Messages in this thread | | | Date | Wed, 17 Dec 2014 17:45:05 +0200 | From | Tero Kristo <> | Subject | Re: [PATCH 2/2] ARM: omap5/dra7xx: Fix counter frequency drift for AM572x errata i856. |
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On 12/17/2014 05:27 PM, Lennart Sorensen wrote: > On Wed, Dec 17, 2014 at 09:22:25AM -0600, Nishanth Menon wrote: >> A clock mux might do the job? >> >> value 1, 2 , 3 will imply sysclk1 / 610 >> value of 0 implies fixed 32768 >> >> soemthing like >> sys_clk32_crystal { >> compatible = "fixed-clock"; >> clock-frequency = <32768>; >> } >> >> sys_clk32_pseudo { >> compatible = "fixed-clock"; >> compatible = "fixed-factor-clock"; >> clocks = <&sys_clkin1>; >> clock-mult = <1>; >> clock-div = <610>; >> } >> >> sys_32k_ck: sys_32k_ck { >> compatible = "ti,mux-clock"; >> clocks = <&sys_clk32_crystal>, <&sys_clk32_pseudo>, <&sys_clk32_pseudo>, <&sys_clk32_pseudo>; >> }; >> >> I think... The only issue is that the BOOTSTRAP register is not around >> the usual CM1,2 address region... > > OK, I like where that idea is headed. That looks promising. >
Yea clock mux can be used. However, we don't have support for DRA7 control module clocks in the DT yet. I have posted patches with support towards this a couple of weeks back, but they need some revising.
Thus, we maybe need to apply the timer patches as is for now, and fix the clock tree a bit later.
-Tero
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