#include <linux/device.h>
#include <linux/workqueue.h>
#include <linux/mutex.h>
-
+#include <linux/gpio.h>
#include <linux/spi/spi.h>
#include <linux/spi/mcp23s08.h>
-#include <asm/gpio.h>
-
/* Registers are all 8 bits wide.
*
unsigned base;
pdata = spi->dev.platform_data;
- if (!pdata || !gpio_is_valid(pdata->base))
- return -ENODEV;
+ if (!pdata || !gpio_is_valid(pdata->base)) {
+ dev_dbg(&spi->dev, "invalid or missing platform data\n");
+ return -EINVAL;
+ }
for (addr = 0; addr < 4; addr++) {
if (!pdata->chip[addr].is_present)
{
return spi_register_driver(&mcp23s08_driver);
}
-module_init(mcp23s08_init);
+/* register after spi postcore initcall and before
+ * subsys initcalls that may rely on these GPIOs
+ */
+subsys_initcall(mcp23s08_init);
static void __exit mcp23s08_exit(void)
{
module_exit(mcp23s08_exit);
MODULE_LICENSE("GPL");
+MODULE_ALIAS("spi:mcp23s08");