[PATCH 00/13] Tegra124 CL-DVFS / DFLL clocksource, plus cpufreq

Tuomas Tynkkynen
2014-07-10T21:42:36Z

This series implements the DFLL/CL-DVFS clock source for the fast CPU
cluster on Tegra124, and a cpufreq driver that uses the DFLL for
clocking the CPU. Most of this is based on Paul Walmsley's public patch
set from December 2013, which is available at
http://comments.gmane.org/gmane.linux.ports.tegra/15273

The DFLL clock hardware is a voltage-controlled oscillator plus
control logic that compares the generated output clock with a
51 MHz reference clock, and can make decisions to either lower
or raise the DFLL voltage to keep the output rate close to the
software-requested rate. The voltage changes are done by
communicating with an off-chip PMIC via either I2C or PWM.
As the DFLL oscillator is powered via the CPU rail, using
the DFLL as the CPU clocksource also gives us dynamic CPU
voltage scaling.

This series has been tested on the Jetson TK1 (Rev C). Before attempting
to port this to the Venice2, do note that there are two versions of the
AS3722 with different voltage tables for the CPU rail (and that Venice2
does not have active cooling).

Thanks,
Tuomas

Paul Walmsley (1):
clk: tegra: Add DFLL DVCO reset control for Tegra124

Tuomas Tynkkynen (12):
clk: tegra: Add binding for the Tegra124 DFLL clocksource
clk: tegra: Add library for the DFLL clock source (open-loop mode)
clk: tegra: Add closed loop support for the DFLL
clk: tegra: Add functions for parsing CVB tables
clk: tegra: Add Tegra124 DFLL clocksource platform driver
clk: tegra: Save/restore CCLKG_BURST_POLICY on suspend
clk: tegra: Add the DFLL as a possible parent of the cclk_g clock
ARM: tegra: Add the DFLL to Tegra124 device tree
ARM: tegra: Enable the DFLL on the Jetson-TK1
cpufreq: tegra124: Add device tree bindings
cpufreq: Add cpufreq driver for Tegra124
ARM: tegra: Add entries for cpufreq on Tegra124

.../bindings/clock/nvidia,tegra124-dfll.txt | 86 +
.../bindings/cpufreq/tegra124-cpufreq.txt | 37 +
arch/arm/boot/dts/tegra124-jetson-tk1.dts | 83 +-
arch/arm/boot/dts/tegra124.dtsi | 29 +
arch/arm/mach-tegra/Kconfig | 1 +
drivers/clk/tegra/Makefile | 3 +
drivers/clk/tegra/clk-dfll.c | 1759 ++++++++++++++++++++
drivers/clk/tegra/clk-dfll.h | 55 +
drivers/clk/tegra/clk-tegra-super-gen4.c | 4 +-
drivers/clk/tegra/clk-tegra124-dfll-fcpu.c | 156 ++
drivers/clk/tegra/clk-tegra124.c | 61 +
drivers/clk/tegra/clk.h | 3 +
drivers/clk/tegra/cvb.c | 133 ++
drivers/clk/tegra/cvb.h | 67 +
drivers/cpufreq/Makefile | 1 +
drivers/cpufreq/tegra124-cpufreq.c | 221 +++
16 files changed, 2697 insertions(+), 2 deletions(-)
create mode 100644 Documentation/devicetree/bindings/clock/nvidia,tegra124-dfll.txt
create mode 100644 Documentation/devicetree/bindings/cpufreq/tegra124-cpufreq.txt
create mode 100644 drivers/clk/tegra/clk-dfll.c
create mode 100644 drivers/clk/tegra/clk-dfll.h
create mode 100644 drivers/clk/tegra/clk-tegra124-dfll-fcpu.c
create mode 100644 drivers/clk/tegra/cvb.c
create mode 100644 drivers/clk/tegra/cvb.h
create mode 100644 drivers/cpufreq/tegra124-cpufreq.c

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1.8.1.5