Commit Graph

240 Commits

Author SHA1 Message Date
Philipp Zabel cd7f4b81cf reset: lpc18xx: add driver Kconfig option
Visible only if COMPILE_TEST is enabled, this allows to include the
driver in build tests.

Acked-by: Joachim Eastwood <manabian@gmail.com>
Reviewed-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
2016-08-25 13:27:43 +02:00
Philipp Zabel 70d467ea16 reset: berlin: add driver Kconfig option
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: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
2016-08-25 13:27:42 +02:00
Philipp Zabel e27b4a6e63 reset: ath79: add driver Kconfig option
Visible only if COMPILE_TEST is enabled, this allows to include the
driver in build tests.

Acked-by: Aban Bedel <albeu@free.fr>
Reviewed-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
2016-08-25 13:27:35 +02:00
Philipp Zabel 9e9ba091aa reset: ath79: add missing include
The driver uses readl/writel, so it should include linux/io.h.

Acked-by: Aban Bedel <albeu@free.fr>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
2016-08-25 13:27:23 +02:00
Philipp Zabel a3774e146a reset: warn on invalid input to reset_control_reset/assert/deassert/status
Instead of potentially crashing, dump a backtrace and return -EINVAL if
rstc is NULL or an error code.

Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
2016-08-24 15:21:36 +02:00
Masahiro Yamada 54e991b566 reset: uniphier: add reset controller driver for UniPhier SoCs
This is the initial commit for UniPhier reset controller driver.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
2016-08-24 15:21:35 +02:00
Maxime Coquelin b70b009b24 drivers: reset: Add STM32 reset driver
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: Maxime Coquelin <mcoquelin.stm32@gmail.com>
Signed-off-by: Gabriel Fernandez <gabriel.fernandez@st.com>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
2016-08-24 15:21:28 +02:00
Philipp Zabel 6b37d3e956 reset: socfpga: no need to store modrst_offset
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: Philipp Zabel <p.zabel@pengutronix.de>
Tested-by: Dinh Nguyen <dinguyen@opensource.altera.com>
2016-08-08 19:23:32 +02:00
Andrew F. Davis cc7c2bb149 reset: add TI SYSCON based reset driver
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>
2016-06-29 23:39:10 +02:00
Xinliang Liu ab52b599c1 reset: hisilicon: Add hi6220 media subsystem reset support
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>
2016-06-29 23:39:09 +02:00
Chen Feng 8768a26cea reset: hisilicon: Change to syscon register access
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>
2016-06-29 23:39:09 +02:00
Neil Armstrong c7224dc343 reset: Add support for the Amlogic Meson SoC Reset Controller
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>
2016-06-01 08:21:10 +02:00
Neil Armstrong 42fa905bd9 reset: oxnas: Use devm register API and get rid of platform remove
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>
2016-05-30 09:37:47 +02:00
Masahiro Yamada 998cd4637f reset: fix Kconfig menu to include reset drivers in sub-menu
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>
2016-05-30 09:37:47 +02:00
Masahiro Yamada da1fda2a23 reset: zynq: use devm_reset_controller_register()
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>
2016-05-30 09:37:47 +02:00
Masahiro Yamada dc22e08ef7 reset: socfpga: use devm_reset_controller_register()
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>
2016-05-30 09:37:47 +02:00
Masahiro Yamada 2f38a88c7c reset: sunxi: use devm_reset_controller_register()
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>
2016-05-30 09:37:47 +02:00
Masahiro Yamada 1b1447f493 reset: pistachio: use devm_reset_controller_register()
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>
2016-05-30 09:37:47 +02:00
Masahiro Yamada 56865f452a reset: ath79: use devm_reset_controller_register()
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>
2016-05-30 09:37:47 +02:00
Masahiro Yamada 8d5b5d5ce5 reset: add devm_reset_controller_register API
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>
2016-05-30 09:37:47 +02:00
Neil Armstrong 6e667fac82 reset: Add Oxford Semiconductor Reset Controller driver
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>
2016-04-01 16:31:09 +02:00
Joachim Eastwood 773fe72630 reset: lpc18xx: get rid of global variables for restart notifier
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>
2016-03-30 15:42:07 +02:00
Hans de Goede 0b52297f22 reset: Add support for shared reset controls
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>
2016-03-30 15:42:05 +02:00
Hans de Goede c15ddec2ca reset: Share struct reset_control between reset_control_get calls
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>
2016-03-30 15:42:03 +02:00
Hans de Goede 6c96f05c8b reset: Make [of_]reset_control_get[_foo] functions wrappers
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>
2016-03-30 15:42:01 +02:00
Philipp Zabel f673ed4d5f reset: sti: Make reset_control_ops const
The syscfg_reset_ops structure is never modified. Make it const.

Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
2016-02-10 10:53:38 +01:00
Philipp Zabel 356d108f87 reset: zynq: Make reset_control_ops const
The zynq_reset_ops structure is never modified. Make it const.

Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
2016-02-10 10:53:37 +01:00
Philipp Zabel 387eb3f3d5 reset: socfpga: Make reset_control_ops const
The socfpga_reset_ops structure is never modified. Make it const.

Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
2016-02-10 10:53:36 +01:00
Philipp Zabel 0e18e60e1b reset: hi6220: Make reset_control_ops const
The hi6220_reset_ops structure is never modified. Make it const.

Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
2016-02-10 10:53:35 +01:00
Philipp Zabel d2f79f223f reset: ath79: Make reset_control_ops const
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>
2016-02-10 10:53:34 +01:00
Philipp Zabel 1a55cad19f reset: lpc18xx: Make reset_control_ops const
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>
2016-02-08 17:19:57 +01:00
Philipp Zabel 01501d5730 reset: sunxi: Make reset_control_ops const
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>
2016-02-08 17:03:48 +01:00
Philipp Zabel c0cc2609bc reset: img: Make reset_control_ops const
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>
2016-02-08 17:03:40 +01:00
Philipp Zabel b7a9007565 reset: berlin: Make reset_control_ops const
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>
2016-02-08 16:11:25 +01:00
Philipp Zabel 27ca5aaa36 reset: berlin: drop DT cell size check
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>
2016-02-05 16:42:31 +01:00
Damien Horsley 8a56736a2f reset: img: Add Pistachio reset controller driver
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>
2016-02-05 16:41:20 +01:00
Masahiro Yamada c41ef91f65 reset: hisilicon: check return value of reset_controller_register()
The newly added hisilicon reset driver missed the subsystem-wide
fixup by commit d1f15aa095 ("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>
2016-01-25 11:00:33 +01:00
Maxime Ripard e677774f50 reset: Move DT cell size check to the core
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>
2016-01-25 10:58:44 +01:00
Philipp Zabel d056c9b819 reset: remove unnecessary local variable initialization from 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>
2016-01-25 10:58:44 +01:00
Arnd Bergmann 70b3590f63 reset: hi6220: fix modular build
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>
2015-12-12 08:53:21 +01:00
Alban Bedel ba64e27e9d reset: ath79: Add system restart support
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>
2015-11-25 10:49:58 +01:00
Chen Feng f59d23c2c0 reset: hi6220: Reset driver for hisilicon hi6220 SoC
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>
2015-11-20 15:41:45 +01:00
Philipp Zabel b354f68ff0 reset: remove unused device pointer from struct reset_control
Commit 0c5b2b915a ("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>
2015-11-18 15:13:20 +01:00
Masahiro Yamada d1f15aa095 reset: check return value of reset_controller_register()
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>
2015-11-16 09:23:47 +01:00
Masahiro Yamada 5b321a631a reset: remove redundant $(CONFIG_RESET_CONTROLLER) from Makefile
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>
2015-11-16 09:23:47 +01:00
Philipp Zabel 39b4da71ca reset: use ENOTSUPP instead of ENOSYS
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>
2015-11-16 09:23:47 +01:00
Philipp Zabel fddad17ed1 reset: sunxi: mark the of_device_id array as __initconst
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>
2015-11-16 09:23:47 +01:00
Philipp Zabel 0437838484 reset: sti: add a missing blank line after declaration
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>
2015-11-16 09:23:47 +01:00
Lee Jones 9a4cc897fd reset: sti: Provide ops .status() call-back
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
2015-11-16 09:23:47 +01:00
Lee Jones 1a539387b7 reset: sti: Add support for resetting co-processors
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
2015-11-16 09:23:47 +01:00
Alban Bedel 3d81216fde reset: Fix of_reset_control_get() for consistent return values
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>
2015-11-16 09:23:47 +01:00
Vince Hsu c0a13aa6da reset: add of_reset_control_get_by_index()
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>
2015-11-16 09:23:47 +01:00
Axel Lin f319cb8491 reset: ath79: Fix missing spin_lock_init
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>
2015-09-01 14:48:40 +02:00
Philipp Zabel 5d44595c26 Merge branch 'reset/ath79' into reset/next 2015-08-16 17:11:20 +02:00
Moritz Fischer fedf42b50d reset: reset-zynq: Adding support for Xilinx Zynq reset controller.
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>
2015-08-04 17:07:46 +02:00
Alban Bedel ff591a9122 reset: Add a driver for the reset controller on the AR71XX/AR9XXX
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>
2015-08-04 10:41:30 +02:00
Dinh Nguyen 27e44646dc reset: socfpga: Update reset-socfpga to read the altr,modrst-offset property
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>
2015-08-03 13:13:59 +02:00
Joachim Eastwood c392b65ba8 reset: add driver for lpc18xx rgu
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>
2015-08-03 13:13:51 +02:00
Fabian Frederick a518db45c2 reset: sti: constify of_device_id array
of_device_id is always used as const.
(See driver.of_match_table and open firmware functions)

