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* iio: proximity: cros_ec_mkbp: Convert to platform remove callback returning voidUwe Kleine-König2023-09-231-4/+2
| | | | | | | | | | | | | | | | | | | The .remove() callback for a platform driver returns an int which makes many driver authors wrongly assume it's possible to do error handling by returning an error code. However the value returned is ignored (apart from emitting a warning) and this typically results in resource leaks. To improve here there is a quest to make the remove callback return void. In the first step of this quest all drivers are converted to .remove_new() which already returns void. Eventually after all drivers are converted, .remove_new() will be renamed to .remove(). Trivially convert this driver from always returning zero in the remove callback to the void returning variant. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Reviewed-by: Tzung-Bi Shih <tzungbi@kernel.org> Link: https://lore.kernel.org/r/20230919174931.1417681-46-u.kleine-koenig@pengutronix.de Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
* iio: proximity: cros_ec_mkbp: Switch to DEFINE_SIMPLE_DEV_PM_OPS() and ↵Jonathan Cameron2022-07-181-4/+4
| | | | | | | | | | | | | | | | pm_sleep_ptr() Using these newer macros allows the compiler to remove the unused structure and functions when !CONFIG_PM_SLEEP + removes the need to mark pm functions __maybe_unused. Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Cc: Enric Balletbo i Serra <enric.balletbo@collabora.com> Cc: Gwendal Grignou <gwendal@chromium.org> Cc: Stephen Boyd <swboyd@chromium.org> Reviewed-by: Gwendal Grignou <gwendal@chromium.org> Reviewed-by: Paul Cercueil <paul@crapouillou.net> Link: https://lore.kernel.org/r/20220621202719.13644-25-jic23@kernel.org
* iio: proximity: Add a ChromeOS EC MKBP proximity driverStephen Boyd2021-03-251-0/+271
Add support for a ChromeOS EC proximity driver that exposes a "front" proximity sensor via the IIO subsystem. The EC decides when front proximity is near and sets an MKBP switch 'EC_MKBP_FRONT_PROXIMITY' to notify the kernel of proximity. Similarly, when proximity detects something far away it sets the switch bit to 0. For now this driver exposes a single sensor, but it could be expanded in the future via more MKBP bits if desired. Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com> Cc: Benson Leung <bleung@chromium.org> Cc: Guenter Roeck <groeck@chromium.org> Cc: Douglas Anderson <dianders@chromium.org> Cc: Gwendal Grignou <gwendal@chromium.org> Reviewed-by: Enric Balletbo i Serra <enric.balletbo@collabora.com> Signed-off-by: Stephen Boyd <swboyd@chromium.org> Reviewed-by: Gwendal Grignou <gwendal@chromium.org> Link: https://lore.kernel.org/r/20210211024601.1963379-4-swboyd@chromium.org Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>