linux-toradex.git/drivers/reset/reset-sunxi.c, branch v4.4.74 Linux kernel for Apalis and Colibri modules reset: sunxi: fix spinlock initialization 2015-01-17T03:11:31+00:00 Tyler Baker tyler.baker@linaro.org 2015-01-12T15:54:46+00:00 41544f9f38f19cb46dc9a8fa37c58677a0300899 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> 
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>
reset: drop owner assignment from platform_drivers 2014-10-20T14:21:30+00:00 Wolfram Sang wsa@the-dreams.de 2014-10-20T14:21:30+00:00 569d5e911b36102ed3398537d90a4e0cf11b852f 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> 
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>
reset: sunxi: allow MFD subdevices probe 2014-05-15T08:31:04+00:00 Boris BREZILLON boris.brezillon@free-electrons.com 2014-05-14T12:38:16+00:00 cd90f0cf4454861a4f87bdfdcf01e8b98cc94869 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> 
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>
reset: Add Allwinner SoCs Reset Controller Driver 2013-11-22T20:20:36+00:00 Maxime Ripard maxime.ripard@free-electrons.com 2013-09-24T08:07:43+00:00 8f1ae77f466660b6da2455cccecc07ae631fa66d 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> 
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>