[patch 1/2] Add dt_compat field to struct gpio_chip

[Domenico Andreoli]

From: Domenico Andreoli <cavokz at gmail.com>

This new field allows easy creation of GPIO chips in base of struct arrays.

Signed-off-by: Domenico Andreoli <cavokz at gmail.com>

---
 drivers/of/gpio.c          |    3 +++
 include/asm-generic/gpio.h |    1 +
 2 files changed, 4 insertions(+)

Index: b/drivers/of/gpio.c
===================================================================
--- a/drivers/of/gpio.c	2011-04-07 18:19:20.000000000 +0200
+++ b/drivers/of/gpio.c	2011-04-07 18:20:31.000000000 +0200
@@ -212,6 +212,9 @@
 
 void of_gpiochip_add(struct gpio_chip *chip)
 {
+	if ((!chip->of_node) && (chip->dt_compat))
+		chip->of_node = of_find_compatible_node(NULL, NULL, chip->dt_compat);
+
 	if ((!chip->of_node) && (chip->dev))
 		chip->of_node = chip->dev->of_node;
 
Index: b/include/asm-generic/gpio.h
===================================================================
--- a/include/asm-generic/gpio.h	2011-04-07 18:19:20.000000000 +0200
+++ b/include/asm-generic/gpio.h	2011-04-07 18:19:30.000000000 +0200
@@ -129,6 +129,7 @@
 	int of_gpio_n_cells;
 	int (*of_xlate)(struct gpio_chip *gc, struct device_node *np,
 		        const void *gpio_spec, u32 *flags);
+	const char *dt_compat;
 #endif
 };