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path: root/drivers/reset
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2016-06-30reset: add TI SYSCON based reset driverAndrew F. Davis3-0/+248
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: Andrew F. Davis <afd@ti.com> [s-anna@ti.com: add documentation, syscon name change] Signed-off-by: Suman Anna <s-anna@ti.com> Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
2016-06-30reset: hisilicon: Add hi6220 media subsystem reset supportXinliang Liu1-2/+47
Add hi6220 media subsystem reset controller. Signed-off-by: Chen Feng <puck.chen@hisilicon.com> Signed-off-by: Xia Qing <saberlily.xia@hisilicon.com> Signed-off-by: Xinliang Liu <xinliang.liu@linaro.org> Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
2016-06-30reset: hisilicon: Change to syscon register accessChen Feng1-40/+45
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: Chen Feng <puck.chen@hisilicon.com> Signed-off-by: Xia Qing <saberlily.xia@hisilicon.com> Signed-off-by: Xinliang Liu <xinliang.liu@linaro.org> Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
2016-06-01reset: Add support for the Amlogic Meson SoC Reset ControllerNeil Armstrong2-0/+137
This patch adds the platform driver for the Amlogic Meson SoC Reset Controller. The Meson8b and GXBB SoCs are supported. Signed-off-by: Neil Armstrong <narmstrong@baylibre.com> Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
2016-05-30reset: oxnas: Use devm register API and get rid of platform removeNeil Armstrong1-11/+1
Use the brand new devm_reset_controller_register() API to get rid of the platform driver remove callback. Signed-off-by: Neil Armstrong <narmstrong@baylibre.com> Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
2016-05-30reset: fix Kconfig menu to include reset drivers in sub-menuMasahiro Yamada2-1/+4
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: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
2016-05-30reset: zynq: use devm_reset_controller_register()Masahiro Yamada1-11/+1
Use devm_reset_controller_register() for the reset controller registration and drop the .remove callback. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
2016-05-30reset: socfpga: use devm_reset_controller_register()Masahiro Yamada1-11/+1
Use devm_reset_controller_register() for the reset controller registration and drop the .remove callback. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
2016-05-30reset: sunxi: use devm_reset_controller_register()Masahiro Yamada1-11/+1
Use devm_reset_controller_register() for the reset controller registration and drop the .remove callback. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
2016-05-30reset: pistachio: use devm_reset_controller_register()Masahiro Yamada1-11/+1
Use devm_reset_controller_register() for the reset controller registration and drop the .remove callback. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
2016-05-30reset: ath79: use devm_reset_controller_register()Masahiro Yamada1-2/+1
Use devm_reset_controller_register() for the reset controller registration and remove the unregister call from the .remove callback. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
2016-05-30reset: add devm_reset_controller_register APIMasahiro Yamada1-0/+37
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: Masahiro Yamada <yamada.masahiro@socionext.com> Acked-by: Laxman Dewangan <ldewangan@nvidia.com> Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
2016-04-01reset: Add Oxford Semiconductor Reset Controller driverNeil Armstrong3-0/+140
Add System reset controller driver for Oxford Semiconductor OXNAS SoC Family. CC: Ma Haijun <mahaijuns@gmail.com> Signed-off-by: Neil Armstrong <narmstrong@baylibre.com> Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
2016-03-30reset: lpc18xx: get rid of global variables for restart notifierJoachim Eastwood1-12/+10
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: Joachim Eastwood <manabian@gmail.com> Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
2016-03-30reset: Add support for shared reset controlsHans de Goede1-11/+48
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: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
2016-03-30reset: Share struct reset_control between reset_control_get callsHans de Goede1-21/+63
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: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
2016-03-30reset: Make [of_]reset_control_get[_foo] functions wrappersHans de Goede1-67/+17
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: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
2016-02-10reset: sti: Make reset_control_ops constPhilipp Zabel1-1/+1
The syscfg_reset_ops structure is never modified. Make it const. Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
