netdev - [PATCH net-next 1/3] ptp: Allow reassigning calibration pin function

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Message-Id: <1403699851-11178-2-git-send-email-stefan.sorensen@spectralink.com>
Date:	Wed, 25 Jun 2014 14:37:29 +0200
From:	Stefan Sørensen 
	<stefan.sorensen@...ctralink.com>
To:	davem@...emloft.net, richardcochran@...il.com
Cc:	netdev@...r.kernel.org,
	Stefan Sørensen 
	<stefan.sorensen@...ctralink.com>
Subject: [PATCH net-next 1/3] ptp: Allow reassigning calibration pin function

The ptp pin function programming does not allow calibration pin to change
function. This is problematic on hardware that uses the default calibration
pin for other purposes.

Removing this limitation does not impact calibration if userspace does not
reprogram the calibration pin.

Signed-off-by: Stefan Sørensen <stefan.sorensen@...ctralink.com>
---
 drivers/net/phy/dp83640.c | 6 +++++-
 drivers/ptp/ptp_chardev.c | 9 ++-------
 2 files changed, 7 insertions(+), 8 deletions(-)

diff --git a/drivers/net/phy/dp83640.c b/drivers/net/phy/dp83640.c
index 6a999e6..73fada9 100644
--- a/drivers/net/phy/dp83640.c
+++ b/drivers/net/phy/dp83640.c
@@ -594,7 +594,11 @@ static void recalibrate(struct dp83640_clock *clock)
 	u16 cal_gpio, cfg0, evnt, ptp_trig, trigger, val;
 
 	trigger = CAL_TRIGGER;
-	cal_gpio = gpio_tab[CALIBRATE_GPIO];
+	cal_gpio = 1 + ptp_find_pin(clock->ptp_clock, PTP_PF_PHYSYNC, 0);
+	if (cal_gpio < 1) {
+		pr_err("PHY calibration pin not avaible - PHY is not calibrated.");
+		return;
+	}
 
 	mutex_lock(&clock->extreg_lock);
 
diff --git a/drivers/ptp/ptp_chardev.c b/drivers/ptp/ptp_chardev.c
index 419056d..f8a7609 100644
--- a/drivers/ptp/ptp_chardev.c
+++ b/drivers/ptp/ptp_chardev.c
@@ -86,17 +86,12 @@ int ptp_set_pinfunc(struct ptp_clock *ptp, unsigned int pin,
 			return -EINVAL;
 		break;
 	case PTP_PF_PHYSYNC:
-		pr_err("sorry, cannot reassign the calibration pin\n");
-		return -EINVAL;
+		if (chan != 0)
+			return -EINVAL;
 	default:
 		return -EINVAL;
 	}
 
-	if (pin2->func == PTP_PF_PHYSYNC) {
-		pr_err("sorry, cannot reprogram the calibration pin\n");
-		return -EINVAL;
-	}
-
 	if (info->verify(info, pin, func, chan)) {
 		pr_err("driver cannot use function %u on pin %u\n", func, chan);
 		return -EOPNOTSUPP;
-- 
1.9.3

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