From: Guenter Roeck <linux@roeck-us.net>
To: Arnd Bergmann <arnd@kernel.org>
Cc: linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, linux-watchdog@vger.kernel.org,
Wim Van Sebroeck <wim@linux-watchdog.org>,
Arnd Bergmann <arnd@arndb.de>, Barry Song <baohua@kernel.org>
Subject: Re: [PATCH 2/5] watchdog: remove sirf atlas driver
Date: Wed, 20 Jan 2021 11:03:29 -0800 [thread overview]
Message-ID: <20210120190329.GB162747@roeck-us.net> (raw)
In-Reply-To: <20210120162745.61268-3-arnd@kernel.org>
On Wed, Jan 20, 2021 at 05:27:42PM +0100, Arnd Bergmann wrote:
> 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>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
> ---
> 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
>
next prev parent reply other threads:[~2021-01-20 19:08 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-20 16:27 [PATCH 0/5] watchdog: remove obsolete drivers Arnd Bergmann
2021-01-20 16:27 ` [PATCH 1/5] watchdog: remove sirf prima driver Arnd Bergmann
2021-01-20 19:03 ` Guenter Roeck
2021-01-20 21:15 ` Barry Song
2021-01-20 16:27 ` [PATCH 2/5] watchdog: remove sirf atlas driver Arnd Bergmann
2021-01-20 19:03 ` Guenter Roeck [this message]
2021-01-20 21:17 ` Barry Song
2021-01-20 16:27 ` [PATCH 3/5] watchdog: remove zte zx driver Arnd Bergmann
2021-01-20 19:03 ` Guenter Roeck
2021-01-20 16:27 ` [PATCH 4/5] watchdog: remove tango driver Arnd Bergmann
2021-01-20 19:03 ` Guenter Roeck
2021-01-21 14:01 ` Måns Rullgård
2021-01-21 15:18 ` Arnd Bergmann
2021-01-21 16:33 ` Guenter Roeck
2021-01-23 18:34 ` Guenter Roeck
2021-01-23 18:47 ` Arnd Bergmann
2021-01-20 16:27 ` [PATCH 5/5] watchdog: remove coh901 driver Arnd Bergmann
2021-01-20 19:03 ` Guenter Roeck
2021-01-21 13:14 ` Linus Walleij
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20210120190329.GB162747@roeck-us.net \
--to=linux@roeck-us.net \
--cc=arnd@arndb.de \
--cc=arnd@kernel.org \
--cc=baohua@kernel.org \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-watchdog@vger.kernel.org \
--cc=wim@linux-watchdog.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).