Re: [PATCH v7 06/11] pinctrl: rp1: Implement RaspberryPi RP1 gpio support

Andrea della Porta
2025-02-11T13:45:56Z

Hi Stefan,

On 15:36 Sat 08 Feb , Stefan Wahren wrote:
> Hi Andrea,
>
> Am 07.02.25 um 22:31 schrieb Andrea della Porta:
> > The RP1 is an MFD supporting a gpio controller and /pinmux/pinctrl.
> > Add minimum support for the gpio only portion. The driver is in
> > pinctrl folder since upcoming patches will add the pinmux/pinctrl
> > support where the gpio part can be seen as an addition.
> >
> > Signed-off-by: Andrea della Porta <andrea.porta@suse.com>
> > Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
> > Reviewed-by: Stefan Wahren <wahrenst@gmx.net>
> > ---
> > MAINTAINERS | 1 +
> > drivers/pinctrl/Kconfig | 11 +
> > drivers/pinctrl/Makefile | 1 +
> > drivers/pinctrl/pinctrl-rp1.c | 789 ++++++++++++++++++++++++++++++++++
> > 4 files changed, 802 insertions(+)
> > create mode 100644 drivers/pinctrl/pinctrl-rp1.c
> >
> > diff --git a/MAINTAINERS b/MAINTAINERS
> > index a4a9555c07c5..f2ba6f565d30 100644
> > --- a/MAINTAINERS
> > +++ b/MAINTAINERS
> > @@ -19756,6 +19756,7 @@ F: Documentation/devicetree/bindings/misc/pci1de4,1.yaml
> > F: Documentation/devicetree/bindings/pci/pci-ep-bus.yaml
> > F: Documentation/devicetree/bindings/pinctrl/raspberrypi,rp1-gpio.yaml
> > F: drivers/clk/clk-rp1.c
> > +F: drivers/pinctrl/pinctrl-rp1.c
> > F: include/dt-bindings/clock/rp1.h
> > F: include/dt-bindings/misc/rp1.h
> >
> > diff --git a/drivers/pinctrl/Kconfig b/drivers/pinctrl/Kconfig
> > index 95a8e2b9a614..53b265cabc26 100644
> > --- a/drivers/pinctrl/Kconfig
> > +++ b/drivers/pinctrl/Kconfig
> > @@ -612,6 +612,17 @@ config PINCTRL_MLXBF3
> > each pin. This driver can also be built as a module called
> > pinctrl-mlxbf3.
> >
> > +config PINCTRL_RP1
> > + tristate "Pinctrl driver for RP1"
> > + depends on MISC_RP1
> > + default MISC_RP1
> > + select PINMUX
> > + select PINCONF
> > + select GENERIC_PINCONF
> > + help
> > + Enable the gpio and pinctrl/mux driver for RaspberryPi RP1
> > + multi function device.
> > +
> > source "drivers/pinctrl/actions/Kconfig"
> > source "drivers/pinctrl/aspeed/Kconfig"
> > source "drivers/pinctrl/bcm/Kconfig"
> > diff --git a/drivers/pinctrl/Makefile b/drivers/pinctrl/Makefile
> > index fba1c56624c0..6fb77de58545 100644
> > --- a/drivers/pinctrl/Makefile
> > +++ b/drivers/pinctrl/Makefile
> > @@ -48,6 +48,7 @@ obj-$(CONFIG_PINCTRL_PIC32) += pinctrl-pic32.o
> > obj-$(CONFIG_PINCTRL_PISTACHIO) += pinctrl-pistachio.o
> > obj-$(CONFIG_PINCTRL_RK805) += pinctrl-rk805.o
> > obj-$(CONFIG_PINCTRL_ROCKCHIP) += pinctrl-rockchip.o
> > +obj-$(CONFIG_PINCTRL_RP1) += pinctrl-rp1.o
> > obj-$(CONFIG_PINCTRL_SCMI) += pinctrl-scmi.o
> > obj-$(CONFIG_PINCTRL_SINGLE) += pinctrl-single.o
> > obj-$(CONFIG_PINCTRL_ST) += pinctrl-st.o
> > diff --git a/drivers/pinctrl/pinctrl-rp1.c b/drivers/pinctrl/pinctrl-rp1.c
> > new file mode 100644
> > index 000000000000..0d081f75d2ec
> > --- /dev/null
> > +++ b/drivers/pinctrl/pinctrl-rp1.c
> > @@ -0,0 +1,789 @@
> > +// SPDX-License-Identifier: GPL-2.0
> > +/*
> > + * Driver for Raspberry Pi RP1 GPIO unit
> > + *
> > + * Copyright (C) 2023 Raspberry Pi Ltd.
> > + *
> > + * This driver is inspired by:
> > + * pinctrl-bcm2835.c, please see original file for copyright information
> > + */
> > +
> ...
> > +
> > +static struct irq_chip rp1_gpio_irq_chip = {
> > + .name = MODULE_NAME,
> > + .irq_enable = rp1_gpio_irq_enable,
> > + .irq_disable = rp1_gpio_irq_disable,
> > + .irq_set_type = rp1_gpio_irq_set_type,
> > + .irq_ack = rp1_gpio_irq_ack,
> > + .irq_mask = rp1_gpio_irq_disable,
> > + .irq_unmask = rp1_gpio_irq_enable,
> > + .flags = IRQCHIP_IMMUTABLE,
> Sorry not sure, but doesn't this miss GPIOCHIP_IRQ_RESOURCE_HELPERS here?

Right. Added.

Thanks,
Andrea

>
> Thanks