gpio: tegra186: Add support for Tegra264

Extend the existing Tegra186 GPIO controller driver with support for the
GPIO controller found on Tegra264.

Use the "wakeup-parent" phandle from the GPIO device tree node to
ensure the GPIO driver associates with the intended PMC device.
Relying only on compatible-based lookup can select an unexpected
PMC node, so fall back to compatible-based lookup when the phandle
is not present.

Signed-off-by: Prathamesh Shete <pshete@nvidia.com>
Reviewed-by: Jon Hunter <jonathanh@nvidia.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Link: https://patch.msgid.link/20260128085114.1137725-2-pshete@nvidia.com
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>

Author: Prathamesh Shete

drivers/gpio/gpio-tegra186.c

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0-only
 /*
- * Copyright (c) 2016-2025 NVIDIA Corporation
+ * Copyright (c) 2016-2026 NVIDIA Corporation
  *
  * Author: Thierry Reding <treding@nvidia.com>
  *	   Dipen Patel <dpatel@nvidia.com>
@@ -21,6 +21,7 @@
 #include <dt-bindings/gpio/tegra234-gpio.h>
 #include <dt-bindings/gpio/tegra241-gpio.h>
 #include <dt-bindings/gpio/tegra256-gpio.h>
+#include <dt-bindings/gpio/nvidia,tegra264-gpio.h>
 
 /* security registers */
 #define TEGRA186_GPIO_CTL_SCR 0x0c
@@ -1001,7 +1002,9 @@ static int tegra186_gpio_probe(struct platform_device *pdev)
 	if (gpio->soc->num_irqs_per_bank > 1)
 		tegra186_gpio_init_route_mapping(gpio);
 
-	np = of_find_matching_node(NULL, tegra186_pmc_of_match);
+	np = of_parse_phandle(pdev->dev.of_node, "wakeup-parent", 0);
+	if (!np)
+		np = of_find_matching_node(NULL, tegra186_pmc_of_match);
 	if (np) {
 		if (of_device_is_available(np)) {
 			irq->parent_domain = irq_find_host(np);
@@ -1277,6 +1280,80 @@ static const struct tegra_gpio_soc tegra241_aon_soc = {
 	.has_vm_support = false,
 };
 
+#define TEGRA264_MAIN_GPIO_PORT(_name, _bank, _port, _pins) \
+	TEGRA_GPIO_PORT(TEGRA264_MAIN, _name, _bank, _port, _pins)
+
+static const struct tegra_gpio_port tegra264_main_ports[] = {
+	TEGRA264_MAIN_GPIO_PORT(F, 3, 0, 8),
+	TEGRA264_MAIN_GPIO_PORT(G, 3, 1, 5),
+	TEGRA264_MAIN_GPIO_PORT(H, 1, 0, 8),
+	TEGRA264_MAIN_GPIO_PORT(J, 1, 1, 8),
+	TEGRA264_MAIN_GPIO_PORT(K, 1, 2, 8),
+	TEGRA264_MAIN_GPIO_PORT(L, 1, 3, 8),
+	TEGRA264_MAIN_GPIO_PORT(M, 1, 4, 6),
+	TEGRA264_MAIN_GPIO_PORT(P, 2, 0, 8),
+	TEGRA264_MAIN_GPIO_PORT(Q, 2, 1, 8),
+	TEGRA264_MAIN_GPIO_PORT(R, 2, 2, 8),
+	TEGRA264_MAIN_GPIO_PORT(S, 2, 3, 2),
+	TEGRA264_MAIN_GPIO_PORT(T, 0, 0, 7),
+	TEGRA264_MAIN_GPIO_PORT(U, 0, 1, 8),
+	TEGRA264_MAIN_GPIO_PORT(V, 0, 2, 8),
+	TEGRA264_MAIN_GPIO_PORT(W, 0, 3, 8),
+	TEGRA264_MAIN_GPIO_PORT(X, 0, 7, 6),
+	TEGRA264_MAIN_GPIO_PORT(Y, 0, 5, 8),
+	TEGRA264_MAIN_GPIO_PORT(Z, 0, 6, 8),
+	TEGRA264_MAIN_GPIO_PORT(AL, 0, 4, 3),
+};
+
+static const struct tegra_gpio_soc tegra264_main_soc = {
+	.num_ports = ARRAY_SIZE(tegra264_main_ports),
+	.ports = tegra264_main_ports,
+	.name = "tegra264-gpio",
+	.instance = 0,
+	.num_irqs_per_bank = 8,
+	.has_vm_support = true,
+};
+
+#define TEGRA264_AON_GPIO_PORT(_name, _bank, _port, _pins) \
+	TEGRA_GPIO_PORT(TEGRA264_AON, _name, _bank, _port, _pins)
+
+static const struct tegra_gpio_port tegra264_aon_ports[] = {
+	TEGRA264_AON_GPIO_PORT(AA, 0, 0, 8),
+	TEGRA264_AON_GPIO_PORT(BB, 0, 1, 2),
+	TEGRA264_AON_GPIO_PORT(CC, 0, 2, 8),
+	TEGRA264_AON_GPIO_PORT(DD, 0, 3, 8),
+	TEGRA264_AON_GPIO_PORT(EE, 0, 4, 4)
+};
+
+static const struct tegra_gpio_soc tegra264_aon_soc = {
+	.num_ports = ARRAY_SIZE(tegra264_aon_ports),
+	.ports = tegra264_aon_ports,
+	.name = "tegra264-gpio-aon",
+	.instance = 1,
+	.num_irqs_per_bank = 8,
+	.has_vm_support = true,
+};
+
+#define TEGRA264_UPHY_GPIO_PORT(_name, _bank, _port, _pins) \
+	TEGRA_GPIO_PORT(TEGRA264_UPHY, _name, _bank, _port, _pins)
+
+static const struct tegra_gpio_port tegra264_uphy_ports[] = {
+	TEGRA264_UPHY_GPIO_PORT(A, 0, 0, 6),
+	TEGRA264_UPHY_GPIO_PORT(B, 0, 1, 8),
+	TEGRA264_UPHY_GPIO_PORT(C, 0, 2, 3),
+	TEGRA264_UPHY_GPIO_PORT(D, 1, 0, 8),
+	TEGRA264_UPHY_GPIO_PORT(E, 1, 1, 4),
+};
+
+static const struct tegra_gpio_soc tegra264_uphy_soc = {
+	.num_ports = ARRAY_SIZE(tegra264_uphy_ports),
+	.ports = tegra264_uphy_ports,
+	.name = "tegra264-gpio-uphy",
+	.instance = 2,
+	.num_irqs_per_bank = 8,
+	.has_vm_support = true,
+};
+
 #define TEGRA256_MAIN_GPIO_PORT(_name, _bank, _port, _pins) \
 	TEGRA_GPIO_PORT(TEGRA256_MAIN, _name, _bank, _port, _pins)
 
@@ -1368,6 +1445,15 @@ static const struct of_device_id tegra186_gpio_of_match[] = {
 	}, {
 		.compatible = "nvidia,tegra256-gpio",
 		.data = &tegra256_main_soc
+	}, {
+		.compatible = "nvidia,tegra264-gpio",
+		.data = &tegra264_main_soc
+	}, {
+		.compatible = "nvidia,tegra264-gpio-aon",
+		.data = &tegra264_aon_soc
+	}, {
+		.compatible = "nvidia,tegra264-gpio-uphy",
+		.data = &tegra264_uphy_soc
 	}, {
 		/* sentinel */
 	}