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| author | Timur Tabi <timur@codeaurora.org> | 2017-12-20 13:10:32 -0600 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2017-12-21 13:04:35 +0100 |
| commit | 93ebe8636bb0d95e2e711f2a53abbb72a9d9cf8d (patch) | |
| tree | 479035b14d57340c881bd7e0a2f0f26b09f3a367 /tools/gpio | |
| parent | 1ca2a92b2a99323f666f1b669b7484df4bda05e4 (diff) | |
| download | linux-93ebe8636bb0d95e2e711f2a53abbb72a9d9cf8d.tar.gz linux-93ebe8636bb0d95e2e711f2a53abbb72a9d9cf8d.tar.bz2 linux-93ebe8636bb0d95e2e711f2a53abbb72a9d9cf8d.zip | |
pinctrl: qcom: disable GPIO groups with no pins
pinctrl-msm only accepts an array of GPIOs from 0 to n-1, and it expects
each group to support have only one pin (npins == 1).
We can support "sparse" GPIO maps if we allow for some groups to have zero
pins (npins == 0). These pins are "hidden" from the rest of the driver
and gpiolib.
Access to unavailable GPIOs is blocked via a request callback. If the
requested GPIO is unavailable, -EACCES is returned, which prevents
further access to that GPIO.
Signed-off-by: Timur Tabi <timur@codeaurora.org>
Reviewed-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'tools/gpio')
0 files changed, 0 insertions, 0 deletions