1 What: /sys/bus/siox/devices/siox-X/active 2 KernelVersion: 4.16 3 Contact: Thorsten Scherer <t.scherer@eckelmann.de>, Uwe Kleine-König <u.kleine-koenig@pengutronix.de> 4 Description: 5 On reading represents the current state of the bus. If it 6 contains a "0" the bus is stopped and connected devices are 7 expected to not do anything because their watchdog triggered. 8 When the file contains a "1" the bus is operated and periodically 9 does a push-pull cycle to write and read data from the 10 connected devices. 11 12 When writing a "0" or "1" the bus moves to the described state. 13 14 What: /sys/bus/siox/devices/siox-X/device_add 15 KernelVersion: 4.16 16 Contact: Thorsten Scherer <t.scherer@eckelmann.de>, Uwe Kleine-König <u.kleine-koenig@pengutronix.de> 17 Description: 18 Write-only file. Write 19 20 <type> <inbytes> <outbytes> <statustype> 21 22 to add a new device dynamically. <type> is the name that is used to match 23 to a driver (similar to the platform bus). <inbytes> and <outbytes> define 24 the length of the input and output shift register in bytes respectively. 25 26 <statustype> defines the 4 bit device type that is check to identify connection 27 problems. 28 29 The new device is added to the end of the existing chain. 30 31 What: /sys/bus/siox/devices/siox-X/device_remove 32 KernelVersion: 4.16 33 Contact: Thorsten Scherer <t.scherer@eckelmann.de>, Uwe Kleine-König <u.kleine-koenig@pengutronix.de> 34 Description: 35 Write-only file. A single write removes the last device in the siox chain. 36 37 What: /sys/bus/siox/devices/siox-X/poll_interval_ns 38 KernelVersion: 4.16 39 Contact: Thorsten Scherer <t.scherer@eckelmann.de>, Uwe Kleine-König <u.kleine-koenig@pengutronix.de> 40 Description: 41 Defines the interval between two poll cycles in nano seconds. 42 Note this is rounded to jiffies on writing. On reading the current value 43 is returned. 44 45 What: /sys/bus/siox/devices/siox-X-Y/connected 46 KernelVersion: 4.16 47 Contact: Thorsten Scherer <t.scherer@eckelmann.de>, Uwe Kleine-König <u.kleine-koenig@pengutronix.de> 48 Description: 49 Read-only value. "0" means the Yth device on siox bus X isn't "connected" i.e. 50 communication with it is not ensured. "1" signals a working connection. 51 52 What: /sys/bus/siox/devices/siox-X-Y/inbytes 53 KernelVersion: 4.16 54 Contact: Thorsten Scherer <t.scherer@eckelmann.de>, Uwe Kleine-König <u.kleine-koenig@pengutronix.de> 55 Description: 56 Read-only value reporting the inbytes value provided to siox-X/device_add 57 58 What: /sys/bus/siox/devices/siox-X-Y/status_errors 59 KernelVersion: 4.16 60 Contact: Thorsten Scherer <t.scherer@eckelmann.de>, Uwe Kleine-König <u.kleine-koenig@pengutronix.de> 61 Description: 62 Counts the number of time intervals when the read status byte doesn't yield the 63 expected value. 64 65 What: /sys/bus/siox/devices/siox-X-Y/type 66 KernelVersion: 4.16 67 Contact: Thorsten Scherer <t.scherer@eckelmann.de>, Uwe Kleine-König <u.kleine-koenig@pengutronix.de> 68 Description: 69 Read-only value reporting the type value provided to siox-X/device_add. 70 71 What: /sys/bus/siox/devices/siox-X-Y/watchdog 72 KernelVersion: 4.16 73 Contact: Thorsten Scherer <t.scherer@eckelmann.de>, Uwe Kleine-König <u.kleine-koenig@pengutronix.de> 74 Description: 75 Read-only value reporting if the watchdog of the siox device is 76 active. "0" means the watchdog is not active and the device is expected to 77 be operational. "1" means the watchdog keeps the device in reset. 78 79 What: /sys/bus/siox/devices/siox-X-Y/watchdog_errors 80 KernelVersion: 4.16 81 Contact: Thorsten Scherer <t.scherer@eckelmann.de>, Uwe Kleine-König <u.kleine-koenig@pengutronix.de> 82 Description: 83 Read-only value reporting the number to time intervals when the 84 watchdog was active. 85 86 What: /sys/bus/siox/devices/siox-X-Y/outbytes 87 KernelVersion: 4.16 88 Contact: Thorsten Scherer <t.scherer@eckelmann.de>, Uwe Kleine-König <u.kleine-koenig@pengutronix.de> 89 Description: 90 Read-only value reporting the outbytes value provided to siox-X/device_add.
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