2016-02-10reset: zynq: Make reset_control_ops constPhilipp Zabel1-1/+1
The zynq_reset_ops structure is never modified. Make it const. Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
2016-02-10reset: socfpga: Make reset_control_ops constPhilipp Zabel1-1/+1
The socfpga_reset_ops structure is never modified. Make it const. Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
2016-02-10reset: hi6220: Make reset_control_ops constPhilipp Zabel1-1/+1
The hi6220_reset_ops structure is never modified. Make it const. Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
2016-02-10reset: ath79: Make reset_control_ops constPhilipp Zabel1-1/+1
The ath79_reset_ops structure is never modified. Make it const. Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de> Acked-by: Alban Bedel <albeu@free.fr>
2016-02-08reset: lpc18xx: Make reset_control_ops constPhilipp Zabel1-1/+1
The lpc18xx_rgu_ops structure is never modified. Make it const. Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de> Acked-by: Joachim Eastwood <manabian@gmail.com>
2016-02-08reset: sunxi: Make reset_control_ops constPhilipp Zabel1-1/+1
The sunxi_reset_ops structure is never modified. Make it const. Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de> Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
2016-02-08reset: img: Make reset_control_ops constPhilipp Zabel1-1/+1
The pistachio_reset_ops structure is never modified. Make it const. Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de> Acked-by: James Hartley <james.hartley@imgtec.com>
2016-02-08reset: berlin: Make reset_control_ops constPhilipp Zabel1-1/+1
The berlin_reset_ops structure is never modified. Make it const. Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de> Acked-by: Antoine Tenart <antoine.tenart@free-electrons.com>
2016-02-05reset: berlin: drop DT cell size checkPhilipp Zabel1-3/+0
Now that the DT cell size check has been moved to the core, there is no need to check again. Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
2016-02-05reset: img: Add Pistachio reset controller driverDamien Horsley2-0/+155
Add reset controller driver for Pistachio SoC Signed-off-by: Damien Horsley <Damien.Horsley@imgtec.com> Signed-off-by: James Hartley <james.hartley@imgtec.com> Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
2016-01-25reset: hisilicon: check return value of reset_controller_register()Masahiro Yamada1-3/+1
The newly added hisilicon reset driver missed the subsystem-wide fixup by commit d1f15aa09558 ("reset: check return value of reset_controller_register()"). So fix it now. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
2016-01-25reset: Move DT cell size check to the coreMaxime Ripard1-3/+5
The core currently doesn't check that the DT cell size matches what the driver declares, which means that every xlate function needs to duplicate that check. Make sure that of_reset_control_get checks for this to avoid duplication and errors. Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com> Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
2016-01-25reset: remove unnecessary local variable initialization from ↵Philipp Zabel1-1/+1
of_reset_control_get_by_index There is no need to initialize rstc, as it is unconditionally assigned the return value of a kzalloc call before use. Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
2015-12-12reset: hi6220: fix modular buildArnd Bergmann1-0/+1
We need to include <linux/module.h> to build the driver as a loadable module: drivers/reset/hisilicon/hi6220_reset.c:108:1: warning: data definition has no type or storage class postcore_initcall(hi6220_reset_init); Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2015-11-25reset: ath79: Add system restart supportAlban Bedel1-1/+29
Add a system restart handler that use the FULL_CHIP_RESET bit of the reset controller. Signed-off-by: Alban Bedel <albeu@free.fr> Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
2015-11-20reset: hi6220: Reset driver for hisilicon hi6220 SoCChen Feng5-0/+116
Add reset driver for hi6220-hikey board,this driver supply deassert of IP on hi6220 SoC. Signed-off-by: Chen Feng <puck.chen@hisilicon.com> Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
2015-11-18reset: remove unused device pointer from struct reset_controlPhilipp Zabel1-8/+1
Commit 0c5b2b915a58 ("reset: Mark function as static and remove unused function in core.c") removed the only user of the device pointer in struct reset_control. As it is now unused, remove it. Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
2015-11-16reset: check return value of reset_controller_register()Masahiro Yamada4-9/+4
Currently, reset_controller_register() always return 0, but it would be better to check its return code. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Acked-by: Sören Brinkmann <soren.brinkmann@xilinx.com> Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
