linux-kernel - Re: [PATCH i2c-next v6] i2c: aspeed: Handle master/slave combined irq events properly

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Date:   Fri, 14 Sep 2018 09:52:35 -0700
From:   Jae Hyun Yoo <jae.hyun.yoo@...ux.intel.com>
To:     Guenter Roeck <linux@...ck-us.net>,
        Cédric Le Goater <clg@...d.org>
Cc:     linux-aspeed@...ts.ozlabs.org,
        James Feist <james.feist@...ux.intel.com>,
        Vernon Mauery <vernon.mauery@...ux.intel.com>,
        OpenBMC Maillist <openbmc@...ts.ozlabs.org>,
        Brendan Higgins <brendanhiggins@...gle.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        jarkko.nikula@...ux.intel.com,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        linux-i2c@...r.kernel.org
Subject: Re: [PATCH i2c-next v6] i2c: aspeed: Handle master/slave combined irq
 events properly

On 9/14/2018 6:23 AM, Guenter Roeck wrote:
> On 09/13/2018 10:38 PM, Cédric Le Goater wrote:
>>>>> That seems to suggest that none of the status bits auto-clears, and 
>>>>> that
>>>>> the above code clearing intr_status should be removed entirely.
>>>>> Am I missing something ?
>>>>
>>>> You are right. I just pushed another version of the previous patch 
>>>> with this
>>>> new hunk :
>>>>
>>>> @@ -188,7 +200,6 @@ static void aspeed_i2c_bus_handle_cmd(As
>>>>    {
>>>>        bus->cmd &= ~0xFFFF;
>>>>        bus->cmd |= value & 0xFFFF;
>>>> -    bus->intr_status = 0;
>>>>          if (bus->cmd & I2CD_M_START_CMD) {
>>>>            uint8_t state = aspeed_i2c_get_state(bus) & I2CD_MACTIVE ?
>>>>
>>>>
>>>> The QEMU palmetto and witherspoon machines seem to behave fine. Can 
>>>> you give
>>>> it a try ?
>>>>
>>>
>>> Works fine for me for all affected qemu platforms.
>>>
>>> How do you want to proceed with the qemu patches ? I attached my patches
>>> for reference. Maybe you can add them to your tree if they are ok and 
>>> submit
>>> the entire series together to the qemu mailing list ?
>>
>> yes. They are pushed in my aspeed-3.1 branch. I will send the series
>> on the list.
>>
> 
> Excellent. Thanks a lot!
> 
> Guenter
> 

Awesome! Many thanks to Guenter, Cédric and Joel. I really appreciate
it.

Jae