From: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
To: jbrunet@baylibre.com, linux-amlogic@lists.infradead.org,
linux-clk@vger.kernel.org
Cc: narmstrong@baylibre.com, sboyd@kernel.org,
mturquette@baylibre.com, linux-kernel@vger.kernel.org,
Martin Blumenstingl <martin.blumenstingl@googlemail.com>,
linux-arm-kernel@lists.infradead.org
Subject: [PATCH v2 0/4] clk: meson8b: updates for video clocks / resets
Date: Fri, 17 Apr 2020 20:41:23 +0200 [thread overview]
Message-ID: <20200417184127.1319871-1-martin.blumenstingl@googlemail.com> (raw)
This is the first batch of fixes and updates for the Meson8/8b/8m2
clock controller driver.
The first patch fixes the video clock hierarchy. Special thanks to
Neil for providing a lot of details about the video clock tree!
The second and third came up while testing video output on my EC-100
(Endless Mini). This board is special because u-boot does not enable
the video outputs like most other u-boot versions do. However, this
is very useful for development because it shows (the hard way ;))
where the existing code is buggy.
The last patch is a small improvement for the VPU clock so we
utilize the glitch-free mux (on SoCs which support it) and avoid
problems by changing the "live" clock tree at runtime (with the mali
clock this resulted in system hangs/freezes).
In my opinion all of these patches - including the fixes - can go to
"next" because the relevant clock trees are still read-only.
Changes since v1 at [0]:
- updated the description in patch #1 to clarify that (it seems that)
there is no fixed pre-multiplier for the HDMI PLL (like on GXL for
example). Spotted by Jerome - thanks!
- simplified the logic for the active_low resets in patch #2 by
shortening the if ... else. Thanks to Jerome for the suggestion.
[0] https://patchwork.kernel.org/cover/11489079/
Martin Blumenstingl (4):
clk: meson: meson8b: Fix the first parent of vid_pll_in_sel
clk: meson: meson8b: Fix the polarity of the RESET_N lines
clk: meson: meson8b: Fix the vclk_div{1,2,4,6,12}_en gate bits
clk: meson: meson8b: Make the CCF use the glitch-free VPU mux
drivers/clk/meson/meson8b.c | 105 +++++++++++++++++++++++++-----------
1 file changed, 73 insertions(+), 32 deletions(-)
--
2.26.1
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next reply other threads:[~2020-04-17 18:41 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-17 18:41 Martin Blumenstingl [this message]
2020-04-17 18:41 ` [PATCH v2 1/4] clk: meson: meson8b: Fix the first parent of vid_pll_in_sel Martin Blumenstingl
2020-04-17 18:41 ` [PATCH v2 2/4] clk: meson: meson8b: Fix the polarity of the RESET_N lines Martin Blumenstingl
2020-04-17 18:41 ` [PATCH v2 3/4] clk: meson: meson8b: Fix the vclk_div{1, 2, 4, 6, 12}_en gate bits Martin Blumenstingl
2020-04-17 18:41 ` [PATCH v2 4/4] clk: meson: meson8b: Make the CCF use the glitch-free VPU mux Martin Blumenstingl
2020-04-29 11:44 ` [PATCH v2 0/4] clk: meson8b: updates for video clocks / resets Jerome Brunet
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20200417184127.1319871-1-martin.blumenstingl@googlemail.com \
--to=martin.blumenstingl@googlemail.com \
--cc=jbrunet@baylibre.com \
--cc=linux-amlogic@lists.infradead.org \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-clk@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=mturquette@baylibre.com \
--cc=narmstrong@baylibre.com \
--cc=sboyd@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).