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Wed, 05 Nov 2025 04:11:49 -0800 (PST) Message-ID: Subject: Re: [PATCH v3 3/3] gpio: gpio-ltc4283: Add support for the LTC4283 Swap Controller From: Nuno =?ISO-8859-1?Q?S=E1?= To: Bartosz Golaszewski , nuno.sa@analog.com Cc: linux-hwmon@vger.kernel.org, linux-gpio@vger.kernel.org, devicetree@vger.kernel.org, linux-doc@vger.kernel.org, Krzysztof Kozlowski , Conor Dooley , Jean Delvare , Guenter Roeck , Jonathan Corbet , Linus Walleij Date: Wed, 05 Nov 2025 12:12:25 +0000 In-Reply-To: References: <20251104-ltc4283-support-v3-0-4bea496f791d@analog.com> <20251104-ltc4283-support-v3-3-4bea496f791d@analog.com> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable User-Agent: Evolution 3.58.1 Precedence: bulk X-Mailing-List: linux-gpio@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 On Wed, 2025-11-05 at 12:13 +0100, Bartosz Golaszewski wrote: > On Tue, Nov 4, 2025 at 11:31=E2=80=AFAM Nuno S=C3=A1 via B4 Relay > wrote: > >=20 > > From: Nuno S=C3=A1 > >=20 > > The LTC4283 device has up to 8 pins that can be configured as GPIOs. > >=20 > > Note that PGIO pins are not set as GPIOs by default so if they are > > configured to be used as GPIOs we need to make sure to initialize them > > to a sane default. They are set as inputs by default. > >=20 > > Signed-off-by: Nuno S=C3=A1 > > --- > > =C2=A0MAINTAINERS=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 |=C2=A0=C2=A0 2 + > > =C2=A0drivers/gpio/Kconfig=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 |= =C2=A0 15 +++ > > =C2=A0drivers/gpio/Makefile=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 |=C2=A0= =C2=A0 1 + > > =C2=A0drivers/gpio/gpio-ltc4283.c | 217 +++++++++++++++++++++++++++++++= +++++++++++++ > > =C2=A04 files changed, 235 insertions(+) > >=20 > > diff --git a/MAINTAINERS b/MAINTAINERS > > index d02fdf0a0593..76a659408c8c 100644 > > --- a/MAINTAINERS > > +++ b/MAINTAINERS > > @@ -14757,9 +14757,11 @@ F:=C2=A0=C2=A0=C2=A0=C2=A0 drivers/hwmon/ltc42= 82.c > >=20 > > =C2=A0LTC4283 HARDWARE MONITOR AND GPIO DRIVER > > =C2=A0M:=C2=A0=C2=A0=C2=A0=C2=A0 Nuno S=C3=A1 > > +L:=C2=A0=C2=A0=C2=A0=C2=A0 linux-gpio@vger.kernel.org > > =C2=A0L:=C2=A0=C2=A0=C2=A0=C2=A0 linux-hwmon@vger.kernel.org > > =C2=A0S:=C2=A0=C2=A0=C2=A0=C2=A0 Supported > > =C2=A0F:=C2=A0=C2=A0=C2=A0=C2=A0 Documentation/devicetree/bindings/hwmo= n/adi,ltc4283.yaml > > +F:=C2=A0=C2=A0=C2=A0=C2=A0 drivers/gpio/gpio-ltc4283.c > > =C2=A0F:=C2=A0=C2=A0=C2=A0=C2=A0 drivers/hwmon/ltc4283.c > >=20 > > =C2=A0LTC4286 HARDWARE MONITOR DRIVER > > diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig > > index 7ee3afbc2b05..58610f77a75e 100644 > > --- a/drivers/gpio/Kconfig > > +++ b/drivers/gpio/Kconfig > > @@ -1741,6 +1741,21 @@ config GPIO_WM8994 > >=20 > > =C2=A0endmenu > >=20 > > +menu "AUXBUS GPIO expanders" > > +=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 depends on AUXILIARY_BUS > > + >=20 > Please call the section "Auxiliary Bus GPIO drivers" >=20 > It's not very clear what "AUXBUS" is. >=20 > > +config GPIO_LTC4283 > > +=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 tristate "Analog Devices LTC4283 = GPIO support" > > +=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 depends on SENSORS_LTC4283 > > +=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 help > > +=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 If you say yes here y= ou want the GPIO function available in Analog > > +=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 Devices LTC4283 Negat= ive Voltage Hot Swap Controller. > > + > > +=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 This driver can also = be built as a module. If so, the module will > > +=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 be called gpio-ltc428= 3. > > + > > +endmenu > > + > > =C2=A0menu "PCI GPIO expanders" > > =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 depends on PCI > >=20 > > diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile > > index ec296fa14bfd..b6550944ed78 100644 > > --- a/drivers/gpio/Makefile > > +++ b/drivers/gpio/Makefile > > @@ -99,6 +99,7 @@ obj-$(CONFIG_GPIO_LP873X)=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 +=3D gpio-lp873x.o > > =C2=A0obj-$(CONFIG_GPIO_LP87565)=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 +=3D gpio-lp87565.o > > =C2=A0obj-$(CONFIG_GPIO_LPC18XX)=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 +=3D gpio-lpc18xx.o > > =C2=A0obj-$(CONFIG_GPIO_LPC32XX)=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 +=3D gpio-lpc32xx.o > > +obj-$(CONFIG_GPIO_LTC4283)=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 +=3D gpio-ltc4283.o > > =C2=A0obj-$(CONFIG_GPIO_MACSMC)=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 +=3D gpio-macsmc.o > > =C2=A0obj-$(CONFIG_GPIO_MADERA)=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 +=3D gpio-madera.o > > =C2=A0obj-$(CONFIG_GPIO_MAX3191X)=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 +=3D gpio-max3191x.o > > diff --git a/drivers/gpio/gpio-ltc4283.c b/drivers/gpio/gpio-ltc4283.c > > new file mode 100644 > > index 000000000000..885af67146a8 > > --- /dev/null > > +++ b/drivers/gpio/gpio-ltc4283.c > > @@ -0,0 +1,217 @@ > > +// SPDX-License-Identifier: GPL-2.0-only > > +/* > > + * Analog Devices LTC4283 GPIO driver > > + * > > + * Copyright 2025 Analog Devices Inc. > > + */ >=20 > Add a newline. >=20 > > +#include > > +#include > > +#include > > +#include > > +#include > > +#include > > +#include >=20 > In ASCII '_' sorts before 'u'. >=20 > With that fixed: >=20 > Acked-by: Bartosz Golaszewski Thx, will change it on v4 - Nuno S=C3=A1