.\"	$OpenBSD: mpfgpio.4,v 1.1 2022/02/18 10:51:43 visa Exp $
.\"
.\" Copyright (c) 2022 Visa Hankala
.\"
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.\" purpose with or without fee is hereby granted, provided that the above
.\" copyright notice and this permission notice appear in all copies.
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.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
.\"
.Dd $Mdocdate: February 18 2022 $
.Dt MPFGPIO 4 riscv64
.Os
.Sh NAME
.Nm mpfgpio
.Nd Microchip PolarFire SoC MSS GPIO controller
.Sh SYNOPSIS
.Cd "mpfgpio* at fdt?"
.Cd "gpio* at mpfgpio?"
.Sh DESCRIPTION
The
.Nm
driver provides support for the Microchip PolarFire SoC MSS GPIO controller.
.Pp
The PolarFire SoC MSS has three GPIO units:
.Dv GPIO_0 ,
.Dv GPIO_1
and
.Dv GPIO_2 .
.Dv GPIO_0
and
.Dv GPIO_1
control up to 14 and 24 IOs, respectively.
These IOs are routed through IOMUXes.
.Dv GPIO_2
controls up to 32 IOs through the FPGA fabric.
.Pp
The IOs can be configured as either inputs or outputs,
and accessed using
.Xr gpioctl 8 .
.Sh SEE ALSO
.Xr gpio 4 ,
.Xr intro 4 ,
.Xr gpioctl 8
.Sh HISTORY
The
.Nm
driver first appeared in
.Ox 7.1 .