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Message-ID: <56AB1FB5.3080603@gmail.com>
Date: Fri, 29 Jan 2016 16:15:49 +0800
From: Peter Hung <hpeter@...il.com>
To: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
linus.walleij@...aro.org, gnurou@...il.com,
gregkh@...uxfoundation.org, paul.gortmaker@...driver.com,
lee.jones@...aro.org, jslaby@...e.com, peter_hong@...tek.com.tw
Cc: heikki.krogerus@...ux.intel.com, peter@...leysoftware.com,
soeren.grunewald@...y.de, udknight@...il.com,
adam.lee@...onical.com, arnd@...db.de, manabian@...il.com,
scottwood@...escale.com, yamada.masahiro@...ionext.com,
paul.burton@...tec.com, mans@...sr.com, matthias.bgg@...il.com,
ralf@...ux-mips.org, linux-kernel@...r.kernel.org,
linux-gpio@...r.kernel.org, linux-serial@...r.kernel.org,
tom_tsai@...tek.com.tw, Peter Hung <hpeter+linux_kernel@...il.com>
Subject: Re: [PATCH V2 2/4] gpio: gpio-f81504: Add Fintek F81504/508/512
PCIE-to-UART/GPIO GPIOLIB support
Hi Andy,
Andy Shevchenko 於 2016/1/28 下午 08:03 寫道:
> On Thu, 2016-01-28 at 17:20 +0800, Peter Hung wrote:
>> + /* set output data */
>> + tmp = inb(priv->gpio_ioaddr + gc->idx);
>
> ioread8 is a bit better since it automatically works with IO space and
> MMIO. But if you are certain you will always have the address in IO
> space, you can disregard this comment.
I had only tested on x86 environment currently. We'll try to get an ARM
platform with PCIE to test it. We'll remain it until getting new board.
>> +static int f81504_gpio_probe(struct platform_device *pdev)
>> +{
>> + int status;
>> + struct f81504_gpio_chip *gc;
>> + void *data = dev_get_platdata(&pdev->dev);
>> + u8 gpio_idx = *(u8 *)data;
>> + char *name;
>> +
>> + if (gpio_idx >= ARRAY_SIZE(fintek_gpio_mapping)) {
>> + dev_err(&pdev->dev, "%s: gpio_idx:%d out of
>> range.\n",
>> + __func__, gpio_idx);
>> + return -ENODEV;
>> + }
>> +
>> + gc = devm_kzalloc(&pdev->dev, sizeof(*gc), GFP_KERNEL);
>> + if (!gc)
>> + return -ENOMEM;
>> +
>>
>
>> + kfree(data);
>
> What the heck?
Sorry for the big mistake, I'd confused for dev_get_platdata() &
platform_set_drvdata(). I'll rewrite this and check 8250_f81504.c
too.
>> + status = gpiochip_add(&gc->chip);
>> + if (status) {
>> + dev_err(&pdev->dev, "%s: gpiochip_add failed: %d\n",
>> __func__,
>> + status);
>> + return -ENOMEM;
>
> You ignored the status.
>
>> + }
>> +
>> + return 0;
>
> Perhaps just
> return gpiochip_add(); ?
Just return gpiochip_add() seems good.
Thanks your advices
--
With Best Regards,
Peter Hung
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