Signed-off-by: Fabian Frederick <fabf@skynet.be>
Acked-by: Maxime Coquelin <maxime.coquelin@st.com>
Acked-by: Patrice Chotard <patrice.chotard@st.com>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
2015-08-03 13:13:50 +02:00
Philipp Zabel efdf5aa8f1 ARM: STi: DT: Move reset controller constants into common location
By popular vote, the DT binding includes for reset controllers are located
in include/dt-bindings/reset/. Move the STi reset constants in there, too,
to avoid confusion.

Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Acked-by: Patrice Chotard <patrice.chotard@st.com>
2015-08-03 13:13:44 +02:00
Antoine Tenart bfff629618 reset: berlin: drop arch_initcall initialization
With proper platform driver probing for berlin reset driver, drop the
arch_initcall workaround.

Signed-off-by: Antoine Tenart <antoine.tenart@free-electrons.com>
Acked-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
2015-05-18 17:52:42 +02:00
Antoine Tenart aed6f3cadc reset: berlin: convert to a platform driver
The Berlin reset controller was introduced without being a platform
driver because of a needed DT rework: the node describing the reset
controller also describes the pinctrl and clk controllers...

Prepare conversion by adding a platform driver probe to a new
compatible "marvell,berlin2-reset" with syscon regmap.

Signed-off-by: Antoine Tenart <antoine.tenart@free-electrons.com>
Acked-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
2015-05-18 17:52:36 +02:00
Tyler Baker 41544f9f38 reset: sunxi: fix spinlock initialization
Call spin_lock_init() before the spinlocks are used, both in early init
and probe functions preventing a lockdep splat.

I have been observing lockdep complaining [1] during boot on my a80 optimus [2]
when CONFIG_PROVE_LOCKING has been enabled. This patch resolves the splat,
and has been tested on a few other sunxi platforms without issue.

[1] http://storage.kernelci.org/next/next-20150107/arm-multi_v7_defconfig+CONFIG_PROVE_LOCKING=y/lab-tbaker/boot-sun9i-a80-optimus.html
[2] http://kernelci.org/boot/?a80-optimus

Signed-off-by: Tyler Baker <tyler.baker@linaro.org>
Cc: <stable@vger.kernel.org>
Acked-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Kevin Hilman <khilman@linaro.org>
Signed-off-by: Olof Johansson <olof@lixom.net>
2015-01-16 19:11:31 -08:00
Linus Torvalds e6b5be2be4 Driver core patches for 3.19-rc1
Here's the set of driver core patches for 3.19-rc1.
 
 They are dominated by the removal of the .owner field in platform
 drivers.  They touch a lot of files, but they are "simple" changes, just
 removing a line in a structure.
 
 Other than that, a few minor driver core and debugfs changes.  There are
 some ath9k patches coming in through this tree that have been acked by
 the wireless maintainers as they relied on the debugfs changes.
 
 Everything has been in linux-next for a while.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'driver-core-3.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core

Pull driver core update from Greg KH:
 "Here's the set of driver core patches for 3.19-rc1.

