From 0caeacb1169193b31f0a00e3b1cb2ba452ca2da4 Mon Sep 17 00:00:00 2001
From: Geert Uytterhoeven <geert@linux-m68k.org>
Date: Wed, 1 Jul 2026 12:11:38 +0200
Subject: [PATCH] MIPS: TXX9: rbtx4927: Use GPIO lookup table for SIO DTR

Convert SIO DTR handling from legacy GPIO calls to GPIO descriptors
using a GPIO lookup table.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Reviewed-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
Reviewed-by: Linus Walleij <linusw@kernel.org>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
---
 arch/mips/txx9/rbtx4927/setup.c | 16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)

diff --git a/arch/mips/txx9/rbtx4927/setup.c b/arch/mips/txx9/rbtx4927/setup.c
index 31955c1d5555..e57c409c318c 100644
--- a/arch/mips/txx9/rbtx4927/setup.c
+++ b/arch/mips/txx9/rbtx4927/setup.c
@@ -49,6 +49,7 @@
 #include <linux/platform_device.h>
 #include <linux/delay.h>
 #include <linux/gpio.h>
+#include <linux/gpio/machine.h>
 #include <linux/leds.h>
 #include <asm/io.h>
 #include <asm/reboot.h>
@@ -157,11 +158,20 @@ static inline void tx4927_pci_setup(void) {}
 static inline void tx4937_pci_setup(void) {}
 #endif /* CONFIG_PCI */
 
+/* TX4927-SIO DTR on (PIO[15]) */
+GPIO_LOOKUP_SINGLE(sio_gpio_table, NULL, "TXx9", 15, "sio-dtr",
+		   GPIO_ACTIVE_HIGH);
+
 static void __init rbtx4927_gpio_init(void)
 {
-	/* TX4927-SIO DTR on (PIO[15]) */
-	gpio_request(15, "sio-dtr");
-	gpio_direction_output(15, 1);
+	struct gpio_desc *d;
+
+	gpiod_add_lookup_table(&sio_gpio_table);
+	d = gpiod_get(NULL, "sio-dtr", GPIOD_OUT_HIGH);
+	if (IS_ERR(d))
+		pr_err("Unable to get sio-dtr GPIO descriptor\n");
+	else
+		gpiod_put(d);
 
 	tx4927_sio_init(0, 0);
 }