Messages in this thread | | | Date | Tue, 2 Jun 2015 16:54:10 +0530 | From | Vignesh R <> | Subject | Re: [PATCH 2/5] ARM: OMAP2+: DRA7: Add hwmod entries for PWMSS |
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Hi Tero,
On Tuesday 02 June 2015 01:51 PM, Tero Kristo wrote: > On 06/01/2015 02:53 PM, Vignesh R wrote: >> Add hwmod entries for the PWMSS on DRA7. > > Can you provide some documentation references for this data? > > I was looking at the TRM and at least the main_clk selection is somewhat > unclear to me.
As per AM57x TRM SPRUHZ6, October 2014, Section 29.1.3 Table 29-4. source signal as L4PER2_L3_GICLK but it is actually equal to L4PER2_L3_GICLK/2. l4_root_clock_div is fixed-factored clock equal to L4PER2_L3_GICLK/2 (l3_iclk_div/2 in Linux clock dt). The TRM does'nt show factor of by 2. I will forward you an internal documentation that talks about this.
I also measured the frequencies of PWM waveforms using oscilloscope and it matches above observation.
I will update the patch description in v2.
Regards Vignesh
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