  They are dominated by the removal of the .owner field in platform
  drivers.  They touch a lot of files, but they are "simple" changes,
  just removing a line in a structure.

  Other than that, a few minor driver core and debugfs changes.  There
  are some ath9k patches coming in through this tree that have been
  acked by the wireless maintainers as they relied on the debugfs
  changes.

  Everything has been in linux-next for a while"

* tag 'driver-core-3.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (324 commits)
  Revert "ath: ath9k: use debugfs_create_devm_seqfile() helper for seq_file entries"
  fs: debugfs: add forward declaration for struct device type
  firmware class: Deletion of an unnecessary check before the function call "vunmap"
  firmware loader: fix hung task warning dump
  devcoredump: provide a one-way disable function
  device: Add dev_<level>_once variants
  ath: ath9k: use debugfs_create_devm_seqfile() helper for seq_file entries
  ath: use seq_file api for ath9k debugfs files
  debugfs: add helper function to create device related seq_file
  drivers/base: cacheinfo: remove noisy error boot message
  Revert "core: platform: add warning if driver has no owner"
  drivers: base: support cpu cache information interface to userspace via sysfs
  drivers: base: add cpu_device_create to support per-cpu devices
  topology: replace custom attribute macros with standard DEVICE_ATTR*
  cpumask: factor out show_cpumap into separate helper function
  driver core: Fix unbalanced device reference in drivers_probe
  driver core: fix race with userland in device_add()
  sysfs/kernfs: make read requests on pre-alloc files use the buffer.
  sysfs/kernfs: allow attributes to request write buffer be pre-allocated.
  fs: sysfs: return EGBIG on write if offset is larger than file size
  ...
2014-12-14 16:10:09 -08:00
Arnd Bergmann a8afa2645c Reset controller changes for v3.19
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Merge tag 'reset-for-3.19-2' of git://git.pengutronix.de/git/pza/linux into next/drivers

Pull "Reset controller changes for v3.19" from Philipp Zabel:

This adds a new driver for the sti soc family, and creates
a reset_control_status interface, which is added to the existing
drivers.

* tag 'reset-for-3.19-2' of git://git.pengutronix.de/git/pza/linux:
  reset: add socfpga_reset_status
  reset: sti: Document sti-picophyreset controllers bindings.
  reset: stih407: Add softreset, powerdown and picophy controllers
  reset: stih407: Add reset controllers DT bindings
  reset: add reset_control_status helper function

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2014-12-04 16:57:36 +01:00
Dinh Nguyen f200890f22 reset: add socfpga_reset_status
Populate the reset_status callback for SOCFPGA.

Signed-off-by: Alan Tull <atull@opensource.altera.com>
Signed-off-by: Dinh Nguyen <dinguyen@opensource.altera.com>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
2014-11-04 12:40:16 +01:00
Philipp Zabel 1a5f77d395 STi reset controller updates for v3.19.
This tag adds support to STiH407 reset controllers:
   1. st,stih407-powerdown
   2. st,stih407-softreset
   3. st,stih407-picophyreset
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Merge tag 'sti-reset-for-v3.19-1' of git://git.stlinux.com/devel/kernel/linux-sti into reset/for_v3.19

STi reset controller updates for v3.19.

This tag adds support to STiH407 reset controllers:
  1. st,stih407-powerdown
  2. st,stih407-softreset
  3. st,stih407-picophyreset
2014-11-03 09:50:27 +01:00
Peter Griffin 3ba9204308 reset: stih407: Add softreset, powerdown and picophy controllers
This patch adds softreset, powerdown and picophy reset controllers for
the STiH407 SoC.

With this patch three new devices are registered: -
1. st,stih407-powerdown
2. st,stih407-softreset
3. st,stih407-picophyreset

All three devices use system configuration registers mapped via regmap to
perform the reset or powerdown. The powerdown controller also has
an acknowledgement.

A separate picophy reset controller manages the different reset channels within
the picophy, which have a different polarity to the other system softresets.
Managing these different picophy softreset channels is necessary to correctly
handle resuming from suspend when USB2 devices are plugged into the USB3 port.

Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Signed-off-by: Peter Griffin <peter.griffin@linaro.org>
Acked-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Maxime Coquelin <maxime.coquelin@st.com>
2014-10-31 13:00:15 +01:00
Antoine Ténart bd13251f71 reset: add the Berlin reset controller driver
Add a reset controller for Marvell Berlin SoCs which is used by the
USB PHYs drivers (for now).

