From patchwork Sun Sep 18 18:49:08 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nicolas Pitre X-Patchwork-Id: 76492 Delivered-To: patch@linaro.org Received: by 10.140.106.72 with SMTP id d66csp623581qgf; Sun, 18 Sep 2016 11:49:23 -0700 (PDT) X-Received: by 10.98.139.220 with SMTP id e89mr40135660pfl.125.1474224563738; Sun, 18 Sep 2016 11:49:23 -0700 (PDT) Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id p23si37613445pfj.147.2016.09.18.11.49.23; Sun, 18 Sep 2016 11:49:23 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=pass header.i=@linaro.org; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE dis=NONE) header.from=linaro.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758462AbcIRStU (ORCPT + 27 others); Sun, 18 Sep 2016 14:49:20 -0400 Received: from mail-qk0-f180.google.com ([209.85.220.180]:36837 "EHLO mail-qk0-f180.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754189AbcIRStL (ORCPT ); Sun, 18 Sep 2016 14:49:11 -0400 Received: by mail-qk0-f180.google.com with SMTP id z190so130082791qkc.3 for ; Sun, 18 Sep 2016 11:49:10 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=date:from:to:cc:subject:in-reply-to:message-id:references :user-agent:mime-version; bh=p6TVQIK0F+KWGerc63Jr78zBZ4zsmAmwyhPZwckOJ4A=; b=exaIVLUcRY4E78Tp1+pPKXJjfh8x4swzQKfKgRD11uI93yuprPbHpeQg8MZrQBQQre kMYVZINBG/aHJ6GOO4kEOxHkzayNs9uBIUKSaulMLqC/JNfvTzjIsA2B+3ERFlURzTK6 UAy6KcmNgg+rat71N/LZhe2ou8PS/Z8vlAiL8= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:date:from:to:cc:subject:in-reply-to:message-id :references:user-agent:mime-version; bh=p6TVQIK0F+KWGerc63Jr78zBZ4zsmAmwyhPZwckOJ4A=; b=czlr0K2nAslVTNjz3R5sbtFkYetPBehqJ9M2Okx9W6c0MSy+VdJX/uGRfEiJXlUI98 NU5QqiPDMqWU38axxtCGA5vXQkP/x/x/Yksqq7YqlYdz1VCktd4hk8svfsCzqNGT13fX m13K2SL2G6ROw5I3M6YBKz0hGkX9XvcMxn+Luu/ZhWnVlqNX52EhbXD4+U392Wb3lCXF E5XImgfKl3hOI5NLFHg9fASHQVz+UrtCiJXB9GqDMyXMLmoI3wV6xlPH16iVAfcoRQQ0 FDN7Hlzym3jzQrwjfddTw3gL6wC97x28H+sMPJHwoPX3Vafjni37lUiMkMz77Ass8cxm RY2w== X-Gm-Message-State: AE9vXwMqvO2cjCgfSPSW+PNhGmSNnb+YxE3uQ+061Ka6GlwLIzfGGC/LSHX9V7sHkMj/e5oz X-Received: by 10.55.82.66 with SMTP id g63mr27965377qkb.227.1474224549912; Sun, 18 Sep 2016 11:49:09 -0700 (PDT) Received: from xanadu.home ([2607:fa48:6e39:d410:feaa:14ff:fea7:ed77]) by smtp.gmail.com with ESMTPSA id v10sm10917980qkg.20.2016.09.18.11.49.08 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Sun, 18 Sep 2016 11:49:09 -0700 (PDT) Date: Sun, 18 Sep 2016 14:49:08 -0400 (EDT) From: Nicolas Pitre To: Richard Cochran cc: Josh Triplett , John Stultz , Thomas Gleixner , lkml Subject: Re: [PATCH v3) posix-timers: make it configurable In-Reply-To: <20160918182054.GA9643@localhost.localdomain> Message-ID: References: <20160915210724.GB4245@localhost.localdomain> <20160915211555.GA16992@cloud> <20160915215649.GA17171@cloud> <20160916072421.GA14160@localhost.localdomain> <20160918143529.GA4651@localhost.localdomain> <20160918182054.GA9643@localhost.localdomain> User-Agent: Alpine 2.20 (LFD 67 2015-01-07) MIME-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sun, 18 Sep 2016, Richard Cochran wrote: > On Sun, Sep 18, 2016 at 12:54:58PM -0400, Nicolas