diff options
| author | Oskar Senft <osk@google.com> | 2019-09-05 17:41:28 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-10-04 16:05:20 +0300 |
| commit | 8d310c9107a2a3f19dc7bb54dd50f70c65ef5409 (patch) | |
| tree | 592efbfd53e0e49e310682cf7909322f09a8524f /Documentation/ABI/stable/sysfs-driver-aspeed-vuart | |
| parent | a8afc193558a42d5df724c84436ae3b2446d8a30 (diff) | |
| download | linux-8d310c9107a2a3f19dc7bb54dd50f70c65ef5409.tar.xz | |
drivers/tty/serial/8250: Make Aspeed VUART SIRQ polarity configurable
Make the SIRQ polarity for Aspeed AST24xx/25xx VUART configurable via
sysfs. This setting need to be changed on specific host platforms
depending on the selected host interface (LPC / eSPI).
The setting is configurable via sysfs rather than device-tree to stay in
line with other related configurable settings.
On AST2500 the VUART SIRQ polarity can be auto-configured by reading a
bit from a configuration register, e.g. the LPC/eSPI interface
configuration bit.
Tested: Verified on TYAN S7106 mainboard.
Signed-off-by: Oskar Senft <osk@google.com>
Link: https://lore.kernel.org/r/20190905144130.220713-1-osk@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'Documentation/ABI/stable/sysfs-driver-aspeed-vuart')
| -rw-r--r-- | Documentation/ABI/stable/sysfs-driver-aspeed-vuart | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/Documentation/ABI/stable/sysfs-driver-aspeed-vuart b/Documentation/ABI/stable/sysfs-driver-aspeed-vuart index 8062953ce77b..950cafc9443a 100644 --- a/Documentation/ABI/stable/sysfs-driver-aspeed-vuart +++ b/Documentation/ABI/stable/sysfs-driver-aspeed-vuart @@ -6,10 +6,19 @@ Description: Configures which IO port the host side of the UART Users: OpenBMC. Proposed changes should be mailed to openbmc@lists.ozlabs.org -What: /sys/bus/platform/drivers/aspeed-vuart*/sirq +What: /sys/bus/platform/drivers/aspeed-vuart/*/sirq Date: April 2017 Contact: Jeremy Kerr <jk@ozlabs.org> Description: Configures which interrupt number the host side of the UART will appear on the host <-> BMC LPC bus. Users: OpenBMC. Proposed changes should be mailed to openbmc@lists.ozlabs.org + +What: /sys/bus/platform/drivers/aspeed-vuart/*/sirq_polarity +Date: July 2019 +Contact: Oskar Senft <osk@google.com> +Description: Configures the polarity of the serial interrupt to the + host via the BMC LPC bus. + Set to 0 for active-low or 1 for active-high. +Users: OpenBMC. Proposed changes should be mailed to + openbmc@lists.ozlabs.org |