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| author |   Peter Hurley <peter@hurleysoftware.com> | 2014-09-02 17:39:10 -0400 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-09-08 16:21:35 -0700 |
| commit | a6eec92ec0815ce8ce57e4746e9f717d4146d869 (patch) | |
| tree | 1362131aff20ceb27fb8575d26a30ff081f3c28c /Documentation/devicetree/bindings/serial | |
| parent | tty/serial: samsung: enable usage for 64-bit Exynos platforms (diff) | |
| download | linux-dev-a6eec92ec0815ce8ce57e4746e9f717d4146d869.tar.xz linux-dev-a6eec92ec0815ce8ce57e4746e9f717d4146d869.zip | |
Revert "serial: uart: add hw flow control support configuration"
This reverts commit 06aa82e498c144c7784a6f3d3b55458b272d6146.
This commit purports to enable auto CTS flow control for the 8250
UART driver. However, the 8250 UART driver already supports auto
CTS flow control via UART_CAP_AFE and UART_CAP_EFR. Indeed, this
patch introduces another DT attribute for which an existing firmware
flag already exists ("auto-flow-control"). Furthermore, the use of
UPF_HARD_FLOW requires the UART driver to define .throttle and
.unthrottle methods, neither of which are defined for the 8250 UART
driver (which will result in a NULL ptr dereference). Finally, this patch
supposes to fix existing bugs in the serial core for auto CTS-enabled
hardware, but does not include the class of hardware for which these
bugs exist.
CC: Murali Karicheri <m-karicheri2@ti.com>
CC: Rob Herring <robh+dt@kernel.org>
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'Documentation/devicetree/bindings/serial')
| -rw-r--r-- | Documentation/devicetree/bindings/serial/of-serial.txt | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/Documentation/devicetree/bindings/serial/of-serial.txt b/Documentation/devicetree/bindings/serial/of-serial.txt index 77054772a8f4..1928a3e83cd0 100644 --- a/Documentation/devicetree/bindings/serial/of-serial.txt +++ b/Documentation/devicetree/bindings/serial/of-serial.txt @@ -37,7 +37,6 @@ Optional properties: - auto-flow-control: one way to enable automatic flow control support. The driver is allowed to detect support for the capability even without this property. -- has-hw-flow-control: the hardware has flow control capability. Example: |