From d14ee2525d3899332c0922d435bddb703f8b7e22 Mon Sep 17 00:00:00 2001 From: Jonathan Lemon Date: Tue, 14 Sep 2021 19:16:27 -0700 Subject: [PATCH] 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 Signed-off-by: David S. Miller --- drivers/ptp/ptp_ocp.c | 41 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 41 insertions(+) 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 @@ -1676,6 +1676,46 @@ 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) { @@ -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); -- 2.39.5