[PATCH 1/5] watchdog: remove sirf prima driver

[Arnd Bergmann <arnd@kernel.org>]

From: Arnd Bergmann <arnd@arndb.de>

The CSR SiRF prima2/atlas platforms are getting removed, so this driver
is no longer needed.

Cc: Barry Song <baohua@kernel.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 .../bindings/watchdog/sirfsoc_wdt.txt         |  18 --
 drivers/watchdog/Kconfig                      |  10 -
 drivers/watchdog/Makefile                     |   1 -
 drivers/watchdog/sirfsoc_wdt.c                | 216 ------------------
 4 files changed, 245 deletions(-)
 delete mode 100644 Documentation/devicetree/bindings/watchdog/sirfsoc_wdt.txt
 delete mode 100644 drivers/watchdog/sirfsoc_wdt.c

diff --git a/Documentation/devicetree/bindings/watchdog/sirfsoc_wdt.txt b/Documentation/devicetree/bindings/watchdog/sirfsoc_wdt.txt
deleted file mode 100644
index 0dce5e3100b4..000000000000
--- a/Documentation/devicetree/bindings/watchdog/sirfsoc_wdt.txt
+++ /dev/null
@@ -1,18 +0,0 @@
-SiRFSoC Timer and Watchdog Timer(WDT) Controller
-
-Required properties:
-- compatible: "sirf,prima2-tick"
-- reg: Address range of tick timer/WDT register set
-- interrupts: interrupt number to the cpu
-
-Optional properties:
-- timeout-sec : Contains the watchdog timeout in seconds
-
-Example:
-
-timer@b0020000 {
-	compatible = "sirf,prima2-tick";
-	reg = <0xb0020000 0x1000>;
-	interrupts = <0>;
-	timeout-sec = <30>;
-};
diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig
index 7ff941e71b79..88f4827849e4 100644
--- a/drivers/watchdog/Kconfig
+++ b/drivers/watchdog/Kconfig
@@ -788,16 +788,6 @@ config MOXART_WDT
 	  To compile this driver as a module, choose M here: the
 	  module will be called moxart_wdt.
 
