linux-kernel - Re: [PATCH v2 2/6] GPIO: xilinx: Add support for dual channel

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Date:	Mon, 17 Jun 2013 07:44:37 +0200
From:	Linus Walleij <linus.walleij@...aro.org>
To:	Michal Simek <michal.simek@...inx.com>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Michal Simek <monstr@...str.eu>, Arnd Bergmann <arnd@...db.de>,
	Grant Likely <grant.likely@...aro.org>,
	Rob Herring <rob.herring@...xeda.com>,
	"devicetree-discuss@...ts.ozlabs.org" 
	<devicetree-discuss@...ts.ozlabs.org>
Subject: Re: [PATCH v2 2/6] GPIO: xilinx: Add support for dual channel

On Mon, Jun 3, 2013 at 2:31 PM, Michal Simek <michal.simek@...inx.com> wrote:

> Supporting the second channel in the driver.
> Offset is 0x8 and both channnels share the same
> IRQ.
>
> Signed-off-by: Michal Simek <michal.simek@...inx.com>
>
> ---
> Changes in v2:
> - Use kernel doc format - suggested by Linus Walleij
> - Do not use __raw_readl/__raw_writel IO in this patch
> - Use of_property_read_u32 helper function
> - Use BIT()
> - Change patch subject

Patch is looking overall nice and improves the kernel so
applied.

But check this:

> @@ -202,6 +230,57 @@ static int xgpio_of_probe(struct device_node *np)
>                        np->full_name, status);
>                 return status;
>         }
> +
> +       pr_info("XGpio: %s: registered, base is %d\n", np->full_name,
> +                                                       chip->mmchip.gc.base);
> +
> +       tree_info = of_get_property(np, "xlnx,is-dual", NULL);
> +       if (tree_info && be32_to_cpup(tree_info)) {

Doesn't this work:

if (of_property_read_bool(np, "xlnx,is-dual")) {
(...)

?

Yours,
Linus Walleij
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