linux-kernel - Re: [PATCH v3 10/10] net/macb: add pinctrl consumer support

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Date:	Wed, 31 Oct 2012 11:42:14 +0100
From:	Nicolas Ferre <nicolas.ferre@...el.com>
To:	Joachim Eastwood <manabian@...il.com>
CC:	<netdev@...r.kernel.org>, <davem@...emloft.net>,
	<havard@...nnemoen.net>, <bhutchings@...arflare.com>,
	<linux-arm-kernel@...ts.infradead.org>, <plagnioj@...osoft.com>,
	<patrice.vilchez@...el.com>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v3 10/10] net/macb: add pinctrl consumer support

On 10/30/2012 06:37 PM, Joachim Eastwood :
> On 30 October 2012 11:18, Nicolas Ferre <nicolas.ferre@...el.com> wrote:
>> From: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@...osoft.com>
>>
>> If no pinctrl available just report a warning as some architecture may not
>> need to do anything.
>>
>> Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@...osoft.com>
>> [nicolas.ferre@...el.com: adapt the error path]
>> Signed-off-by: Nicolas Ferre <nicolas.ferre@...el.com>
>> Cc: netdev@...r.kernel.org
>> ---
>>  drivers/net/ethernet/cadence/macb.c | 13 +++++++++++++
>>  1 file changed, 13 insertions(+)
>>
>> diff --git a/drivers/net/ethernet/cadence/macb.c b/drivers/net/ethernet/cadence/macb.c
>> index 4d51877..eae3d74 100644
>> --- a/drivers/net/ethernet/cadence/macb.c
>> +++ b/drivers/net/ethernet/cadence/macb.c
>> @@ -26,6 +26,9 @@
>>  #include <linux/of.h>
>>  #include <linux/of_device.h>
>>  #include <linux/of_net.h>
>> +#include <linux/of_gpio.h>
>> +#include <linux/gpio.h>
> Why are these two headers added?
> I don't see anything from them used in the code added.
> 
> Wouldn't the pinctrl header by itself be sufficient?

It is: I will remove the two unneeded headers in my v4 patch series.

Thanks,

> 
>> +#include <linux/pinctrl/consumer.h>
>>
>>  #include "macb.h"
>>
>> @@ -1472,6 +1475,7 @@ static int __init macb_probe(struct platform_device *pdev)
>>         struct phy_device *phydev;
>>         u32 config;
>>         int err = -ENXIO;
>> +       struct pinctrl *pinctrl;
>>
>>         regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
>>         if (!regs) {
>> @@ -1479,6 +1483,15 @@ static int __init macb_probe(struct platform_device *pdev)
>>                 goto err_out;
>>         }
>>
>> +       pinctrl = devm_pinctrl_get_select_default(&pdev->dev);
>> +       if (IS_ERR(pinctrl)) {
>> +               err = PTR_ERR(pinctrl);
>> +               if (err == -EPROBE_DEFER)
>> +                       goto err_out;
>> +
>> +               dev_warn(&pdev->dev, "No pinctrl provided\n");
>> +       }
>> +
>>         err = -ENOMEM;
>>         dev = alloc_etherdev(sizeof(*bp));
>>         if (!dev)

Best regards,
-- 
Nicolas Ferre
--
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