Pitre wrote: > > > > +config PTP_1588_CLOCK_DEFAULT > > > > + tristate > > > > > > I see what this option is doing, but I wonder about the name > > > "DEFAULT". In what sense is this a default? > > > > It provides the default answer for when the PTP_1588_CLOCK config option > > is available. I could have called it HAVE_PTP_1588_CLOCK or > > PTP_1588_CLOCK_WANTED but none of the alternatives struck me as any > > better. Any idea? > > How about: PTP_1588_CLOCK_SELECTED ? It sounds just as good to me. Who should merge this patch? ----- >8 Subject: [PATCH v2] ptp_clock: allow for it to be optional In order to break the hard dependency between the PTP clock subsystem and ethernet drivers capable of being clock providers, this patch provides simple PTP stub functions to allow linkage of those drivers into the kernel even when the PTP subsystem is configured out. And to make it possible for PTP to be configured out, the select statement in the Kconfig entry for those ethernet drivers is changed from selecting PTP_1588_CLOCK to PTP_1588_CLOCK_SELECTED whose purpose is to indicate the default Kconfig value for the PTP subsystem. This way the PTP subsystem may have Kconfig dependencies of its own, such as POSIX_TIMERS, without making those ethernet drivers unavailable if POSIX timers are cconfigured out. And when support for POSIX timers is selected again then PTP clock support will also be selected accordingly. Drivers must be ready to accept NULL from ptp_clock_register(). The pch_gbe driver is a bit special as it relies on extra code in drivers/ptp/ptp_pch.c. Therefore we let the make process descend into drivers/ptp/ even if PTP_1588_CLOCK is unselected. Signed-off-by: Nicolas Pitre --- Changes from v1: - Documented ptp_clock_register() returning NULL in the code - s/PTP_1588_CLOCK_DEFAULT/PTP_1588_CLOCK_SELECTED/ diff --git a/drivers/Makefile b/drivers/Makefile index 53abb4a5f7..8a538d0856 100644 --- a/drivers/Makefile +++ b/drivers/Makefile @@ -105,7 +105,7 @@ obj-$(CONFIG_INPUT) += input/ obj-$(CONFIG_RTC_LIB) += rtc/ obj-y += i2c/ media/ obj-$(CONFIG_PPS) += pps/ -obj-$(CONFIG_PTP_1588_CLOCK) += ptp/ +obj-y += ptp/ obj-$(CONFIG_W1) += w1/ obj-y += power/ obj-$(CONFIG_HWMON) += hwmon/ diff --git a/drivers/net/ethernet/adi/Kconfig b/drivers/net/ethernet/adi/Kconfig index 6b94ba6103..67094a9cfe 100644 --- a/drivers/net/ethernet/adi/Kconfig +++ b/drivers/net/ethernet/adi/Kconfig @@ -55,10 +55,14 @@ config BFIN_RX_DESC_NUM ---help--- Set the number of buffer packets used in driver. +config BFIN_MAC_HAS_HWSTAMP + def_tristate BFIN_MAC + depends on BF518 + select PTP_1588_CLOCK_SELECTED + config BFIN_MAC_USE_HWSTAMP bool "Use IEEE 1588 hwstamp" - depends on BFIN_MAC && BF518 - select PTP_1588_CLOCK + depends on BFIN_MAC_HAS_HWSTAMP && PTP_1588_CLOCK default y ---help--- To support the IEEE 1588 Precision Time Protocol (PTP), select y here diff --git a/drivers/net/ethernet/amd/Kconfig b/drivers/net/ethernet/amd/Kconfig index 0038709fd3..327e71a554 100644 --- a/drivers/net/ethernet/amd/Kconfig +++ b/drivers/net/ethernet/amd/Kconfig @@ -177,7 +177,7 @@ config AMD_XGBE depends on ARM64 || COMPILE_TEST