rtc: at91sam9: Convert to platform remove callback returning void

The .remove() callback for a platform driver returns an int which makes
many driver authors wrongly assume it's possible to do error handling by
returning an error code. However the value returned is (mostly) ignored
and this typically results in resource leaks. To improve here there is a
quest to make the remove callback return void. In the first step of this
quest all drivers are converted to .remove_new() which already returns
void.

Trivially convert this driver from always returning zero in the remove
callback to the void returning variant.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Reviewed-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Link: https://lore.kernel.org/r/20230304133028.2135435-7-u.kleine-koenig@pengutronix.de
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

diff --git a/drivers/rtc/rtc-at91sam9.c b/drivers/rtc/rtc-at91sam9.c
index b7b5ea1a4e6726775ce6d2302bcb2cbe566894a9..610f27dfc462dad34ee65e6e81c2e750af8bc2d8 100644 (file)
--- a/drivers/rtc/rtc-at91sam9.c
+++ b/drivers/rtc/rtc-at91sam9.c
@@ -442,7 +442,7 @@ err_clk:
 /*
  * Disable and remove the RTC driver
  */
-static int at91_rtc_remove(struct platform_device *pdev)
+static void at91_rtc_remove(struct platform_device *pdev)
 {
        struct sam9_rtc *rtc = platform_get_drvdata(pdev);
        u32             mr = rtt_readl(rtc, MR);
@@ -451,8 +451,6 @@ static int at91_rtc_remove(struct platform_device *pdev)
        rtt_writel(rtc, MR, mr & ~(AT91_RTT_ALMIEN | AT91_RTT_RTTINCIEN));
 
        clk_disable_unprepare(rtc->sclk);
-
-       return 0;
 }
 
 static void at91_rtc_shutdown(struct platform_device *pdev)
@@ -531,7 +529,7 @@ MODULE_DEVICE_TABLE(of, at91_rtc_dt_ids);
 
 static struct platform_driver at91_rtc_driver = {
        .probe          = at91_rtc_probe,
-       .remove         = at91_rtc_remove,
+       .remove_new     = at91_rtc_remove,
        .shutdown       = at91_rtc_shutdown,
        .driver         = {
                .name   = "rtc-at91sam9",