On 21/04/2016 at 20:24:18 +0200, Mylène Josserand wrote : > The RTC RV3029 handles different types of alarms : seconds, minutes, ... > These alarms can be enabled or disabled individually using an AE_x bit > which is the last bit (BIT(7)) on each alarm registers. > > To prepare the alarm IRQ support, the current code enables all the alarm > types by setting each AE_x to 1. > It also fixes month and weekday errors : it was performing -1 instead > of +1. > > Signed-off-by: Mylène Josserand <mylene.josser...@free-electrons.com> > --- > drivers/rtc/rtc-rv3029c2.c | 23 ++++++++++++++++------- > 1 file changed, 16 insertions(+), 7 deletions(-) > > diff --git a/drivers/rtc/rtc-rv3029c2.c b/drivers/rtc/rtc-rv3029c2.c > index a849005..42de1a3 100644 > --- a/drivers/rtc/rtc-rv3029c2.c > +++ b/drivers/rtc/rtc-rv3029c2.c > @@ -76,6 +76,7 @@ > #define RV3029_A_DW 0x14 > #define RV3029_A_MO 0x15 > #define RV3029_A_YR 0x16 > +#define RV3029_A_AE_X BIT(7) > #define RV3029_ALARM_SECTION_LEN 0x07 > > /* timer section */ > @@ -436,14 +437,22 @@ static int rv3029_set_alarm(struct device *dev, struct > rtc_wkalrm *alarm) > dev_err(dev, "%s: reading SR failed\n", __func__); > return -EIO; > } > - regs[RV3029_A_SC - RV3029_A_SC] = bin2bcd(tm->tm_sec & 0x7f); > - regs[RV3029_A_MN - RV3029_A_SC] = bin2bcd(tm->tm_min & 0x7f); > - regs[RV3029_A_HR - RV3029_A_SC] = bin2bcd(tm->tm_hour & 0x3f); > - regs[RV3029_A_DT - RV3029_A_SC] = bin2bcd(tm->tm_mday & 0x3f); > - regs[RV3029_A_MO - RV3029_A_SC] = bin2bcd((tm->tm_mon & 0x1f) - 1); > - regs[RV3029_A_DW - RV3029_A_SC] = bin2bcd((tm->tm_wday & 7) - 1); > - regs[RV3029_A_YR - RV3029_A_SC] = bin2bcd((tm->tm_year & 0x7f) - 100); > > + /* Activate all the alarms with AE_x bit */ > + regs[RV3029_A_SC - RV3029_A_SC] = (bin2bcd(tm->tm_sec)) | RV3029_A_AE_X; > + regs[RV3029_A_MN - RV3029_A_SC] = (bin2bcd(tm->tm_min)) | RV3029_A_AE_X; > + regs[RV3029_A_HR - RV3029_A_SC] = (bin2bcd(tm->tm_hour & 0x3f)) > + | RV3029_A_AE_X; > + regs[RV3029_A_DT - RV3029_A_SC] = (bin2bcd(tm->tm_mday & 0x3f)) > + | RV3029_A_AE_X; > + regs[RV3029_A_MO - RV3029_A_SC] = (bin2bcd((tm->tm_mon & 0x1f) + 1)) > + | RV3029_A_AE_X; > + regs[RV3029_A_DW - RV3029_A_SC] = (bin2bcd((tm->tm_wday & 7) + 1)) > + | RV3029_A_AE_X; > + regs[RV3029_A_YR - RV3029_A_SC] = (bin2bcd((tm->tm_year) - 100)) > + | RV3029_A_AE_X; > +
Alarms probably never worked anyway because this still suffers form another bug: (bin2bcd(tm->tm_hour & 0x3f)) should be (bin2bcd(tm->tm_hour) & 0x3f), and the same for the other members. note that (bin2bcd((tm->tm_mon & 0x1f) + 1)) must be (bin2bcd(tm->tm_mon + 1) & 0x1f) etc... > + /* Write the alarm */ > ret = rv3029_write_regs(dev, RV3029_A_SC, regs, > RV3029_ALARM_SECTION_LEN); > if (ret < 0) > -- > 2.8.0.rc3 > -- Alexandre Belloni, Free Electrons Embedded Linux, Kernel and Android engineering http://free-electrons.com
