[PATCH 00/10] Tegra124 EMC (external memory controller) support

From: Tomeu Vizoso
Date: Fri Oct 10 2014 - 08:50:55 EST


because Mikko's internship is over and he's short of time these days, I have
taken his patches witht he intention of moving this work forward.

It depends on Thierry's MC patches at [0] and a branch can be found at [1]. So far it has been tested only on a Jetson TK1.

The comments from the last review round have been addressed, most notably:

- Timings are per-ramcode.

- A new property in the DT can cause the whole 4 bits in PMC_STRAPPING_OPT_A_0
[7:4] to be used when decoding the ram code, allowing for a single board to
support more ram configurations.

- Each driver accesses only its own registers, so API has been added so each
driver can delegate on the others.

- Usage of debugfs for setting the clock rate of the EMC clock has been split
in its own commit in case it's still controversial.

Patch 1: Removes clocks that are unused because of not being fully functional

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

Patch 3: Adds API for reading the ram code

Patch 4: Adds bindings for the EMC node

Patch 5: Adds EMC node to Tegra124 DT

Patch 6: Adds timings for Jetson TK1 board

Patch 7: Adds functions to the MC driver so the EMC driver can stay within its
own registers

Patch 8: Adds the actual EMC driver, making use of the new MC API

Patch 9: Adds EMC clock driver, making use of API provided by the EMC driver

Patch 10: Adds debugfs entry for getting and setting the EMC rate



[0] https://github.com/thierryreding/linux/commits/staging/iommu
[1] http://cgit.collabora.com/git/user/tomeu/linux.git/log/?h=emc

Mikko Perttunen (8):
clk: tegra124: Remove old emc_mux and emc clocks
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

Tomeu Vizoso (2):
soc/tegra: Document long-ram-code property in nvidia,tegra20-apbmisc
memory: tegra: Add debugfs entry for getting and setting the EMC rate

.../bindings/memory-controllers/tegra-emc.txt | 41 +
.../bindings/misc/nvidia,tegra20-apbmisc.txt | 3 +
arch/arm/boot/dts/tegra124-jetson-tk1-emc.dtsi | 2412 ++++++++++++++++++++
arch/arm/boot/dts/tegra124-jetson-tk1.dts | 2 +
arch/arm/boot/dts/tegra124.dtsi | 7 +
drivers/clk/tegra/Makefile | 2 +-
drivers/clk/tegra/clk-emc.c | 449 ++++
drivers/clk/tegra/clk-tegra124.c | 13 +-
drivers/clk/tegra/clk.h | 2 +
drivers/memory/Kconfig | 10 +
drivers/memory/Makefile | 1 -
drivers/memory/tegra/Makefile | 1 +
drivers/memory/tegra/tegra-mc.c | 172 ++
drivers/memory/tegra/tegra124-emc.c | 1164 ++++++++++
drivers/soc/tegra/fuse/tegra-apbmisc.c | 19 +
include/soc/tegra/fuse.h | 1 +
include/soc/tegra/memory.h | 19 +
17 files changed, 4304 insertions(+), 14 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/memory.h


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