[rtc-linux] [PATCH 12/13] RTC: ds1307: Report oscillator problems more intelligently
From: Andrey Smirnov <hidden>
Date: 2016-06-15 06:00:56
Also in:
lkml
Subsystem:
real time clock (rtc) subsystem, the rest · Maintainers:
Alexandre Belloni, Linus Torvalds
Report oscillator problems more intelligently, by printing more information about what cause the issue and not yelling "SET TIME!" at the user. Signed-off-by: Andrey Smirnov <redacted> --- drivers/rtc/rtc-ds1307.c | 28 +++++++++++++++++++++++----- 1 file changed, 23 insertions(+), 5 deletions(-)
diff --git a/drivers/rtc/rtc-ds1307.c b/drivers/rtc/rtc-ds1307.c
index 76e66a3..d9693bd 100644
--- a/drivers/rtc/rtc-ds1307.c
+++ b/drivers/rtc/rtc-ds1307.c@@ -1424,6 +1424,19 @@ static int ds1307_chip_configure(const struct ds1307 *ds1307) return 0; } +static void ds1307_report_clock_halt(const struct ds1307 *ds1307) +{ + dev_warn(&ds1307->client->dev, "RTC's oscillator is turned off. " + "Turning it on. Please set time"); +} + +static void ds1307_report_oscillator_fault(const struct ds1307 *ds1307) +{ + dev_warn(&ds1307->client->dev, "RTC's reported oscillator fault. " + "Clearing the fault flag and re-reading RTC status. " + "Please set time"); +} + static int ds1307_chip_sanity_check(const struct ds1307 *ds1307) { int tmp, retries;
@@ -1453,7 +1466,7 @@ static int ds1307_chip_sanity_check(const struct ds1307 *ds1307) if (tmp & DS1307_BIT_CH) { i2c_smbus_write_byte_data(client, DS1307_REG_SECS, 0); - dev_warn(&client->dev, "SET TIME!\n"); + ds1307_report_clock_halt(ds1307); continue; } break;
@@ -1469,15 +1482,17 @@ static int ds1307_chip_sanity_check(const struct ds1307 *ds1307) DS1307_REG_CONTROL, regs[DS1307_REG_CONTROL] & ~DS1338_BIT_OSF); - dev_warn(&client->dev, "SET TIME!\n"); + ds1307_report_oscillator_fault(ds1307); continue; } break; case ds_1340: /* clock halted? turn it on, so clock can tick. */ - if (tmp & DS1340_BIT_nEOSC) + if (tmp & DS1340_BIT_nEOSC) { i2c_smbus_write_byte_data(client, DS1307_REG_SECS, 0); + ds1307_report_clock_halt(ds1307); + } tmp = i2c_smbus_read_byte_data(client, DS1340_REG_FLAG); if (tmp < 0) {
@@ -1489,7 +1504,7 @@ static int ds1307_chip_sanity_check(const struct ds1307 *ds1307) if (tmp & DS1340_BIT_OSF) { i2c_smbus_write_byte_data(client, DS1340_REG_FLAG, 0); - dev_warn(&client->dev, "SET TIME!\n"); + ds1307_report_oscillator_fault(ds1307); } return 0;
@@ -1500,6 +1515,9 @@ static int ds1307_chip_sanity_check(const struct ds1307 *ds1307) DS1307_REG_WDAY, regs[DS1307_REG_WDAY] | MCP794XX_BIT_VBATEN); + dev_warn(&client->dev, + "battery backup was disabled. " + "Re-enabling it\n"); } /* clock halted? turn it on, so clock can tick. */
@@ -1507,7 +1525,7 @@ static int ds1307_chip_sanity_check(const struct ds1307 *ds1307) i2c_smbus_write_byte_data(client, DS1307_REG_SECS, MCP794XX_BIT_ST); - dev_warn(&client->dev, "SET TIME!\n"); + ds1307_report_clock_halt(ds1307); continue; }
--
2.5.5
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