Re: [PATCH] thermal: armada: read stable temp on Armada XP
From: Gregory CLEMENT <hidden>
Date: 2015-02-25 16:10:25
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Hi Tyler, Eduardo, On 24/02/2015 20:56, Tyler Hall wrote:
Eduardo, On Tue, Feb 24, 2015 at 1:36 PM, Eduardo Valentin [off-list ref] wrote:quoted
The fix seams reasonable. Although, it remains the question what is applicability to other Armada chips? Besides, shouldn't we simply use it by default? Also, do you plan to send updates in the DTS files?As far as I can tell, Armada 370 is already using the equivalent of this register I'd like to use in Armada XP. I'm not sure about the other mvebu platforms. I couldn't just change the device tree for XP to instantiate the 370 sensor, however, as they have different initialization routines. Possibly Eziquiel can comment on the significance of the differences between armadaxp_init_sensor() and armada370_init_sensor(). I would like to change the default going forward, but I don't think it can be changed on platforms using an older DTB.
Here you introduced a new kind of thermal sensor, at least from the point of view of the device tree. You used a new compatible string associated to a different register. By using it by default do you mean removing marvell,armadaxp-thermal and adding armadaxp-filtered-thermal instead ? Does that new thermal sensors only improve the stability or does it also modify the value? In the second case it will more or less break the user space expectation.
I had planned to submit the dts change separately. It's not clear to me how that's supposed to be handled if they might go through different trees.
For this, there is no problem be handled in a different tree. At the end we will need both the a new dts and a new driver to use it, so the fact that the dts or the driver patch is merged in mainline first is not important. Thanks, Gregory
Thanks, Tyler -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
-- Gregory Clement, Free Electrons Kernel, drivers, real-time and embedded Linux development, consulting, training and support. http://free-electrons.com