linux-toradex.git/drivers/reset, branch v3.15-rc7

Merge branch 'reset/for_v3.15' of git://git.pengutronix.de/git/pza/linux into next/drivers

2014-03-27T00:28:19+00:00

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

drivers: reset: stih416: add softreset controller

2014-03-11T10:53:26+00:00

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 
Acked-by: Philipp Zabel

drivers: reset: stih415: add softreset controller

2014-03-11T10:51:58+00:00

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 
Acked-by: Philipp Zabel

drivers: reset: Reset controller driver for STiH416

2014-03-11T10:51:40+00:00

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 
Signed-off-by: Srinivas Kandagatla 
Acked-by: Philipp Zabel

drivers: reset: Reset controller driver for STiH415

2014-03-11T10:49:40+00:00

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 
Signed-off-by: Srinivas Kandagatla 
Acked-by: Philipp Zabel

drivers: reset: STi SoC system configuration reset controller support

2014-03-11T10:47:23+00:00

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 
Signed-off-by: Srinivas Kandagatla 
Acked-by: Philipp Zabel

reset: Add of_reset_control_get

2014-02-03T09:19:40+00:00

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 
Signed-off-by: Philipp Zabel

reset: Mark function as static and remove unused function in core.c

2014-02-03T09:19:40+00:00

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 
Reviewed-by: Josh Triplett 
Signed-off-by: Philipp Zabel

reset: allow drivers to request probe deferral

2014-02-03T09:19:39+00:00

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 
Acked-by: Shawn Guo 
Reviewed-by: Stephen Warren

reset: Add Allwinner SoCs Reset Controller Driver

2013-11-22T20:20:36+00:00

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 
Acked-by: Philipp Zabel