2015-11-16reset: remove redundant $(CONFIG_RESET_CONTROLLER) from MakefileMasahiro Yamada1-1/+1
The directory drivers/reset/ is guarded by CONFIG_RESET_CONTROLLER in driver/Makefile. CONFIG_RESET_CONTROLLER is boolean, so it always evaluates to 'y' in drivers/reset/Makefile. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
2015-11-16reset: use ENOTSUPP instead of ENOSYSPhilipp Zabel1-4/+4
ENOSYS is reserved to report invalid syscalls to userspace. Consistently return ENOTSUPP to indicate that the driver doesn't support the functionality or the reset framework is not enabled at all. Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
2015-11-16reset: sunxi: mark the of_device_id array as __initconstPhilipp Zabel1-1/+1
Since this array is static const, it should be marked as __initconst. Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de> Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
2015-11-16reset: sti: add a missing blank line after declarationPhilipp Zabel1-1/+3
This just fixes a checkpatch warning, no functional change. Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de> Acked-by: Maxime Coquelin <maxime.coquelin@st.com>
2015-11-16reset: sti: Provide ops .status() call-backLee Jones1-0/+23
Signed-off-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
2015-11-16reset: sti: Add support for resetting co-processorsLee Jones1-0/+5
Signed-off-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
2015-11-16reset: Fix of_reset_control_get() for consistent return valuesAlban Bedel1-1/+4
When of_reset_control_get() is called without connection ID it returns -ENOENT when the 'resets' property doesn't exists or is an empty entry. However when a connection ID is given it returns -EINVAL when the 'resets' property doesn't exists or the requested name can't be found. This is because the error code returned by of_property_match_string() is just passed down as an index to of_parse_phandle_with_args(), which then returns -EINVAL. To get a consistent return value with both code paths we must return -ENOENT when of_property_match_string() fails. Signed-off-by: Alban Bedel <albeu@free.fr> Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
2015-11-16reset: add of_reset_control_get_by_index()Vince Hsu1-11/+29
Add of_reset_control_get_by_index() to allow the drivers to get reset device without knowing its name. Signed-off-by: Vince Hsu <vinceh@nvidia.com> [jonathanh@nvidia.com: Updated stub function to return -ENOTSUPP instead of -ENOSYS which should only be used for system calls.] Signed-off-by: Jon Hunter <jonathanh@nvidia.com> Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
2015-09-01reset: ath79: Fix missing spin_lock_initAxel Lin1-0/+1
Signed-off-by: Axel Lin <axel.lin@ingics.com> Acked-by: Alban Bedel <albeu@free.fr> Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
2015-08-16Merge branch 'reset/ath79' into reset/nextPhilipp Zabel2-0/+129
2015-08-04reset: reset-zynq: Adding support for Xilinx Zynq reset controller.Moritz Fischer2-0/+156
This adds a reset controller driver to control the Xilinx Zynq AP-SoC's various resets. Signed-off-by: Moritz Fischer <moritz.fischer@ettus.com> Reviewed-by: Michal Simek <michal.simek@xilinx.com> Acked-by: Sören Brinkmann <soren.brinkmann@xilinx.com> Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
2015-08-04reset: Add a driver for the reset controller on the AR71XX/AR9XXXAlban Bedel2-0/+129
The AR71XX/AR9XXX SoC have a simple reset controller with one bit per reset line. Signed-off-by: Alban Bedel <albeu@free.fr> Acked-by: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
2015-08-03reset: socfpga: Update reset-socfpga to read the altr,modrst-offset propertyDinh Nguyen1-6/+13
In order for the Arria10 to be able to re-use the reset driver for SoCFPGA Cyclone5/Arria5, we need to read the 'altr,modrst-offset' property from the device tree entry. The 'altr,modrst-offset' property is the first register into the reset manager that is used for bringing peripherals out of reset. The driver assumes a modrst-offset of 0x10 in order to support legacy Cyclone5/Arria5 hardware. Signed-off-by: Dinh Nguyen <dinguyen@opensource.altera.com>
2015-08-03reset: add driver for lpc18xx rguJoachim Eastwood2-0/+259
Add reset driver for the Reset Generation Unit (RGU) found on NXP LPC18xx and LPC43xx devies. This reset controller features up to 64 reset lines connected to different blocks and peripheral in the SoC. Most reset lines on the controller are self clearing except for those dealing with the Cortex-M0 cores on LPC43xx devices. This driver also registers a restart handler that can be used to reset the entire device. Signed-off-by: Joachim Eastwood <manabian@gmail.com> Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
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