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From: Faiz Abbas <faiz_abbas@ti.com>
To: Tony Lindgren <tony@atomide.com>
Cc: <linux-kernel@vger.kernel.org>, <linux-omap@vger.kernel.org>,
	<devicetree@vger.kernel.org>, <bcousson@baylibre.com>,
	<robh+dt@kernel.org>, <mark.rutland@arm.com>, <paul@pwsan.com>,
	<lokeshvutla@ti.com>, <linux@armlinux.org.uk>
Subject: Re: [PATCH 1/3] ARM: dra762: hwmod: Add MCAN support
Date: Thu, 17 May 2018 13:43:48 +0530	[thread overview]
Message-ID: <b3456763-2f82-9a0b-d166-ddf7965fc162@ti.com> (raw)
In-Reply-To: <20180515172324.GS98604@atomide.com>

Hi Tony,

On Tuesday 15 May 2018 10:53 PM, Tony Lindgren wrote:
> * Tony Lindgren <tony@atomide.com> [180515 17:20]:
>> * Tony Lindgren <tony@atomide.com> [180515 17:17]:
>>> * Faiz Abbas <faiz_abbas@ti.com> [180515 06:05]:
>>>> Hi Tony,
>>>>
>>>> On Tuesday 01 May 2018 08:56 PM, Tony Lindgren wrote:
>>>>> Hi,
>>>>>
>>>>> * Faiz Abbas <faiz_abbas@ti.com> [180408 09:59]:
>>>>>> From: Lokesh Vutla <lokeshvutla@ti.com>
>>>>>>
>>>>>> Add MCAN hwmod data and register it for dra762 silicons.
>>>>>>
>>>>>> Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
>>>>>> Signed-off-by: Faiz Abbas <faiz_abbas@ti.com>
>>>>>> ---
>>>>>>  arch/arm/mach-omap2/omap_hwmod_7xx_data.c | 32 +++++++++++++++++++++++++++++++
>>>>>>  1 file changed, 32 insertions(+)
>>>>>>
>>>>>> diff --git a/arch/arm/mach-omap2/omap_hwmod_7xx_data.c b/arch/arm/mach-omap2/omap_hwmod_7xx_data.c
>>>>>> index 62352d1..a2cd7f8 100644
>>>>>> --- a/arch/arm/mach-omap2/omap_hwmod_7xx_data.c
>>>>>> +++ b/arch/arm/mach-omap2/omap_hwmod_7xx_data.c
>>>>>> @@ -1356,6 +1356,29 @@ static struct omap_hwmod dra7xx_mailbox13_hwmod = {
>>>>>>  };
>>>>>>  
>>>>>>  /*
>>>>>> + * 'mcan' class
>>>>>> + *
>>>>>> + */
>>>>>> +static struct omap_hwmod_class dra76x_mcan_hwmod_class = {
>>>>>> +	.name	= "mcan",
>>>>>> +};
>>>>>
>>>>> Looks like you're missing the related struct omap_hwmod_class_sysconfig
>>>>> entry for this with the rev and sysconfig registers.
>>>>>
>>>>
>>>> Sorry, I missed this email earlier. The MCAN module doesn't have
>>>> sysconfig registers.
>>>
>>> If there's no sysconfig register you should have no need for adding
>>> anything to omap_hwmod_7xx_data.c. We now have the dts clkctrl
>>> clocks, you can just add that to the dts node for the device.
>>
>> However.. My guess is there is somewhere a top level interconnect
>> target module that uses DRA7XX_CM_WKUPAON_ADC_CLKCTRL. And that
>> module may have multiple child devices.
> 
> And I'm guessing the top level module with sysconfig related
> registers is named "adc" :)
> 

Yes. The MCAN clocks are controlled by the ADC_CLKCTRL register.
Please see TRM:
http://www.ti.com/general/docs/lit/getliterature.tsp?baseLiteratureNumber=spruie9&fileType=pdf
page: 1530

Thanks,
Faiz

  reply	other threads:[~2018-05-17  8:12 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-04-08  9:58 [PATCH 0/3] Add MCAN Support for dra76x Faiz Abbas
2018-04-08  9:59 ` [PATCH 1/3] ARM: dra762: hwmod: Add MCAN support Faiz Abbas
2018-05-01 15:26   ` Tony Lindgren
2018-05-15  6:04     ` Faiz Abbas
2018-05-15 17:14       ` Tony Lindgren
2018-05-15 17:18         ` Tony Lindgren
2018-05-15 17:23           ` Tony Lindgren
2018-05-17  8:13             ` Faiz Abbas [this message]
2018-05-17 21:04               ` Tony Lindgren
2018-05-17 21:09   ` Tony Lindgren
2018-05-18 11:54     ` Faiz Abbas
2018-04-08  9:59 ` [PATCH 2/3] ARM: dts: dra762: Add MCAN clock support Faiz Abbas
2018-05-15 17:16   ` Tony Lindgren
2018-04-08  9:59 ` [PATCH 3/3] ARM: dts: dra76x: Add MCAN node Faiz Abbas

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