linux-kernel - Re: [PATCH V3 3/4] gpio: tegra: Get rid of all file scoped global variables

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Date:	Thu, 21 Apr 2016 12:33:46 -0600
From:	Stephen Warren <swarren@...dotorg.org>
To:	Laxman Dewangan <ldewangan@...dia.com>
Cc:	linus.walleij@...aro.org, gnurou@...il.com,
	thierry.reding@...il.com, linux-gpio@...r.kernel.org,
	linux-tegra@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH V3 3/4] gpio: tegra: Get rid of all file scoped global
 variables

On 04/20/2016 07:30 AM, Laxman Dewangan wrote:
> Move the file scoped multiple global variable from Tegra GPIO
> driver to the structure and make this as gpiochip data which
> can be referred from GPIO chip callbacks.

> diff --git a/drivers/gpio/gpio-tegra.c b/drivers/gpio/gpio-tegra.c

> +#define GPIO_MSK_CNF(t, x)	(GPIO_REG(t, x) + t->soc->upper_offset + 0x00)
> +#define GPIO_MSK_OE(t, x)	(GPIO_REG(t, x) + t->soc->upper_offset + 0x10)
> +#define GPIO_MSK_OUT(t, x)	(GPIO_REG(t, x) + t->soc->upper_offset + 0X20)
> +#define GPIO_MSK_INT_STA(t, x)	(GPIO_REG(t, x) + t->soc->upper_offset + 0x40)
> +#define GPIO_MSK_INT_ENB(t, x)	(GPIO_REG(t, x) + t->soc->upper_offset + 0x50)
> +#define GPIO_MSK_INT_LVL(t, x)	(GPIO_REG(t, x) + t->soc->upper_offset + 0x60)
> +#define GPIO_MSK_DBC_EN(t, x)	(GPIO_REG(t, x) + t->soc->upper_offset + 0x30)

DBC_EN/0x30 should be sorted correctly with the rest, and likely added 
in patch 4 instead.

> @@ -276,19 +307,25 @@ static void tegra_gpio_irq_handler(struct irq_desc *desc)

> +	struct tegra_gpio_info *tgi = bank->tgi;
> +
>
>   	chained_irq_enter(chip, desc);

No need for 2 blank lines there.

> @@ -410,7 +462,7 @@ static int dbg_gpio_show(struct seq_file *s, void *unused)
>
>   static int dbg_gpio_open(struct inode *inode, struct file *file)
>   {
> -	return single_open(file, dbg_gpio_show, &inode->i_private);
> +	return single_open(file, dbg_gpio_show, inode->i_private);

Can you explain that change? I'm not sure it's correct, but don't know 
why it was made.

Once those are fixed,
Reviewed-by: Stephen Warren <swarren@...dia.com>