Messages in this thread | | | Subject | Re: [PATCH 2/2] ARM: dts: imx6ul: Add imx6ul-tempmon | From | Leonard Crestez <> | Date | Fri, 9 Jun 2017 13:58:15 +0300 |
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On Thu, 2017-06-08 at 13:45 -0300, Fabio Estevam wrote: > On Thu, Jun 8, 2017 at 1:26 PM, Leonard Crestez wrote: > > > > > + tempmon: tempmon { > > + compatible = "fsl,imx6ul-tempmon", "fsl,imx6sx-tempmon"; > > + interrupts = ; > > + fsl,tempmon = <&anatop>; > > + fsl,tempmon-data = <&ocotp>; > > + clocks = <&clks IMX6UL_CLK_PLL3_USB_OTG>; > Does the IMX6UL_CLK_PLL3_USB_OTG clock really control tempmon? Please > double check.
Yes, as far as I can tell the tempmon block uses the 480 Mhz PLL3 clock directly. This is similar to other imx6 SOCs. This PLL is used for stuff like USB but not only that. My understanding is the _USB_OTG suffix is descriptive, similar to PLL4_AUDIO and PLL6_ENET. Other non- usb components use PLL3 (like UART) but through other gates/dividers.
Setting this to IMX6UL_CLK_DUMMY will cause temperature reads to fail. Even if PLL3 usually ends up being constantly enabled because of uarts this is not true at imx_thermal_probe time (or uarts can be disabled).
-- Regards, Leonard
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