select BITREVERSE select CRC32 - select PTP_1588_CLOCK + select PTP_1588_CLOCK_SELECTED ---help--- This driver supports the AMD 10GbE Ethernet device found on an AMD SoC. diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-main.c b/drivers/net/ethernet/amd/xgbe/xgbe-main.c index 3eee3201b5..4aeeb018b6 100644 --- a/drivers/net/ethernet/amd/xgbe/xgbe-main.c +++ b/drivers/net/ethernet/amd/xgbe/xgbe-main.c @@ -773,7 +773,8 @@ static int xgbe_probe(struct platform_device *pdev) goto err_wq; } - xgbe_ptp_register(pdata); + if (IS_REACHABLE(CONFIG_PTP_1588_CLOCK)) + xgbe_ptp_register(pdata); xgbe_debugfs_init(pdata); @@ -812,7 +813,8 @@ static int xgbe_remove(struct platform_device *pdev) xgbe_debugfs_exit(pdata); - xgbe_ptp_unregister(pdata); + if (IS_REACHABLE(CONFIG_PTP_1588_CLOCK)) + xgbe_ptp_unregister(pdata); flush_workqueue(pdata->an_workqueue); destroy_workqueue(pdata->an_workqueue); diff --git a/drivers/net/ethernet/broadcom/Kconfig b/drivers/net/ethernet/broadcom/Kconfig index bd8c80c0b7..3db7eca92c 100644 --- a/drivers/net/ethernet/broadcom/Kconfig +++ b/drivers/net/ethernet/broadcom/Kconfig @@ -110,7 +110,7 @@ config TIGON3 depends on PCI select PHYLIB select HWMON - select PTP_1588_CLOCK + select PTP_1588_CLOCK_SELECTED ---help--- This driver supports Broadcom Tigon3 based gigabit Ethernet cards. @@ -120,7 +120,7 @@ config TIGON3 config BNX2X tristate "Broadcom NetXtremeII 10Gb support" depends on PCI - select PTP_1588_CLOCK + select PTP_1588_CLOCK_SELECTED select FW_LOADER select ZLIB_INFLATE select LIBCRC32C diff --git a/drivers/net/ethernet/cavium/Kconfig b/drivers/net/ethernet/cavium/Kconfig index e1b78b5003..5dd86cf683 100644 --- a/drivers/net/ethernet/cavium/Kconfig +++ b/drivers/net/ethernet/cavium/Kconfig @@ -53,7 +53,7 @@ config THUNDER_NIC_RGX config LIQUIDIO tristate "Cavium LiquidIO support" depends on 64BIT - select PTP_1588_CLOCK + select PTP_1588_CLOCK_SELECTED select FW_LOADER select LIBCRC32C ---help--- diff --git a/drivers/net/ethernet/freescale/Kconfig b/drivers/net/ethernet/freescale/Kconfig index d1ca45fbb1..775dbfeb7b 100644 --- a/drivers/net/ethernet/freescale/Kconfig +++ b/drivers/net/ethernet/freescale/Kconfig @@ -25,7 +25,7 @@ config FEC ARCH_MXC || SOC_IMX28) default ARCH_MXC || SOC_IMX28 if ARM select PHYLIB - select PTP_1588_CLOCK + select PTP_1588_CLOCK_SELECTED ---help--- Say Y here if you want to use the built-in 10/100 Fast ethernet controller on some Motorola ColdFire and Freescale i.MX processors. diff --git a/drivers/net/ethernet/intel/Kconfig b/drivers/net/ethernet/intel/Kconfig index c0e17433f6..8bbfb43f09 100644 --- a/drivers/net/ethernet/intel/Kconfig +++ b/drivers/net/ethernet/intel/Kconfig @@ -58,7 +58,7 @@ config E1000E tristate "Intel(R) PRO/1000 PCI-Express Gigabit Ethernet support" depends on PCI && (!SPARC32 || BROKEN) select CRC32 - select PTP_1588_CLOCK + select PTP_1588_CLOCK_SELECTED ---help--- This driver supports the PCI-Express Intel(R) PRO/1000 gigabit ethernet family of adapters. For PCI or PCI-X e1000 adapters, @@ -83,7 +83,7 @@ config E1000E_HWTS config IGB tristate "Intel(R) 82575/82576 PCI-Express Gigabit Ethernet