linux-kernel - Re: [PATCH v2 1/5] phy: berlin-sata: Move PHY

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Date:	Fri, 24 Oct 2014 22:14:55 +0200
From:	Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>
To:	Kishon Vijay Abraham I <kishon@...com>
CC:	Antoine Ténart 
	<antoine.tenart@...e-electrons.com>, devicetree@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 1/5] phy: berlin-sata: Move PHY_BASE into private data
 struct

On 21.10.2014 11:40, Sebastian Hesselbarth wrote:
> On 10/21/2014 11:33 AM, Kishon Vijay Abraham I wrote:
>> On Tuesday 21 October 2014 02:37 PM, Sebastian Hesselbarth wrote:
>>> Currently, Berlin SATA PHY driver assumes PHY_BASE address being
>>> constant. While this PHY_BASE is correct for BG2Q, older BG2 PHY_BASE
>>> is different. Prepare the driver for BG2 support by moving the phy_base
>>> into private driver data.
>>>
>>> Acked-by: Antoine Ténart <antoine.tenart@...e-electrons.com>
>>> Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>
> ...
>>> ---
>>>   drivers/phy/phy-berlin-sata.c | 42
>>> ++++++++++++++++++++++++++++--------------
>>>   1 file changed, 28 insertions(+), 14 deletions(-)
>>>
>>> diff --git a/drivers/phy/phy-berlin-sata.c
>>> b/drivers/phy/phy-berlin-sata.c
>>> index 69ced52d72aa..9682b0f66177 100644
>>> --- a/drivers/phy/phy-berlin-sata.c
>>> +++ b/drivers/phy/phy-berlin-sata.c
>>> @@ -30,7 +30,7 @@
>>>   #define MBUS_WRITE_REQUEST_SIZE_128    (BIT(2) << 16)
>>>   #define MBUS_READ_REQUEST_SIZE_128    (BIT(2) << 19)
>>>
>>> -#define PHY_BASE        0x200
>>> +#define BG2Q_PHY_BASE        0x200
> [...]
>>> +static u32 bg2q_sata_phy_base = BG2Q_PHY_BASE;
>>> +
>>> +static const struct of_device_id phy_berlin_sata_of_match[] = {
>>> +    {
>>> +        .compatible = "marvell,berlin2q-sata-phy",
>>> +        .data = &bg2q_sata_phy_base,
>>
>> Can't the base directly come from dt?
>
> You are suggesting a "marvell,phy-base-address" property, right?
> I have no strong opinion about it, I accept your call (or DT maintainer
> ones).

Kishon,

I still have the DT patches for BG2Q queued up for v3.19 (I missed the
arm-soc merge window for v3.18). That means, there has been no release
with the phy binding used and I can rework a little more.

Can you please confirm that you want a DT property for the phy base 
address, e.g. marvell,phy-base-address = <{0x200,0x80}> ?

If so, I'd also rename the compatible from berlin2q-sata-phy to more
generic berlin-sata-phy.

Sebastian
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