[net-next, v2, 4/7] ptp_qoriq: export ptp clock reading function for cyclecounter
From: Yangbo Lu <yangbo.lu@nxp.com>
Date: 2021-05-21 04:27:23
Subsystem:
freescale qoriq ptp clock driver, freescale soc drivers, networking drivers, ptp hardware clock support, the rest · Maintainers:
Yangbo Lu, Christophe Leroy, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Richard Cochran, Linus Torvalds
Export ptp clock reading function for cyclecounter to read cycles. Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com> --- Changes for v2: - Updated copyright. --- drivers/ptp/ptp_qoriq.c | 16 ++++++++++++++++ include/linux/fsl/ptp_qoriq.h | 3 ++- 2 files changed, 18 insertions(+), 1 deletion(-)
diff --git a/drivers/ptp/ptp_qoriq.c b/drivers/ptp/ptp_qoriq.c
index 08f4cf0ad9e3..2bcbe9da2a29 100644
--- a/drivers/ptp/ptp_qoriq.c
+++ b/drivers/ptp/ptp_qoriq.c@@ -3,6 +3,7 @@ * PTP 1588 clock for Freescale QorIQ 1588 timer * * Copyright (C) 2010 OMICRON electronics GmbH + * Copyright 2021 NXP */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
@@ -311,6 +312,21 @@ int ptp_qoriq_enable(struct ptp_clock_info *ptp, } EXPORT_SYMBOL_GPL(ptp_qoriq_enable); +u64 ptp_qoriq_clock_read(const struct cyclecounter *cc) +{ + struct ptp_clock_info *ptp = ptp_get_pclock_info(cc); + struct ptp_qoriq *ptp_qoriq = container_of(ptp, struct ptp_qoriq, caps); + unsigned long flags; + u64 ns; + + spin_lock_irqsave(&ptp_qoriq->lock, flags); + ns = tmr_cnt_read(ptp_qoriq); + spin_unlock_irqrestore(&ptp_qoriq->lock, flags); + + return ns; +} +EXPORT_SYMBOL_GPL(ptp_qoriq_clock_read); + static const struct ptp_clock_info ptp_qoriq_caps = { .owner = THIS_MODULE, .name = "qoriq ptp clock",
diff --git a/include/linux/fsl/ptp_qoriq.h b/include/linux/fsl/ptp_qoriq.h
index 01acebe37fab..4590e70f1afb 100644
--- a/include/linux/fsl/ptp_qoriq.h
+++ b/include/linux/fsl/ptp_qoriq.h@@ -1,7 +1,7 @@ // SPDX-License-Identifier: GPL-2.0 /* * Copyright (C) 2010 OMICRON electronics GmbH - * Copyright 2018 NXP + * Copyright 2018-2021 NXP */ #ifndef __PTP_QORIQ_H__ #define __PTP_QORIQ_H__
@@ -193,6 +193,7 @@ int ptp_qoriq_settime(struct ptp_clock_info *ptp, const struct timespec64 *ts); int ptp_qoriq_enable(struct ptp_clock_info *ptp, struct ptp_clock_request *rq, int on); +u64 ptp_qoriq_clock_read(const struct cyclecounter *cc); int extts_clean_up(struct ptp_qoriq *ptp_qoriq, int index, bool update_event); #ifdef CONFIG_DEBUG_FS void ptp_qoriq_create_debugfs(struct ptp_qoriq *ptp_qoriq);
--
2.25.1