support" depends on PCI - select PTP_1588_CLOCK + select PTP_1588_CLOCK_SELECTED select I2C select I2C_ALGOBIT ---help--- @@ -156,7 +156,7 @@ config IXGBE tristate "Intel(R) 10GbE PCI Express adapters support" depends on PCI select MDIO - select PTP_1588_CLOCK + select PTP_1588_CLOCK_SELECTED ---help--- This driver supports Intel(R) 10GbE PCI Express family of adapters. For more information on how to identify your adapter, go @@ -213,7 +213,7 @@ config IXGBEVF config I40E tristate "Intel(R) Ethernet Controller XL710 Family support" - select PTP_1588_CLOCK + select PTP_1588_CLOCK_SELECTED depends on PCI ---help--- This driver supports Intel(R) Ethernet Controller XL710 Family of @@ -264,7 +264,7 @@ config FM10K tristate "Intel(R) FM10000 Ethernet Switch Host Interface Support" default n depends on PCI_MSI - select PTP_1588_CLOCK + select PTP_1588_CLOCK_SELECTED ---help--- This driver supports Intel(R) FM10000 Ethernet Switch Host Interface. For more information on how to identify your adapter, diff --git a/drivers/net/ethernet/intel/e1000e/ptp.c b/drivers/net/ethernet/intel/e1000e/ptp.c index 2e1b17ad52..ad03763e00 100644 --- a/drivers/net/ethernet/intel/e1000e/ptp.c +++ b/drivers/net/ethernet/intel/e1000e/ptp.c @@ -334,7 +334,7 @@ void e1000e_ptp_init(struct e1000_adapter *adapter) if (IS_ERR(adapter->ptp_clock)) { adapter->ptp_clock = NULL; e_err("ptp_clock_register failed\n"); - } else { + } else if (adapter->ptp_clock) { e_info("registered PHC clock\n"); } } diff --git a/drivers/net/ethernet/intel/i40e/i40e_ptp.c b/drivers/net/ethernet/intel/i40e/i40e_ptp.c index ed39cbad24..f1feceab75 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_ptp.c +++ b/drivers/net/ethernet/intel/i40e/i40e_ptp.c @@ -669,7 +669,7 @@ void i40e_ptp_init(struct i40e_pf *pf) pf->ptp_clock = NULL; dev_err(&pf->pdev->dev, "%s: ptp_clock_register failed\n", __func__); - } else { + } else if (pf->ptp_clock) { struct timespec64 ts; u32 regval; diff --git a/drivers/net/ethernet/intel/igb/igb_ptp.c b/drivers/net/ethernet/intel/igb/igb_ptp.c index 66dfa2085c..1dd14e166d 100644 --- a/drivers/net/ethernet/intel/igb/igb_ptp.c +++ b/drivers/net/ethernet/intel/igb/igb_ptp.c @@ -1159,7 +1159,7 @@ void igb_ptp_init(struct igb_adapter *adapter) if (IS_ERR(adapter->ptp_clock)) { adapter->ptp_clock = NULL; dev_err(&adapter->pdev->dev, "ptp_clock_register failed\n"); - } else { + } else if (adapter->ptp_clock) { dev_info(&adapter->pdev->dev, "added PHC on %s\n", adapter->netdev->name); adapter->ptp_flags |= IGB_PTP_ENABLED; diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_ptp.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_ptp.c index e5431bfe33..a92277683a 100644 --- a/drivers/net/ethernet/intel/ixgbe/ixgbe_ptp.c +++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_ptp.c @@ -1254,7 +1254,7 @@ static long ixgbe_ptp_create_clock(struct ixgbe_adapter *adapter) adapter->ptp_clock = NULL; e_dev_err("ptp_clock_register failed\n"); return err; - } else + } else if (adapter->ptp_clock) e_dev_info("registered PHC device on %s\n", netdev->name); /* set default timestamp mode to disabled here. We do this in diff --git