linux-kernel - Re: [PATCH RFC 1/2] spi: pxa2xx: Convert to GPIO descriptor API where possible

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Message-ID: <b411858d-6a09-a3bc-555d-b1e648b9c8ed@siemens.com>
Date:   Fri, 4 Aug 2017 12:18:28 +0200
From:   Jan Kiszka <jan.kiszka@...mens.com>
To:     Mika Westerberg <mika.westerberg@...ux.intel.com>
Cc:     Mark Brown <broonie@...nel.org>, Daniel Mack <daniel@...que.org>,
        Haojian Zhuang <haojian.zhuang@...il.com>,
        Robert Jarzmik <robert.jarzmik@...e.fr>,
        Andy Shevchenko <andy.shevchenko@...il.com>,
        linux-spi <linux-spi@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH RFC 1/2] spi: pxa2xx: Convert to GPIO descriptor API where
 possible

On 2017-08-04 12:10, Mika Westerberg wrote:
> On Thu, Aug 03, 2017 at 01:40:32PM +0200, Jan Kiszka wrote:
>> From: Jan Kiszka <jan.kiszka@...mens.com>
>>
>> We still need to request/free GPIOs passed via the legacy path of
>> pxa2xx_spi_chip::gpio_cs, but we can use the gpiod API otherwise.
>>
>> Consistently use the descriptor API instead of the legacy one.
>>
>> Signed-off-by: Jan Kiszka <jan.kiszka@...mens.com>
> 
> There are some PXA2xx platforms under arch/arm/* which use this driver
> and legacy GPIOs. I wonder if this causes any problems with them?
> 
> That was one of the reasons I did not convert the whole driver over GPIO
> descriptors.

It shouldn't cause problems (famous last words) because I refrained from
changing the interfaces to them. References that come in as legacy GPIO
are still treated like that.

Jan

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