This driver uses the services provided by the BPMP firmware driver to
implement a reset driver based on the MRQ_RESET request.
Acked-by: NPhilipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: NThierry Reding <treding@nvidia.com>

Also remove the RESET_CONTROLLER dependency, this Kconfig file is
included inside the menuconfig already.

Cc: Chen Feng <puck.chen@hisilicon.com>
Reviewed-by: NMasahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: NPhilipp Zabel <p.zabel@pengutronix.de>

Visible only if COMPILE_TEST is enabled, this allows to include the
driver in build tests.

Cc: Moritz Fischer <moritz.fischer@ettus.com>
Cc: Sören Brinkmann <soren.brinkmann@xilinx.com>
Acked-by: NMichal Simek <michal.simek@xilinx.com>
Reviewed-by: NMasahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: NPhilipp Zabel <p.zabel@pengutronix.de>

Visible only if COMPILE_TEST is enabled, this allows to include the
driver in build tests.
Reviewed-by: NMasahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: NPhilipp Zabel <p.zabel@pengutronix.de>

Visible only if COMPILE_TEST is enabled, this allows to include the
driver in build tests.

Cc: Maxime Coquelin <mcoquelin.stm32@gmail.com>
Cc: Gabriel Fernandez <gabriel.fernandez@st.com>
Reviewed-by: NMasahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: NPhilipp Zabel <p.zabel@pengutronix.de>

Visible only if COMPILE_TEST is enabled, this allows to include the
driver in build tests.
Acked-by: NDinh Nguyen <dinguyen@opensource.altera.com>
Reviewed-by: NMasahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: NPhilipp Zabel <p.zabel@pengutronix.de>

Visible only if COMPILE_TEST is enabled, this allows to include the
driver in build tests.

Cc: Damien Horsley <Damien.Horsley@imgtec.com>
Acked-by: NJames Hartley <james.hartley@imgtec.com>
Reviewed-by: NMasahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: NPhilipp Zabel <p.zabel@pengutronix.de>

Visible only if COMPILE_TEST is enabled, this allows to include the
driver in build tests.
Acked-by: NNeil Armstrong <narmstrong@baylibre.com>
Reviewed-by: NMasahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: NPhilipp Zabel <p.zabel@pengutronix.de>

Visible only if COMPILE_TEST is enabled, this allows to include the
driver in build tests.
Acked-by: NJoachim Eastwood <manabian@gmail.com>
Reviewed-by: NMasahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: NPhilipp Zabel <p.zabel@pengutronix.de>

Visible only if COMPILE_TEST is enabled, this allows to include the
driver in build tests.

Cc: Antoine Tenart <antoine.tenart@free-electrons.com>
Cc: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Reviewed-by: NMasahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: NPhilipp Zabel <p.zabel@pengutronix.de>

Visible only if COMPILE_TEST is enabled, this allows to include the
driver in build tests.
Acked-by: NAban Bedel <albeu@free.fr>
Reviewed-by: NMasahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: NPhilipp Zabel <p.zabel@pengutronix.de>

The driver uses readl/writel, so it should include linux/io.h.
Acked-by: NAban Bedel <albeu@free.fr>
Signed-off-by: NPhilipp Zabel <p.zabel@pengutronix.de>

Instead of potentially crashing, dump a backtrace and return -EINVAL if
rstc is NULL or an error code.
Signed-off-by: NPhilipp Zabel <p.zabel@pengutronix.de>

This is the initial commit for UniPhier reset controller driver.
Signed-off-by: NMasahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: NRob Herring <robh@kernel.org>
Signed-off-by: NPhilipp Zabel <p.zabel@pengutronix.de>

The STM32 MCUs family IPs can be reset by accessing some registers
from the RCC block.

