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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>
hifive-unleashed-5.1
Michal Simek 2013-06-03 14:31:16 +02:00 committed by Linus Walleij
parent 644c8df2fb
commit 6f8bf50031
1 changed files with 10 additions and 14 deletions
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24
drivers/gpio/gpio-xilinx.c
View File

@ -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);