-config SIRFSOC_WATCHDOG
-	tristate "SiRFSOC watchdog"
-	depends on HAS_IOMEM
-	depends on ARCH_SIRF || COMPILE_TEST
-	select WATCHDOG_CORE
-	default y
-	help
-	  Support for CSR SiRFprimaII and SiRFatlasVI watchdog. When
-	  the watchdog triggers the system will be reset.
-
 config ST_LPC_WATCHDOG
 	tristate "STMicroelectronics LPC Watchdog"
 	depends on ARCH_STI || COMPILE_TEST
diff --git a/drivers/watchdog/Makefile b/drivers/watchdog/Makefile
index 5c74ee19d441..1741ed3c6ce6 100644
--- a/drivers/watchdog/Makefile
+++ b/drivers/watchdog/Makefile
@@ -73,7 +73,6 @@ obj-$(CONFIG_UX500_WATCHDOG) += ux500_wdt.o
 obj-$(CONFIG_RETU_WATCHDOG) += retu_wdt.o
 obj-$(CONFIG_BCM2835_WDT) += bcm2835_wdt.o
 obj-$(CONFIG_MOXART_WDT) += moxart_wdt.o
-obj-$(CONFIG_SIRFSOC_WATCHDOG) += sirfsoc_wdt.o
 obj-$(CONFIG_ST_LPC_WATCHDOG) += st_lpc_wdt.o
 obj-$(CONFIG_QCOM_WDT) += qcom-wdt.o
 obj-$(CONFIG_BCM_KONA_WDT) += bcm_kona_wdt.o
diff --git a/drivers/watchdog/sirfsoc_wdt.c b/drivers/watchdog/sirfsoc_wdt.c
deleted file mode 100644
index 734cf2966ecb..000000000000
--- a/drivers/watchdog/sirfsoc_wdt.c
+++ /dev/null
@@ -1,216 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * Watchdog driver for CSR SiRFprimaII and SiRFatlasVI
- *
- * Copyright (c) 2013 Cambridge Silicon Radio Limited, a CSR plc group company.
- */
-
-#include <linux/module.h>
-#include <linux/watchdog.h>
-#include <linux/platform_device.h>
-#include <linux/moduleparam.h>
-#include <linux/of.h>
-#include <linux/io.h>
-#include <linux/uaccess.h>
-
-#define CLOCK_FREQ	1000000
-
-#define SIRFSOC_TIMER_COUNTER_LO	0x0000
-#define SIRFSOC_TIMER_MATCH_0		0x0008
-#define SIRFSOC_TIMER_INT_EN		0x0024
-#define SIRFSOC_TIMER_WATCHDOG_EN	0x0028
-#define SIRFSOC_TIMER_LATCH		0x0030
-#define SIRFSOC_TIMER_LATCHED_LO	0x0034
-
-#define SIRFSOC_TIMER_WDT_INDEX		5
-
-#define SIRFSOC_WDT_MIN_TIMEOUT		30		/* 30 secs */
-#define SIRFSOC_WDT_MAX_TIMEOUT		(10 * 60)	/* 10 mins */
-#define SIRFSOC_WDT_DEFAULT_TIMEOUT	30		/* 30 secs */
-
-static unsigned int timeout;
-static bool nowayout = WATCHDOG_NOWAYOUT;
-
-module_param(timeout, uint, 0);
-module_param(nowayout, bool, 0);
-
-MODULE_PARM_DESC(timeout, "Default watchdog timeout (in seconds)");
-MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default="
-			__MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
-
-static void __iomem *sirfsoc_wdt_base(struct watchdog_device *wdd)
-{
-	return (void __iomem __force *)watchdog_get_drvdata(wdd);
-}
-
-static unsigned int sirfsoc_wdt_gettimeleft(struct watchdog_device *wdd)
-{
-	u32 counter, match;
-	void __iomem *wdt_base;
-	int time_left;
-
-	wdt_base = sirfsoc_wdt_base(wdd);
-	counter = readl(wdt_base + SIRFSOC_TIMER_COUNTER_LO);
-	match = readl(wdt_base +
-		SIRFSOC_TIMER_MATCH_0 + (SIRFSOC_TIMER_WDT_INDEX << 2));
-
-	time_left = match - counter;
-
-	return time_left / CLOCK_FREQ;
-}
-
-static int sirfsoc_wdt_updatetimeout(struct watchdog_device *wdd)
-{
-	u32 counter, timeout_ticks;
-	void __iomem *wdt_base;
-
-	timeout_ticks = wdd->timeout * CLOCK_FREQ;
-	wdt_base = sirfsoc_wdt_base(wdd);
-
-	/* Enable the latch before reading the LATCH_LO register */
-	writel(1, wdt_base + SIRFSOC_TIMER_LATCH);
-
-	/* Set the TO value */
-	counter = readl(wdt_base + SIRFSOC_TIMER_LATCHED_LO);
-
-	counter += timeout_ticks;
-
-	writel(counter, wdt_base +
-		SIRFSOC_TIMER_MATCH_0 + (SIRFSOC_TIMER_WDT_INDEX << 2));
-
-	return 0;
-}
-
-static int sirfsoc_wdt_enable(struct watchdog_device *wdd)
