[6.17] backport gpio patches for Tegra 256, tegra 186, tegra410 Edit

Documentation/devicetree/bindings/gpio/nvidia,tegra186-gpio.yaml

@@ -85,6 +85,7 @@ properties:
       - nvidia,tegra194-gpio-aon
       - nvidia,tegra234-gpio
       - nvidia,tegra234-gpio-aon
+      - nvidia,tegra256-gpio
 
   reg-names:
     items:
@@ -155,6 +156,7 @@ allOf:
               - nvidia,tegra186-gpio
               - nvidia,tegra194-gpio
               - nvidia,tegra234-gpio
+              - nvidia,tegra256-gpio
     then:
       properties:
         interrupts:

drivers/gpio/gpio-tegra186.c

@@ -20,6 +20,7 @@
 #include <dt-bindings/gpio/tegra194-gpio.h>
 #include <dt-bindings/gpio/tegra234-gpio.h>
 #include <dt-bindings/gpio/tegra241-gpio.h>
+#include <dt-bindings/gpio/tegra256-gpio.h>
 
 /* security registers */
 #define TEGRA186_GPIO_CTL_SCR 0x0c
@@ -108,6 +109,7 @@ struct tegra_gpio_soc {
 	const struct tegra_gpio_port *ports;
 	unsigned int num_ports;
 	const char *name;
+	const char *prefix;
 	unsigned int instance;
 
 	unsigned int num_irqs_per_bank;
@@ -939,8 +941,12 @@ static int tegra186_gpio_probe(struct platform_device *pdev)
 		char *name;
 
 		for (j = 0; j < port->pins; j++) {
-			name = devm_kasprintf(gpio->gpio.parent, GFP_KERNEL,
-					      "P%s.%02x", port->name, j);
+			if (gpio->soc->prefix)
+				name = devm_kasprintf(gpio->gpio.parent, GFP_KERNEL, "%s-P%s.%02x",
+						      gpio->soc->prefix, port->name, j);
+			else
+				name = devm_kasprintf(gpio->gpio.parent, GFP_KERNEL, "P%s.%02x",
+						      port->name, j);
 			if (!name)
 				return -ENOMEM;
 
@@ -1271,6 +1277,25 @@ static const struct tegra_gpio_soc tegra241_aon_soc = {
 	.has_vm_support = false,
 };
 
+#define TEGRA256_MAIN_GPIO_PORT(_name, _bank, _port, _pins) \
+	TEGRA_GPIO_PORT(TEGRA256_MAIN, _name, _bank, _port, _pins)
+
+static const struct tegra_gpio_port tegra256_main_ports[] = {
+	TEGRA256_MAIN_GPIO_PORT(A, 0, 0, 8),
+	TEGRA256_MAIN_GPIO_PORT(B, 0, 1, 8),
+	TEGRA256_MAIN_GPIO_PORT(C, 0, 2, 8),
+	TEGRA256_MAIN_GPIO_PORT(D, 0, 3, 8),
+};
+
+static const struct tegra_gpio_soc tegra256_main_soc = {
+	.num_ports = ARRAY_SIZE(tegra256_main_ports),
+	.ports = tegra256_main_ports,
+	.name = "tegra256-gpio-main",
+	.instance = 1,
+	.num_irqs_per_bank = 8,
+	.has_vm_support = true,
+};
+
 #define TEGRA410_COMPUTE_GPIO_PORT(_name, _bank, _port, _pins)	\
 	TEGRA_GPIO_PORT(TEGRA410_COMPUTE, _name, _bank, _port, _pins)
 
@@ -1286,6 +1311,7 @@ static const struct tegra_gpio_soc tegra410_compute_soc = {
 	.num_ports = ARRAY_SIZE(tegra410_compute_ports),
 	.ports = tegra410_compute_ports,
 	.name = "tegra410-gpio-compute",
+	.prefix = "COMPUTE",
 	.num_irqs_per_bank = 8,
 	.instance = 0,
 };
@@ -1315,6 +1341,7 @@ static const struct tegra_gpio_soc tegra410_system_soc = {
 	.num_ports = ARRAY_SIZE(tegra410_system_ports),
 	.ports = tegra410_system_ports,
 	.name = "tegra410-gpio-system",
+	.prefix = "SYSTEM",
 	.num_irqs_per_bank = 8,
 	.instance = 0,
 };
@@ -1338,6 +1365,9 @@ static const struct of_device_id tegra186_gpio_of_match[] = {
 	}, {
 		.compatible = "nvidia,tegra234-gpio-aon",
 		.data = &tegra234_aon_soc
+	}, {
+		.compatible = "nvidia,tegra256-gpio",
+		.data = &tegra256_main_soc
 	}, {
 		/* sentinel */
 	}

include/dt-bindings/gpio/tegra256-gpio.h

@@ -0,0 +1,28 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* Copyright (c) 2025, NVIDIA CORPORATION. All rights reserved. */
+
+/*
+ * This header provides constants for the nvidia,tegra256-gpio DT binding.
+ *
+ * The first cell in Tegra's GPIO specifier is the GPIO ID.
+ * The macros below provide names for this.
+ *
+ * The second cell contains standard flag values specified in gpio.h.
+ */
+
+#ifndef _DT_BINDINGS_GPIO_TEGRA256_GPIO_H
+#define _DT_BINDINGS_GPIO_TEGRA256_GPIO_H
+
+#include <dt-bindings/gpio/gpio.h>
+
+/* GPIOs implemented by main GPIO controller */
+#define TEGRA256_MAIN_GPIO_PORT_A 0
+#define TEGRA256_MAIN_GPIO_PORT_B 1
+#define TEGRA256_MAIN_GPIO_PORT_C 2
+#define TEGRA256_MAIN_GPIO_PORT_D 3
+
+#define TEGRA256_MAIN_GPIO(port, offset) \
+		((TEGRA256_MAIN_GPIO_PORT_##port * 8) + (offset))
+
+#endif
+