linux-kernel - [PATCH v2 0/8] mfd: introduce a driver for LPSS devices on SPT

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Date:	Mon, 25 May 2015 19:09:24 +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>
Cc:	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Subject: [PATCH v2 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 [3].

This is second generation of the patch series to bring support LPSS devices
found on Intel Sunrisepoint (Intel Skylake PCH). First 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 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] https://lkml.org/lkml/2015/3/31/255
[3] https://patchwork.linuxtv.org/patch/28464/

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

Heikki Krogerus (1):
  core: platform: wakeup the parent before trying any driver operations

Mika Westerberg (2):
  PM / QoS: Make it possible to expose device latency tolerance to
    userspace
  ACPI / PM: Attach ACPI power domain only once

 drivers/acpi/device_pm.c      |   8 +
 drivers/acpi/internal.h       |   2 +
 drivers/acpi/scan.c           |  46 ++-
 drivers/base/core.c           |  43 +++
 drivers/base/platform.c       |  21 +-
 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          | 749 ++++++++++++++++++++++++++++++++++++++++++
 drivers/dma/idma64.h          | 233 +++++++++++++
 drivers/mfd/Kconfig           |  24 ++
 drivers/mfd/Makefile          |   3 +
 drivers/mfd/intel-lpss-acpi.c |  84 +++++
 drivers/mfd/intel-lpss-pci.c  | 113 +++++++
 drivers/mfd/intel-lpss.c      | 534 ++++++++++++++++++++++++++++++
 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, 2011 insertions(+), 18 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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