From: Jerome Brunet <jbrunet@baylibre.com>
To: Neil Armstrong <narmstrong@baylibre.com>
Cc: Kevin Hilman <khilman@baylibre.com>,
Carlo Caione <carlo@caione.org>,
Michael Turquette <mturquette@baylibre.com>,
Stephen Boyd <sboyd@codeaurora.org>,
linux-amlogic@lists.infradead.org, linux-clk@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2 0/9] clk: meson: pll fixes
Date: Tue, 30 Jan 2018 20:10:57 +0100 [thread overview]
Message-ID: <1517339457.3153.9.camel@baylibre.com> (raw)
In-Reply-To: <20180119155529.11532-1-jbrunet@baylibre.com>
On Fri, 2018-01-19 at 16:55 +0100, Jerome Brunet wrote:
> This changeset is a collection of fixes and clean-up around the pll clock
> provider. This has been triggered by the discussion around the ethernet
> clock on the axg [0].
>
> On the axg the rate reported by the fixed_pll is off by 8Mhz, which leads
> the internal mux of the ethernet driver to pick an mpll2 instead of the
> fdiv4.
>
> With this series applied, the fixed_pll of the axg now reports
> 1999998046 Hz, which is coherent with measurements (~2GHz)
>
> While debugging this, we uncovered quite a mess around the hdmi_pll
> of the gxbb and gxl family. This is also fixed by this series.
>
> Last, the parameters table provided to the read-only sys_plls have
> been removed, saving a bit of memory
>
> There is still work to be done on this clock provider. Someday,
> I hope to see the parameter tables go away completely. This pll
> is just a (quite complex) fractional divider, we sould be able to
> figure something out at runtime.
>
> Changes since v1: [1]
> * fix several typos in the comments
> * fix arm32 u64 math in patch 3 (Thanks a lot Martin!!)
>
> [0]: https://lkml.kernel.org/r/1516095424.2608.36.camel@baylibre.com
> [1]: https://lkml.kernel.org/r/20180118184532.6856-1-jbrunet@baylibre.com
Series applied clk-meson next/drivers
prev parent reply other threads:[~2018-01-30 19:11 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-01-19 15:55 [PATCH v2 0/9] clk: meson: pll fixes Jerome Brunet
2018-01-19 15:55 ` [PATCH v2 1/9] clk: meson: check pll rate param table before using it Jerome Brunet
2018-01-19 15:55 ` [PATCH v2 2/9] clk: meson: remove useless pll rate params tables Jerome Brunet
2018-01-19 15:55 ` [PATCH v2 3/9] clk: meson: remove unnecessary rounding in the pll clock Jerome Brunet
2018-01-19 15:55 ` [PATCH v2 4/9] clk: meson: use the frac parameter width instead of a constant Jerome Brunet
2018-01-19 15:55 ` [PATCH v2 5/9] clk: meson: add od3 to the pll driver Jerome Brunet
2018-01-19 15:55 ` [PATCH v2 6/9] clk: meson: add the gxl hdmi pll Jerome Brunet
2018-01-19 15:55 ` [PATCH v2 7/9] clk: meson: fix rate calculation of plls with a fractional part Jerome Brunet
2018-01-19 15:55 ` [PATCH v2 8/9] clk: meson: gxbb: add the fractional part of the fixed_pll Jerome Brunet
2018-01-19 15:55 ` [PATCH v2 9/9] clk: meson: axg: " Jerome Brunet
2018-01-30 19:10 ` Jerome Brunet [this message]
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