[PATCH v4 1/1] pps: generators: pps_gen_parport: Switch to use module_parport_driver()

Andy Shevchenko
2022-02-07T14:46:47Z

Switch to use module_parport_driver() to reduce boilerplate code.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Rodolfo Giometti <giometti@enneenne.com>
---

v4: made sure the proper version is taken into consideration
v3: added Ack (Rodolfo), Cc'ed to Greg for picking it up

drivers/pps/generators/pps_gen_parport.c | 42 ++++--------------------
1 file changed, 7 insertions(+), 35 deletions(-)

diff --git a/drivers/pps/generators/pps_gen_parport.c b/drivers/pps/generators/pps_gen_parport.c
index 6a1af7664f3b..b3e084b75c23 100644
--- a/drivers/pps/generators/pps_gen_parport.c
+++ b/drivers/pps/generators/pps_gen_parport.c
@@ -20,8 +20,6 @@
#include <linux/hrtimer.h>
#include <linux/parport.h>

-#define DRVDESC "parallel port PPS signal generator"
-
#define SIGNAL 0
#define NO_SIGNAL PARPORT_CONTROL_STROBE

@@ -180,6 +178,11 @@ static void parport_attach(struct parport *port)
{
struct pardev_cb pps_cb;

+ if (send_delay > SEND_DELAY_MAX) {
+ pr_err("delay value should be not greater then %d\n", SEND_DELAY_MAX);
+ return;
+ }
+
if (attached) {
/* we already have a port */
return;
@@ -231,39 +234,8 @@ static struct parport_driver pps_gen_parport_driver = {
.detach = parport_detach,
.devmodel = true,
};
-
-/* module staff */
-
-static int __init pps_gen_parport_init(void)
-{
- int ret;
-
- pr_info(DRVDESC "\n");
-
- if (send_delay > SEND_DELAY_MAX) {
- pr_err("delay value should be not greater"
- " then %d\n", SEND_DELAY_MAX);
- return -EINVAL;
- }
-
- ret = parport_register_driver(&pps_gen_parport_driver);
- if (ret) {
- pr_err("unable to register with parport\n");
- return ret;
- }
-
- return 0;
-}
-
-static void __exit pps_gen_parport_exit(void)
-{
- parport_unregister_driver(&pps_gen_parport_driver);
- pr_info("hrtimer avg error is %ldns\n", hrtimer_error);
-}
-
-module_init(pps_gen_parport_init);
-module_exit(pps_gen_parport_exit);
+module_parport_driver(pps_gen_parport_driver);

MODULE_AUTHOR("Alexander Gordeev <lasaine@lvk.cs.msu.su>");
-MODULE_DESCRIPTION(DRVDESC);
+MODULE_DESCRIPTION("parallel port PPS signal generator");
MODULE_LICENSE("GPL");
--
2.34.1