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Date: Fri, 24 Jul 2015 18:29:01 +0300
From: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To: Lee Jones <lee.jones@...aro.org>
Cc: linux-acpi@...r.kernel.org, linux-pm@...r.kernel.org,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Vinod Koul <vinod.koul@...el.com>,
Andrew Morton <akpm@...ux-foundation.org>,
Mika Westerberg <mika.westerberg@...ux.intel.com>,
linux-kernel@...r.kernel.org, dmaengine@...r.kernel.org,
Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
Jarkko Nikula <jarkko.nikula@...ux.intel.com>,
"Wysocki, Rafael J" <rafael.j.wysocki@...el.com>,
mturquette@...libre.com, Stephen Boyd <sboyd@...eaurora.org>
Subject: Re: [PATCH v5 0/8] mfd: introduce a driver for LPSS devices on SPT
On Fri, 2015-07-24 at 16:16 +0100, Lee Jones wrote:
> On Thu, 23 Jul 2015, Andy Shevchenko wrote:
>
> > On Mon, 2015-07-06 at 15:22 +0300, Andy Shevchenko wrote:
> > > The new coming Intel platforms such as Skylake will contain
> > > Sunrisepoint PCH.
> > >
> > > The driver is based on MFD framework since the main device, i.e.
> > > serial bus
> > > controller, contains register space for itself, DMA part, and an
> > > additional
> > > address space (convergence layer).
> > >
> > > The public specification of the register map is avaiable in [1].
> > >
> > > This is fifth generation of the patch series to bring support
> > > LPSS
> > > devices
> > > found on Intel Sunrisepoint (Intel Skylake PCH). Previous one can
> > > be
> > > found here
> > > [2].
> > >
> > > The series has few logical parts:
> > > - patches 1-3 prepares PM core, ACPI, and driver core (PM) to
> > > handle
> > > our case
> > > - patches 4-6 introduce unregistering platform devices in MFD in
> > > reversed
> > > order
> > > - patch 7 implements iDMA 64-bit driver
> > > - patch 8 introduces an MFD driver for LPSS devices
> > >
> > > The patch 7 can be applied independently, though it's better if
> > > it
> > > goes before
> > > patch 8.
> > >
> > > The driver has been tested with SPI and UART on Intel Skylake
> > > PCH.
> > >
> > > [1] https://download.01.org/future-platform-configuration
> > > -hub/skylake/register-definitions/332219-002.pdf
> > > [2] http://www.spinics.net/lists/linux-acpi/msg58622.html
> >
> > Lee, can we move forward this thing somehow?
> >
> > We may create a topic branch for you where we apply already Acked
> > patches (1-5) to reduce burden on reviewers. Would it help?
>
> I just need one of the clock guys to take a look at the MFD patch
> before I apply the set.
Understood, thanks for clarification. I hope Stephen will find time to
answer soon.
>
> What other Acks are you waiting on?
Vinod's only, though you may apply everything else w/o idma64. JFYI,
besides Vinod's comments our Q/A found a bug in idma64 (it will be fixe
d in next iteration next week).
>
> NB: I don't need a branch, it's easier for me to apply patches from
> my
> mbox.
Okay, let's stick this approach.
>
> > > Changelog v5:
> > > - rebase on top of v4.2-rc1
> > > - patch 3 is modified accordingly to new changes in
> > > drivers/base/dd.c
> > > - correct Rafael's email in patch 3
> > >
> > > Changelog v4:
> > > - replace patch 3 by Rafael's suggession
> > > - append ACKs from Rafael
> > > - rebase on top of v4.1-rc8
> > >
> > > Changelog v3:
> > > - rework patch 3 to be used for all kind of devices (address
> > > Alan
> > > comment)
> > > - iDMA 64-bit driver improvements:
> > > - fix burst-to-register conversion
> > > - remove excessive locking
> > > - do not expose core part to the user (Kconfig)
> > > - address most of Lee's comments
> > > - append ACKs
> > > - rebase on top of v4.1-rc6
> > >
> > > Changelog v2:
> > > - new DMA driver to fully support iDMA 64-bit IP
> > > - patch 3 is added to wake up parent devices when ->probe(),
> > > ->remove(), or
> > > ->shutdown()
> > > - MFD core is unregistering devices in reversed order
> > > - address few Lee's comments on v1
> > > - address Russel's comment, therefore use clkdev_create()
> > > helper
> > > - intel-lpss{,-acpi,-pci} are modified regarding to above
> > > changes
> > >
> > > Andy Shevchenko (5):
> > > klist: implement klist_prev()
> > > driver core: implement device_for_each_child_reverse()
> > > mfd: make mfd_remove_devices() iterate in reverse order
> > > dmaengine: add a driver for Intel integrated DMA 64-bit
> > > mfd: Add support for Intel Sunrisepoint LPSS devices
> > >
> > > Mika Westerberg (2):
> > > PM / QoS: Make it possible to expose device latency tolerance
> > > to
> > > userspace
> > > ACPI / PM: Attach ACPI power domain only once
> > >
> > > Rafael J. Wysocki (1):
> > > Driver core: wakeup the parent device before trying probe
> > >
> > > drivers/acpi/device_pm.c | 8 +
> > > drivers/acpi/internal.h | 2 +
> > > drivers/acpi/scan.c | 46 ++-
> > > drivers/base/core.c | 43 +++
> > > drivers/base/dd.c | 20 ++
> > > drivers/base/power/power.h | 2 +
> > > drivers/base/power/qos.c | 37 +++
> > > drivers/base/power/sysfs.c | 11 +
> > > drivers/dma/Kconfig | 5 +
> > > drivers/dma/Makefile | 1 +
> > > drivers/dma/idma64.c | 724
> > > ++++++++++++++++++++++++++++++++++++++++++
> > > drivers/dma/idma64.h | 232 ++++++++++++++
> > > drivers/mfd/Kconfig | 23 ++
> > > drivers/mfd/Makefile | 3 +
> > > drivers/mfd/intel-lpss-acpi.c | 84 +++++
> > > drivers/mfd/intel-lpss-pci.c | 113 +++++++
> > > drivers/mfd/intel-lpss.c | 524
> > > ++++++++++++++++++++++++++++++
> > > drivers/mfd/intel-lpss.h | 62 ++++
> > > drivers/mfd/mfd-core.c | 2 +-
> > > include/linux/device.h | 2 +
> > > include/linux/klist.h | 1 +
> > > include/linux/pm_qos.h | 5 +
> > > lib/klist.c | 41 +++
> > > 23 files changed, 1974 insertions(+), 17 deletions(-)
> > > create mode 100644 drivers/dma/idma64.c
> > > create mode 100644 drivers/dma/idma64.h
> > > create mode 100644 drivers/mfd/intel-lpss-acpi.c
> > > create mode 100644 drivers/mfd/intel-lpss-pci.c
> > > create mode 100644 drivers/mfd/intel-lpss.c
> > > create mode 100644 drivers/mfd/intel-lpss.h
> > >
> >
>
--
Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Intel Finland Oy
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