linux-kernel - Re: [PATCH v4 1/1] ARM: mvebu: dts: Add dts file for DLink DNS-327L

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Date:	Mon, 25 May 2015 13:17:37 +0200
From:	Gregory CLEMENT <gregory.clement@...e-electrons.com>
To:	Andrew <andrew@...mnt.org>
CC:	Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
	Jason Cooper <jason@...edaemon.net>,
	Andrew Lunn <andrew@...n.ch>,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	devicetree@...r.kernel.org
Subject: Re: [PATCH v4 1/1] ARM: mvebu: dts: Add dts file for DLink DNS-327L

Hi Andrew,

On 20/05/2015 13:00, Sebastian Hesselbarth wrote:
> On 20.05.2015 12:20, Andrew wrote:
>> Sebastian Hesselbarth писал 20.05.2015 12:05:
>>> On 19.05.2015 23:10, Andrew Andrianov wrote:
>>>> DNS-327L is a 2-bay NAS with the following specs:
>>> [...]
>>>> Signed-off-by: Andrew Andrianov <andrew@...mnt.org>
>>>> ---
>>>>   arch/arm/boot/dts/Makefile                     |   1 +
>>>>   arch/arm/boot/dts/armada-370-dlink-dns327l.dts | 356
>>>> +++++++++++++++++++++++++
>>>>   2 files changed, 357 insertions(+)
>>>>   create mode 100644 arch/arm/boot/dts/armada-370-dlink-dns327l.dts
>>> [...]
>>>> diff --git a/arch/arm/boot/dts/armada-370-dlink-dns327l.dts
>>>> b/arch/arm/boot/dts/armada-370-dlink-dns327l.dts
>>>> new file mode 100644
>>>> index 0000000..0f4555c4
>>>> --- /dev/null
>>>> +++ b/arch/arm/boot/dts/armada-370-dlink-dns327l.dts
>>>> @@ -0,0 +1,356 @@
>>> [...]
>>>> +    regulators {
>>>> +        compatible = "simple-bus";
>>>> +        #address-cells = <1>;
>>>> +        #size-cells = <0>;
>>>> +        pinctrl-0 = <&xhci_pwr_pin
>>>> +            &sata_l_pwr_pin
>>>> +            &sata_r_pwr_pin>;
>>>> +
>>>> +        pinctrl-names = "default";
>>>
>>> I doubt pinctrl will not work as you expected. For regulators, unlike
>>> gpio-keys/leds above, this node just describes the "bus" of regulators.
>>
>> Are you sure about this moment? FYI: I've taken
>> armada-370-synology-ds213j.dts
>> as the reference which happens to list regulator pinctrl (As of 4.1-rc1)
>> just the same way:
>>
>>      compatible = "simple-bus";
>>          #address-cells = <1>;
>>          #size-cells = <0>;
>>          pinctrl-0 = <&sata1_pwr_pin &sata2_pwr_pin>;
>>          pinctrl-names = "default";
>>                  ...
> 
> Well, even if it works the pinctrl should be claimed by the device that
> actually depends on it, i.e. the regulator itself.
> 
>> If that's erroneous we should fix armada-370-synology-ds213j.dts as well.
> 
> Most likely nobody ever noticed if that didn't work because (a) usually
> gpio functions are setup by the bootloader or (b) gpio is default reset
> value of the pinctrl registers anyway.
> 
> I'd say move the pinctrl properties to regulator nodes for dns-327l now
> and we move the properties for ds213j in a separate patch.

Usually the merge windows for arm-soc is closed when the rc6 is released which should
happen at the end of this week. If you manged to send a new version this week, then I
will apply it on mvebu/dt and it should be part of our next pull request.

Thanks,

Gregory



> 
> Sebastian
> 
>>>> +
>>>> +        usb_power: regulator@1 {
>>>> +            compatible = "regulator-fixed";
>>>> +            reg = <1>;
>>>> +            regulator-name = "USB3.0 Port Power";
>>>> +            regulator-min-microvolt = <5000000>;
>>>> +            regulator-max-microvolt = <5000000>;
>>>> +            enable-active-high;
>>>> +            regulator-boot-on;
>>>> +            regulator-always-on;
>>>> +            gpio = <&gpio0 13 GPIO_ACTIVE_HIGH>;
>>>
>>> Instead you'll have to put the corresponding pinctrl-0/names properties
>>> in each of the regulator nodes, i.e.
>>>
>>>         pinctrl-0 = <&xhci_pwr_pin>
>>>         pinctrl-names = "default";
>>>
>>> here and similar for the other regulator nodes.
>>>
>>>> +        };
>>>> +
>>>> +        sata_r_power: regulator@2 {
>>>> +            compatible = "regulator-fixed";
>>>> +            reg = <2>;
>>>> +            regulator-name = "SATA-R Power";
>>>> +            regulator-min-microvolt = <5000000>;
>>>> +            regulator-max-microvolt = <5000000>;
>>>> +            startup-delay-us = <2000000>;
>>>> +            enable-active-high;
>>>> +            regulator-always-on;
>>>> +            regulator-boot-on;
>>>> +            gpio = <&gpio1 22 GPIO_ACTIVE_HIGH>;
>>>> +        };
>>>> +
>>>> +        sata_l_power: regulator@3 {
>>>> +            compatible = "regulator-fixed";
>>>> +            reg = <3>;
>>>> +            regulator-name = "SATA-L Power";
>>>> +            regulator-min-microvolt = <5000000>;
>>>> +            regulator-max-microvolt = <5000000>;
>>>> +            startup-delay-us = <4000000>;
>>>> +            enable-active-high;
>>>> +            regulator-always-on;
>>>> +            regulator-boot-on;
>>>> +            gpio = <&gpio1 24 GPIO_ACTIVE_HIGH>;
>>>> +        };
>>>> +    };
>>>> +};
> 
> 


-- 
Gregory Clement, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com
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