linux-kernel - Re: [PATCH 1/3] thermal: bcm281xx: Add Temperature Monitor driver

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Date:	Sun, 27 Oct 2013 02:05:10 -0500
From:	Kumar Gala <galak@...eaurora.org>
To:	Matt Porter <matt.porter@...aro.org>
Cc:	Wendy Ng <wendy.ng@...adcom.com>,
	Rob Herring <rob.herring@...xeda.com>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Stephen Warren <swarren@...dotorg.org>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Eduardo Valentin <eduardo.valentin@...com>,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-pm@...r.kernel.org, Christian Daudt <bcm@...thebug.org>,
	Markus Mayer <mmayer@...adcom.com>,
	Tim Kryger <tim.kryger@...aro.org>
Subject: Re: [PATCH 1/3] thermal: bcm281xx: Add Temperature Monitor driver


On Oct 26, 2013, at 7:45 AM, Matt Porter wrote:

> On Sat, Oct 26, 2013 at 01:47:40AM -0500, Kumar Gala wrote:
>> 
>> On Oct 26, 2013, at 1:46 AM, Kumar Gala wrote:
>> 
>>> 
>>> On Oct 25, 2013, at 7:00 PM, Wendy Ng wrote:
>>> 
>>>> This adds the support for Temperature Monitor (TMON) driver for
>>>> Broadcom bcm281xx SoCs. This driver plugs into the Thermal Framework.
>>>> 
>>>> Note that this version of the TMON driver does support interrupt-driven
>>>> mode -- only polling-mode of the thermal framework can be used.
>>>> 
>>>> Signed-off-by: Wendy Ng <wendy.ng@...adcom.com>
>>>> Reviewed-by: Markus Mayer <mmayer@...adcom.com>
>>>> Reviewed-by: Christian Daudt <csd@...adcom.com>
>>>> Reviewed-by: Matt Porter <matt.porter@...aro.org>
>>>> Reviewed-by: Tim Kryger <tim.kryger@...aro.org>
>>>> ---
>>>> .../bindings/thermal/bcm-kona-thermal.txt          |   24 +++
>>>> drivers/thermal/Kconfig                            |   11 ++
>>>> drivers/thermal/Makefile                           |    1 +
>>>> drivers/thermal/bcm_kona_tmon.c                    |  173 ++++++++++++++++++++
>>>> 4 files changed, 209 insertions(+)
>>>> create mode 100644 Documentation/devicetree/bindings/thermal/bcm-kona-thermal.txt
>>>> create mode 100644 drivers/thermal/bcm_kona_tmon.c
>>>> 
>>>> diff --git a/Documentation/devicetree/bindings/thermal/bcm-kona-thermal.txt b/Documentation/devicetree/bindings/thermal/bcm-kona-thermal.txt
>>>> new file mode 100644
>>>> index 0000000..225b898
>>>> --- /dev/null
>>>> +++ b/Documentation/devicetree/bindings/thermal/bcm-kona-thermal.txt
>>>> @@ -0,0 +1,24 @@
>>>> +* Broadcom Kona TMON bindings
>>>> +
>>>> +This version is for the Kona family of SoCs.  The TMON (Temperature Monitor)
>>>> +block in a Kona SoC device is used to measure the chip temperature at constant
>>>> +intervals.
>>>> +The TMON block asserts an interrupt if temperature exceeds a user programmed
>>>> +threshold value.  The TMON block would reset the entire device once it
>>>> +reaches a critical temperature which is also a programmable setting.
>>>> +
>>>> +Required properties:
>>>> +- compatible : "brcm,bcm11351-tmon", "brcm,kona-tmon"
>>>> +- reg : Address range of the thermal register
>>>> +- clocks : the clock signal that drives the TMON block
>>>> +- interrupts: the interrupt signal associated with the TMON block
>>>> +
>>>> +
>>>> +Example:
>>>> +	tmon@...08000 {
>>>> +		compatible = "brcm,bcm11351-tmon", "brcm,kona-tmon";
>>>> +		reg = <0x34008000 0x0024>;
>>>> +		clocks = <&tmon_1m_clk>;
>>>> +		interrupts = <GIC_SPI 183 IRQ_TYPE_LEVEL_HIGH>;
>>>> +		status = "disabled";
>>> 
>>> I'd remove the 'status' line from an example.
>>> 
>>>> +	};
>>> 
>>> Ack on the binding (beyond my minor nit pick on the status prop).
>>> 
>>> Acked-by: Kumar Gala <galak@...eaurora.org>
>>> 
>>> - k
>> 
>> 
>> After looking at your .dts{i} I see you've got a #thermal-sensor-cells prop, where is that documented?
> 
> It's in Eduardo's "device thermal limits represented in device tree
> nodes" series. Here's the direct link to the binding post/discussion
> https://lkml.org/lkml/2013/9/26/772
> 
> -Matt

Than as you mentioned in another thread, we should have a reference to that binding in this one.

- k


-- 
Employee of Qualcomm Innovation Center, Inc.
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation

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