Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
Date:   Mon, 3 Apr 2023 14:06:28 -0400
From:   William Breathitt Gray <william.gray@linaro.org>
To:     Linus Walleij <linus.walleij@linaro.org>,
        Bartosz Golaszewski <brgl@bgdev.pl>
Cc:     linux-gpio@vger.kernel.org, linux-kernel@vger.kernel.org,
        Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Subject: Re: [PATCH v4 0/4] Migrate IDIO-16 GPIO drivers to regmap API
Message-ID: <ZCsVpNmNMDCZBPfl@fedora>
References: <cover.1680296343.git.william.gray@linaro.org>
MIME-Version: 1.0
Content-Type: multipart/signed; micalg=pgp-sha512;
        protocol="application/pgp-signature"; boundary="1brxflNcpEOs0Vcu"
Content-Disposition: inline
In-Reply-To: <cover.1680296343.git.william.gray@linaro.org>
Precedence: bulk


--1brxflNcpEOs0Vcu
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
Content-Transfer-Encoding: quoted-printable

On Fri, Mar 31, 2023 at 05:05:22PM -0400, William Breathitt Gray wrote:
> Changes in v4:
>  - Remove superfluous base check in idio_16_reg_mask_xlate()
>  - Format idio_16_names[] to 8 GPIO per line
>  - Utilize dev_err_probe() in idio_16_regmap_register()
>=20
> The regmap API supports IO port accessors so we can take advantage of
> regmap abstractions rather than handling access to the device registers
> directly in the driver. The 104-idio-16 and pci-idio-16 modules depend
> on the IDIO-16 library and are thus updated accordingly.
>=20
> By leveraging the regmap API, the idio-16 library is reduced to simply a
> devm_idio_16_regmap_register() function and a configuration structure
> struct idio_16_regmap_config.
>=20
> This patchset depends on the "Drop map from handle_mask_sync()
> parameters" patchset [0].
>=20
> [0] https://lore.kernel.org/all/cover.1679323449.git.william.gray@linaro.=
org/
>=20
> William Breathitt Gray (4):
>   gpio: idio-16: Migrate to the regmap API
>   gpio: 104-idio-16: Migrate to the regmap API
>   gpio: pci-idio-16: Migrate to the regmap API
>   gpio: idio-16: Remove unused legacy interface
>=20
>  drivers/gpio/Kconfig            |   7 +-
>  drivers/gpio/gpio-104-idio-16.c | 286 +++++++------------------------
>  drivers/gpio/gpio-idio-16.c     | 254 ++++++++++++++-------------
>  drivers/gpio/gpio-idio-16.h     |  79 +++------
>  drivers/gpio/gpio-pci-idio-16.c | 294 +++++++-------------------------
>  5 files changed, 289 insertions(+), 631 deletions(-)
>=20
>=20
> base-commit: 4ea0c97776bf8c63805eb0f8182d9c20072219d9
> prerequisite-patch-id: cd19046150b7cff1be4ac7152198777aa960a3df
> prerequisite-patch-id: bd3e3830d9ce4f3876a77483364d7190b7fdffa7
> --=20
> 2.39.2

The 104-idio-16 and pci-idio-16 drivers here likely need
use_raw_spinlock enabled for their respective regmap_config structures
to prevent deadlocks as described in the i8255 fixes patchset [0]. I'll
submit a v5 of this patchset to fix that.

[0] https://lore.kernel.org/all/cover.1680543810.git.william.gray@linaro.or=
g/

--1brxflNcpEOs0Vcu
Content-Type: application/pgp-signature; name="signature.asc"

-----BEGIN PGP SIGNATURE-----

iHUEARYKAB0WIQSNN83d4NIlKPjon7a1SFbKvhIjKwUCZCsVpAAKCRC1SFbKvhIj
K/SVAP94BlaQ43teo7R8RFUgamJIROWAUFqiketa0AXmUz9iXQD9GCFVYlof/ycj
3tAq5rphog/cZ7IGPmLQ+dTTfA/Sjg4=
=T640
-----END PGP SIGNATURE-----

--1brxflNcpEOs0Vcu--