From patchwork Mon Nov 28 10:32:16 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Arun Ramadoss X-Patchwork-Id: 13057264 X-Patchwork-Delegate: kuba@kernel.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id A3637C43217 for ; Mon, 28 Nov 2022 10:33:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230280AbiK1KdN (ORCPT ); Mon, 28 Nov 2022 05:33:13 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34596 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230281AbiK1KdK (ORCPT ); Mon, 28 Nov 2022 05:33:10 -0500 Received: from esa.microchip.iphmx.com (esa.microchip.iphmx.com [68.232.153.233]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8A306140C1; Mon, 28 Nov 2022 02:33:05 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=microchip.com; i=@microchip.com; q=dns/txt; s=mchp; t=1669631585; x=1701167585; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=bxT1YzwXwCRi+eKkhv8DSI+QJY1u4wLDwuWXGDFx9Ns=; b=RhCUGrwxaywhHBTKBoykKyvxivi7auTMhwGpWLUaV/UNGHMVvd2XaLYx 4mphuMaL7qh5o+rlyeoLNOF5nMR7He51unS0PoXOsa6YAH4+nB4ztQGx1 tnASPaTHaGhoQ7RKW3SRf+A/WWoHo9eiyY1r0oSvHwAEQoyUR2vbk8dEh i1kJCLQbbBdAuyFsC6Yelud/NL61n55hq+XZjT6fAsXR929z+yGWEsBqg I0477Ml1trNsNZxPE7lP4L6NusKsftPqaXYGDGjeLexPFdL7ysO1Br9+D VtoLV1ZVs9g/fHJaBhrwSVPERuSvJhHQcM45IgyctX+JMbRLpT2ir3Fqe g==; X-IronPort-AV: E=Sophos;i="5.96,200,1665471600"; d="scan'208";a="190770148" Received: from unknown (HELO email.microchip.com) ([170.129.1.10]) by esa5.microchip.iphmx.com with ESMTP/TLS/AES256-SHA256; 28 Nov 2022 03:33:05 -0700 Received: from chn-vm-ex03.mchp-main.com (10.10.85.151) by chn-vm-ex03.mchp-main.com (10.10.85.151) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.12; Mon, 28 Nov 2022 03:33:04 -0700 Received: from CHE-LT-I17769U.microchip.com (10.10.115.15) by chn-vm-ex03.mchp-main.com (10.10.85.151) with Microsoft SMTP Server id 15.1.2507.12 via Frontend Transport; Mon, 28 Nov 2022 03:32:58 -0700 From: Arun Ramadoss To: , CC: , , , , , , , , , , , , , Subject: [Patch net-next v1 01/12] net: dsa: microchip: ptp: add the posix clock support Date: Mon, 28 Nov 2022 16:02:16 +0530 Message-ID: <20221128103227.23171-2-arun.ramadoss@microchip.com> X-Mailer: git-send-email 2.36.1 In-Reply-To: <20221128103227.23171-1-arun.ramadoss@microchip.com> References: <20221128103227.23171-1-arun.ramadoss@microchip.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org From: Christian Eggers This patch implement routines (adjfine, adjtime, gettime and settime) for manipulating the chip's PTP clock. It registers the ptp caps to posix clock register. Signed-off-by: Christian Eggers Co-developed-by: Arun Ramadoss Signed-off-by: Arun Ramadoss --- RFC v2 -> Patch v1 - Repharsed the Kconfig help text - Removed IS_ERR_OR_NULL check in ptp_clock_unregister - Add the check for ptp_data->clock in ksz_ptp_ts_info - Renamed MAX_DRIFT_CORR to KSZ_MAX_DRIFT_CORR - Removed the comments - Variables declaration in reverse christmas tree - Added the ptp_clock_optional --- drivers/net/dsa/microchip/Kconfig | 11 + drivers/net/dsa/microchip/Makefile | 5 + drivers/net/dsa/microchip/ksz_common.c | 14 +- drivers/net/dsa/microchip/ksz_common.h | 16 ++ drivers/net/dsa/microchip/ksz_ptp.c | 265 ++++++++++++++++++++++++ drivers/net/dsa/microchip/ksz_ptp.h | 45 ++++ drivers/net/dsa/microchip/ksz_ptp_reg.h | 57 +++++ 7 files changed, 412 insertions(+), 1 deletion(-) create mode 100644 drivers/net/dsa/microchip/ksz_ptp.c create mode 100644 drivers/net/dsa/microchip/ksz_ptp.h create mode 100644 drivers/net/dsa/microchip/ksz_ptp_reg.h diff --git a/drivers/net/dsa/microchip/Kconfig b/drivers/net/dsa/microchip/Kconfig index 913f83ef013c..0546c573668a 100644 --- a/drivers/net/dsa/microchip/Kconfig +++ b/drivers/net/dsa/microchip/Kconfig @@ -11,6 +11,7 @@ menuconfig NET_DSA_MICROCHIP_KSZ_COMMON config NET_DSA_MICROCHIP_KSZ9477_I2C tristate "KSZ series I2C connected switch driver" depends on NET_DSA_MICROCHIP_KSZ_COMMON && I2C + depends on PTP_1588_CLOCK_OPTIONAL select REGMAP_I2C help Select to enable support for registering switches configured through I2C. @@ -18,10 +19,20 @@ config NET_DSA_MICROCHIP_KSZ9477_I2C config NET_DSA_MICROCHIP_KSZ_SPI tristate "KSZ series SPI connected switch driver" depends on NET_DSA_MICROCHIP_KSZ_COMMON && SPI + depends on PTP_1588_CLOCK_OPTIONAL select REGMAP_SPI help Select to enable support for registering switches configured through SPI. +config NET_DSA_MICROCHIP_KSZ_PTP + bool "Support for the PTP clock on the KSZ9563/LAN937x Ethernet Switch" + depends on NET_DSA_MICROCHIP_KSZ_COMMON && PTP_1588_CLOCK + help + Select to enable support for timestamping & PTP clock manipulation in + KSZ8563/KSZ9563/LAN937x series of switches. KSZ9563/KSZ8563 supports + only one step timestamping. LAN937x switch supports both one step and + two step timestamping. + config NET_DSA_MICROCHIP_KSZ8863_SMI tristate "KSZ series SMI connected switch driver" depends on NET_DSA_MICROCHIP_KSZ_COMMON diff --git a/drivers/net/dsa/microchip/Makefile b/drivers/net/dsa/microchip/Makefile index 28873559efc2..48360cc9fc68 100644 --- a/drivers/net/dsa/microchip/Makefile +++ b/drivers/net/dsa/microchip/Makefile @@ -4,6 +4,11 @@ ksz_switch-objs := ksz_common.o ksz_switch-objs += ksz9477.o ksz_switch-objs += ksz8795.o ksz_switch-objs += lan937x_main.o + +ifdef CONFIG_NET_DSA_MICROCHIP_KSZ_PTP +ksz_switch-objs += ksz_ptp.o +endif + obj-$(CONFIG_NET_DSA_MICROCHIP_KSZ9477_I2C) += ksz9477_i2c.o obj-$(CONFIG_NET_DSA_MICROCHIP_KSZ_SPI) += ksz_spi.o obj-$(CONFIG_NET_DSA_MICROCHIP_KSZ8863_SMI) += ksz8863_smi.o diff --git a/drivers/net/dsa/microchip/ksz_common.c b/drivers/net/dsa/microchip/ksz_common.c index 8c8db315317d..2d09cd141db6 100644 --- a/drivers/net/dsa/microchip/ksz_common.c +++ b/drivers/net/dsa/microchip/ksz_common.c @@ -24,6 +24,7 @@ #include #include "ksz_common.h" +#include "ksz_ptp.h" #include "ksz8.h" #include "ksz9477.h" #include "lan937x.h" @@ -2016,10 +2017,16 @@ static int ksz_setup(struct dsa_switch *ds) } } + ret = ksz_ptp_clock_register(ds); + if (ret) { + dev_err(dev->dev, "Failed to register PTP clock: %d\n", ret); + goto out_pirq; + } + ret = ksz_mdio_register(dev); if (ret < 0) { dev_err(dev->dev, "failed to register the mdio"); - goto out_pirq; + goto out_ptp_clock_unregister; } /* start switch */ @@ -2028,6 +2035,8 @@ static int ksz_setup(struct dsa_switch *ds) return 0; +out_ptp_clock_unregister: + ksz_ptp_clock_unregister(ds); out_pirq: if (dev->irq > 0) dsa_switch_for_each_user_port(dp, dev->ds) @@ -2044,6 +2053,8 @@ static void ksz_teardown(struct dsa_switch *ds) struct ksz_device *dev = ds->priv; struct dsa_port *dp; + ksz_ptp_clock_unregister(ds); + if (dev->irq > 0) { dsa_switch_for_each_user_port(dp, dev->ds) ksz_irq_free(&dev->ports[dp->index].pirq); @@ -2861,6 +2872,7 @@ static const struct dsa_switch_ops ksz_switch_ops = { .get_pause_stats = ksz_get_pause_stats, .port_change_mtu = ksz_change_mtu, .port_max_mtu = ksz_max_mtu, + .get_ts_info = ksz_get_ts_info, }; struct ksz_device *ksz_switch_alloc(struct device *base, void *priv) diff --git a/drivers/net/dsa/microchip/ksz_common.h b/drivers/net/dsa/microchip/ksz_common.h index c6726cbd5465..5a6bfd42c6f9 100644 --- a/drivers/net/dsa/microchip/ksz_common.h +++ b/drivers/net/dsa/microchip/ksz_common.h @@ -15,6 +15,8 @@ #include #include +#include "ksz_ptp.h" + #define KSZ_MAX_NUM_PORTS 8 struct ksz_device; @@ -141,6 +143,7 @@ struct ksz_device { u16 port_mask; struct mutex lock_irq; /* IRQ Access */ struct ksz_irq girq; + struct ksz_ptp_data ptp_data; }; /* List of supported models */ @@ -444,6 +447,19 @@ static inline int ksz_write32(struct ksz_device *dev, u32 reg, u32 value) return ret; } +static inline int ksz_rmw16(struct ksz_device *dev, u32 reg, u16 mask, + u16 value) +{ + int ret; + + ret = regmap_update_bits(dev->regmap[1], reg, mask, value); + if (ret) + dev_err(dev->dev, "can't rmw 16bit reg: 0x%x %pe\n", reg, + ERR_PTR(ret)); + + return ret; +} + static inline int ksz_write64(struct ksz_device *dev, u32 reg, u64 value) { u32 val[2]; diff --git a/drivers/net/dsa/microchip/ksz_ptp.c b/drivers/net/dsa/microchip/ksz_ptp.c new file mode 100644 index 000000000000..c737635ca266 --- /dev/null +++ b/drivers/net/dsa/microchip/ksz_ptp.c @@ -0,0 +1,265 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Microchip KSZ PTP Implementation + * Copyright (C) 2022 Microchip Technology Inc. + */ + +#include +#include +#include + +#include "ksz_common.h" +#include "ksz_ptp.h" +#include "ksz_ptp_reg.h" + +#define ptp_caps_to_data(d) container_of((d), struct ksz_ptp_data, caps) +#define ptp_data_to_ksz_dev(d) container_of((d), struct ksz_device, ptp_data) + +#define KSZ_MAX_DRIFT_CORR 6250000 + +#define