Signed-off-by: Antoine Ténart <antoine.tenart@free-electrons.com>
Acked-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
2014-10-20 16:51:56 +02:00
Wolfram Sang d373860d70 reset: sti: drop owner assignment from platform_drivers
A platform_driver does not need to set an owner, it will be populated by the
driver core.

Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2014-10-20 16:21:30 +02:00
Wolfram Sang 569d5e911b reset: drop owner assignment from platform_drivers
A platform_driver does not need to set an owner, it will be populated by the
driver core.

Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2014-10-20 16:21:30 +02:00
Dinh Nguyen 729de41baf reset: add reset_control_status helper function
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>
2014-10-20 10:11:29 +02:00
Linus Torvalds a727eaf64f ARM: SoC driver changes
SoC-near driver changes that we're merging through our tree. Mostly
 because they depend on other changes we have staged, but in some cases
 because the driver maintainers preferred that we did it this way.
 
 This contains a largeish cleanup series of the omap_l3_noc bus driver,
 cpuidle rework for Exynos, some reset driver conversions and a long
 branch of TI EDMA fixes and cleanups, with more to come next release.
 
 The TI EDMA cleanups is a shared branch with the dmaengine tree, with
 a handful of Davinci-specific fixes on top.
 
 After discussion at last year's KS (and some more on the mailing lists),
 we are here adding a drivers/soc directory. The purpose of this is
 to keep per-vendor shared code that's needed by different drivers but
 that doesn't fit into the MFD (nor drivers/platform) model. We expect
 to keep merging contents for this hierarchy through arm-soc so we can
 keep an eye on what the vendors keep adding here and not making it a
 free-for-all to shove in crazy stuff.
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Merge tag 'drivers-for-3.16' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc into next

Pull ARM SoC driver changes from Olof Johansson:
 "SoC-near driver changes that we're merging through our tree.  Mostly
  because they depend on other changes we have staged, but in some cases
  because the driver maintainers preferred that we did it this way.

  This contains a largeish cleanup series of the omap_l3_noc bus driver,
  cpuidle rework for Exynos, some reset driver conversions and a long
  branch of TI EDMA fixes and cleanups, with more to come next release.

  The TI EDMA cleanups is a shared branch with the dmaengine tree, with
  a handful of Davinci-specific fixes on top.

  After discussion at last year's KS (and some more on the mailing
  lists), we are here adding a drivers/soc directory.  The purpose of
  this is to keep per-vendor shared code that's needed by different
  drivers but that doesn't fit into the MFD (nor drivers/platform)
  model.  We expect to keep merging contents for this hierarchy through
  arm-soc so we can keep an eye on what the vendors keep adding here and
  not making it a free-for-all to shove in crazy stuff"

* tag 'drivers-for-3.16' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (101 commits)
  cpufreq: exynos: Fix driver compilation with ARCH_MULTIPLATFORM
  tty: serial: msm: Remove direct access to GSBI
  power: reset: keystone-reset: introduce keystone reset driver
  Documentation: dt: add bindings for keystone pll control controller
  Documentation: dt: add bindings for keystone reset driver
  soc: qcom: fix of_device_id table
  ARM: EXYNOS: Fix kernel panic when unplugging CPU1 on exynos
  ARM: EXYNOS: Move the driver to drivers/cpuidle directory
  ARM: EXYNOS: Cleanup all unneeded headers from cpuidle.c
  ARM: EXYNOS: Pass the AFTR callback to the platform_data
  ARM: EXYNOS: Move S5P_CHECK_SLEEP into pm.c
  ARM: EXYNOS: Move the power sequence call in the cpu_pm notifier
  ARM: EXYNOS: Move the AFTR state function into pm.c
  ARM: EXYNOS: Encapsulate the AFTR code into a function
  ARM: EXYNOS: Disable cpuidle for exynos5440
  ARM: EXYNOS: Encapsulate boot vector code into a function for cpuidle
  ARM: EXYNOS: Pass wakeup mask parameter to function for cpuidle
  ARM: EXYNOS: Remove ifdef for scu_enable in pm
  ARM: EXYNOS: Move scu_enable in the cpu_pm notifier
  ARM: EXYNOS: Use the cpu_pm notifier for pm
  ...
2014-06-02 16:35:49 -07:00
Olof Johansson ed99885ccb Merge branch 'sunxi/drivers-for-3.16' of https://github.com/mripard/linux into next/drivers
Merge "Allwinner drivers changes for 3.16" from Maxime Ripard:

Reset drivers for the A31, that have been merged with reset maintainer's
Acked-by.

