diff options
| author | Geert Uytterhoeven <geert+renesas@glider.be> | 2020-08-21 13:14:01 +0200 |
|---|---|---|
| committer | Geert Uytterhoeven <geert+renesas@glider.be> | 2020-09-15 09:37:20 +0200 |
| commit | a4eb6afa7c2c3795ec693cd806fd69593c9ecca7 (patch) | |
| tree | c1a9201dba2a77f045a578bc749f6d452b7cfd95 /Documentation/devicetree | |
| parent | d89a08f52b0dd30d8e13c91886788cd42333dba7 (diff) | |
pinctrl: rza1: Switch to using "output-enable"
For pins requiring software driven IO output operations, the RZ/A1 Pin
Controller uses either the "output-high" or "output-low" DT property to
enable the corresponding output buffer. The actual line value doesn't
matter, as it is ignored.
Commit 425562429d4f3b13 ("pinctrl: generic: Add output-enable property")
introduced a new DT property for this specific use case.
Update the RZ/A1 Pin Controller DT bindings and driver to use this new
property instead. Preserve backwards compatibility with old DTBs in the
driver, as this comes at a very small cost.
Notes:
- The DT binding examples already used the new property,
- There are no upstream users of the old properties.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Chris Brandt <chris.brandt@renesas.com>
Acked-by: Jacopo Mondi <jacopo@jmondi.org>
Acked-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20200821111401.4021-1-geert+renesas@glider.be
Diffstat (limited to 'Documentation/devicetree')
| -rw-r--r-- | Documentation/devicetree/bindings/pinctrl/renesas,rza1-pinctrl.txt | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/Documentation/devicetree/bindings/pinctrl/renesas,rza1-pinctrl.txt b/Documentation/devicetree/bindings/pinctrl/renesas,rza1-pinctrl.txt index fd3696eb36bf..38cdd23d3498 100644 --- a/Documentation/devicetree/bindings/pinctrl/renesas,rza1-pinctrl.txt +++ b/Documentation/devicetree/bindings/pinctrl/renesas,rza1-pinctrl.txt @@ -117,10 +117,9 @@ function or a GPIO controller alternatively. - input-enable: enable input bufer for pins requiring software driven IO input operations. - - output-high: + - output-enable: enable output buffer for pins requiring software driven IO output - operations. output-low can be used alternatively, as line value is - ignored by the driver. + operations. The hardware reference manual specifies when a pin has to be configured to work in bi-directional mode and when the IO direction has to be specified |