[PATCH v5 0/3] Add support for Tegra Activity Monitor

Hello,

this v5 addresses a few comments from Alexandre:

* Clarify the units of avg_dependency_threshold
* Remove unused references to platform_device
* Enable and disable interrupts on governor events
* Make sure we handle all interrupts for any of the devices we are sampling
* Move locking to be per-actmon-device

These patches implement support for setting the rate of the EMC clock based on
stats collected from the ACTMON, a piece of hw in the Tegra124 that counts
memory accesses (among others).

It depends on the following in-flight patches:

* EMC driver: http://thread.gmane.org/gmane.linux.drivers.devicetree/99304
* CPUFreq driver: http://thread.gmane.org/gmane.linux.kernel/1812962

I have pushed a branch here for testing:

http://cgit.collabora.com/git/user/tomeu/linux.git/log/?h=actmon-v5

Regards,

Tomeu

Tomeu Vizoso (3):
  of: Add binding for NVIDIA Tegra ACTMON node
  PM / devfreq: tegra: add devfreq driver for Tegra Activity Monitor
  ARM: tegra: Add Tegra124 ACTMON support

 .../devicetree/bindings/arm/tegra/actmon.txt       |  38 +
 arch/arm/boot/dts/tegra124.dtsi                    |  23 +
 drivers/devfreq/Kconfig                            |   9 +
 drivers/devfreq/Makefile                           |   1 +
 drivers/devfreq/tegra-actmon-devfreq.c             | 767 +++++++++++++++++++++
 5 files changed, 838 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/arm/tegra/actmon.txt
 create mode 100644 drivers/devfreq/tegra-actmon-devfreq.c

-- 
1.9.3

Add device node for the ACTMON block to the Tegra124 device tree.

Signed-off-by: Tomeu Vizoso <redacted>

---

v2:	* Add operating-points property
---
 arch/arm/boot/dts/tegra124.dtsi | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/arch/arm/boot/dts/tegra124.dtsi b/arch/arm/boot/dts/tegra124.dtsi
index a49e7da..9d7baa8 100644
--- a/arch/arm/boot/dts/tegra124.dtsi
+++ b/arch/arm/boot/dts/tegra124.dtsi

@@ -215,6 +215,29 @@
 		reg = <0x0 0x60007000 0x0 0x1000>;
 	};
 
+	actmon at 0,6000c800 {
+		compatible = "nvidia,tegra124-actmon";
+		reg = <0x0 0x6000c800 0x0 0x400>;
+		interrupts = <GIC_SPI 45 IRQ_TYPE_LEVEL_HIGH>;
+		clocks = <&tegra_car TEGRA124_CLK_ACTMON>,
+			 <&tegra_car TEGRA124_CLK_EMC>;
+		clock-names = "actmon", "emc";
+		resets = <&tegra_car 119>;
+		reset-names = "actmon";
+		operating-points = <
+			/* KHz	uV */
+			/* TODO: Add more points below 102 MHz */
+			102000	800000
+			204000	800000
+			300000	820000
+			396000	850000
+			528000	880000
+			600000	910000
+			792000	980000
+			924000	1010000
+		>;
+	};
+
 	gpio: gpio at 0,6000d000 {
 		compatible = "nvidia,tegra124-gpio", "nvidia,tegra30-gpio";
 		reg = <0x0 0x6000d000 0x0 0x1000>;

-- 
1.9.3

On Tue, Dec 16, 2014 at 5:41 PM, Tomeu Vizoso
[off-list ref] wrote:

Add device node for the ACTMON block to the Tegra124 device tree.

Reviewed-by: Alexandre Courbot <acourbot@nvidia.com>