Update Linux to v5.4.2
Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/include/linux/ptp_clock_kernel.h b/include/linux/ptp_clock_kernel.h
index 51349d1..93cc4f1 100644
--- a/include/linux/ptp_clock_kernel.h
+++ b/include/linux/ptp_clock_kernel.h
@@ -1,21 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* PTP 1588 clock support
*
* Copyright (C) 2010 OMICRON electronics GmbH
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef _PTP_CLOCK_KERNEL_H_
@@ -39,6 +26,15 @@
};
struct system_device_crosststamp;
+
+/**
+ * struct ptp_system_timestamp - system time corresponding to a PHC timestamp
+ */
+struct ptp_system_timestamp {
+ struct timespec64 pre_ts;
+ struct timespec64 post_ts;
+};
+
/**
* struct ptp_clock_info - decribes a PTP hardware clock
*
@@ -73,8 +69,18 @@
* parameter delta: Desired change in nanoseconds.
*
* @gettime64: Reads the current time from the hardware clock.
+ * This method is deprecated. New drivers should implement
+ * the @gettimex64 method instead.
* parameter ts: Holds the result.
*
+ * @gettimex64: Reads the current time from the hardware clock and optionally
+ * also the system clock.
+ * parameter ts: Holds the PHC timestamp.
+ * parameter sts: If not NULL, it holds a pair of timestamps from
+ * the system clock. The first reading is made right before
+ * reading the lowest bits of the PHC timestamp and the second
+ * reading immediately follows that.
+ *
* @getcrosststamp: Reads the current time from the hardware clock and
* system clock simultaneously.
* parameter cts: Contains timestamp (device,system) pair,
@@ -124,6 +130,8 @@
int (*adjfreq)(struct ptp_clock_info *ptp, s32 delta);
int (*adjtime)(struct ptp_clock_info *ptp, s64 delta);
int (*gettime64)(struct ptp_clock_info *ptp, struct timespec64 *ts);
+ int (*gettimex64)(struct ptp_clock_info *ptp, struct timespec64 *ts,
+ struct ptp_system_timestamp *sts);
int (*getcrosststamp)(struct ptp_clock_info *ptp,
struct system_device_crosststamp *cts);
int (*settime64)(struct ptp_clock_info *p, const struct timespec64 *ts);
@@ -205,6 +213,14 @@
extern int ptp_clock_index(struct ptp_clock *ptp);
/**
+ * scaled_ppm_to_ppb() - convert scaled ppm to ppb
+ *
+ * @ppm: Parts per million, but with a 16 bit binary fractional field
+ */
+
+extern s32 scaled_ppm_to_ppb(long ppm);
+
+/**
* ptp_find_pin() - obtain the pin index of a given auxiliary function
*
* @ptp: The clock obtained from ptp_clock_register().
@@ -247,4 +263,16 @@
#endif
+static inline void ptp_read_system_prets(struct ptp_system_timestamp *sts)
+{
+ if (sts)
+ ktime_get_real_ts64(&sts->pre_ts);
+}
+
+static inline void ptp_read_system_postts(struct ptp_system_timestamp *sts)
+{
+ if (sts)
+ ktime_get_real_ts64(&sts->post_ts);
+}
+
#endif