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Message-ID: <CAAfyv34kOtwjerB0gMhEKNTwGd9w-LCE52MCUuvzTyYkXLY-dg@mail.gmail.com>
Date: Sat, 13 Aug 2011 11:49:18 +0200
From: Belisko Marek <marek.belisko@...il.com>
To: Stephen Warren <swarren@...dia.com>
Cc: Grant Likely <grant.likely@...retlab.ca>,
Colin Cross <ccross@...roid.com>,
Erik Gilling <konkers@...roid.com>,
Olof Johansson <olof@...om.net>,
Russell King <linux@....linux.org.uk>,
Arnd Bergmann <arnd@...db.de>,
devicetree-discuss@...ts.ozlabs.org, linux-tegra@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCH 08/12] gpio/tegra: Add device tree support
On Sat, Aug 13, 2011 at 12:54 AM, Stephen Warren <swarren@...dia.com> wrote:
> Signed-off-by: Stephen Warren <swarren@...dia.com>
> ---
> drivers/gpio/gpio-tegra.c | 31 +++++++++++++++++++++++++++++++
> 1 files changed, 31 insertions(+), 0 deletions(-)
>
> diff --git a/drivers/gpio/gpio-tegra.c b/drivers/gpio/gpio-tegra.c
> index 4da4839..923b413 100644
> --- a/drivers/gpio/gpio-tegra.c
> +++ b/drivers/gpio/gpio-tegra.c
> @@ -326,6 +326,29 @@ static struct irq_chip tegra_gpio_irq_chip = {
> #endif
> };
>
> +#ifdef CONFIG_OF
> +static void __init tegra_gpio_probe_dt(struct platform_device *pdev)
> +{
> + const __be32 *gpios;
> + u32 gpioslen;
> + int i;
> +
> + gpios = of_get_property(pdev->dev.of_node, "nvidia,gpios", &gpioslen);
> + if (gpios == NULL)
> + return;
> +
> + gpioslen /= sizeof(*gpios);
> + for (i = 0; i < gpioslen; i++, gpios++) {
> + u32 gpio = be32_to_cpup(gpios);
> + dev_err(&pdev->dev, "Enabling GPIO %d\n", gpio);
Is really necessary to print all enabled gpio's to console? Also seen
same in pinmux probe.
> + tegra_gpio_enable(gpio);
> + }
> +}
> +#else
> +static inline void __init tegra_gpio_probe_dt(struct platform_device *pdev)
> +{
> +}
> +#endif
>
> /* This lock class tells lockdep that GPIO irqs are in a different
> * category than their parents, so it won't report false recursion.
> @@ -371,13 +394,21 @@ static int __init tegra_gpio_probe(struct platform_device *pdev)
> spin_lock_init(&bank->lvl_lock[j]);
> }
>
> + tegra_gpio_probe_dt(pdev);
> +
> return 0;
> }
>
> +static struct of_device_id tegra_gpio_of_match[] __devinitdata = {
> + { .compatible = "nvidia,tegra20-gpio", },
> + { },
> +};
> +
> static struct platform_driver tegra_gpio_driver = {
> .driver = {
> .name = "tegra-gpio",
> .owner = THIS_MODULE,
> + .of_match_table = tegra_gpio_of_match,
> },
> .probe = tegra_gpio_probe,
> };
> --
> 1.7.0.4
>
> --
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regards,
marek
--
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-------------------------------------------------
Marek Belisko - OPEN-NANDRA
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