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Message-Id: <20230410143101.182563-1-william.gray@linaro.org>
Date:   Mon, 10 Apr 2023 10:31:01 -0400
From:   William Breathitt Gray <william.gray@...aro.org>
To:     Wim Van Sebroeck <wim@...ux-watchdog.org>,
        Guenter Roeck <linux@...ck-us.net>
Cc:     linux-kernel@...r.kernel.org, linux-watchdog@...r.kernel.org,
        Paul Demetrotion <pdemetrotion@...systems.com>,
        techsupport@...systems.com,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Fred Eckert <Frede@...laser.com>,
        William Breathitt Gray <william.gray@...aro.org>
Subject: [PATCH] watchdog: ebc-c384_wdt: Remove support

The current maintainer no longer has access to the device for testing,
the original user of this driver indicates that they have moved on to
another device, and the manufacturer WINSYSTEMS does not appear
interested in taking over support for this code.

Signed-off-by: William Breathitt Gray <william.gray@...aro.org>
---
 MAINTAINERS                     |   6 --
 drivers/watchdog/Kconfig        |  10 ---
 drivers/watchdog/Makefile       |   1 -
 drivers/watchdog/ebc-c384_wdt.c | 142 --------------------------------
 4 files changed, 159 deletions(-)
 delete mode 100644 drivers/watchdog/ebc-c384_wdt.c

diff --git a/MAINTAINERS b/MAINTAINERS
index 90abe83c02f3..3b30b502de93 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -22511,12 +22511,6 @@ M:	David Härdeman <david@...deman.nu>
 S:	Maintained
 F:	drivers/media/rc/winbond-cir.c
 
-WINSYSTEMS EBC-C384 WATCHDOG DRIVER
-M:	William Breathitt Gray <william.gray@...aro.org>
-L:	linux-watchdog@...r.kernel.org
-S:	Maintained
-F:	drivers/watchdog/ebc-c384_wdt.c
-
 WINSYSTEMS WS16C48 GPIO DRIVER
 M:	William Breathitt Gray <william.gray@...aro.org>
 L:	linux-gpio@...r.kernel.org
diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig
index f0872970daf9..7c443d71b01f 100644
--- a/drivers/watchdog/Kconfig
+++ b/drivers/watchdog/Kconfig
@@ -1085,16 +1085,6 @@ config ALIM7101_WDT
 
 	  Most people will say N.
 
