From: "Wang, Peng 1. (NSB - CN/Hangzhou)" <peng.1.wang@nokia-sbell.com>
To: Guenter Roeck <linux@roeck-us.net>
Cc: Guenter Roeck <groeck7@gmail.com>,
"wim@linux-watchdog.org" <wim@linux-watchdog.org>,
"linux-watchdog@vger.kernel.org" <linux-watchdog@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: RE: [PATCH v2] watchdog: make DesignWare watchdog allow users to set bigger timeout value
Date: Fri, 22 Nov 2019 01:16:34 +0000 [thread overview]
Message-ID: <a66f73ba253b41f8956eb85e3cc67a4a@nokia-sbell.com> (raw)
In-Reply-To: <20191121141508.GA13249@roeck-us.net>
> Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Roeck, thanks for your time to guide me to finish the review. Do I need to re-send a mail with your sign?
Peng Wang
-----Original Message-----
From: Guenter Roeck [mailto:groeck7@gmail.com] On Behalf Of Guenter Roeck
Sent: Thursday, November 21, 2019 10:15 PM
To: Wang, Peng 1. (NSB - CN/Hangzhou) <peng.1.wang@nokia-sbell.com>
Cc: Guenter Roeck <groeck7@gmail.com>; wim@linux-watchdog.org; linux-watchdog@vger.kernel.org; linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2] watchdog: make DesignWare watchdog allow users to set bigger timeout value
On Thu, Nov 21, 2019 at 10:35:12AM +0000, Wang, Peng 1. (NSB - CN/Hangzhou) wrote:
> From aabaa4b709bd451e566c906e8d1dca48f92f9b12 Mon Sep 17 00:00:00 2001
> From: Peng Wang <peng.1.wang@nokia-sbell.com>
> Date: Wed, 20 Nov 2019 15:12:59 +0800
> Subject: [PATCH] watchdog: make DesignWare watchdog allow users to set
> bigger timeout value
>
> watchdog_dev.c provides means to allow users to set bigger timeout
> value than HW can support, make DesignWare watchdog align with this.
>
> ---
>
> v2 -> v1:
> - use top_s to compare with wdd->max_hw_heartbeat_ms
> - update wdd->timeout in case it's greater than HW supports
> - fix comments error
>
> v1: initial version
>
> Signed-off-by: Peng Wang <peng.1.wang@nokia-sbell.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
> ---
> drivers/watchdog/dw_wdt.c | 10 +++++++++-
> 1 file changed, 9 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/watchdog/dw_wdt.c b/drivers/watchdog/dw_wdt.c
> index fef7c61..12c116e 100644
> --- a/drivers/watchdog/dw_wdt.c
> +++ b/drivers/watchdog/dw_wdt.c
> @@ -114,7 +114,15 @@ static int dw_wdt_set_timeout(struct watchdog_device *wdd, unsigned int top_s)
> writel(top_val | top_val << WDOG_TIMEOUT_RANGE_TOPINIT_SHIFT,
> dw_wdt->regs + WDOG_TIMEOUT_RANGE_REG_OFFSET);
>
> - wdd->timeout = dw_wdt_top_in_seconds(dw_wdt, top_val);
> + /*
> + * In case users set bigger timeout value than HW can support,
> + * kernel(watchdog_dev.c) helps to feed watchdog before
> + * wdd->max_hw_heartbeat_ms
> + */
> + if ( top_s * 1000 <= wdd->max_hw_heartbeat_ms )
> + wdd->timeout = dw_wdt_top_in_seconds(dw_wdt, top_val);
> + else
> + wdd->timeout = top_s;
>
> return 0;
> }
> --
> 1.8.3.1
>
next prev parent reply other threads:[~2019-11-22 1:16 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-21 10:35 [PATCH v2] watchdog: make DesignWare watchdog allow users to set bigger timeout value Wang, Peng 1. (NSB - CN/Hangzhou)
2019-11-21 14:15 ` Guenter Roeck
2019-11-22 1:16 ` Wang, Peng 1. (NSB - CN/Hangzhou) [this message]
2019-11-22 2:41 ` Guenter Roeck
2019-11-22 3:20 ` Wang, Peng 1. (NSB - CN/Hangzhou)
2019-11-22 5:38 ` Guenter Roeck
2019-11-25 1:37 ` Wang, Peng 1. (NSB - CN/Hangzhou)
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