a/drivers/net/ethernet/mellanox/mlx4/Kconfig b/drivers/net/ethernet/mellanox/mlx4/Kconfig index 5098e7f219..b2998bc5ab 100644 --- a/drivers/net/ethernet/mellanox/mlx4/Kconfig +++ b/drivers/net/ethernet/mellanox/mlx4/Kconfig @@ -7,7 +7,7 @@ config MLX4_EN depends on MAY_USE_DEVLINK depends on PCI select MLX4_CORE - select PTP_1588_CLOCK + select PTP_1588_CLOCK_SELECTED ---help--- This driver supports Mellanox Technologies ConnectX Ethernet devices. diff --git a/drivers/net/ethernet/mellanox/mlx4/en_clock.c b/drivers/net/ethernet/mellanox/mlx4/en_clock.c index 1494997c4f..08fc5fc56d 100644 --- a/drivers/net/ethernet/mellanox/mlx4/en_clock.c +++ b/drivers/net/ethernet/mellanox/mlx4/en_clock.c @@ -298,7 +298,7 @@ void mlx4_en_init_timestamp(struct mlx4_en_dev *mdev) if (IS_ERR(mdev->ptp_clock)) { mdev->ptp_clock = NULL; mlx4_err(mdev, "ptp_clock_register failed\n"); - } else { + } else if (mdev->ptp_clock) { mlx4_info(mdev, "registered PHC clock\n"); } diff --git a/drivers/net/ethernet/mellanox/mlx5/core/Kconfig b/drivers/net/ethernet/mellanox/mlx5/core/Kconfig index aae46884bf..0d679346dc 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/Kconfig +++ b/drivers/net/ethernet/mellanox/mlx5/core/Kconfig @@ -14,7 +14,7 @@ config MLX5_CORE config MLX5_CORE_EN bool "Mellanox Technologies ConnectX-4 Ethernet support" depends on NETDEVICES && ETHERNET && PCI && MLX5_CORE - select PTP_1588_CLOCK + select PTP_1588_CLOCK_SELECTED default n ---help--- Ethernet support in Mellanox Technologies ConnectX-4 NIC. diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_clock.c b/drivers/net/ethernet/mellanox/mlx5/core/en_clock.c index 847a8f3ac2..13dc388667 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/en_clock.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/en_clock.c @@ -273,7 +273,7 @@ void mlx5e_timestamp_init(struct mlx5e_priv *priv) tstamp->ptp = ptp_clock_register(&tstamp->ptp_info, &priv->mdev->pdev->dev); - if (IS_ERR_OR_NULL(tstamp->ptp)) { + if (IS_ERR(tstamp->ptp)) { mlx5_core_warn(priv->mdev, "ptp_clock_register failed %ld\n", PTR_ERR(tstamp->ptp)); tstamp->ptp = NULL; diff --git a/drivers/net/ethernet/renesas/Kconfig b/drivers/net/ethernet/renesas/Kconfig index 4f132cf177..6862a9c1b6 100644 --- a/drivers/net/ethernet/renesas/Kconfig +++ b/drivers/net/ethernet/renesas/Kconfig @@ -37,7 +37,7 @@ config RAVB select MII select MDIO_BITBANG select PHYLIB - select PTP_1588_CLOCK + select PTP_1588_CLOCK_SELECTED help Renesas Ethernet AVB device driver. This driver supports the following SoCs: diff --git a/drivers/net/ethernet/samsung/Kconfig b/drivers/net/ethernet/samsung/Kconfig index 2360d81507..121b7e4426 100644 --- a/drivers/net/ethernet/samsung/Kconfig +++ b/drivers/net/ethernet/samsung/Kconfig @@ -21,7 +21,7 @@ config SXGBE_ETH depends on HAS_IOMEM && HAS_DMA select PHYLIB select CRC32 - select PTP_1588_CLOCK + select PTP_1588_CLOCK_SELECTED ---help--- This is the driver for the SXGBE 10G Ethernet IP block found on Samsung platforms. diff --git a/drivers/net/ethernet/sfc/Kconfig b/drivers/net/ethernet/sfc/Kconfig index 4dd92b7b80..472152bd72 100644 --- a/drivers/net/ethernet/sfc/Kconfig +++ b/drivers/net/ethernet/sfc/Kconfig @@ -5,7 +5,7 @@ config SFC select CRC32 select I2C select I2C_ALGOBIT - select PTP_1588_CLOCK + select PTP_1588_CLOCK_SELECTED ---help--- This driver supports 10/40-gigabit Ethernet cards based on the Solarflare SFC4000, SFC9000-family and SFC9100-family diff --git a/drivers/net/ethernet/sfc/ptp.c b/drivers/net/ethernet/sfc/ptp.c index dd204d9704..77a5364f7a 100644 --- a/drivers/net/ethernet/sfc/ptp.c +++ b/drivers/net/ethernet/sfc/ptp.c @@ -1269,13 +1269,13 @@ int efx_ptp_probe(struct efx_nic *efx, struct efx_channel *channel) if (IS_ERR(ptp->phc_clock)) { rc = PTR_ERR(ptp->phc_clock); goto fail3; - } - - INIT_WORK(&ptp->pps_work, efx_ptp_pps_worker); - ptp->pps_workwq = create_singlethread_workqueue("sfc_pps"); - if (!ptp->pps_workwq) { - rc = -ENOMEM; - goto fail4; + } else if (ptp->phc_clock) { + INIT_WORK(&ptp->pps_work, efx_ptp_pps_worker); + ptp->pps_workwq = create_singlethread_workqueue("sfc_pps"); + if (!ptp->pps_workwq) { + rc = -ENOMEM; + goto fail4; + } } } ptp->nic_ts_enabled = false; diff --git a/drivers/net/ethernet/stmicro/stmmac/Kconfig b/drivers/net/ethernet/stmicro/stmmac/Kconfig index 8f06a6621a..578e5a15cb 100644 --- a/drivers/net/ethernet/stmicro/stmmac/Kconfig +++ b/drivers/net/ethernet/stmicro/stmmac/Kconfig @@ -4,7 +4,7 @@ config STMMAC_ETH select MII select PHYLIB select CRC32 - select PTP_1588_CLOCK + select PTP_1588_CLOCK_SELECTED select RESET_CONTROLLER ---help--- This is the driver for the Ethernet IPs are built around a diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_ptp.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_ptp.c index 170a18b612..6e3b82972c 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_ptp.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_ptp.c @@ -187,7 +187,7 @@ int stmmac_ptp_register(struct stmmac_priv *priv) if (IS_ERR(priv->ptp_clock)) { priv->ptp_clock = NULL; pr_err("ptp_clock_register() failed on %s\n", priv->dev->name); - } else + } else if (priv->ptp_clock) pr_debug("Added PTP HW clock successfully on %s\n", priv->dev->name); diff --git a/drivers/net/ethernet/ti/Kconfig b/drivers/net/ethernet/ti/Kconfig index 9904d740d5..bc895114c9 100644 --- a/drivers/net/ethernet/ti/Kconfig +++ b/drivers/net/ethernet/ti/Kconfig @@ -76,7 +76,7 @@ config TI_CPSW config TI_CPTS bool "TI Common Platform Time Sync (CPTS) Support" depends on TI_CPSW - select PTP_1588_CLOCK + select PTP_1588_CLOCK_SELECTED ---help--- This driver supports the Common Platform Time Sync unit of the CPSW Ethernet Switch. The unit can time stamp PTP UDP/IPv4 diff --git a/drivers/net/ethernet/tile/Kconfig b/drivers/net/ethernet/tile/Kconfig index f59a6c2653..b6ba43c78c 100644 --- a/drivers/net/ethernet/tile/Kconfig +++ b/drivers/net/ethernet/tile/Kconfig @@ -9,7 +9,7 @@ config TILE_NET select CRC32 select TILE_GXIO_MPIPE if TILEGX select HIGH_RES_TIMERS if TILEGX - select PTP_1588_CLOCK if TILEGX + select PTP_1588_CLOCK_SELECTED if TILEGX ---help--- This is a standard Linux network device driver for the on-chip Tilera Gigabit Ethernet and XAUI interfaces. diff --git a/drivers/ptp/Kconfig b/drivers/ptp/Kconfig