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docs: ipmb: place it at driver-api and convert to ReST 

No new doc should be added at the main Documentation/ directory.

Instead, new docs should be added as ReST files, within the
Kernel documentation body.

Fixes: 51bd6f2915 ("Add support for IPMB driver")
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Message-Id: <d23c36ca65fe6ad56af1723bf70f7a7f4154c410.1561804596.git.mchehab+samsung@kernel.org>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
This commit is contained in:
Mauro Carvalho Chehab 2019-06-29 07:36:46 -03:00 committed by Corey Minyard
parent a88b6d5668
commit ac499fba98
2 changed files with 34 additions and 31 deletions
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1
Documentation/driver-api/index.rst
View File

@ -34,6 +34,7 @@ available subsections can be seen below.
pci/index
spi
i2c
ipmb
i3c/index
hsi
edac

64
Documentation/IPMB.txt → Documentation/driver-api/ipmb.rst
View File

@ -32,11 +32,11 @@ This driver works with the I2C driver and a userspace
program such as OpenIPMI:
1) It is an I2C slave backend driver. So, it defines a callback
function to set the Satellite MC as an I2C slave.
This callback function handles the received IPMI requests.
function to set the Satellite MC as an I2C slave.
This callback function handles the received IPMI requests.
2) It defines the read and write functions to enable a user
space program (such as OpenIPMI) to communicate with the kernel.
space program (such as OpenIPMI) to communicate with the kernel.
Load the IPMB driver
@ -48,34 +48,35 @@ CONFIG_IPMB_DEVICE_INTERFACE=y
1) If you want the driver to be loaded at boot time:
a) Add this entry to your ACPI table, under the appropriate SMBus:
a) Add this entry to your ACPI table, under the appropriate SMBus::
Device (SMB0) // Example SMBus host controller
{
Name (_HID, "<Vendor-Specific HID>") // Vendor-Specific HID
Name (_UID, 0) // Unique ID of particular host controller
:
:
Device (IPMB)
{
Name (_HID, "IPMB0001") // IPMB device interface
Name (_UID, 0) // Unique device identifier
}
}
Device (SMB0) // Example SMBus host controller
{
Name (_HID, "<Vendor-Specific HID>") // Vendor-Specific HID
Name (_UID, 0) // Unique ID of particular host controller
:
:
Device (IPMB)
{
Name (_HID, "IPMB0001") // IPMB device interface
Name (_UID, 0) // Unique device identifier
}
}
b) Example for device tree:
b) Example for device tree::
&i2c2 {
status = "okay";
&i2c2 {
status = "okay";
ipmb@10 {
compatible = "ipmb-dev";
reg = <0x10>;
};
};
ipmb@10 {
compatible = "ipmb-dev";
reg = <0x10>;
};
};
2) Manually from Linux:
modprobe ipmb-dev-int
2) Manually from Linux::
modprobe ipmb-dev-int
Instantiate the device
@ -86,15 +87,16 @@ described in 'Documentation/i2c/instantiating-devices'.
If you have multiple BMCs, each connected to your Satellite MC via
a different I2C bus, you can instantiate a device for each of
those BMCs.
The name of the instantiated device contains the I2C bus number
associated with it as follows:
BMC1 ------ IPMB/I2C bus 1 ---------| /dev/ipmb-1
The name of the instantiated device contains the I2C bus number
associated with it as follows::
BMC1 ------ IPMB/I2C bus 1 ---------| /dev/ipmb-1
Satellite MC
BMC1 ------ IPMB/I2C bus 2 ---------| /dev/ipmb-2
BMC1 ------ IPMB/I2C bus 2 ---------| /dev/ipmb-2
For instance, you can instantiate the ipmb-dev-int device from
user space at the 7 bit address 0x10 on bus 2:
user space at the 7 bit address 0x10 on bus 2::
# echo ipmb-dev 0x1010 > /sys/bus/i2c/devices/i2c-2/new_device