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path: root/include/linux/reset.h
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2014-10-20reset: add reset_control_status helper functionDinh Nguyen1-0/+7
There are cases where a system will want to read a reset status bit before doing any other toggling. Add a reset_control_status helper function to the reset controller API. Signed-off-by: Dinh Nguyen <dinguyen@opensource.altera.com> Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
2014-04-14reset: Add of_reset_control_get to reset.hHans de Goede1-0/+10
of_reset_control_get is not declared static in drivers/reset/core.c, which is correct as we want to use it elsewhere too. But it does not have a protype declared anywhere under include/linux. Add a prototype / stub for it to linux/reset.h to fix this. Reviewed-by: Josh Triplett <josh@joshtriplett.org> Signed-off-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
2014-03-09reset: Add optional resets and stubsPhilipp Zabel1-5/+64
This patch adds device_reset_optional and (devm_)reset_control_get_optional variants that drivers can use to indicate they can function without control over the reset line. For those functions, stubs are added so the drivers can be compiled with CONFIG_RESET_CONTROLLER disabled. Also, device_reset is annotated with __must_check. Drivers ignoring the return value should use device_reset_optional instead. Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de> Reviewed-by: Maxime Ripard <maxime.ripard@free-electrons.com> Reviewed-by: Marek Vasut <marex@denx.de> Acked-by: Wolfram Sang <wsa@the-dreams.de>
2014-02-03reset: Add of_reset_control_getMaxime Ripard1-0/+4
In some cases, you might need to deassert from reset an hardware block that doesn't associated to a struct device (CPUs, timers, etc.). Add a small helper to retrieve the reset controller from the device tree without the need to pass a struct device. Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com> Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
2013-04-12reset: Add reset controller APIPhilipp Zabel1-0/+17
This adds a simple API for devices to request being reset by separate reset controller hardware and implements the reset signal device tree binding. Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de> Reviewed-by: Stephen Warren <swarren@nvidia.com> Reviewed-by: Shawn Guo <shawn.guo@linaro.org> Reviewed-by: Marek Vasut <marex@denx.de> Reviewed-by: Pavel Machek <pavel@ucw.cz>