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| author |   Jonathan Lemon <jonathan.lemon@gmail.com> | 2021-09-14 19:16:27 -0700 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2021-09-15 11:10:01 +0100 |
| commit | d14ee2525d3899332c0922d435bddb703f8b7e22 (patch) | |
| tree | f93159995f0a437997107cfa0c050906a0089ec1 /drivers/ptp | |
| parent | ptp: ocp: Add IRIG-B and DCF blocks (diff) | |
| download | linux-dev-d14ee2525d3899332c0922d435bddb703f8b7e22.tar.xz linux-dev-d14ee2525d3899332c0922d435bddb703f8b7e22.zip | |
ptp: ocp: Add IRIG-B output mode control
IRIG-B has several different output formats, the timecard defaults
to using B007. Add a control which selects different output modes.
Signed-off-by: Jonathan Lemon <jonathan.lemon@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/ptp')
| -rw-r--r-- | drivers/ptp/ptp_ocp.c | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/drivers/ptp/ptp_ocp.c b/drivers/ptp/ptp_ocp.c index 1a210b77744c..2b3d4282d77a 100644 --- a/drivers/ptp/ptp_ocp.c +++ b/drivers/ptp/ptp_ocp.c @@ -1677,6 +1677,46 @@ gnss_sync_show(struct device *dev, struct device_attribute *attr, char *buf) static DEVICE_ATTR_RO(gnss_sync); static ssize_t +irig_b_mode_show(struct device *dev, struct device_attribute *attr, char *buf) +{ + struct ptp_ocp *bp = dev_get_drvdata(dev); + u32 val; + + val = ioread32(&bp->irig_out->ctrl); + val = (val >> 16) & 0x07; + return sysfs_emit(buf, "%d\n", val); +} + +static ssize_t +irig_b_mode_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct ptp_ocp *bp = dev_get_drvdata(dev); + unsigned long flags; + int err; + u32 reg; + u8 val; + + err = kstrtou8(buf, 0, &val); + if (err) + return err; + if (val > 7) + return -EINVAL; + + reg = ((val & 0x7) << 16); + + spin_lock_irqsave(&bp->lock, flags); + iowrite32(0, &bp->irig_out->ctrl); /* disable */ + iowrite32(reg, &bp->irig_out->ctrl); /* change mode */ + iowrite32(reg | IRIG_M_CTRL_ENABLE, &bp->irig_out->ctrl); + spin_unlock_irqrestore(&bp->lock, flags); + + return count; +} +static DEVICE_ATTR_RW(irig_b_mode); + +static ssize_t clock_source_show(struct device *dev, struct device_attribute *attr, char *buf) { struct ptp_ocp *bp = dev_get_drvdata(dev); @@ -1728,6 +1768,7 @@ static struct attribute *timecard_attrs[] = { &dev_attr_sma4.attr, &dev_attr_available_sma_inputs.attr, &dev_attr_available_sma_outputs.attr, + &dev_attr_irig_b_mode.attr, NULL, }; ATTRIBUTE_GROUPS(timecard); |