[PATCH 2/5] watchdog: remove sirf atlas 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>
---
 drivers/watchdog/Kconfig      |  10 --
 drivers/watchdog/Makefile     |   1 -
 drivers/watchdog/atlas7_wdt.c | 221 ----------------------------------
 3 files changed, 232 deletions(-)
 delete mode 100644 drivers/watchdog/atlas7_wdt.c

diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig
index 88f4827849e4..5559e4325f6a 100644
--- a/drivers/watchdog/Kconfig
+++ b/drivers/watchdog/Kconfig
@@ -890,16 +890,6 @@ config LPC18XX_WATCHDOG
 	  To compile this driver as a module, choose M here: the
 	  module will be called lpc18xx_wdt.
 
-config ATLAS7_WATCHDOG
-	tristate "CSRatlas7 watchdog"
-	depends on ARCH_ATLAS7 || COMPILE_TEST
-	help
-	  Say Y here to include Watchdog timer support for the watchdog
-	  existing on the CSRatlas7 series platforms.
-
-	  To compile this driver as a module, choose M here: the
-	  module will be called atlas7_wdt.
-
 config RENESAS_WDT
 	tristate "Renesas WDT Watchdog"
 	depends on ARCH_RENESAS || COMPILE_TEST
diff --git a/drivers/watchdog/Makefile b/drivers/watchdog/Makefile
index 1741ed3c6ce6..40b94403c487 100644
--- a/drivers/watchdog/Makefile
+++ b/drivers/watchdog/Makefile
@@ -83,7 +83,6 @@ obj-$(CONFIG_MEDIATEK_WATCHDOG) += mtk_wdt.o
 obj-$(CONFIG_DIGICOLOR_WATCHDOG) += digicolor_wdt.o
 obj-$(CONFIG_LPC18XX_WATCHDOG) += lpc18xx_wdt.o
 obj-$(CONFIG_BCM7038_WDT) += bcm7038_wdt.o
-obj-$(CONFIG_ATLAS7_WATCHDOG) += atlas7_wdt.o
 obj-$(CONFIG_RENESAS_WDT) += renesas_wdt.o
 obj-$(CONFIG_RENESAS_RZAWDT) += rza_wdt.o
 obj-$(CONFIG_ASPEED_WATCHDOG) += aspeed_wdt.o
diff --git a/drivers/watchdog/atlas7_wdt.c b/drivers/watchdog/atlas7_wdt.c
deleted file mode 100644
index 9bfe650d802f..000000000000
--- a/drivers/watchdog/atlas7_wdt.c
+++ /dev/null
@@ -1,221 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Watchdog driver for CSR Atlas7
- *
- * Copyright (c) 2015 Cambridge Silicon Radio Limited, a CSR plc group company.
- */
-
-#include <linux/clk.h>
-#include <linux/io.h>
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <linux/of.h>
-#include <linux/platform_device.h>
-#include <linux/watchdog.h>
-
-#define ATLAS7_TIMER_WDT_INDEX		5
-#define ATLAS7_WDT_DEFAULT_TIMEOUT	20
-
-#define ATLAS7_WDT_CNT_CTRL	(0 + 4 * ATLAS7_TIMER_WDT_INDEX)
-#define ATLAS7_WDT_CNT_MATCH	(0x18 + 4 * ATLAS7_TIMER_WDT_INDEX)
-#define ATLAS7_WDT_CNT		(0x48 +  4 * ATLAS7_TIMER_WDT_INDEX)
-#define ATLAS7_WDT_CNT_EN	(BIT(0) | BIT(1))
-#define ATLAS7_WDT_EN		0x64
-
-static unsigned int timeout = ATLAS7_WDT_DEFAULT_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) ")");
-
-struct atlas7_wdog {
-	struct device *dev;
-	void __iomem *base;
-	unsigned long tick_rate;
-	struct clk *clk;
-};
-
-static unsigned int atlas7_wdt_gettimeleft(struct watchdog_device *wdd)
-{
-	struct atlas7_wdog *wdt = watchdog_get_drvdata(wdd);
-	u32 counter, match, delta;
-
-	counter = readl(wdt->base + ATLAS7_WDT_CNT);
-	match = readl(wdt->base + ATLAS7_WDT_CNT_MATCH);
-	delta = match - counter;
-
-	return  delta / wdt->tick_rate;
-}
-
-static int atlas7_wdt_ping(struct watchdog_device *wdd)
-{
-	struct atlas7_wdog *wdt = watchdog_get_drvdata(wdd);
-	u32 counter, match, delta;
-
-	counter = readl(wdt->base + ATLAS7_WDT_CNT);
-	delta = wdd->timeout * wdt->tick_rate;
-	match = counter + delta;
-
-	writel(match, wdt->base + ATLAS7_WDT_CNT_MATCH);
-
-	return 0;
-}
-
-static int atlas7_wdt_enable(struct watchdog_device *wdd)
-{
-	struct atlas7_wdog *wdt = watchdog_get_drvdata(wdd);
-
-	atlas7_wdt_ping(wdd);
-
