Hi Keerthy, On 06/10/2013 06:03 AM, J, KEERTHY wrote: > Hi Stephen, > > Thanks for the review comments. > > ________________________________________ > From: Stephen Warren [swar...@wwwdotorg.org] > Sent: Saturday, June 08, 2013 1:26 AM > To: J, KEERTHY > Cc: Cousson, Benoit; devicetree-disc...@lists.ozlabs.org; > linux-o...@vger.kernel.org; linux-kernel@vger.kernel.org; > ldewan...@nvidia.com; grant.lik...@secretlab.ca; swar...@nvidia.com; > sa...@linux.intel.com; g...@slimlogic.co.uk; lee.jo...@linaro.org > Subject: Re: [PATCH] ARM: dts: add dtsi for palmas > > On 06/07/2013 05:28 AM, J Keerthy wrote: >> Adds palmas mfd and palmas regulator nodes. This is >> based on the patch series: >> >> http://www.mail-archive.com/linux-omap@vger.kernel.org/msg89957.html >> >> The device tree nodes are based on: >> https://lkml.org/lkml/2013/6/6/25 > >> diff --git a/arch/arm/boot/dts/palmas.dtsi b/arch/arm/boot/dts/palmas.dtsi > >> +&palmas { > > Hmmm. That (i.e. requiring the board file to declare the node, then > setting up all the content by later including this file) is an > interesting approach. I guess it's reasonable. The one issue is that it > makes it a little harder for the board file to override any of the > properties in this file., although it certainly is possible by including > those overrides after the include. > > Irrespective of that, some comments on this: > >> + palmas_pmic { > >> + ti,ldo6-vibrator; > > For example, what if the board doesn't want to have the property set? > >> + >> + regulators { >> + smps123_reg: smps123 { >> + regulator-name = "smps123"; >> + regulator-min-microvolt = < 600000>; >> + regulator-max-microvolt = <1500000>; > > Or what if the board wants to limit the voltage range of this regulator > due to what it's used for on the board. > >> + regulator-always-on; >> + regulator-boot-on; > > And those two properties are almost certainly board-specific policy. > > Totally agree to all the above concerns. So can we have a custom .dtsi file > for a board+pmic combination? Or have only the required properties over ridden > in the board file?
Yes, you can do that potentially if most OMAP5 boards will reuse the same kind of settings. Kevin has just done that for OMAP3 + twl4030. In this case, since we do have only one board, I'm not sure it worth the effort. Regards, Benoit -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
