linux-kernel - Re: [PATCH 1/3] net: mdio-octeon: Modify driver to work on both ThunderX and Octeon

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Date:	Tue, 28 Jul 2015 14:48:13 -0700
From:	Radha Mohan <mohun106@...il.com>
To:	David Daney <ddaney@...iumnetworks.com>
Cc:	f.fainelli@...il.com, netdev@...r.kernel.org,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	linux-kernel@...r.kernel.org,
	Radha Mohan Chintakuntla <rchintakuntla@...ium.com>,
	Sunil Goutham <sgoutham@...ium.com>,
	David Daney <david.daney@...ium.com>
Subject: Re: [PATCH 1/3] net: mdio-octeon: Modify driver to work on both
 ThunderX and Octeon

On Tue, Jul 28, 2015 at 7:07 AM, David Daney <ddaney@...iumnetworks.com> wrote:
> On 07/27/2015 07:14 PM, mohun106@...il.com wrote:
>>
>> From: Radha Mohan Chintakuntla <rchintakuntla@...ium.com>
>>
>> This patch modifies the mdio-octeon driver to work on both ThunderX and
>> Octeon SoCs from Cavium Inc.
>>
>> Signed-off-by: Sunil Goutham <sgoutham@...ium.com>
>> Signed-off-by: Radha Mohan Chintakuntla <rchintakuntla@...ium.com>
>> Signed-off-by: David Daney <david.daney@...ium.com>
>> ---
>>   drivers/net/phy/Kconfig       |    9 ++-
>>   drivers/net/phy/mdio-octeon.c |  122
>> +++++++++++++++++++++++++++++++++++-----
>>   2 files changed, 111 insertions(+), 20 deletions(-)
>>
>> diff --git a/drivers/net/phy/Kconfig b/drivers/net/phy/Kconfig
>> index cf18940..0d6af19 100644
>> --- a/drivers/net/phy/Kconfig
>> +++ b/drivers/net/phy/Kconfig
>> @@ -145,13 +145,14 @@ config MDIO_GPIO
>>           will be called mdio-gpio.
>>
>>   config MDIO_OCTEON
>> -       tristate "Support for MDIO buses on Octeon SOCs"
>> -       depends on CAVIUM_OCTEON_SOC
>> +       tristate "Support for MDIO buses on Octeon and ThunderX SOCs"
>> +       depends on 64BIT
>>         default y
>
>
> If it now depends only on 64BIT, we should probably remove the "default".
> People building for x86 are not interested in this driver.
>

Ok got it.

>
> [...]
>>
>>
>> +#ifdef __BIG_ENDIAN_BITFIELD
>> +#define OCT_MDIO_BITFIELD_FIELD(field, more)   \
>> +       field;                                  \
>> +       more
>> +
>> +#else
>> +#define OCT_MDIO_BITFIELD_FIELD(field, more)   \
>> +       more                                    \
>> +       field;
>> +
>> +#endif
>> +
>> +union cvmx_smix_clk {
>> +       uint64_t u64;
>
>
> Perhaps: s/uint64_t/u64/
>
> There are several of these.

Ok will do. If there aren;t any more comments I will re-submit another version.

>
>
>> +       struct cvmx_smix_clk_s {
>> +         OCT_MDIO_BITFIELD_FIELD(u64 reserved_25_63:39,
>> +         OCT_MDIO_BITFIELD_FIELD(u64 mode:1,
>> +         OCT_MDIO_BITFIELD_FIELD(u64 reserved_21_23:3,
>> +         OCT_MDIO_BITFIELD_FIELD(u64 sample_hi:5,
>> +         OCT_MDIO_BITFIELD_FIELD(u64 sample_mode:1,
>> +         OCT_MDIO_BITFIELD_FIELD(u64 reserved_14_14:1,
>> +         OCT_MDIO_BITFIELD_FIELD(u64 clk_idle:1,
>> +         OCT_MDIO_BITFIELD_FIELD(u64 preamble:1,
>> +         OCT_MDIO_BITFIELD_FIELD(u64 sample:4,
>> +         OCT_MDIO_BITFIELD_FIELD(u64 phase:8,
>> +         ;))))))))))
>> +       } s;
>> +};
>> +
>
> [...]
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