linux-kernel - [PATCH v6 00/15] Tegra124 EMC (external memory controller) support

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Date:	Thu, 12 Feb 2015 15:06:16 +0100
From:	Tomeu Vizoso <tomeu.vizoso@...labora.com>
To:	linux-tegra@...r.kernel.org
Cc:	Javier Martinez Canillas <javier.martinez@...labora.co.uk>,
	Mikko Perttunen <mikko.perttunen@...si.fi>,
	Tomeu Vizoso <tomeu.vizoso@...labora.com>,
	Alexandre Courbot <gnurou@...il.com>,
	devicetree@...r.kernel.org, Eduardo Valentin <edubezval@...il.com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Joerg Roedel <jroedel@...e.de>,
	Kumar Gala <galak@...eaurora.org>,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Mark Rutland <mark.rutland@....com>,
	Mike Turquette <mturquette@...aro.org>,
	Mikko Perttunen <mperttunen@...dia.com>,
	Paul Walmsley <paul@...an.com>,
	Pawel Moll <pawel.moll@....com>,
	Peter De Schrijver <pdeschrijver@...dia.com>,
	Prashant Gaikwad <pgaikwad@...dia.com>,
	Rob Herring <robh+dt@...nel.org>,
	Russell King <linux@....linux.org.uk>,
	Stephen Boyd <sboyd@...eaurora.org>,
	Stephen Warren <swarren@...dotorg.org>,
	Thierry Reding <thierry.reding@...il.com>
Subject: [PATCH v6 00/15] Tegra124 EMC (external memory controller) support

Hello,

this v6 mainly contains a rebase on latest linux-next.

There's an outstanding issue with frequencies lower than 102MHz, as the MC IP
complains of EMEM arbitration errors when at those frequencies. Any suggestions
welcome. The downstream kernels that I have seen ignore those errors, but mainline prints a message out, so it's actually visible even if everything else appears to keep working.

So far it has been tested only on a Jetson TK1.

Patch 1: Removes the old EMC clock, that was unused and not functional

Patch 2: Documents bindings for the new long-ram-code property

Patch 3: Adds API for reading the ram code

Patches 4 to 7: Document OF additions

Patch 8: Adds EMC node to Tegra124 DT

Patch 9: Adds timings for Jetson TK1 board

Patch 10: Adds functions to the MC driver so the EMC driver can stay within its
own registers

Patch 11: Adds the actual EMC driver, making use of the new MC API

Patch 12: Adds EMC clock driver, making use of API provided by the EMC driver

Patch 13: Adds debugfs entry for getting and setting the EMC rate

Patch 14: On Tegra124, have the EMC clock be the parent of the MC clock

http://cgit.collabora.com/git/user/tomeu/linux.git/log/?h=emc-v6

Regards,

Tomeu

Mikko Perttunen (9):
  clk: tegra124: Remove old emc clock
  soc/tegra: Add ram code reader helper
  of: Add Tegra124 EMC bindings
  ARM: tegra: Add EMC to Tegra124 device tree
  ARM: tegra: Add EMC timings to Jetson TK1 device tree
  memory: tegra: Add API needed by the EMC driver
  memory: tegra: Add EMC (external memory controller) driver
  clk: tegra: Add EMC clock driver
  memory: tegra: Add debugfs entry for getting and setting the EMC rate

Tomeu Vizoso (6):
  of: Document long-ram-code property in nvidia,tegra20-apbmisc
  of: document new emc-timings subnode in nvidia,tegra124-car
  of: Document timings subnode of nvidia,tegra-mc
  of: document external-memory-controller property in tegra124-car
  clk: Expose clk_hw_reparent to providers
  clk: tegra: Set the EMC clock as the parent of the MC clock

 .../bindings/clock/nvidia,tegra124-car.txt         |   44 +-
 .../memory-controllers/nvidia,tegra-mc.txt         |   84 +-
 .../bindings/memory-controllers/tegra-emc.txt      |  379 +++
 .../bindings/misc/nvidia,tegra20-apbmisc.txt       |    2 +
 arch/arm/boot/dts/tegra124-jetson-tk1-emc.dtsi     | 2469 ++++++++++++++++++++
 arch/arm/boot/dts/tegra124-jetson-tk1.dts          |    2 +
 arch/arm/boot/dts/tegra124.dtsi                    |    8 +
 drivers/clk/clk.c                                  |    8 +
 drivers/clk/tegra/Makefile                         |    2 +-
 drivers/clk/tegra/clk-emc.c                        |  528 +++++
 drivers/clk/tegra/clk-tegra124.c                   |   18 +-
 drivers/clk/tegra/clk.h                            |    3 +
 drivers/memory/tegra/Kconfig                       |   11 +
 drivers/memory/tegra/Makefile                      |    2 +
 drivers/memory/tegra/mc.c                          |  136 ++
 drivers/memory/tegra/tegra124-emc.c                | 1164 +++++++++
 drivers/memory/tegra/tegra124.c                    |   44 +
 drivers/soc/tegra/fuse/tegra-apbmisc.c             |   19 +
 include/linux/clk-provider.h                       |    1 +
 include/soc/tegra/emc.h                            |   19 +
 include/soc/tegra/fuse.h                           |    1 +
 include/soc/tegra/mc.h                             |   14 +-
 22 files changed, 4939 insertions(+), 19 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/memory-controllers/tegra-emc.txt
 create mode 100644 arch/arm/boot/dts/tegra124-jetson-tk1-emc.dtsi
 create mode 100644 drivers/clk/tegra/clk-emc.c
 create mode 100644 drivers/memory/tegra/tegra124-emc.c
 create mode 100644 include/soc/tegra/emc.h

-- 
1.9.3

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