linux-kernel - Re: [PATCH] ARM: OMAP2+: am335x-bone*: add DT for BeagleBone Black

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Date:	Mon, 09 Sep 2013 07:50:45 -0700
From:	Kevin Hilman <khilman@...aro.org>
To:	Koen Kooi <koen@...inion.thruhere.net>
Cc:	George Cherian <george.cherian@...com>,
	<linux-omap@...r.kernel.org>, <bcousson@...libre.com>,
	<tony@...mide.com>, <rob.herring@...xeda.com>,
	<pawel.moll@....com>, <mark.rutland@....com>,
	<swarren@...dotorg.org>, <ijc+devicetree@...lion.org.uk>,
	<linux@....linux.org.uk>, <devicetree@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>,
	<linux-kernel@...r.kernel.org>, <olof@...om.net>
Subject: Re: [PATCH] ARM: OMAP2+: am335x-bone*: add DT for BeagleBone Black

Koen Kooi <koen@...inion.thruhere.net> writes:

> Op 6 sep. 2013, om 10:51 heeft Koen Kooi <koen@...inion.thruhere.net> het volgende geschreven:
>
>> 
>> Op 6 sep. 2013, om 09:10 heeft Koen Kooi <koen@...inion.thruhere.net> het volgende geschreven:
>> 
>>> 
>>> Op 6 sep. 2013, om 08:57 heeft George Cherian <george.cherian@...com> het volgende geschreven:
>>> 
>>>> On 9/6/2013 12:03 PM, Koen Kooi wrote:
>>>>> The BeagleBone Black is basically a regular BeagleBone with eMMC and HDMI added,
>>>>> so create a common dtsi both can use. MMC support for AM335x still isn't in, so
>>>>> only the LDO change has been added.
>>>>> 
>>>>> Signed-off-by: Koen Kooi <koen@...inion.thruhere.net>
>>>>> ---
>>>>> .../{am335x-bone.dts => am335x-bone-common.dtsi}   |   3 -
>>>>> arch/arm/boot/dts/am335x-bone.dts                  | 256 +--------------------
>>>>> arch/arm/boot/dts/am335x-boneblack.dts             |  18 ++
>>>>> 3 files changed, 19 insertions(+), 258 deletions(-)
>>>>> copy arch/arm/boot/dts/{am335x-bone.dts => am335x-bone-common.dtsi} (99%)
>>>>> create mode 100644 arch/arm/boot/dts/am335x-boneblack.dts
>>>> How did you test am335x-boneblack.dtb? where are the Makefile changes for boneblack?
>>> 
>>> Ah, I missed the makefile in my commit. I have a bunch of other patches on top to make more stuff work.
>>> 
>>> [..]
>>> 
>>>>> 
>>>>> --- /dev/null
>>>>> +++ b/arch/arm/boot/dts/am335x-boneblack.dts
>>>>> @@ -0,0 +1,18 @@
>>>>> +/*
>>>>> + * Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com/
>>>>> + *
>>>>> + * This program is free software; you can redistribute it and/or modify
>>>>> + * it under the terms of the GNU General Public License version 2 as
>>>>> + * published by the Free Software Foundation.
>>>>> + */
>>>>> +/dts-v1/;
>>>>> +
>>>>> +#include "am33xx.dtsi"
>>>> Why cant we add am33xx.dtsi  in am335x-bone-common.dtsi ?
>>> 
>>> That didn't work when I tried it. It did work before the preprocessor changes when using /include/
>>> 
>>>>> +#include "am335x-bone-common.dtsi"
>>>>> +
>>>>> +&ldo3_reg {
>>>>> +	regulator-min-microvolt = <1800000>;
>>>>> +	regulator-max-microvolt = <1800000>;
>>>>> +	regulator-always-on;
>>>>> +};
>>>>> +
>>>> With this ldo values mmc was not working for me on Boneblack.
>>>> got it working with
>>>> 
>>>> &ldo3_reg {
>>>> 	regulator-min-microvolt = <1800000>;
>>>> 	regulator-max-microvolt = <3300000>;
>>>> 	regulator-always-on;
>>>> };
>>> 
>>> That LDO is shared, the other consumer will get fried if you use 3.3V. I forget if it's DDR3 or HDMI.
>> 
>> On the black the LDOs changed, so for mmc (which (*$)@()$@) still isn't in mainline) you need:
>> 
>> diff --git a/arch/arm/boot/dts/am335x-bone-common.dtsi b/arch/arm/boot/dts/am335x-bone-common.dtsi
>> index e76d575..ae90a30 100644
>> --- a/arch/arm/boot/dts/am335x-bone-common.dtsi
>> +++ b/arch/arm/boot/dts/am335x-bone-common.dtsi
>> @@ -362,6 +362,13 @@
>>                        regulator-always-on;
>>                };
>>        };
>> +
>> +       vmmcsd_fixed: fixedregulator@0 {
>> +               compatible = "regulator-fixed";
>> +               regulator-name = "vmmcsd_fixed";
>> +               regulator-min-microvolt = <3300000>;
>> +               regulator-max-microvolt = <3300000>;
>> +       };
>> };
>> 
>> &cpsw_emac0 {
>> diff --git a/arch/arm/boot/dts/am335x-boneblack.dts b/arch/arm/boot/dts/am335x-boneblack.dts
>> index b4237fc..e092a61 100644
>> --- a/arch/arm/boot/dts/am335x-boneblack.dts
>> +++ b/arch/arm/boot/dts/am335x-boneblack.dts
>> @@ -16,7 +16,12 @@
>>        regulator-always-on;
>> };
>> 
>> -&mmc2 {
>> +&mmc1 { 
>> +       vmmc-supply = <&vmmcsd_fixed>;
>> +};
>> +
>> +&mmc2 { 
>> +       vmmc-supply = <&vmmcsd_fixed>;
>>        pinctrl-names = "default";
>>        pinctrl-0 = <&emmc_pins>;
>>        vmmc-supply = <&ldo3_reg>;
>
> And links to all the patches:
>
> Card-detect fix: https://github.com/koenkooi/linux/commit/c3c87f330812275ce6aa791e2a81f4c124fe981b
> Add eMMC DT node: https://github.com/koenkooi/linux/commit/22459b61a7e80e05ab1cd02b9ec0a4467bf9fa4b
> Fix mmc regulator: https://github.com/koenkooi/linux/commit/8007217893b7d809782e08fa1f0d56b1083ec00d
>
> As soon as TI gets their act together and the EDMA/MMC patchset is in
> Linus' tree I'll rebase and submit the above properly.

In the meantime, can you resubmit the minimal splitup with the LDO
change?

Thanks,

Kevin
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