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authorMichal Simek <michal.simek@xilinx.com>2013-06-03 14:31:16 +0200
committerLinus Walleij <linus.walleij@linaro.org>2013-06-17 07:38:50 +0200
commit6f8bf50031a68f533ae7eba3d3277c38ee7806f5 (patch)
tree58430315d7f81a74155699d24203acb087574707 /drivers/gpio
parent644c8df2fb276e6cdfab18d60e9e0bf7a5b65b9a (diff)
downloadlinux-6f8bf50031a68f533ae7eba3d3277c38ee7806f5.tar.bz2
GPIO: xilinx: Simplify driver probe function
Simplification is done by using OF helper function which increase readability of code and remove (if (var) var = be32_to_cpup;) assignment. Signed-off-by: Michal Simek <michal.simek@xilinx.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/gpio')
-rw-r--r--drivers/gpio/gpio-xilinx.c24
1 files changed, 10 insertions, 14 deletions
diff --git a/drivers/gpio/gpio-xilinx.c b/drivers/gpio/gpio-xilinx.c
index 9ae7aa8ca48a..2aad53497a63 100644
--- a/drivers/gpio/gpio-xilinx.c
+++ b/drivers/gpio/gpio-xilinx.c
@@ -170,24 +170,20 @@ static int xgpio_of_probe(struct device_node *np)
return -ENOMEM;
/* Update GPIO state shadow register with default value */
- tree_info = of_get_property(np, "xlnx,dout-default", NULL);
- if (tree_info)
- chip->gpio_state = be32_to_cpup(tree_info);
+ of_property_read_u32(np, "xlnx,dout-default", &chip->gpio_state);
+
+ /* By default, all pins are inputs */
+ chip->gpio_dir = 0xFFFFFFFF;
/* Update GPIO direction shadow register with default value */
- chip->gpio_dir = 0xFFFFFFFF; /* By default, all pins are inputs */
- tree_info = of_get_property(np, "xlnx,tri-default", NULL);
- if (tree_info)
- chip->gpio_dir = be32_to_cpup(tree_info);
+ of_property_read_u32(np, "xlnx,tri-default", &chip->gpio_dir);
+
+ /* By default assume full GPIO controller */
+ chip->mmchip.gc.ngpio = 32;
/* Check device node and parent device node for device width */
- chip->mmchip.gc.ngpio = 32; /* By default assume full GPIO controller */
- tree_info = of_get_property(np, "xlnx,gpio-width", NULL);
- if (!tree_info)
- tree_info = of_get_property(np->parent,
- "xlnx,gpio-width", NULL);
- if (tree_info)
- chip->mmchip.gc.ngpio = be32_to_cpup(tree_info);
+ of_property_read_u32(np, "xlnx,gpio-width",
+ (u32 *)&chip->mmchip.gc.ngpio);
spin_lock_init(&chip->gpio_lock);