-{
-	void __iomem *wdt_base = sirfsoc_wdt_base(wdd);
-	sirfsoc_wdt_updatetimeout(wdd);
-
-	/*
-	 * NOTE: If interrupt is not enabled
-	 * then WD-Reset doesn't get generated at all.
-	 */
-	writel(readl(wdt_base + SIRFSOC_TIMER_INT_EN)
-		| (1 << SIRFSOC_TIMER_WDT_INDEX),
-		wdt_base + SIRFSOC_TIMER_INT_EN);
-	writel(1, wdt_base + SIRFSOC_TIMER_WATCHDOG_EN);
-
-	return 0;
-}
-
-static int sirfsoc_wdt_disable(struct watchdog_device *wdd)
-{
-	void __iomem *wdt_base = sirfsoc_wdt_base(wdd);
-
-	writel(0, wdt_base + SIRFSOC_TIMER_WATCHDOG_EN);
-	writel(readl(wdt_base + SIRFSOC_TIMER_INT_EN)
-		& (~(1 << SIRFSOC_TIMER_WDT_INDEX)),
-		wdt_base + SIRFSOC_TIMER_INT_EN);
-
-	return 0;
-}
-
-static int sirfsoc_wdt_settimeout(struct watchdog_device *wdd, unsigned int to)
-{
-	wdd->timeout = to;
-	sirfsoc_wdt_updatetimeout(wdd);
-
-	return 0;
-}
-
-#define OPTIONS (WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING | WDIOF_MAGICCLOSE)
-
-static const struct watchdog_info sirfsoc_wdt_ident = {
-	.options          =     OPTIONS,
-	.firmware_version =	0,
-	.identity         =	"SiRFSOC Watchdog",
-};
-
-static const struct watchdog_ops sirfsoc_wdt_ops = {
-	.owner = THIS_MODULE,
-	.start = sirfsoc_wdt_enable,
-	.stop = sirfsoc_wdt_disable,
-	.get_timeleft = sirfsoc_wdt_gettimeleft,
-	.ping = sirfsoc_wdt_updatetimeout,
-	.set_timeout = sirfsoc_wdt_settimeout,
-};
-
-static struct watchdog_device sirfsoc_wdd = {
-	.info = &sirfsoc_wdt_ident,
-	.ops = &sirfsoc_wdt_ops,
-	.timeout = SIRFSOC_WDT_DEFAULT_TIMEOUT,
-	.min_timeout = SIRFSOC_WDT_MIN_TIMEOUT,
-	.max_timeout = SIRFSOC_WDT_MAX_TIMEOUT,
-};
-
-static int sirfsoc_wdt_probe(struct platform_device *pdev)
-{
-	struct device *dev = &pdev->dev;
-	int ret;
-	void __iomem *base;
-
-	base = devm_platform_ioremap_resource(pdev, 0);
-	if (IS_ERR(base))
-		return PTR_ERR(base);
-
-	watchdog_set_drvdata(&sirfsoc_wdd, (__force void *)base);
-
-	watchdog_init_timeout(&sirfsoc_wdd, timeout, dev);
-	watchdog_set_nowayout(&sirfsoc_wdd, nowayout);
-	sirfsoc_wdd.parent = dev;
-
-	watchdog_stop_on_reboot(&sirfsoc_wdd);
-	watchdog_stop_on_unregister(&sirfsoc_wdd);
-	ret = devm_watchdog_register_device(dev, &sirfsoc_wdd);
-	if (ret)
-		return ret;
-
-	platform_set_drvdata(pdev, &sirfsoc_wdd);
-
-	return 0;
-}
-
-#ifdef	CONFIG_PM_SLEEP
-static int sirfsoc_wdt_suspend(struct device *dev)
-{
-	return 0;
-}
-
-static int sirfsoc_wdt_resume(struct device *dev)
-{
-	struct watchdog_device *wdd = dev_get_drvdata(dev);
-
-	/*
-	 * NOTE: Since timer controller registers settings are saved
-	 * and restored back by the timer-prima2.c, so we need not
-	 * update WD settings except refreshing timeout.
-	 */
-	sirfsoc_wdt_updatetimeout(wdd);
-
-	return 0;
-}
-#endif
-
-static SIMPLE_DEV_PM_OPS(sirfsoc_wdt_pm_ops,
-		sirfsoc_wdt_suspend, sirfsoc_wdt_resume);
-
-static const struct of_device_id sirfsoc_wdt_of_match[] = {
-	{ .compatible = "sirf,prima2-tick"},
-	{},
-};
-MODULE_DEVICE_TABLE(of, sirfsoc_wdt_of_match);
-
-static struct platform_driver sirfsoc_wdt_driver = {
-	.driver = {
-		.name = "sirfsoc-wdt",
-		.pm = &sirfsoc_wdt_pm_ops,
-		.of_match_table	= sirfsoc_wdt_of_match,
-	},
-	.probe = sirfsoc_wdt_probe,
-};
-module_platform_driver(sirfsoc_wdt_driver);
-
-MODULE_DESCRIPTION("SiRF SoC watchdog driver");
-MODULE_AUTHOR("Xianglong Du <Xianglong.Du@csr.com>");
-MODULE_LICENSE("GPL v2");
-MODULE_ALIAS("platform:sirfsoc-wdt");
-- 
2.29.2