[RFC PATCH 08/12] gpio/tegra: Add device tree support

Signed-off-by: Stephen Warren <redacted>
---
?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);

+ ? ? ? ? ? ? ? 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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