Commit ec648f6b authored by Emil Renner Berthing's avatar Emil Renner Berthing
Browse files

pinctrl: starfive: Add pinctrl driver for StarFive SoCs 

Add a combined pinctrl and GPIO driver for the JH7100 RISC-V SoC by
StarFive Ltd. This is a test chip for their upcoming JH7110 SoC, which
is said to feature only minor changes to these pinctrl/GPIO parts.

For each "GPIO" there are two registers for configuring the output and
output enable signals which may come from other peripherals. Among these
are two special signals that are constant 0 and constant 1 respectively.
Controlling the GPIOs from software is done by choosing one of these
signals. In other words the same registers are used for both pin muxing
and controlling the GPIOs, which makes it easier to combine the pinctrl
and GPIO driver in one.

I wrote the pinconf and pinmux parts, but the GPIO part of the code is
based on the GPIO driver in the vendor tree written by Huan Feng with
cleanups and fixes by Drew and me.

Datasheet: https://github.com/starfive-tech/JH7100_Docs/blob/main/JH7100%20Data%20Sheet%20V01.01.04-EN%20(4-21-2021).pdf


Reviewed-by: default avatarAndy Shevchenko <andy.shevchenko@gmail.com>
Reviewed-by: default avatarLinus Walleij <linus.walleij@linaro.org>
Co-developed-by: default avatarHuan Feng <huan.feng@starfivetech.com>
Signed-off-by: default avatarHuan Feng <huan.feng@starfivetech.com>
Co-developed-by: default avatarDrew Fustini <drew@beagleboard.org>
Signed-off-by: default avatarDrew Fustini <drew@beagleboard.org>
Signed-off-by: default avatarEmil Renner Berthing <kernel@esmil.dk>
parent 7431b391

MAINTAINERS

+8 −0
Original line number Diff line number Diff line
@@ -18137,6 +18137,14 @@ F: Documentation/devicetree/bindings/clock/starfive,jh7100-clkgen.yaml 
F:	drivers/clk/starfive/clk-starfive-jh7100.c

F:	include/dt-bindings/clock/starfive-jh7100.h









STARFIVE JH7100 PINCTRL DRIVER









M:	Emil Renner Berthing <kernel@esmil.dk>









L:	linux-gpio@vger.kernel.org









S:	Maintained









F:	Documentation/devicetree/bindings/pinctrl/starfive,jh7100-pinctrl.yaml









F:	drivers/pinctrl/pinctrl-starfive.c









F:	include/dt-bindings/pinctrl/pinctrl-starfive.h

















STARFIVE JH7100 RESET CONTROLLER DRIVER









M:	Emil Renner Berthing <kernel@esmil.dk>









S:	Maintained

























drivers/pinctrl/Kconfig



+17
−0






























Original line number
Diff line number
Diff line







@@ -281,6 +281,23 @@ config PINCTRL_ST







	select PINCONF









	select GPIOLIB_IRQCHIP



















config PINCTRL_STARFIVE









	tristate "Pinctrl and GPIO driver for the StarFive JH7100 SoC"









	depends on SOC_STARFIVE || COMPILE_TEST









	depends on OF









	default SOC_STARFIVE









	select GENERIC_PINCTRL_GROUPS









	select GENERIC_PINMUX_FUNCTIONS









	select GENERIC_PINCONF









	select GPIOLIB









	select GPIOLIB_IRQCHIP









	select OF_GPIO









	help









	  Say yes here to support pin control on the StarFive JH7100 SoC.









	  This also provides an interface to the GPIO pins not used by other









	  peripherals supporting inputs, outputs, configuring pull-up/pull-down









	  and interrupts on input changes.



















config PINCTRL_STMFX









	tristate "STMicroelectronics STMFX GPIO expander pinctrl driver"









	depends on I2C
































drivers/pinctrl/Makefile



+1
−0






























Original line number
Diff line number
Diff line







@@ -39,6 +39,7 @@ obj-$(CONFIG_PINCTRL_LANTIQ)	+= pinctrl-lantiq.o







obj-$(CONFIG_PINCTRL_LPC18XX)	+= pinctrl-lpc18xx.o









obj-$(CONFIG_PINCTRL_TB10X)	+= pinctrl-tb10x.o









obj-$(CONFIG_PINCTRL_ST) 	+= pinctrl-st.o









obj-$(CONFIG_PINCTRL_STARFIVE)	+= pinctrl-starfive.o









obj-$(CONFIG_PINCTRL_STMFX) 	+= pinctrl-stmfx.o









obj-$(CONFIG_PINCTRL_ZYNQ)	+= pinctrl-zynq.o









obj-$(CONFIG_PINCTRL_ZYNQMP)	+= pinctrl-zynqmp.o
































drivers/pinctrl/pinctrl-starfive.c
0 → 100644



+1354
−0




























File added.
Preview size limit exceeded, changes collapsed.