diff options
| author | Werner Zeh <werner.zeh@siemens.com> | 2016-12-13 08:03:10 +0100 |
|---|---|---|
| committer | Martin Roth <martinroth@google.com> | 2016-12-15 04:11:06 +0100 |
| commit | f1f322b1a883e3d50a1907e29b5aa333a0f795a8 (patch) | |
| tree | 2956a9fc585c93f0e1d7cda88550d1a1bd3c790f /src/drivers/i2c | |
| parent | 6bc44169680816e137ad9450f404c8463e7eb9d9 (diff) | |
| download | coreboot-f1f322b1a883e3d50a1907e29b5aa333a0f795a8.tar.xz | |
pcf8523: Fix wrong initialization of several registers
In the case where the RTC is initialized after the battery is
completely drained the bits for power_mode and cof_selection are set up
with wrongly applied masks.
In the case where the RTC is re-initialized again with no power-loss
after the last initialization the bits for cap_sel, power_mode and
cof_selection are not shifted to the right position.
Both errors lead to a wrong initialization of the RTC and in turn to a
way larger current consumption (instead of 120 nA the RTC current rises
to over 2 µA).
This patch fixes both errors and the current consumption is in the right
range again.
TEST=booted mc_bdx1 and verified current consumption of RTC
Change-Id: I8594f6ac121a175844393952db2169dbc5cbd2b2
Signed-off-by: Werner Zeh <werner.zeh@siemens.com>
Reviewed-on: https://review.coreboot.org/17829
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Martin Roth <martinroth@google.com>
Diffstat (limited to 'src/drivers/i2c')
| -rw-r--r-- | src/drivers/i2c/pcf8523/pcf8523.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/src/drivers/i2c/pcf8523/pcf8523.c b/src/drivers/i2c/pcf8523/pcf8523.c index eb0bf25123..416499bce5 100644 --- a/src/drivers/i2c/pcf8523/pcf8523.c +++ b/src/drivers/i2c/pcf8523/pcf8523.c @@ -63,15 +63,15 @@ static void pcf8523_init(struct device *dev) * corrupted and OS bit was not set. */ reg = smbus_read_byte(dev, CTRL_REG_1); reg &= ~(STOP_BIT | CAP_SEL); - reg |= config->cap_sel; + reg |= ((!!config->cap_sel) << 7); smbus_write_byte(dev, CTRL_REG_1, reg); reg = smbus_read_byte(dev, CTRL_REG_3); reg &= ~PM_MASK; - reg |= config->power_mode; + reg |= ((config->power_mode & 0x07) << 5); smbus_write_byte(dev, CTRL_REG_3, reg); reg = smbus_read_byte(dev, TMR_CLKOUT_REG); reg &= ~COF_MASK; - reg |= config->cof_selection; + reg |= ((config->cof_selection & 0x07) << 3); smbus_write_byte(dev, TMR_CLKOUT_REG, reg); return; } @@ -87,7 +87,7 @@ static void pcf8523_init(struct device *dev) ((!!config->tmrA_int_en) << 1) | (!!config->tmrB_int_en)); - smbus_write_byte(dev, CTRL_REG_3, ((config->power_mode & 0x03) << 5) | + smbus_write_byte(dev, CTRL_REG_3, ((config->power_mode & 0x07) << 5) | ((!!config->bat_switch_int_en) << 1) | (!!config->bat_low_int_en)); @@ -96,7 +96,7 @@ static void pcf8523_init(struct device *dev) smbus_write_byte(dev, TMR_CLKOUT_REG, ((!!config->tmrA_int_mode) << 7) | ((!!config->tmrB_int_mode) << 6) | - ((config->cof_selection & 0x38) << 3) | + ((config->cof_selection & 0x07) << 3) | ((config->tmrA_mode & 0x03) << 1) | (!!config->tmrB_mode)); |