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iio: stx104: Utilize the module_isa_driver and max_num_isa_dev macros

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The Apex Embedded Systems STX104 DAC drivers does not do anything
special in module init/exit. This patch eliminates the module init/exit
boilerplate code by utilizing the module_isa_driver macro.

Additionally, the max_num_isa_dev macro is utilized to simplify the
determination of maximum possible STX104 devices in the system.

Cc: Jonathan Cameron <jic23@kernel.org>
Cc: Hartmut Knaack <knaack.h@gmx.de>
Cc: Lars-Peter Clausen <lars@metafoo.de>
Cc: Peter Meerwald <pmeerw@pmeerw.net>
Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
William Breathitt Gray 2016-05-01 18:44:11 -04:00 • committed by Greg Kroah-Hartman
parent 136c956845
commit 9c2cfc19e6
1 changed files with 3 additions and 21 deletions
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24
drivers/iio/dac/stx104.c
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@ -33,16 +33,9 @@
}
#define STX104_EXTENT 16
/**
* The highest base address possible for an ISA device is 0x3FF; this results in
* 1024 possible base addresses. Dividing the number of possible base addresses
* by the address extent taken by each device results in the maximum number of
* devices on a system.
*/
#define MAX_NUM_STX104 (1024 / STX104_EXTENT)
static unsigned base[MAX_NUM_STX104];
static unsigned num_stx104;
static unsigned int base[max_num_isa_dev(STX104_EXTENT)];
static unsigned int num_stx104;
module_param_array(base, uint, &num_stx104, 0);
MODULE_PARM_DESC(base, "Apex Embedded Systems STX104 base addresses");
@ -134,18 +127,7 @@ static struct isa_driver stx104_driver = {
}
};
static void __exit stx104_exit(void)
{
isa_unregister_driver(&stx104_driver);
}
static int __init stx104_init(void)
{
return isa_register_driver(&stx104_driver, num_stx104);
}
module_init(stx104_init);
module_exit(stx104_exit);
module_isa_driver(stx104_driver, num_stx104);
MODULE_AUTHOR("William Breathitt Gray <vilhelm.gray@gmail.com>");
MODULE_DESCRIPTION("Apex Embedded Systems STX104 DAC driver");