From bc1bb80564eef66cef1a7b9791af87ae019aa71d Mon Sep 17 00:00:00 2001
From: Emmanuel Vadot <manu@FreeBSD.org>
Date: Sun, 16 May 2021 14:47:16 +0200
Subject: [PATCH] arm64: rockchip: gpio: Give friendlier name to gpio

By default name the gpio P<bank><bankpin>
This make it easier to find the gpio when reading schematics or DTS.

Sponsored by:	Diablotin Systems
Differential Revision:	https://reviews.freebsd.org/D30287
---
 sys/arm64/rockchip/rk_gpio.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/sys/arm64/rockchip/rk_gpio.c b/sys/arm64/rockchip/rk_gpio.c
index aa44a6bc9e0..d3623b2302e 100644
--- a/sys/arm64/rockchip/rk_gpio.c
+++ b/sys/arm64/rockchip/rk_gpio.c
@@ -209,14 +209,17 @@ static int
 rk_gpio_pin_getname(device_t dev, uint32_t pin, char *name)
 {
 	struct rk_gpio_softc *sc;
+	uint32_t bank;
 
 	sc = device_get_softc(dev);
 
 	if (pin >= 32)
 		return (EINVAL);
 
+	bank = pin / 8;
+	pin = pin - (bank * 8);
 	RK_GPIO_LOCK(sc);
-	snprintf(name, GPIOMAXNAME, "gpio%d", pin);
+	snprintf(name, GPIOMAXNAME, "P%c%d", bank + 'A', pin);
 	RK_GPIO_UNLOCK(sc);
 
 	return (0);