siox-X/device_add.
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