-	writel(readl(wdt->base + ATLAS7_WDT_CNT_CTRL) | ATLAS7_WDT_CNT_EN,
-	      wdt->base + ATLAS7_WDT_CNT_CTRL);
-	writel(1, wdt->base + ATLAS7_WDT_EN);
-
-	return 0;
-}
-
-static int atlas7_wdt_disable(struct watchdog_device *wdd)
-{
-	struct atlas7_wdog *wdt = watchdog_get_drvdata(wdd);
-
-	writel(0, wdt->base + ATLAS7_WDT_EN);
-	writel(readl(wdt->base + ATLAS7_WDT_CNT_CTRL) & ~ATLAS7_WDT_CNT_EN,
-	      wdt->base + ATLAS7_WDT_CNT_CTRL);
-
-	return 0;
-}
-
-static int atlas7_wdt_settimeout(struct watchdog_device *wdd, unsigned int to)
-{
-	wdd->timeout = to;
-
-	return 0;
-}
-
-#define OPTIONS (WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING | WDIOF_MAGICCLOSE)
-
-static const struct watchdog_info atlas7_wdt_ident = {
-	.options = OPTIONS,
-	.firmware_version = 0,
-	.identity = "atlas7 Watchdog",
-};
-
-static const struct watchdog_ops atlas7_wdt_ops = {
-	.owner = THIS_MODULE,
-	.start = atlas7_wdt_enable,
-	.stop = atlas7_wdt_disable,
-	.get_timeleft = atlas7_wdt_gettimeleft,
-	.ping = atlas7_wdt_ping,
-	.set_timeout = atlas7_wdt_settimeout,
-};
-
-static struct watchdog_device atlas7_wdd = {
-	.info = &atlas7_wdt_ident,
-	.ops = &atlas7_wdt_ops,
-	.timeout = ATLAS7_WDT_DEFAULT_TIMEOUT,
-};
-
-static const struct of_device_id atlas7_wdt_ids[] = {
-	{ .compatible = "sirf,atlas7-tick"},
-	{}
-};
-
-static void atlas7_clk_disable_unprepare(void *data)
-{
-	clk_disable_unprepare(data);
-}
-
-static int atlas7_wdt_probe(struct platform_device *pdev)
-{
-	struct device *dev = &pdev->dev;
-	struct atlas7_wdog *wdt;
-	struct clk *clk;
-	int ret;
-
-	wdt = devm_kzalloc(dev, sizeof(*wdt), GFP_KERNEL);
-	if (!wdt)
-		return -ENOMEM;
-	wdt->base = devm_platform_ioremap_resource(pdev, 0);
-	if (IS_ERR(wdt->base))
-		return PTR_ERR(wdt->base);
-
-	clk = devm_clk_get(dev, NULL);
-	if (IS_ERR(clk))
-		return PTR_ERR(clk);
-	ret = clk_prepare_enable(clk);
-	if (ret) {
-		dev_err(dev, "clk enable failed\n");
-		return ret;
-	}
-	ret = devm_add_action_or_reset(dev, atlas7_clk_disable_unprepare, clk);
-	if (ret)
-		return ret;
-
-	/* disable watchdog hardware */
-	writel(0, wdt->base + ATLAS7_WDT_CNT_CTRL);
-
-	wdt->tick_rate = clk_get_rate(clk);
-	if (!wdt->tick_rate)
-		return -EINVAL;
-
-	wdt->clk = clk;
-	atlas7_wdd.min_timeout = 1;
-	atlas7_wdd.max_timeout = UINT_MAX / wdt->tick_rate;
-
-	watchdog_init_timeout(&atlas7_wdd, 0, dev);
-	watchdog_set_nowayout(&atlas7_wdd, nowayout);
-
-	watchdog_set_drvdata(&atlas7_wdd, wdt);
-	platform_set_drvdata(pdev, &atlas7_wdd);
-
-	watchdog_stop_on_reboot(&atlas7_wdd);
-	watchdog_stop_on_unregister(&atlas7_wdd);
-	return devm_watchdog_register_device(dev, &atlas7_wdd);
-}
-
-static int __maybe_unused atlas7_wdt_suspend(struct device *dev)
-{
-	/*
-	 * NOTE:timer controller registers settings are saved
-	 * and restored back by the timer-atlas7.c
-	 */
-	return 0;
-}
-
-static int __maybe_unused atlas7_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-atlas7.c, so we need not
-	 * update WD settings except refreshing timeout.
-	 */
-	atlas7_wdt_ping(wdd);
-
-	return 0;
-}
-
-static SIMPLE_DEV_PM_OPS(atlas7_wdt_pm_ops,
-		atlas7_wdt_suspend, atlas7_wdt_resume);
-
-MODULE_DEVICE_TABLE(of, atlas7_wdt_ids);
-
-static struct platform_driver atlas7_wdt_driver = {
-	.driver = {
-		.name = "atlas7-wdt",
-		.pm = &atlas7_wdt_pm_ops,
-		.of_match_table	= atlas7_wdt_ids,
-	},
-	.probe = atlas7_wdt_probe,
-};
-module_platform_driver(atlas7_wdt_driver);
-
-MODULE_DESCRIPTION("CSRatlas7 watchdog driver");
-MODULE_AUTHOR("Guo Zeng <Guo.Zeng@csr.com>");
-MODULE_LICENSE("GPL v2");
-MODULE_ALIAS("platform:atlas7-wdt");
-- 
2.29.2