forked from ~ljy/RK356X_SDK_RELEASE
kernel/Documentation/ABI/testing/sysfs-bus-siox
.. .. @@ -1,6 +1,6 @@ 1 1 What: /sys/bus/siox/devices/siox-X/active 2 2 KernelVersion: 4.16 3 3 4 4 Description: 5 5 On reading represents the current state of the bus. If it 6 6 contains a "0" the bus is stopped and connected devices are .. .. @@ -8,11 +8,12 @@ 8 8 When the file contains a "1" the bus is operated and periodically 9 9 does a push-pull cycle to write and read data from the 10 10 connected devices. 11 11 12 When writing a "0" or "1" the bus moves to the described state. 12 13 13 14 What: /sys/bus/siox/devices/siox-X/device_add 14 15 KernelVersion: 4.16 15 16 16 17 Description: 17 18 Write-only file. Write 18 19 .. .. @@ -21,19 +22,21 @@ 21 22 to add a new device dynamically. <type> is the name that is used to match 22 23 to a driver (similar to the platform bus). <inbytes> and <outbytes> define 23 24 the length of the input and output shift register in bytes respectively. 25 24 26 <statustype> defines the 4 bit device type that is check to identify connection 25 27 problems. 28 26 29 The new device is added to the end of the existing chain. 27 30 28 31 What: /sys/bus/siox/devices/siox-X/device_remove 29 32 KernelVersion: 4.16 30 33 31 34 Description: 32 35 Write-only file. A single write removes the last device in the siox chain. 33 36 34 37 What: /sys/bus/siox/devices/siox-X/poll_interval_ns 35 38 KernelVersion: 4.16 36 39 37 40 Description: 38 41 Defines the interval between two poll cycles in nano seconds. 39 42 Note this is rounded to jiffies on writing. On reading the current value .. .. @@ -41,33 +44,33 @@ 41 44 42 45 What: /sys/bus/siox/devices/siox-X-Y/connected 43 46 KernelVersion: 4.16 44 47 45 48 Description: 46 49 Read-only value. "0" means the Yth device on siox bus X isn't "connected" i.e. 47 50 communication with it is not ensured. "1" signals a working connection. 48 51 49 52 What: /sys/bus/siox/devices/siox-X-Y/inbytes 50 53 KernelVersion: 4.16 51 54 52 55 Description: 53 56 Read-only value reporting the inbytes value provided to siox-X/device_add 54 57 55 58 What: /sys/bus/siox/devices/siox-X-Y/status_errors 56 59 KernelVersion: 4.16 57 60 58 61 Description: 59 62 Counts the number of time intervals when the read status byte doesn't yield the 60 63 expected value. 61 64 62 65 What: /sys/bus/siox/devices/siox-X-Y/type 63 66 KernelVersion: 4.16 64 67 65 68 Description: 66 69 Read-only value reporting the type value provided to siox-X/device_add. 67 70 68 71 What: /sys/bus/siox/devices/siox-X-Y/watchdog 69 72 KernelVersion: 4.16 70 73 71 74 Description: 72 75 Read-only value reporting if the watchdog of the siox device is 73 76 active. "0" means the watchdog is not active and the device is expected to .. .. @@ -75,13 +78,13 @@ 75 78 76 79 What: /sys/bus/siox/devices/siox-X-Y/watchdog_errors 77 80 KernelVersion: 4.16 78 81 79 82 Description: 80 83 Read-only value reporting the number to time intervals when the 81 84 watchdog was active. 82 85 83 86 What: /sys/bus/siox/devices/siox-X-Y/outbytes 84 87 KernelVersion: 4.16 85 88 86 89 Description: 87 90 Read-only value reporting the outbytes value provided to siox-X/device_add.
