[4/4] watchdog: st_wdt: Add new driver for ST's LPC Watchdog
David Paris
david.paris at st.com
Tue Jan 13 06:32:13 PST 2015
Hi Guenter,
Please forget this implementation of ST LPC Watchdog, Lee has
provided a new patchset. Search for "[STLinux Kernel] [PATCH 0/8] mfd:
watchdog: rtc: New driver for ST's LPC IP"
David
On 01/13/2015 03:23 PM, Guenter Roeck wrote:
> On Thu, Oct 23, 2014 at 04:18:44PM +0100, Lee Jones wrote:
>> Signed-off-by: David Paris <david.paris at st.com>
>> Signed-off-by: Lee Jones <lee.jones at linaro.org>
> Digging myself out of my hole. Sorry for the laaaate reply.
>
>> ---
>> drivers/watchdog/Kconfig | 16 +++
>> drivers/watchdog/Makefile | 1 +
>> drivers/watchdog/st_wdt.c | 317 ++++++++++++++++++++++++++++++++++++++++++++++
>> 3 files changed, 334 insertions(+)
>> create mode 100644 drivers/watchdog/st_wdt.c
>>
>> diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig
>> index f57312f..c8abf57 100644
>> --- a/drivers/watchdog/Kconfig
>> +++ b/drivers/watchdog/Kconfig
>> @@ -432,6 +432,22 @@ config SIRFSOC_WATCHDOG
>> Support for CSR SiRFprimaII and SiRFatlasVI watchdog. When
>> the watchdog triggers the system will be reset.
>>
>> +config ST_WATCHDOG
>> + tristate "STMicroelectronics LPC Watchdog"
>> + depends on ARCH_STI && OF
>> + depends on !RTC_DRV_ST_LPC
> RTC_DRV_ST_LPC is not in mainline nor in -next. Is this still current ?
>
>> + select WATCHDOG_CORE
>> + help
>> + Say Y here to include Watchdog timer support for the watchdog
>> + existing in the LPC of STMicroelectronics SOCs.
>> + !!! BE CARREFUL !!!
>> + This driver shares hardware resources with RTC Alarm part of the
>> + LPC. Both LPC Watchdog driver and LPC RTC driver cannot be
>> + used together.
>> +
> Arnd has asked if/how this is enforced by the code. Was this ever resolved ?
>
>> + To compile this driver as a module, choose M here: the
>> + module will be called st-wdt.
>> +
> [ ... ]
>
>> + watchdog_set_drvdata(&st_wdog_dev, st_wdog);
>> + watchdog_set_nowayout(&st_wdog_dev, WATCHDOG_NOWAYOUT);
>> +
>> + /* Init Watchdog timeout with value in DT */
>> + ret = watchdog_init_timeout(&st_wdog_dev, 0, &pdev->dev);
>> + if (ret) {
>> + dev_err(&pdev->dev, "Unable to initialise watchdog timeout\n");
> Missing clk_disable_unprepare().
>
>> + return ret;
>> + }
>> +
>> + ret = watchdog_register_device(&st_wdog_dev);
>> + if (ret) {
>> + dev_err(&pdev->dev, "Unable to register watchdog\n");
>> + clk_disable_unprepare(clk);
>> + return ret;
>> + }
>> +
>> + st_wdog_setup(st_wdog, true);
>> +
>> + dev_info(&pdev->dev, "LPC Watchdog driver registered, reset type is %s",
>> + st_wdog->warm_reset ? "warm" : "cold");
> Missing newline.
>
> Guenter
>
>
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