linux-kernel - [PATCH] ARM: tegra: paz00: use software nodes to describe GPIOs for WiFi rfkill

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Message-ID: <ZnzulZBukibZUXKM@google.com>
Date: Wed, 26 Jun 2024 21:46:13 -0700
From: Dmitry Torokhov <dmitry.torokhov@...il.com>
To: Thierry Reding <thierry.reding@...il.com>
Cc: Russell King <linux@...linux.org.uk>,
	Jonathan Hunter <jonathanh@...dia.com>,
	linux-arm-kernel@...ts.infradead.org, linux-tegra@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] ARM: tegra: paz00: use software nodes to describe GPIOs for
 WiFi rfkill

Complete conversion of the WiFi rfkill device to use device
properties/software nodes by utilizing PROPERTY_ENTRY_GPIO() instead of
a lookup table.

Signed-off-by: Dmitry Torokhov <dmitry.torokhov@...il.com>
---

Compiled only, no real hardware to test.

 arch/arm/mach-tegra/board-paz00.c | 50 ++++++++++++++++++++-----------
 1 file changed, 32 insertions(+), 18 deletions(-)

diff --git a/arch/arm/mach-tegra/board-paz00.c b/arch/arm/mach-tegra/board-paz00.c
index 18d37f90cdfe..3ec810b6f1a7 100644
--- a/arch/arm/mach-tegra/board-paz00.c
+++ b/arch/arm/mach-tegra/board-paz00.c
@@ -8,35 +8,49 @@
  * Copyright (C) 2010 Google, Inc.
  */
 
-#include <linux/property.h>
+#include <linux/err.h>
 #include <linux/gpio/machine.h>
+#include <linux/gpio/property.h>
 #include <linux/platform_device.h>
+#include <linux/printk.h>
+#include <linux/property.h>
 
 #include "board.h"
 
-static struct property_entry wifi_rfkill_prop[] __initdata = {
-	PROPERTY_ENTRY_STRING("name", "wifi_rfkill"),
-	PROPERTY_ENTRY_STRING("type", "wlan"),
-	{ },
+static const struct software_node tegra_gpiochip_node = {
+	.name	= "tegra-gpio",
 };
 
-static struct platform_device wifi_rfkill_device = {
-	.name	= "rfkill_gpio",
-	.id	= -1,
+static const struct property_entry wifi_rfkill_prop[] __initconst = {
+	PROPERTY_ENTRY_STRING("name", "wifi_rfkill"),
+	PROPERTY_ENTRY_STRING("type", "wlan"),
+	PROPERTY_ENTRY_GPIO("reset-gpios",
+			    &tegra_gpiochip_node, 25, GPIO_ACTIVE_HIGH),
+	PROPERTY_ENTRY_GPIO("shutdown-gpios",
+			    &tegra_gpiochip_node, 85, GPIO_ACTIVE_HIGH),
+	{ }
 };
 
-static struct gpiod_lookup_table wifi_gpio_lookup = {
-	.dev_id = "rfkill_gpio",
-	.table = {
-		GPIO_LOOKUP("tegra-gpio", 25, "reset", 0),
-		GPIO_LOOKUP("tegra-gpio", 85, "shutdown", 0),
-		{ },
-	},
+static const struct platform_device_info wifi_rfkill_info __initconst = {
+	.name		= "rfkill_gpio",
+	.id		= PLATFORM_DEVID_NONE,
+	.properties	= wifi_rfkill_prop,
 };
 
 void __init tegra_paz00_wifikill_init(void)
 {
-	device_create_managed_software_node(&wifi_rfkill_device.dev, wifi_rfkill_prop, NULL);
-	gpiod_add_lookup_table(&wifi_gpio_lookup);
-	platform_device_register(&wifi_rfkill_device);
+	struct platform_device *pd;
+	int err;
+
+	err = software_node_register(&tegra_gpiochip_node);
+	if (err) {
+		pr_err("failed to register %s node: %d\n",
+		       tegra_gpiochip_node.name, err);
+		return;
+	}
+
+	pd = platform_device_register_full(&wifi_rfkill_info);
+	err = PTR_ERR_OR_ZERO(pd);
+	if (err)
+		pr_err("failed to register WiFi rfkill device: %d\n", err);
 }
-- 
2.45.2.741.gdbec12cfda-goog


-- 
Dmitry