linux-kernel - Re: [PATCH v2 1/4] dt-bindings: pinctrl: k3: Introduce pinmux definitions

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Date:   Mon, 19 Nov 2018 09:19:38 +0200
From:   Tero Kristo <t-kristo@...com>
To:     Nishanth Menon <nm@...com>, Vignesh R <vigneshr@...com>
CC:     Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <devicetree@...r.kernel.org>, <linux-omap@...r.kernel.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        Tony Lindgren <tony@...mide.com>
Subject: Re: [PATCH v2 1/4] dt-bindings: pinctrl: k3: Introduce pinmux
 definitions

On 17/11/2018 18:05, Nishanth Menon wrote:
> On 11:31-20181113, Vignesh R wrote:
>> The dt-bindings header for TI K3 AM6 SoCs define a set of macros for
>> defining pinmux configs in human readable form, instead of raw-coded
>> hex values.
>>
>> Signed-off-by: Vignesh R <vigneshr@...com>
>> ---
>>   MAINTAINERS                      |  1 +
>>   include/dt-bindings/pinctrl/k3.h | 35 ++++++++++++++++++++++++++++++++
>>   2 files changed, 36 insertions(+)
>>   create mode 100644 include/dt-bindings/pinctrl/k3.h
>>
>> diff --git a/MAINTAINERS b/MAINTAINERS
>> index fa45ff36fde9..1574ad6d7ead 100644
>> --- a/MAINTAINERS
>> +++ b/MAINTAINERS
>> @@ -2204,6 +2204,7 @@ S:	Supported
>>   F:	Documentation/devicetree/bindings/arm/ti/k3.txt
>>   F:	arch/arm64/boot/dts/ti/Makefile
>>   F:	arch/arm64/boot/dts/ti/k3-*
>> +F:	include/dt-bindings/pinctrl/k3.h
>>   
>>   ARM/TEXAS INSTRUMENT KEYSTONE ARCHITECTURE
>>   M:	Santosh Shilimkar <ssantosh@...nel.org>
>> diff --git a/include/dt-bindings/pinctrl/k3.h b/include/dt-bindings/pinctrl/k3.h
>> new file mode 100644
>> index 000000000000..463d845a9b36
>> --- /dev/null
>> +++ b/include/dt-bindings/pinctrl/k3.h
>> @@ -0,0 +1,35 @@
>> +/* SPDX-License-Identifier: GPL-2.0 */
>> +/*
>> + * This header provides constants for pinctrl bindings for TI's K3 SoC
>> + * family.
>> + *
>> + * Copyright (C) 2018 Texas Instruments Incorporated - http://www.ti.com/
>> + */
>> +#ifndef _DT_BINDINGS_PINCTRL_TI_K3_H
>> +#define _DT_BINDINGS_PINCTRL_TI_K3_H
>> +
>> +#define PULLUDEN_SHIFT		(16)
>> +#define PULLTYPESEL_SHIFT	(17)
>> +#define RXACTIVE_SHIFT		(18)
>> +
>> +#define PULL_DISABLE		(1 << PULLUDEN_SHIFT)
>> +#define PULL_ENABLE		(0 << PULLUDEN_SHIFT)
>> +
>> +#define PULL_UP			(1 << PULLTYPESEL_SHIFT | PULL_ENABLE)
>> +#define PULL_DOWN		(0 << PULLTYPESEL_SHIFT | PULL_ENABLE)
>> +
>> +#define INPUT_EN		(1 << RXACTIVE_SHIFT)
>> +#define INPUT_DISABLE		(0 << RXACTIVE_SHIFT)
>> +
>> +/* Only these macros are expected be used directly in device tree files */
>> +#define PIN_OUTPUT		(INPUT_DISABLE | PULL_DISABLE)
>> +#define PIN_OUTPUT_PULLUP	(INPUT_DISABLE | PULL_UP)
>> +#define PIN_OUTPUT_PULLDOWN	(INPUT_DISABLE | PULL_DOWN)
>> +#define PIN_INPUT		(INPUT_EN | PULL_DISABLE)
>> +#define PIN_INPUT_PULLUP	(INPUT_EN | PULL_UP)
>> +#define PIN_INPUT_PULLDOWN	(INPUT_EN | PULL_DOWN)
> 
> 
> Thanks for reducing the combinations down to the minimum needed. We can
> worry about the DS and isolation bits when we have a real user for them.
> 
> Acked-by: Nishanth Menon <nm@...com>
> 
> Tero: v4.21-rc1 perhaps ?
> 

Yeah, looks fine, queueing up for 4.21.

-Tero
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