* 'sunxi/drivers-for-3.16' of https://github.com/mripard/linux:
  reset: sunxi: allow MFD subdevices probe
  reset: sunxi: document sunxi's reset controllers bindings

Signed-off-by: Olof Johansson <olof@lixom.net>
2014-05-21 14:42:56 -07:00
Gabriel FERNANDEZ d6c057f313 driver: reset: sti: add keyscan for stih416
Add keyscan reset on stih416 reset controller.

Acked-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Giuseppe Condorelli <giuseppe.condorelli@st.com>
Signed-off-by: Gabriel Fernandez <gabriel.fernandez@linaro.org>
Signed-off-by: Maxime Coquelin <maxime.coquelin@st.com>
2014-05-21 14:27:05 +02:00
Gabriel FERNANDEZ ce73d9be6a driver: reset: sti: add keyscan for stih415
Add keyscan reset on stih415 reset controller.

Acked-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Giuseppe Condorelli <giuseppe.condorelli@st.com>
Signed-off-by: Gabriel Fernandez <gabriel.fernandez@linaro.org>
Signed-off-by: Maxime Coquelin <maxime.coquelin@st.com>
2014-05-21 14:26:57 +02:00
Boris BREZILLON cd90f0cf44 reset: sunxi: allow MFD subdevices probe
The current implementation uses sunxi_reset_init function for both early
init and platform device probe.

The sunxi_reset_init function uses DT to retrieve device resources, which
will be an issue if reset controllers are registered from an MFD device
that define resources from mfd_cell definition.

Moreover, we can make of devm functions when we're in the probe context.

Signed-off-by: Boris BREZILLON <boris.brezillon@free-electrons.com>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Philipp Zabel <p.zabel@pengutronix.de>
2014-05-15 10:31:04 +02:00
Steffen Trumtrar a39a493932 reset: add driver for socfpga
Add a reset-controller driver for the socfpga platform.
The reset-controller has four banks with up to 32 entries all encapsulated in
one module block.

Signed-off-by: Steffen Trumtrar <s.trumtrar@pengutronix.de>
Acked-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Dinh Nguyen <dinguyen@altera.com>
---

Notes:
    Changes since v2:
        - remove superfluous ret in probe function
        - add Acked-by

    Changes since v1:
        - use BITS_PER_LONG everywhere instead of MAX_BANK_WIDTH
        - print pdev->dev.of_node->full_name on error
        - use proper IS_ERR/PTR_ERR
2014-04-25 17:40:08 -05:00
Arnd Bergmann 463e8474af Merge branch 'reset/for_v3.15' of git://git.pengutronix.de/git/pza/linux into next/drivers
Merge "reset controller fixes and updates" from Philipp Zabel:

* 'reset/for_v3.15' of git://git.pengutronix.de/git/pza/linux:
  reset: Add optional resets and stubs
  reset: Add of_reset_control_get
  reset: Mark function as static and remove unused function in core.c
  reset: allow drivers to request probe deferral

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2014-03-27 01:28:19 +01:00
Srinivas Kandagatla e9de663517 drivers: reset: stih416: add softreset controller
This patch adds softreset controller for STiH416 SOC, soft reset
controller is based on system configuration registers which are mapped
via regmap. This reset controller does not have any feedback or
acknowledgement. With this patch a new device "st,stih416-softreset" is
registered with system configuration registers based reset controller
that controls the softreset state of the hardware such as Ethernet, IRB.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@st.com>
Acked-by: Philipp Zabel <p.zabel@pengutronix.de>
2014-03-11 10:53:26 +00:00
Srinivas Kandagatla a596ebd3f7 drivers: reset: stih415: add softreset controller
This patch adds softreset controller for STiH415 SOC, soft reset
controller is based on system configuration registers which are mapped
via regmap. This reset controller does not have any feedback or
acknowledgement. With this patch a new device "st,stih415-softreset" is
registered with system configuration registers based reset controller
that controls the softreset state of the hardware such as Ethernet, IRB.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@st.com>
Acked-by: Philipp Zabel <p.zabel@pengutronix.de>
2014-03-11 10:51:58 +00:00
Stephen Gallimore d0ace0f6e5 drivers: reset: Reset controller driver for STiH416
This patch adds a reset controller platform driver for the STiH416
SoC. This initial version provides a compatible driver for the
"st,stih416-powerdown" device, which registers a system configuration
register based reset controller that controls the powerdown state of
hardware such as the on-chip USB host controllers.

