diff options
author | Russell King <rmk+kernel@armlinux.org.uk> | 2019-12-07 16:20:18 +0000 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-01-12 11:24:14 +0100 |
commit | 284c842844f7d12ae619b118b3ecbae6f0ad2e0a (patch) | |
tree | 1e69344dab9aec654b7278a9bc6dab02e8cf98be /kernel | |
parent | 59d8bff61f72d32a67783877c5d7d98cd3c7b8e5 (diff) |
gpiolib: fix up emulated open drain outputs
commit 256efaea1fdc4e38970489197409a26125ee0aaa upstream.
gpiolib has a corner case with open drain outputs that are emulated.
When such outputs are outputting a logic 1, emulation will set the
hardware to input mode, which will cause gpiod_get_direction() to
report that it is in input mode. This is different from the behaviour
with a true open-drain output.
Unify the semantics here.
Cc: <stable@vger.kernel.org>
Suggested-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'kernel')
0 files changed, 0 insertions, 0 deletions