KSZ_PTP_INC_NS 40 /* HW clock is incremented every 40 ns (by 40) */ +#define KSZ_PTP_SUBNS_BITS 32 + +/* The function is return back the capability of timestamping feature when + * requested through ethtool -T utility + */ +int ksz_get_ts_info(struct dsa_switch *ds, int port, struct ethtool_ts_info *ts) +{ + struct ksz_device *dev = ds->priv; + struct ksz_ptp_data *ptp_data; + + ptp_data = &dev->ptp_data; + + if (!ptp_data->clock) + return -ENODEV; + + ts->so_timestamping = SOF_TIMESTAMPING_TX_HARDWARE | + SOF_TIMESTAMPING_RX_HARDWARE | + SOF_TIMESTAMPING_RAW_HARDWARE; + + ts->tx_types = BIT(HWTSTAMP_TX_OFF); + + ts->rx_filters = BIT(HWTSTAMP_FILTER_NONE); + + ts->phc_index = ptp_clock_index(ptp_data->clock); + + return 0; +} + +static int _ksz_ptp_gettime(struct ksz_device *dev, struct timespec64 *ts) +{ + u32 nanoseconds; + u32 seconds; + u8 phase; + int ret; + + /* Copy current PTP clock into shadow registers and read */ + ret = ksz_rmw16(dev, REG_PTP_CLK_CTRL, PTP_READ_TIME, PTP_READ_TIME); + if (ret) + return ret; + + ret = ksz_read8(dev, REG_PTP_RTC_SUB_NANOSEC__2, &phase); + if (ret) + return ret; + + ret = ksz_read32(dev, REG_PTP_RTC_NANOSEC, &nanoseconds); + if (ret) + return ret; + + ret = ksz_read32(dev, REG_PTP_RTC_SEC, &seconds); + if (ret) + return ret; + + ts->tv_sec = seconds; + ts->tv_nsec = nanoseconds + phase * 8; + + return 0; +} + +static int ksz_ptp_gettime(struct ptp_clock_info *ptp, struct timespec64 *ts) +{ + struct ksz_ptp_data *ptp_data = ptp_caps_to_data(ptp); + struct ksz_device *dev = ptp_data_to_ksz_dev(ptp_data); + int ret; + + mutex_lock(&ptp_data->lock); + ret = _ksz_ptp_gettime(dev, ts); + mutex_unlock(&ptp_data->lock); + + return ret; +} + +static int ksz_ptp_settime(struct ptp_clock_info *ptp, + const struct timespec64 *ts) +{ + struct ksz_ptp_data *ptp_data = ptp_caps_to_data(ptp); + struct ksz_device *dev = ptp_data_to_ksz_dev(ptp_data); + int ret; + + mutex_lock(&ptp_data->lock); + + /* Write to shadow registers and Load PTP clock */ + ret = ksz_write16(dev, REG_PTP_RTC_SUB_NANOSEC__2, PTP_RTC_0NS); + if (ret) + goto error_return; + + ret = ksz_write32(dev, REG_PTP_RTC_NANOSEC, ts->tv_nsec); + if (ret) + goto error_return; + + ret = ksz_write32(dev, REG_PTP_RTC_SEC, ts->tv_sec); + if (ret) + goto error_return; + + ret = ksz_rmw16(dev, REG_PTP_CLK_CTRL, PTP_LOAD_TIME, PTP_LOAD_TIME); + +error_return: + mutex_unlock(&ptp_data->lock); + + return ret; +} + +static int ksz_ptp_adjfine(struct ptp_clock_info *ptp, long scaled_ppm) +{ + struct ksz_ptp_data *ptp_data = ptp_caps_to_data(ptp); + struct ksz_device *dev = ptp_data_to_ksz_dev(ptp_data); + int ret; + + mutex_lock(&ptp_data->lock); + + if (scaled_ppm) { + s64 ppb, adj; + u32 data32; + + /* see scaled_ppm_to_ppb() in ptp_clock.c for details */ + ppb = 1 + scaled_ppm; + ppb *= 125; + ppb *= KSZ_PTP_INC_NS; + ppb <<= KSZ_PTP_SUBNS_BITS - 13; + adj = div_s64(ppb, NSEC_PER_SEC); + + data32 = abs(adj); + data32 &= PTP_SUBNANOSEC_M; + if (adj >= 0) + data32 |= PTP_RATE_DIR; + + ret = ksz_write32(dev, REG_PTP_SUBNANOSEC_RATE, data32); + if (ret) + goto error_return; + + ret = ksz_rmw16(dev, REG_PTP_CLK_CTRL, PTP_CLK_ADJ_ENABLE, + PTP_CLK_ADJ_ENABLE); + if (ret) + goto error_return; + } else { + ret = ksz_rmw16(dev, REG_PTP_CLK_CTRL, PTP_CLK_ADJ_ENABLE, 0); + if (ret) + goto error_return; + } + +error_return: + mutex_unlock(&ptp_data->lock); + return ret; +} + +static int ksz_ptp_adjtime(struct ptp_clock_info *ptp, s64 delta) +{ + struct ksz_ptp_data *ptp_data = ptp_caps_to_data(ptp); + struct ksz_device *dev = ptp_data_to_ksz_dev(ptp_data); + s32 sec, nsec; + u16 data16; + int ret; + + mutex_lock(&ptp_data->lock); + + /* do not use ns_to_timespec64(), + * both sec and nsec are subtracted by hw + */ + sec = div_s64_rem(delta, NSEC_PER_SEC, &nsec); + + ret = ksz_write32(dev, REG_PTP_RTC_NANOSEC, abs(nsec)); + if (ret) + goto error_return; + + ret = ksz_write32(dev, REG_PTP_RTC_SEC, abs(sec)); + if (ret) + goto error_return; + + ret = ksz_read16(dev, REG_PTP_CLK_CTRL, &data16); + if (ret) + goto error_return; + + data16 |= PTP_STEP_ADJ; + + /*PTP_STEP_DIR -- 0: subtract, 1: add */ + if (delta < 0) + data16 &= ~PTP_STEP_DIR; + else + data16 |= PTP_STEP_DIR; + + ret = ksz_write16(dev, REG_PTP_CLK_CTRL, data16); + +error_return: + mutex_unlock(&ptp_data->lock); + return ret; +} + +static int ksz_ptp_start_clock(struct ksz_device *dev) +{ + return ksz_rmw16(dev, REG_PTP_CLK_CTRL, PTP_CLK_ENABLE, PTP_CLK_ENABLE); +} + +static const struct ptp_clock_info ksz_ptp_caps = { + .owner = THIS_MODULE, + .name = "Microchip Clock", + .max_adj = KSZ_MAX_DRIFT_CORR, + .gettime64 = ksz_ptp_gettime, + .settime64 = ksz_ptp_settime, + .adjfine = ksz_ptp_adjfine, + .adjtime = ksz_ptp_adjtime, +}; + +int ksz_ptp_clock_register(struct dsa_switch *ds) +{ + struct ksz_device *dev = ds->priv; + struct ksz_ptp_data *ptp_data; + int ret; + + ptp_data = &dev->ptp_data; + mutex_init(&ptp_data->lock); + + ptp_data->caps = ksz_ptp_caps; + + ret = ksz_ptp_start_clock(dev); + if (ret) + return ret; + + ptp_data->clock = ptp_clock_register(&ptp_data->caps, dev->dev); + if (IS_ERR_OR_NULL(ptp_data->clock)) + return PTR_ERR(ptp_data->clock); + + ret = ksz_rmw16(dev, REG_PTP_MSG_CONF1, PTP_802_1AS, PTP_802_1AS); + if (ret) + goto error_unregister_clock; + + return 0; + +error_unregister_clock: + ptp_clock_unregister(ptp_data->clock); + return ret; +} + +void ksz_ptp_clock_unregister(struct dsa_switch *ds) +{ + struct ksz_device *dev = ds->priv; + struct ksz_ptp_data *ptp_data; + + ptp_data = &dev->ptp_data; + + if (ptp_data->clock) + ptp_clock_unregister(ptp_data->clock); +} + +MODULE_AUTHOR("Christian Eggers "); +MODULE_AUTHOR("Arun Ramadoss "); +MODULE_DESCRIPTION("PTP support for KSZ switch"); +MODULE_LICENSE("GPL"); diff --git a/drivers/net/dsa/microchip/ksz_ptp.h b/drivers/net/dsa/microchip/ksz_ptp.h new file mode 100644 index 000000000000..ea9fa46caa01 --- /dev/null +++ b/drivers/net/dsa/microchip/ksz_ptp.h @@ -0,0 +1,45 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* Microchip KSZ PTP Implementation + * Copyright (C) 2022 Microchip Technology Inc. + */ + +#ifndef _NET_DSA_DRIVERS_KSZ_PTP_H +#define _NET_DSA_DRIVERS_KSZ_PTP_H + +#if IS_ENABLED(CONFIG_NET_DSA_MICROCHIP_KSZ_PTP) + +#include + +struct ksz_ptp_data { + struct ptp_clock_info caps; + struct ptp_clock *clock; + /* Serializes all operations on the PTP hardware clock */ + struct mutex lock; +}; + +int ksz_ptp_clock_register(struct dsa_switch *ds); + +void ksz_ptp_clock_unregister(struct dsa_switch *ds); + +int ksz_get_ts_info(struct dsa_switch *ds, int port, + struct ethtool_ts_info *ts); + +#else + +struct ksz_ptp_data { + /* Serializes all operations on the PTP hardware clock */ + struct mutex lock; +}; + +static inline int ksz_ptp_clock_register(struct dsa_switch *ds) +{ + return 0; +} + +static inline void ksz_ptp_clock_unregister(struct dsa_switch *ds) { } + +#define ksz_get_ts_info NULL + +#endif /* End of CONFIG_NET_DSA_MICROCHIP_KSZ_PTP */ + +#endif diff --git a/drivers/net/dsa/microchip/ksz_ptp_reg.h b/drivers/net/dsa/microchip/ksz_ptp_reg.h new file mode 100644 index 000000000000..e578a0006ecf --- /dev/null +++ b/drivers/net/dsa/microchip/ksz_ptp_reg.h @@ -0,0 +1,57 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* Microchip KSZ PTP register definitions + * Copyright (C) 2022 Microchip Technology Inc. + */ + +#ifndef __KSZ_PTP_REGS_H +#define __KSZ_PTP_REGS_H + +/* 5 - PTP Clock */ +#define REG_PTP_CLK_CTRL 0x0500 + +#define PTP_STEP_ADJ BIT(6) +#define PTP_STEP_DIR BIT(5) +#define PTP_READ_TIME BIT(4) +#define PTP_LOAD_TIME BIT(3) +#define PTP_CLK_ADJ_ENABLE BIT(2) +#define PTP_CLK_ENABLE BIT(1) +#define PTP_CLK_RESET BIT(0) + +#define REG_PTP_RTC_SUB_NANOSEC__2 0x0502 + +#define PTP_RTC_SUB_NANOSEC_M 0x0007 +#define PTP_RTC_0NS 0x00 + +#define REG_PTP_RTC_NANOSEC 0x0504 +#define REG_PTP_RTC_NANOSEC_H 0x0504 +#define REG_PTP_RTC_NANOSEC_L 0x0506 + +#define REG_PTP_RTC_SEC 0x0508 +#define REG_PTP_RTC_SEC_H 0x0508 +#define REG_PTP_RTC_SEC_L 0x050A + +#define REG_PTP_SUBNANOSEC_RATE 0x050C +#define REG_PTP_SUBNANOSEC_RATE_H 0x050C +#define PTP_SUBNANOSEC_M 0x3FFFFFFF + +#define PTP_RATE_DIR BIT(31) +#define PTP_TMP_RATE_ENABLE BIT(30) + +#define REG_PTP_SUBNANOSEC_RATE_L 0x050E + +#define REG_PTP_RATE_DURATION 0x0510 +#define REG_PTP_RATE_DURATION_H 0x0510 +#define REG_PTP_RATE_DURATION_L 0x0512 + +#define REG_PTP_MSG_CONF1 0x0514 + +#define PTP_802_1AS BIT(7) +#define PTP_ENABLE BIT(6) +#define PTP_ETH_ENABLE BIT(5) +#define PTP_IPV4_UDP_ENABLE BIT(4) +#define PTP_IPV6_UDP_ENABLE BIT(3) +#define PTP_TC_P2P BIT(2) +#define PTP_MASTER BIT(1) +#define PTP_1STEP BIT(0) + +#endif