Signed-off-by: Stephen Gallimore <stephen.gallimore@st.com>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@st.com>
Acked-by: Philipp Zabel <p.zabel@pengutronix.de>
2014-03-11 10:51:40 +00:00
Stephen Gallimore 1f42c290c3 drivers: reset: Reset controller driver for STiH415
This patch adds a reset controller platform driver for the STiH415
SoC. This initial version provides a compatible driver for the
"st,stih415-powerdown" device, which registers a system configuration
register based reset controller that controls the powerdown state of
hardware such as the on-chip USB host controllers.

Signed-off-by: Stephen Gallimore <stephen.gallimore@st.com>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@st.com>
Acked-by: Philipp Zabel <p.zabel@pengutronix.de>
2014-03-11 10:49:40 +00:00
Stephen Gallimore e5d76075d9 drivers: reset: STi SoC system configuration reset controller support
This patch adds a reset controller implementation for STMicroelectronics
STi family SoCs; it allows a group of related reset like controls found
in multiple system configuration registers to be represented by a single
controller device. System configuration registers are accessed through
the regmap framework and the mfd/syscon driver.

The implementation optionally supports waiting for the reset action to
be acknowledged in a separate status register and supports both
active high and active low reset lines. These properties are common across
all the reset channels in a specific reset controller instance, hence
all channels in a paritcular controller are expected to behave in the
same way.

Signed-off-by: Stephen Gallimore <stephen.gallimore@st.com>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@st.com>
Acked-by: Philipp Zabel <p.zabel@pengutronix.de>
2014-03-11 10:47:23 +00:00
Maxime Ripard fc0a592156 reset: Add of_reset_control_get
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>
2014-02-03 10:19:40 +01:00
Rashika Kheria 0c5b2b915a reset: Mark function as static and remove unused function in core.c
Mark function of_reset_simple_xlate() as static in core.c
because it is not used outside this file.
Also, remove functions devm_reset_control_put() and
devm_reset_control_match() because they are unused.

This eliminates the following warnings in core.c:
drivers/reset/core.c:46:5: warning: no previous prototype for ‘of_reset_simple_xlate’ [-Wmissing-prototypes]
drivers/reset/core.c:262:6: warning: no previous prototype for ‘devm_reset_control_put’ [-Wmissing-prototypes]

Signed-off-by: Rashika Kheria <rashika.kheria@gmail.com>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
2014-02-03 10:19:40 +01:00
Philipp Zabel 3d10302048 reset: allow drivers to request probe deferral
If the requested reset controller is not yet available, have reset_control_get
and device_reset return -EPROBE_DEFER so the driver can decide to request
probe deferral.

Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Reviewed-by: Stephen Warren <swarren@nvidia.com>
2014-02-03 10:19:39 +01:00
Maxime Ripard 8f1ae77f46 reset: Add Allwinner SoCs Reset Controller Driver
The Allwinner A31 and most of the other Allwinner SoCs have an IP
maintaining a few other IPs in the SoC in reset by default. Among these
IPs are the A31's High Speed Timers, hence why we can't use the regular
driver construct in every cases, and need to call the registering
function directly during machine initialisation.

Apart from this, the implementation is fairly straightforward, and could
easily be moved to a generic MMIO-based reset controller driver if the
need ever arise.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Philipp Zabel <p.zabel@pengutronix.de>
2013-11-22 21:20:36 +01:00
Dan Carpenter 6034bb22d8 reset: NULL deref on allocation failure
"rstc" is NULL here and we should use "rcdev" instead of "rstc->rcdev".

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
2013-04-12 10:26:24 +02:00
Philipp Zabel 61fc413176 reset: Add reset controller API
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>
2013-04-12 10:26:23 +02:00