Hi Greg,
On Wed, Jan 18, 2017 at 8:03 AM, <gregkh@xxxxxxxxxxxxxxxxxxx> wrote:
> This is a note to let you know that I've just added the patch titled
>
> pinctrl: sh-pfc: Add helper to handle bias lookup table
Ah, you already found this was the missing dependency for "pinctrl: sh-pfc:
r8a7795: Use lookup function for bias data".
Sorry for not realizing that before.
BTW, if "/sys/kernel/debug/pinctrl/" falls under "user-visible" issues, you
may want to add commit 5d7400c4acbf7fe6 ("pinctrl: sh-pfc: Do not
unconditionally support PIN_CONFIG_BIAS_DISABLE"), too.
Thanks!
> to the 4.9-stable tree which can be found at:
> http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
>
> The filename of the patch is:
> pinctrl-sh-pfc-add-helper-to-handle-bias-lookup-table.patch
> and it can be found in the queue-4.9 subdirectory.
>
> If you, or anyone else, feels it should not be added to the stable tree,
> please let <stable@xxxxxxxxxxxxxxx> know about it.
>
>
> From c314c9f15aa5f43f0e5c0e2602cc65798dbd1598 Mon Sep 17 00:00:00 2001
> From: =?UTF-8?q?Niklas=20S=C3=B6derlund?=
> <niklas.soderlund+renesas@xxxxxxxxxxxx>
> Date: Sat, 12 Nov 2016 17:04:25 +0100
> Subject: pinctrl: sh-pfc: Add helper to handle bias lookup table
> MIME-Version: 1.0
> Content-Type: text/plain; charset=UTF-8
> Content-Transfer-Encoding: 8bit
>
> From: Niklas Söderlund <niklas.soderlund+renesas@xxxxxxxxxxxx>
>
> commit c314c9f15aa5f43f0e5c0e2602cc65798dbd1598 upstream.
>
> On some SoC there are no simple mapping of pins to bias register bits
> and a lookup table is needed. This logic is already implemented in some
> SoC specific drivers that could benefit from a generic implementation.
>
> Add helpers to deal with the lookup which later can be used by the SoC
> specific drivers. The logic used to lookup are different from the one it
> aims to replace, this is intentional. This new method reduces the memory
> consumption at the cost of increased CPU usage and fix a bug where a
> WARN() would incorrectly be triggered if the register offset is 0.
>
> Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@xxxxxxxxxxxx>
> Reviewed-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
> Signed-off-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
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