The RTC_OSC_REG register is 32-bit, but the useful information is found in the 7 least significant bits (bits 7-31 are reserved). And in fact, as you can see from the code, all read accesses are 8-bit, as well as some writes. Let's make sure all writes are 8-bit. Moreover, in contexts where consecutive reads / writes after the busy check must take place within 15 us, it is better not to waste time on useless accesses. Signed-off-by: Dario Binacchi <dariobin@xxxxxxxxx> --- drivers/rtc/rtc-omap.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/drivers/rtc/rtc-omap.c b/drivers/rtc/rtc-omap.c index dc7db2477f88..d46e0f0cc502 100644 --- a/drivers/rtc/rtc-omap.c +++ b/drivers/rtc/rtc-omap.c @@ -786,8 +786,7 @@ static int omap_rtc_probe(struct platform_device *pdev) /* enable RTC functional clock */ if (rtc->type->has_32kclk_en) { reg = rtc_read(rtc, OMAP_RTC_OSC_REG); - rtc_writel(rtc, OMAP_RTC_OSC_REG, - reg | OMAP_RTC_OSC_32KCLK_EN); + rtc_write(rtc, OMAP_RTC_OSC_REG, reg | OMAP_RTC_OSC_32KCLK_EN); } /* clear old status */ @@ -845,7 +844,7 @@ static int omap_rtc_probe(struct platform_device *pdev) reg = rtc_read(rtc, OMAP_RTC_OSC_REG); reg &= ~OMAP_RTC_OSC_OSC32K_GZ_DISABLE; reg |= OMAP_RTC_OSC_32KCLK_EN | OMAP_RTC_OSC_SEL_32KCLK_SRC; - rtc_writel(rtc, OMAP_RTC_OSC_REG, reg); + rtc_write(rtc, OMAP_RTC_OSC_REG, reg); } rtc->type->lock(rtc); -- 2.17.1