Re: [PATCH 1/3] clk: meson: mpll: properly handle spread spectrum

2019-04-01 Thread Martin Blumenstingl
Hi Jerome, On Mon, Apr 1, 2019 at 10:40 AM Jerome Brunet wrote: > > On Sat, 2019-03-30 at 16:56 +0100, Martin Blumenstingl wrote: > > Hi Jerome, > > > > On Sat, Mar 30, 2019 at 12:07 AM Jerome Brunet wrote: > > > On Fri, 2019-03-29 at 20:39 +0100, Martin Blumenstingl wrote: > > > > Hi Jerome, >

Re: [PATCH 1/3] clk: meson: mpll: properly handle spread spectrum

2019-04-01 Thread Jerome Brunet
On Sat, 2019-03-30 at 16:56 +0100, Martin Blumenstingl wrote: > Hi Jerome, > > On Sat, Mar 30, 2019 at 12:07 AM Jerome Brunet wrote: > > On Fri, 2019-03-29 at 20:39 +0100, Martin Blumenstingl wrote: > > > Hi Jerome, > > > > > > On Fri, Mar 29, 2019 at 4:34 PM Jerome Brunet > > > wrote: > > >

Re: [PATCH 1/3] clk: meson: mpll: properly handle spread spectrum

2019-03-30 Thread Martin Blumenstingl
Hi Jerome, On Sat, Mar 30, 2019 at 12:07 AM Jerome Brunet wrote: > > On Fri, 2019-03-29 at 20:39 +0100, Martin Blumenstingl wrote: > > Hi Jerome, > > > > On Fri, Mar 29, 2019 at 4:34 PM Jerome Brunet wrote: > > > The bit 'SSEN' available on some MPLL DSS outputs is not related to the > > >

Re: [PATCH 1/3] clk: meson: mpll: properly handle spread spectrum

2019-03-29 Thread Jerome Brunet
On Fri, 2019-03-29 at 20:39 +0100, Martin Blumenstingl wrote: > Hi Jerome, > > On Fri, Mar 29, 2019 at 4:34 PM Jerome Brunet wrote: > > The bit 'SSEN' available on some MPLL DSS outputs is not related to the > > fractional part of the divider but to the function called > > 'Spread Spectrum'. > >

Re: [PATCH 1/3] clk: meson: mpll: properly handle spread spectrum

2019-03-29 Thread Martin Blumenstingl
Hi Jerome, On Fri, Mar 29, 2019 at 4:34 PM Jerome Brunet wrote: > > The bit 'SSEN' available on some MPLL DSS outputs is not related to the > fractional part of the divider but to the function called > 'Spread Spectrum'. > > This function might be used to solve EM issues by adding a jitter on >

[PATCH 1/3] clk: meson: mpll: properly handle spread spectrum

2019-03-29 Thread Jerome Brunet
The bit 'SSEN' available on some MPLL DSS outputs is not related to the fractional part of the divider but to the function called 'Spread Spectrum'. This function might be used to solve EM issues by adding a jitter on clock signal. This widens the signal spectrum and weakens the peaks in it.