The list of available reset lines is documented in the DT bindings.
Signed-off-by: NMaxime Coquelin <mcoquelin.stm32@gmail.com>
Signed-off-by: NGabriel Fernandez <gabriel.fernandez@st.com>
Signed-off-by: NPhilipp Zabel <p.zabel@pengutronix.de>

Since we can just add it to membase once, there is no need to store
modrst_offset separately, and to repeat the addition with every access.
Signed-off-by: NPhilipp Zabel <p.zabel@pengutronix.de>
Tested-by: NDinh Nguyen <dinguyen@opensource.altera.com>

Add a reset-controller driver for performing reset management of
various devices present on the SoC, with the reset registers shared
between devices in a common register memory space. This driver uses
the syscon/regmap frameworks to actually implement the various reset
functionalities needed by the reset consumer devices.
Signed-off-by: NAndrew F. Davis <afd@ti.com>
[s-anna@ti.com: add documentation, syscon name change]
Signed-off-by: NSuman Anna <s-anna@ti.com>
Signed-off-by: NPhilipp Zabel <p.zabel@pengutronix.de>

Add hi6220 media subsystem reset controller.
Signed-off-by: NChen Feng <puck.chen@hisilicon.com>
Signed-off-by: NXia Qing <saberlily.xia@hisilicon.com>
Signed-off-by: NXinliang Liu <xinliang.liu@linaro.org>
Signed-off-by: NPhilipp Zabel <p.zabel@pengutronix.de>

There are two reset controllers in hi6220 SoC:
The peripheral reset controller bits are part of sysctrl registers.
The media reset controller bits are part of mediactrl registers.

So change register access to syscon way.
And rename current reset controller to peripheral one.
Signed-off-by: NChen Feng <puck.chen@hisilicon.com>
Signed-off-by: NXia Qing <saberlily.xia@hisilicon.com>
Signed-off-by: NXinliang Liu <xinliang.liu@linaro.org>
Signed-off-by: NPhilipp Zabel <p.zabel@pengutronix.de>

This patch adds the platform driver for the Amlogic Meson SoC Reset
Controller.

The Meson8b and GXBB SoCs are supported.
Signed-off-by: NNeil Armstrong <narmstrong@baylibre.com>
Signed-off-by: NPhilipp Zabel <p.zabel@pengutronix.de>

Use the brand new devm_reset_controller_register() API to get rid of
the platform driver remove callback.
Signed-off-by: NNeil Armstrong <narmstrong@baylibre.com>
Signed-off-by: NPhilipp Zabel <p.zabel@pengutronix.de>

In "make menuconfig", reset drivers are currently lined up together
with the reset sub-system menu, like this:

    -*- Reset Controller Support  ----
    < > Hi6220 Reset Driver

(It also means, the menu "Reset Controller Support" is always empty.)

"Hi6220 Reset Driver" should go into the sub-menu of the
"Reset Controller Support".
Signed-off-by: NMasahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: NPhilipp Zabel <p.zabel@pengutronix.de>

Use devm_reset_controller_register() for the reset controller
registration and drop the .remove callback.
Signed-off-by: NMasahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: NPhilipp Zabel <p.zabel@pengutronix.de>

Use devm_reset_controller_register() for the reset controller
registration and drop the .remove callback.
Signed-off-by: NMasahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: NPhilipp Zabel <p.zabel@pengutronix.de>

Use devm_reset_controller_register() for the reset controller
registration and drop the .remove callback.
Signed-off-by: NMasahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: NPhilipp Zabel <p.zabel@pengutronix.de>

Use devm_reset_controller_register() for the reset controller
registration and drop the .remove callback.
Signed-off-by: NMasahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: NPhilipp Zabel <p.zabel@pengutronix.de>

Use devm_reset_controller_register() for the reset controller
registration and remove the unregister call from the .remove callback.
Signed-off-by: NMasahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: NPhilipp Zabel <p.zabel@pengutronix.de>

Add a device managed API for reset_controller_register().

