[PATCHv2 0/4] socfpga: Enable SD/MMC support

[dinguyen at altera.com]

From: Dinh Nguyen <dinguyen at altera.com>

Hi,

This is v2 of the patch series to enable SD/MMC on the SOCFPGA platform.

V2 adds a syscon driver to control the system manager registers.

V1 of the cover-letter of this patch series appears below:
This patch series enables support for the Synopsys SD/MMC driver that is
on the Altera SOCFPGA platform. The reason why this series has 4 patches
is to implement Arnd's suggestion:

http://lists.infradead.org/pipermail/linux-arm-kernel/2013-October/204982.html

To summarize Arnd's suggestion:

1. Create a backend syscon driver to control the system manager.
2. Create a clock driver independent of the SOCFPGA clock driver that
   uses syscon as the low-level interface.
3. Make the sdmmc driver use the normal clock API and link its clock to
   the driver step 2 in the device tree.

The end approach is a bit different because I did not find the need for a
syscon driver for the system manager. Since the system manager had already
been iomap already in the SOCFPGA platform code, I just reused it in the
new clock driver.

Patch 1/4: clk: socfpga: Add a clock driver for SOCFPGA's system manager
This patch adds a clk-sysmgr driver that can be use by a common clock API
to set system manager register bits needed by the SD/MMC driver. The SD/MMC
driver can simply call a common clock API to set the required clock phase
settings for the SD/MMC CIU.

Patch 2/4: arm: dts: Add a system manager compatible property
This patch adds a DTS compatible entry for the new clk-sysmgr driver.

Patch 3/4: mmc: dw_mmc-socfpga: Clean up SOCFPGA platform specific functionality
This patch cleans up dw_mmc-socpfga.c file from defines that are outside of
the SD/MMC IP. It makes the common clock API call to set the SD/MMC clock
phase settings in the system manager.

Patch 4/4: arm: dts: Add support for SD/MMC on SOCFPGA
This patch adds the necessary DTS bindings for the SOCFPGA specific extensions
to the base Synopsys DW SD/MMC driver.

Thanks,
Dinh 

Dinh Nguyen (4):
  clk: socfpga: Add a clock driver for SOCFPGA's system manager
  arm: dts: Add a system manager compatible property
  mmc: dw_mmc-socfpga: Clean up SOCFPGA platform specific functionality
  arm: dts: Add support for SD/MMC on SOCFPGA

 .../bindings/arm/altera/socfpga-system.txt         |   10 ++
 .../devicetree/bindings/mmc/socfpga-dw-mshc.txt    |   38 ++++++++
 arch/arm/boot/dts/socfpga.dtsi                     |   23 ++++-
 arch/arm/boot/dts/socfpga_cyclone5.dts             |   12 +++
 arch/arm/boot/dts/socfpga_vt.dts                   |   12 +++
 drivers/clk/socfpga/Makefile                       |    2 +-
 drivers/clk/socfpga/clk-sysmgr.c                   |   98 ++++++++++++++++++++
 drivers/mmc/host/dw_mmc-socfpga.c                  |   80 ++--------------
 8 files changed, 202 insertions(+), 73 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/mmc/socfpga-dw-mshc.txt
 create mode 100644 drivers/clk/socfpga/clk-sysmgr.c
---
CC: Arnd Bergmann <arnd at arndb.de>
Cc: Mike Turquette <mturquette at linaro.org>
CC: Olof Johansson <olof at lixom.net>
Cc: Rob Herring <rob.herring at calxeda.com>
Cc: Pawel Moll <pawel.moll at arm.com>
Cc: Mark Rutland <mark.rutland at arm.com>
Cc: Stephen Warren <swarren at wwwdotorg.org>
Cc: Ian Campbell <ian.campbell at citrix.com>
Cc: Chris Ball <cjb at laptop.org>
Cc: Jaehoon Chung <jh80.chung at samsung.com>
Cc: Seungwon Jeon <tgih.jun at samsung.com>
Cc: devicetree at vger.kernel.org
Cc: linux-mmc at vger.kernel.org
CC: linux-arm-kernel at lists.infradead.org


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