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Date:   Thu, 17 Jan 2019 09:49:36 +0800
From:   Yangbo Lu <yangbo.lu@....com>
To:     netdev@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org
Cc:     "David S . Miller" <davem@...emloft.net>,
        Richard Cochran <richardcochran@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Shawn Guo <shawnguo@...nel.org>, Yangbo Lu <yangbo.lu@....com>
Subject: [v2, 5/5] ptp_qoriq: add fiper pulse loopback support

This patch is to add Kconfig options to support fiper
pulse loopback mode. This is very useful for validating
hardware and driver without external hardware.

Signed-off-by: Yangbo Lu <yangbo.lu@....com>
---
Changes for v2:
	- None.
---
 drivers/ptp/Kconfig     |   18 ++++++++++++++++++
 drivers/ptp/ptp_qoriq.c |    7 ++++++-
 2 files changed, 24 insertions(+), 1 deletions(-)

diff --git a/drivers/ptp/Kconfig b/drivers/ptp/Kconfig
index d137c48..561d797 100644
--- a/drivers/ptp/Kconfig
+++ b/drivers/ptp/Kconfig
@@ -55,6 +55,24 @@ config PTP_1588_CLOCK_QORIQ
 	  To compile this driver as a module, choose M here: the module
 	  will be called ptp_qoriq.
 
+config PTP_1588_CLOCK_QORIQ_FIPER1_LOOPBACK
+	bool "Fiper1 pulse loopback"
+	depends on PTP_1588_CLOCK_QORIQ
+	default n
+	help
+	  Enable fiper1 pulse loopback mode. If choose y, fiper1 pulse is
+	  looped back into trigger1 input. In default, trigger1 input is
+	  based upon normal external trigger input.
+
+config PTP_1588_CLOCK_QORIQ_FIPER2_LOOPBACK
+	bool "Fiper2 pulse loopback"
+	depends on PTP_1588_CLOCK_QORIQ
+	default n
+	help
+	  Enable fiper2 pulse loopback mode. If choose y, fiper2 pulse is
+	  looped back into trigger2 input. In default, trigger2 input is
+	  based upon normal external trigger input.
+
 config PTP_1588_CLOCK_IXP46X
 	tristate "Intel IXP46x as PTP clock"
 	depends on IXP4XX_ETH
diff --git a/drivers/ptp/ptp_qoriq.c b/drivers/ptp/ptp_qoriq.c
index a2e7702..5294475 100644
--- a/drivers/ptp/ptp_qoriq.c
+++ b/drivers/ptp/ptp_qoriq.c
@@ -551,7 +551,12 @@ static int qoriq_ptp_probe(struct platform_device *dev)
 	tmr_ctrl =
 	  (qoriq_ptp->tclk_period & TCLK_PERIOD_MASK) << TCLK_PERIOD_SHIFT |
 	  (qoriq_ptp->cksel & CKSEL_MASK) << CKSEL_SHIFT;
-
+#ifdef CONFIG_PTP_1588_CLOCK_QORIQ_FIPER1_LOOPBACK
+	tmr_ctrl |= PP1L;
+#endif
+#ifdef CONFIG_PTP_1588_CLOCK_QORIQ_FIPER2_LOOPBACK
+	tmr_ctrl |= PP2L;
+#endif
 	spin_lock_irqsave(&qoriq_ptp->lock, flags);
 
 	regs = &qoriq_ptp->regs;
-- 
1.7.1

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