linux-kernel - Re: [PATCH] hwspinlock: stm32: implement the relax() ops

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Message-ID: <b05fff00-2dd7-75d7-e8fe-de004b0f20da@st.com>
Date:   Mon, 13 May 2019 09:07:28 +0000
From:   Fabien DESSENNE <fabien.dessenne@...com>
To:     Benjamin Gaignard <benjamin.gaignard@...aro.org>
CC:     Ohad Ben-Cohen <ohad@...ery.com>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Alexandre TORGUE <alexandre.torgue@...com>,
        "linux-remoteproc@...r.kernel.org" <linux-remoteproc@...r.kernel.org>,
        "linux-stm32@...md-mailman.stormreply.com" 
        <linux-stm32@...md-mailman.stormreply.com>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Benjamin GAIGNARD <benjamin.gaignard@...com>,
        Fabien DESSENNE <fabien.dessenne@...com>
Subject: Re: [PATCH] hwspinlock: stm32: implement the relax() ops

Hi

Any further comments?

Fabien

On 08/03/2019 1:42 PM, Benjamin Gaignard wrote:
> Le jeu. 7 mars 2019 à 16:42, Fabien Dessenne <fabien.dessenne@...com> a écrit :
>> Implement this optional ops, called by hwspinlock core while spinning on
>> a lock, between two successive invocations of trylock().
>>
>> Signed-off-by: Fabien Dessenne <fabien.dessenne@...com>
> Reviewed-by: Benjamin Gaignard <benjamin.gaignard@...com>
>
>> ---
>>   drivers/hwspinlock/stm32_hwspinlock.c | 7 +++++++
>>   1 file changed, 7 insertions(+)
>>
>> diff --git a/drivers/hwspinlock/stm32_hwspinlock.c b/drivers/hwspinlock/stm32_hwspinlock.c
>> index 4418392..c8eacf4 100644
>> --- a/drivers/hwspinlock/stm32_hwspinlock.c
>> +++ b/drivers/hwspinlock/stm32_hwspinlock.c
>> @@ -5,6 +5,7 @@
>>    */
>>
>>   #include <linux/clk.h>
>> +#include <linux/delay.h>
>>   #include <linux/hwspinlock.h>
>>   #include <linux/io.h>
>>   #include <linux/kernel.h>
>> @@ -42,9 +43,15 @@ static void stm32_hwspinlock_unlock(struct hwspinlock *lock)
>>          writel(STM32_MUTEX_COREID, lock_addr);
>>   }
>>
>> +static void stm32_hwspinlock_relax(struct hwspinlock *lock)
>> +{
>> +       ndelay(50);
>> +}
>> +
>>   static const struct hwspinlock_ops stm32_hwspinlock_ops = {
>>          .trylock        = stm32_hwspinlock_trylock,
>>          .unlock         = stm32_hwspinlock_unlock,
>> +       .relax          = stm32_hwspinlock_relax,
>>   };
>>
>>   static int stm32_hwspinlock_probe(struct platform_device *pdev)
>> --
>> 2.7.4
>>
>>
>> _______________________________________________
>> linux-arm-kernel mailing list
>> linux-arm-kernel@...ts.infradead.org
>> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
>
>

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