linux-kernel - Re: [PATCH v7 1/3] gpio: dwapb: remove name from dwapb_port

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Date:	Thu, 7 Apr 2016 19:45:30 +0800
From:	Jiang Qiu <qiujiang@...wei.com>
To:	Andy Shevchenko <andy.shevchenko@...il.com>
CC:	Linus Walleij <linus.walleij@...aro.org>,
	Alexandre Courbot <gnurou@...il.com>,
	Mika Westerberg <mika.westerberg@...ux.intel.com>,
	"Alan Tull" <delicious.quinoa@...il.com>,
	Jamie Iles <jamie@...ieiles.com>, <charles.chenxin@...wei.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>,
	"linux-acpi@...r.kernel.org" <linux-acpi@...r.kernel.org>,
	<linuxarm@...wei.com>
Subject: Re: [PATCH v7 1/3] gpio: dwapb: remove name from dwapb_port_property

Hi Andy,

Thanks for your reply. See my comments inline.

Thanks
Jiang

在 2016/4/6 20:57, Andy Shevchenko 写道:
> On Wed, Apr 6, 2016 at 10:07 AM, qiujiang <qiujiang@...wei.com> wrote:
>> This patch removed the name property from dwapb_port_property.
>> The name property is redundant because we can get those info
>> from dwapb_gpio dev and pp->idx property.
> 
> Where idx is used in such replacements?
Actually, it is not used so far. As Alan mentioned, the only additional
info from the pp->name against dev is the port index. I present here to
prevent anyone from missing it.

If it is inappropriate, I will remove it.

> 
>> --- a/drivers/gpio/gpio-dwapb.c
>> +++ b/drivers/gpio/gpio-dwapb.c
>> @@ -409,8 +409,7 @@ static int dwapb_gpio_add_port(struct dwapb_gpio *gpio,
>>         err = bgpio_init(&port->gc, gpio->dev, 4, dat, set, NULL, dirout,
>>                          NULL, false);
>>         if (err) {
>> -               dev_err(gpio->dev, "failed to init gpio chip for %s\n",
>> -                       pp->name);
>> +               dev_err(gpio->dev, "failed to init gpio chip\n");
> 
> Do we have any port index here available (expected value I suppose)?

The 3rd parameter 'offs' can be used, I will add it.
> 
>> @@ -429,8 +428,7 @@ static int dwapb_gpio_add_port(struct dwapb_gpio *gpio,
>>
>>         err = gpiochip_add_data(&port->gc, port);
>>         if (err)
>> -               dev_err(gpio->dev, "failed to register gpiochip for %s\n",
>> -                       pp->name);
>> +               dev_err(gpio->dev, "failed to register gpiochip\n");
> 
> Ditto.
> 
> 
>> @@ -499,15 +498,12 @@ dwapb_gpio_get_pdata_of(struct device *dev)
>>                 if (pp->idx == 0 &&
>>                     of_property_read_bool(port_np, "interrupt-controller")) {
>>                         pp->irq = irq_of_parse_and_map(port_np, 0);
>> -                       if (!pp->irq) {
>> -                               dev_warn(dev, "no irq for bank %s\n",
>> -                                        port_np->full_name);
>> -                       }
>> +                       if (!pp->irq)
>> +                               dev_warn(dev, "no irq for this bank\n");
> 
> pp->idx here?
> 
> dev_warn(dev, "no irq for port%d\n", pp->idx);

Here, pp->idx should always be zero, means portA, because only portA can be a
interrupt controller as dwapb gpio IP defined. So, I omited it.

> 
>> --- a/drivers/mfd/intel_quark_i2c_gpio.c
>> +++ b/drivers/mfd/intel_quark_i2c_gpio.c
>> @@ -220,7 +220,6 @@ static int intel_quark_gpio_setup(struct pci_dev *pdev, struct mfd_cell *cell)
>>
>>         /* Set the properties for portA */
>>         pdata->properties->node         = NULL;
>> -       pdata->properties->name         = "intel-quark-x1000-gpio-portA";
>>         pdata->properties->idx          = 0;
>>         pdata->properties->ngpio        = INTEL_QUARK_MFD_NGPIO;
>>         pdata->properties->gpio_base    = INTEL_QUARK_MFD_GPIO_BASE;
> 
> For Quark part:
> Acked-by: Andy Shevchenko <andy.shevchenko@...il.com>
>