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rtc: imxdi: when locked, do not fail silently 

If the DryICE unit is locked it is impossible to set the time. Provide an
error message for this case.

Signed-off-by: Juergen Borleis <jbe@pengutronix.de>
Signed-off-by: Robert Schwebel <rsc@pengutronix.de>
[rsc: got NDA clearance from Freescale]
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
This commit is contained in:
Juergen Borleis 2015-04-27 15:59:51 +02:00 committed by Alexandre Belloni
parent a7c535e3a8
commit 9bb698c60a
1 changed files with 24 additions and 3 deletions
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27
drivers/rtc/rtc-imxdi.c
View File

@ -566,14 +566,35 @@ static int dryice_rtc_read_time(struct device *dev, struct rtc_time *tm)
static int dryice_rtc_set_mmss(struct device *dev, unsigned long secs) static int dryice_rtc_set_mmss(struct device *dev, unsigned long secs)
{ {
struct imxdi_dev *imxdi = dev_get_drvdata(dev); struct imxdi_dev *imxdi = dev_get_drvdata(dev);
u32 dcr, dsr;
int rc; int rc;
dcr = readl(imxdi->ioaddr + DCR);
dsr = readl(imxdi->ioaddr + DSR);
if (!(dcr & DCR_TCE) || (dsr & DSR_SVF)) {
if (dcr & DCR_TCHL) {
/* we are even more out of luck */
di_what_is_to_be_done(imxdi, "battery");
return -EPERM;
}
if ((dcr & DCR_TCSL) || (dsr & DSR_SVF)) {
/* we are out of luck for now */
di_what_is_to_be_done(imxdi, "main");
return -EPERM;
}
}
/* zero the fractional part first */ /* zero the fractional part first */
rc = di_write_wait(imxdi, 0, DTCLR); rc = di_write_wait(imxdi, 0, DTCLR);
if (rc == 0) if (rc != 0)
rc = di_write_wait(imxdi, secs, DTCMR);
return rc; return rc;
rc = di_write_wait(imxdi, secs, DTCMR);
if (rc != 0)
return rc;
return di_write_wait(imxdi, readl(imxdi->ioaddr + DCR) | DCR_TCE, DCR);
} }
static int dryice_rtc_alarm_irq_enable(struct device *dev, static int dryice_rtc_alarm_irq_enable(struct device *dev,