.\"
.\" Copyright (c) 2025 Stephen Hurd <shurd@freebsd.org>
.\"
.\" SPDX-License-Identifier: BSD-2-Clause
.\"
.Dd March 18, 2025
.Dt RK_GRF_GPIO 4
.Os
.Sh NAME
.Nm rk_grf_gpio
.Nd RockChip GPIO_MUTE pin driver
.Sh SYNOPSIS
.Cd "options SOC_ROCKCHIP_rk3328"
.Sh DESCRIPTION
The
.Nm
driver provides a single-pin, output-only
.Xr gpio 3
unit whose single pin is named GPIO_MUTE.
This controls the output of the GPIO_MUTE pin on the SoC.
.Pp
This gpio is usually used to control another device on the board,
so is not usually available for user software.
.Sh HARDWARE
The
.Nm
driver supports the following GRF GPIO controller:
.Pp
.Bl -bullet -compact
.It
rockchip,rk3328-grf-gpio
.El
.Sh HISTORY
The
.Nm
driver first appeared in
.Fx 15.0 .
.Sh AUTHORS
The
.Nm
driver and manual were written by
.An Stephen Hurd Aq Mt shurd@freebsd.org .