linux-kernel - [PATCH v4 0/8] mfd: introduce a driver for LPSS devices on SPT

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Message-Id: <1434362256-239992-1-git-send-email-andriy.shevchenko@linux.intel.com>
Date:	Mon, 15 Jun 2015 12:57:28 +0300
From:	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:	"Rafael J . Wysocki" <rjw@...ysocki.net>,
	linux-acpi@...r.kernel.org, linux-pm@...r.kernel.org,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Vinod Koul <vinod.koul@...el.com>,
	Lee Jones <lee.jones@...aro.org>,
	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>,
	Mike Turquette <mturquette@...aro.org>
Cc:	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Subject: [PATCH v4 0/8] mfd: introduce a driver for LPSS devices on SPT

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 fourth 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 patch 8 depends on clkdev_create() helper that has been introduced by
Russel King in [3].

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_001_Final.pdf
[2] http://comments.gmane.org/gmane.linux.power-management.general/60889
[3] https://patchwork.linuxtv.org/patch/28464/

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             |  14 +
 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, 1968 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

-- 
2.1.4

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