[PATCH 0/5] meson_saradc fixes and minor improvements

[Jonathan Cameron]

On Sun, 10 Dec 2017 18:48:56 +0100
Martin Blumenstingl <martin.blumenstingl at googlemail.com> wrote:

> Hi Jonathan,
> 
> On Sat, Dec 2, 2017 at 12:30 PM, Jonathan Cameron <jic23 at kernel.org> wrote:
> > On Mon, 27 Nov 2017 15:47:14 -0800
> > Kevin Hilman <khilman at baylibre.com> wrote:
> >  
> >> Hi Jonathan,
> >>
> >> Jonathan Cameron <Jonathan.Cameron at huawei.com> writes:
> >>  
> >> > On Tue, 31 Oct 2017 21:01:42 +0100
> >> > Martin Blumenstingl <martin.blumenstingl at googlemail.com> wrote:
> >> >  
> >> >> Meson8 and Meson8b require that the driver initializes the registers
> >> >> correctly, while on GXBB and newer this is done by the firmware.
> >> >> Thus the changes from this series are only relevant for Meson8 and
> >> >> Meson8b.
> >> >>
> >> >> The first two patches are bugfixes:
> >> >> - the first patch fixes an issue where the SAR ADC would not work at
> >> >>   all
> >> >> - the second patch initializes the bandgrap register on Meson8 and
> >> >>   Meson8b (which is required for the SAR ADC to operate)
> >> >>
> >> >> The third patch is mainly a cosmetic fix because we don't want to
> >> >> read/write registers that are not documented.
> >> >>
> >> >> Patch four is purely cosmetic so the mainline driver uses the same
> >> >> settings as Amlogic's vendor kernel driver.
> >> >>
> >> >> The last patch initializes the channel muxes. There are sane defaults
> >> >> for these in the hardware itself. However, some bootloaders are
> >> >> setting strange values - the result is that reading the ADC gives
> >> >> garbage values.
> >> >> I did not tag this as "fix" since in my opinion it's a feature for
> >> >> fixing broken bootloaders.
> >> >>
> >> >> Tested on:
> >> >> - a Meson8m2 board (compatible with Meson8)
> >> >> - a Meson8b EC-100
> >> >> - on a Khadas VIM to ensure that the newer SoCs are still working
> >> >>
> >> >>
> >> >> Martin Blumenstingl (5):
> >> >>   iio: adc: meson-saradc: fix the bit_idx of the adc_en clock
> >> >>   iio: adc: meson-saradc: initialize the bandgap correctly on older
> >> >> SoCs iio: adc: meson-saradc: Meson8 and Meson8b do not have REG11 and
> >> >> REG13 iio: adc: meson-saradc: fix the clock frequency on Meson8 and
> >> >> Meson8b iio: adc: meson-saradc: program the channel muxes during
> >> >>     initialization
> >> >>
> >> >>  drivers/iio/adc/meson_saradc.c | 92
> >> >> +++++++++++++++++++++++++++++++++++------- 1 file changed, 78
> >> >> insertions(+), 14 deletions(-)
> >> >>  
> >> > Series seems fine to me.  If no one else raises anything I'll pick this
> >> > up when I'm am back in the UK the week after next.  
> >>
> >> Just a gentle ping on the status of this series as I'm not seeing it in
> >> linux-next.  
> >
> > Sure, I'll be sending out a pull request including the first couple
> > of patches later today at which time they'll hit Greg's tree and show
> > up in linux-next. (patches 1, 2 and 3)
> >
> > The series was a spit of fixes and improvements that will take longer
> > as we'll have to wait for the fixes to go up to mainline and come
> > back to me - so will be a few weeks before I can apply those and they
> > won't hit linux-next for perhaps a week after that.
> > (this covers patches 4 and 5)  
> do you want me to re-send patches 4 and 5 (or do you want to take them
> as they are) now that patches 0-3 are back in linux-next?
I got them from this thread.  Now applied.  Thanks for pointing out
I could now do this.  I'd failed to notice / check yet!

Jonathan

> 
> 
> Regards
> Martin
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