This helps in reducing code in .remove callbacks and sometimes
dropping .remove callbacks entirely.
Signed-off-by: NMasahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: NLaxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: NPhilipp Zabel <p.zabel@pengutronix.de>

Add System reset controller driver for Oxford Semiconductor OXNAS SoC
Family.

CC: Ma Haijun <mahaijuns@gmail.com>
Signed-off-by: NNeil Armstrong <narmstrong@baylibre.com>
Signed-off-by: NPhilipp Zabel <p.zabel@pengutronix.de>

Moving the notifier_block into the drivers priv struct allows us
to retrive the priv struct with container_of and remove the
global variables.
Signed-off-by: NJoachim Eastwood <manabian@gmail.com>
Signed-off-by: NPhilipp Zabel <p.zabel@pengutronix.de>

In some SoCs some hw-blocks share a reset control. Add support for this
setup by adding new:

reset_control_get_shared()
devm_reset_control_get_shared()
devm_reset_control_get_shared_by_index()

methods to get a reset_control. Note that this patch omits adding of_
variants, if these are needed later they can be easily added.

This patch also changes the behavior of the existing exclusive
reset_control_get() variants, if these are now called more then once
for the same reset_control they will return -EBUSY. To catch existing
drivers triggering this error (there should not be any) a WARN_ON(1)
is added in this path.

When a reset_control is shared, the behavior of reset_control_assert /
deassert is changed, for shared reset_controls these will work like the
clock-enable/disable and regulator-on/off functions. They will keep a
deassert_count, and only (re-)assert the reset after reset_control_assert
has been called as many times as reset_control_deassert was called.

Calling reset_control_assert without first calling reset_control_deassert
is not allowed on a shared reset control. Calling reset_control_reset is
also not allowed on a shared reset control.
Signed-off-by: NHans de Goede <hdegoede@redhat.com>
Signed-off-by: NPhilipp Zabel <p.zabel@pengutronix.de>

Now that struct reset_control no longer stores the device pointer for
the device calling reset_control_get we can share a single struct
reset_control when multiple calls to reset_control_get are made for
the same reset line (same id / index).

This is a preparation patch for adding support for shared reset lines.
Signed-off-by: NHans de Goede <hdegoede@redhat.com>
Signed-off-by: NPhilipp Zabel <p.zabel@pengutronix.de>

With both the regular, _by_index and _optional variants we already have
quite a few variants of [of_]reset_control_get[_foo], the upcoming
addition of shared reset lines support makes this worse.

This commit changes all the variants into wrappers around common core
functions. For completeness sake this commit also adds a new
devm_get_reset_control_by_index wrapper.
Signed-off-by: NHans de Goede <hdegoede@redhat.com>
Signed-off-by: NPhilipp Zabel <p.zabel@pengutronix.de>

The syscfg_reset_ops structure is never modified. Make it const.
Signed-off-by: NPhilipp Zabel <p.zabel@pengutronix.de>

The zynq_reset_ops structure is never modified. Make it const.
Signed-off-by: NPhilipp Zabel <p.zabel@pengutronix.de>

The socfpga_reset_ops structure is never modified. Make it const.
Signed-off-by: NPhilipp Zabel <p.zabel@pengutronix.de>

The hi6220_reset_ops structure is never modified. Make it const.
Signed-off-by: NPhilipp Zabel <p.zabel@pengutronix.de>

The ath79_reset_ops structure is never modified. Make it const.
Signed-off-by: NPhilipp Zabel <p.zabel@pengutronix.de>
Acked-by: NAlban Bedel <albeu@free.fr>

The lpc18xx_rgu_ops structure is never modified. Make it const.
Signed-off-by: NPhilipp Zabel <p.zabel@pengutronix.de>
Acked-by: NJoachim Eastwood <manabian@gmail.com>

The sunxi_reset_ops structure is never modified. Make it const.
Signed-off-by: NPhilipp Zabel <p.zabel@pengutronix.de>
Acked-by: NMaxime Ripard <maxime.ripard@free-electrons.com>