gpio: remove dev-sync-probe

There are no more users. Remove the dev-sync-probe module.

Reviewed-by: Linus Walleij <linusw@kernel.org>
Link: https://patch.msgid.link/20260327-gpio-kill-dev-sync-probe-v1-4-efac254f1a1d@oss.qualcomm.com
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>

4 files changed, 0 insertions, 128 deletions

diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index 6dd2e08b9be6..536af328b56e 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -2108,6 +2108,3 @@ config GPIO_VIRTUSER
 endmenu
 
 endif
-
-config DEV_SYNC_PROBE
-	tristate
diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile
index 13ff2a129354..b267598b517d 100644
--- a/drivers/gpio/Makefile
+++ b/drivers/gpio/Makefile
@@ -21,9 +21,6 @@ obj-$(CONFIG_GPIO_GENERIC)	+= gpio-generic.o
 # directly supported by gpio-generic
 gpio-generic-$(CONFIG_GPIO_GENERIC)	+= gpio-mmio.o
 
-# Utilities for drivers that need synchronous fake device creation
-obj-$(CONFIG_DEV_SYNC_PROBE)		+= dev-sync-probe.o
-
 obj-$(CONFIG_GPIO_104_DIO_48E)		+= gpio-104-dio-48e.o
 obj-$(CONFIG_GPIO_104_IDI_48)		+= gpio-104-idi-48.o
 obj-$(CONFIG_GPIO_104_IDIO_16)		+= gpio-104-idio-16.o
diff --git a/drivers/gpio/dev-sync-probe.c b/drivers/gpio/dev-sync-probe.c
deleted file mode 100644
index 9ea733b863b2..000000000000
--- a/drivers/gpio/dev-sync-probe.c
+++ /dev/null
@@ -1,97 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * Common code for drivers creating fake platform devices.
- *
- * Provides synchronous device creation: waits for probe completion and
- * returns the probe success or error status to the device creator.
- *
- * Copyright (C) 2021 Bartosz Golaszewski <brgl@bgdev.pl>
- * Copyright (C) 2025 Koichiro Den <koichiro.den@canonical.com>
- */
-
-#include <linux/device.h>
-#include <linux/slab.h>
-
-#include "dev-sync-probe.h"
-
-static int dev_sync_probe_notifier_call(struct notifier_block *nb,
-					unsigned long action, void *data)
-{
-	struct dev_sync_probe_data *pdata;
-	struct device *dev = data;
-
-	pdata = container_of(nb, struct dev_sync_probe_data, bus_notifier);
-	if (!device_match_name(dev, pdata->name))
-		return NOTIFY_DONE;
-
-	switch (action) {
-	case BUS_NOTIFY_BOUND_DRIVER:
-		pdata->driver_bound = true;
-		break;
-	case BUS_NOTIFY_DRIVER_NOT_BOUND:
-		pdata->driver_bound = false;
-		break;
-	default:
-		return NOTIFY_DONE;
-	}
-
-	complete(&pdata->probe_completion);
-	return NOTIFY_OK;
-}
-
-void dev_sync_probe_init(struct dev_sync_probe_data *data)
-{
-	memset(data, 0, sizeof(*data));
-	init_completion(&data->probe_completion);
-	data->bus_notifier.notifier_call = dev_sync_probe_notifier_call;
-}
-EXPORT_SYMBOL_GPL(dev_sync_probe_init);
-
-int dev_sync_probe_register(struct dev_sync_probe_data *data,
-			    struct platform_device_info *pdevinfo)
-{
-	struct platform_device *pdev;
-	char *name;
-
-	name = kasprintf(GFP_KERNEL, "%s.%d", pdevinfo->name, pdevinfo->id);
-	if (!name)
-		return -ENOMEM;
-
-	data->driver_bound = false;
-	data->name = name;
-	reinit_completion(&data->probe_completion);
-	bus_register_notifier(&platform_bus_type, &data->bus_notifier);
-
-	pdev = platform_device_register_full(pdevinfo);
-	if (IS_ERR(pdev)) {
-		bus_unregister_notifier(&platform_bus_type, &data->bus_notifier);
-		kfree(data->name);
-		return PTR_ERR(pdev);
-	}
-
-	wait_for_completion(&data->probe_completion);
-	bus_unregister_notifier(&platform_bus_type, &data->bus_notifier);
-
-	if (!data->driver_bound) {
-		platform_device_unregister(pdev);
-		kfree(data->name);
-		return -ENXIO;
-	}
-
-	data->pdev = pdev;
-	return 0;
-}
-EXPORT_SYMBOL_GPL(dev_sync_probe_register);
-
-void dev_sync_probe_unregister(struct dev_sync_probe_data *data)
-{
-	platform_device_unregister(data->pdev);
-	kfree(data->name);
-	data->pdev = NULL;
-}
-EXPORT_SYMBOL_GPL(dev_sync_probe_unregister);
-
-MODULE_AUTHOR("Bartosz Golaszewski <brgl@bgdev.pl>");
-MODULE_AUTHOR("Koichiro Den <koichiro.den@canonical.com>");
-MODULE_DESCRIPTION("Utilities for synchronous fake device creation");
-MODULE_LICENSE("GPL");
diff --git a/drivers/gpio/dev-sync-probe.h b/drivers/gpio/dev-sync-probe.h
deleted file mode 100644
index 4b3d52b70519..000000000000
--- a/drivers/gpio/dev-sync-probe.h
+++ /dev/null
@@ -1,25 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-
-#ifndef DEV_SYNC_PROBE_H
-#define DEV_SYNC_PROBE_H
-
-#include <linux/completion.h>
-#include <linux/notifier.h>
-#include <linux/platform_device.h>
-
-struct dev_sync_probe_data {
-	struct platform_device *pdev;
-	const char *name;
-
-	/* Synchronize with probe */
-	struct notifier_block bus_notifier;
-	struct completion probe_completion;
-	bool driver_bound;
-};
-
-void dev_sync_probe_init(struct dev_sync_probe_data *data);
-int dev_sync_probe_register(struct dev_sync_probe_data *data,
-			    struct platform_device_info *pdevinfo);
-void dev_sync_probe_unregister(struct dev_sync_probe_data *data);
-
-#endif /* DEV_SYNC_PROBE_H */