-config EBC_C384_WDT
-	tristate "WinSystems EBC-C384 Watchdog Timer"
-	depends on X86
-	select ISA_BUS_API
-	select WATCHDOG_CORE
-	help
-	  Enables watchdog timer support for the watchdog timer on the
-	  WinSystems EBC-C384 motherboard. The timeout may be configured via
-	  the timeout module parameter.
-
 config EXAR_WDT
 	tristate "Exar Watchdog Timer"
 	depends on X86
diff --git a/drivers/watchdog/Makefile b/drivers/watchdog/Makefile
index 9cbf6580f16c..3d12d4ddd5ea 100644
--- a/drivers/watchdog/Makefile
+++ b/drivers/watchdog/Makefile
@@ -105,7 +105,6 @@ obj-$(CONFIG_ADVANTECH_WDT) += advantechwdt.o
 obj-$(CONFIG_ADVANTECH_EC_WDT) += advantech_ec_wdt.o
 obj-$(CONFIG_ALIM1535_WDT) += alim1535_wdt.o
 obj-$(CONFIG_ALIM7101_WDT) += alim7101_wdt.o
-obj-$(CONFIG_EBC_C384_WDT) += ebc-c384_wdt.o
 obj-$(CONFIG_EXAR_WDT) += exar_wdt.o
 obj-$(CONFIG_F71808E_WDT) += f71808e_wdt.o
 obj-$(CONFIG_SP5100_TCO) += sp5100_tco.o
diff --git a/drivers/watchdog/ebc-c384_wdt.c b/drivers/watchdog/ebc-c384_wdt.c
deleted file mode 100644
index 8ef4b0df3855..000000000000
--- a/drivers/watchdog/ebc-c384_wdt.c
+++ /dev/null
@@ -1,142 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Watchdog timer driver for the WinSystems EBC-C384
- * Copyright (C) 2016 William Breathitt Gray
- */
-#include <linux/device.h>
-#include <linux/dmi.h>
-#include <linux/errno.h>
-#include <linux/io.h>
-#include <linux/ioport.h>
-#include <linux/isa.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <linux/types.h>
-#include <linux/watchdog.h>
-
-#define MODULE_NAME		"ebc-c384_wdt"
-#define WATCHDOG_TIMEOUT	60
-/*
- * The timeout value in minutes must fit in a single byte when sent to the
- * watchdog timer; the maximum timeout possible is 15300 (255 * 60) seconds.
- */
-#define WATCHDOG_MAX_TIMEOUT	15300
-#define BASE_ADDR		0x564
-#define ADDR_EXTENT		5
-#define CFG_ADDR		(BASE_ADDR + 1)
-#define PET_ADDR		(BASE_ADDR + 2)
-
-static bool nowayout = WATCHDOG_NOWAYOUT;
-module_param(nowayout, bool, 0);
-MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default="
-	__MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
-
-static unsigned timeout;
-module_param(timeout, uint, 0);
-MODULE_PARM_DESC(timeout, "Watchdog timeout in seconds (default="
-	__MODULE_STRING(WATCHDOG_TIMEOUT) ")");
-
-static int ebc_c384_wdt_start(struct watchdog_device *wdev)
-{
-	unsigned t = wdev->timeout;
-
-	/* resolution is in minutes for timeouts greater than 255 seconds */
-	if (t > 255)
-		t = DIV_ROUND_UP(t, 60);
-
-	outb(t, PET_ADDR);
-
-	return 0;
-}
-
-static int ebc_c384_wdt_stop(struct watchdog_device *wdev)
-{
-	outb(0x00, PET_ADDR);
-
-	return 0;
-}
-
-static int ebc_c384_wdt_set_timeout(struct watchdog_device *wdev, unsigned t)
-{
-	/* resolution is in minutes for timeouts greater than 255 seconds */
-	if (t > 255) {
-		/* round second resolution up to minute granularity */
-		wdev->timeout = roundup(t, 60);
-
-		/* set watchdog timer for minutes */
-		outb(0x00, CFG_ADDR);
-	} else {
-		wdev->timeout = t;
-
-		/* set watchdog timer for seconds */
-		outb(0x80, CFG_ADDR);
-	}
-
-	return 0;
-}
-
-static const struct watchdog_ops ebc_c384_wdt_ops = {
-	.start = ebc_c384_wdt_start,
-	.stop = ebc_c384_wdt_stop,
-	.set_timeout = ebc_c384_wdt_set_timeout
-};
-
-static const struct watchdog_info ebc_c384_wdt_info = {
-	.options = WDIOF_KEEPALIVEPING | WDIOF_MAGICCLOSE | WDIOF_SETTIMEOUT,
-	.identity = MODULE_NAME
-};
-
-static int ebc_c384_wdt_probe(struct device *dev, unsigned int id)
-{
-	struct watchdog_device *wdd;
-
-	if (!devm_request_region(dev, BASE_ADDR, ADDR_EXTENT, dev_name(dev))) {
-		dev_err(dev, "Unable to lock port addresses (0x%X-0x%X)\n",
-			BASE_ADDR, BASE_ADDR + ADDR_EXTENT);
-		return -EBUSY;
-	}
-
-	wdd = devm_kzalloc(dev, sizeof(*wdd), GFP_KERNEL);
-	if (!wdd)
-		return -ENOMEM;
-
-	wdd->info = &ebc_c384_wdt_info;
-	wdd->ops = &ebc_c384_wdt_ops;
-	wdd->timeout = WATCHDOG_TIMEOUT;
-	wdd->min_timeout = 1;
-	wdd->max_timeout = WATCHDOG_MAX_TIMEOUT;
-
-	watchdog_set_nowayout(wdd, nowayout);
-	watchdog_init_timeout(wdd, timeout, dev);
-
-	return devm_watchdog_register_device(dev, wdd);
-}
-
-static struct isa_driver ebc_c384_wdt_driver = {
-	.probe = ebc_c384_wdt_probe,
-	.driver = {
-		.name = MODULE_NAME
-	},
-};
-
-static int __init ebc_c384_wdt_init(void)
-{
-	if (!dmi_match(DMI_BOARD_NAME, "EBC-C384 SBC"))
-		return -ENODEV;
-
-	return isa_register_driver(&ebc_c384_wdt_driver, 1);
-}
-
-static void __exit ebc_c384_wdt_exit(void)
-{
-	isa_unregister_driver(&ebc_c384_wdt_driver);
-}
-
-module_init(ebc_c384_wdt_init);
-module_exit(ebc_c384_wdt_exit);
-
-MODULE_AUTHOR("William Breathitt Gray <vilhelm.gray@...il.com>");
-MODULE_DESCRIPTION("WinSystems EBC-C384 watchdog timer driver");
-MODULE_LICENSE("GPL v2");
-MODULE_ALIAS("isa:" MODULE_NAME);

base-commit: 09a9639e56c01c7a00d6c0ca63f4c7c41abe075d
-- 
2.39.2

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