index ee3de3421f..f34b3748c0 100644 --- a/drivers/ptp/Kconfig +++ b/drivers/ptp/Kconfig @@ -4,8 +4,12 @@ menu "PTP clock support" +config PTP_1588_CLOCK_SELECTED + tristate + config PTP_1588_CLOCK tristate "PTP clock support" + default PTP_1588_CLOCK_SELECTED depends on NET select PPS select NET_PTP_CLASSIFY @@ -28,7 +32,7 @@ config PTP_1588_CLOCK config PTP_1588_CLOCK_GIANFAR tristate "Freescale eTSEC as PTP clock" depends on GIANFAR - select PTP_1588_CLOCK + depends on PTP_1588_CLOCK default y help This driver adds support for using the eTSEC as a PTP @@ -42,7 +46,7 @@ config PTP_1588_CLOCK_GIANFAR config PTP_1588_CLOCK_IXP46X tristate "Intel IXP46x as PTP clock" depends on IXP4XX_ETH - select PTP_1588_CLOCK + depends on PTP_1588_CLOCK default y help This driver adds support for using the IXP46X as a PTP @@ -60,7 +64,7 @@ config DP83640_PHY tristate "Driver for the National Semiconductor DP83640 PHYTER" depends on NETWORK_PHY_TIMESTAMPING depends on PHYLIB - select PTP_1588_CLOCK + depends on PTP_1588_CLOCK ---help--- Supports the DP83640 PHYTER with IEEE 1588 features. @@ -76,7 +80,7 @@ config PTP_1588_CLOCK_PCH tristate "Intel PCH EG20T as PTP clock" depends on X86_32 || COMPILE_TEST depends on HAS_IOMEM && NET - select PTP_1588_CLOCK + select PTP_1588_CLOCK_SELECTED help This driver adds support for using the PCH EG20T as a PTP clock. The hardware supports time stamping of PTP packets diff --git a/include/linux/ptp_clock_kernel.h b/include/linux/ptp_clock_kernel.h index 6b15e16814..4c29eb8e53 100644 --- a/include/linux/ptp_clock_kernel.h +++ b/include/linux/ptp_clock_kernel.h @@ -122,24 +122,6 @@ struct ptp_clock_info { struct ptp_clock; -/** - * ptp_clock_register() - register a PTP hardware clock driver - * - * @info: Structure describing the new clock. - * @parent: Pointer to the parent device of the new clock. - */ - -extern struct ptp_clock *ptp_clock_register(struct ptp_clock_info *info, - struct device *parent); - -/** - * ptp_clock_unregister() - unregister a PTP hardware clock driver - * - * @ptp: The clock to remove from service. - */ - -extern int ptp_clock_unregister(struct ptp_clock *ptp); - enum ptp_clock_events { PTP_CLOCK_ALARM, @@ -166,6 +148,31 @@ struct ptp_clock_event { }; }; +#if IS_REACHABLE(CONFIG_PTP_1588_CLOCK) + +/** + * ptp_clock_register() - register a PTP hardware clock driver + * + * @info: Structure describing the new clock. + * @parent: Pointer to the parent device of the new clock. + * + * Returns a valid pointer on success or PTR_ERR on failure. If PHC + * support is missing at the configuration level, this function + * returns NULL, and drivers are expected to gracefully handle that + * case separately. + */ + +extern struct ptp_clock *ptp_clock_register(struct ptp_clock_info *info, + struct device *parent); + +/** + * ptp_clock_unregister() - unregister a PTP hardware clock driver + * + * @ptp: The clock to remove from service. + */ + +extern int ptp_clock_unregister(struct ptp_clock *ptp); + /** * ptp_clock_event() - notify the PTP layer about an event * @@ -197,4 +204,20 @@ extern int ptp_clock_index(struct ptp_clock *ptp); int ptp_find_pin(struct ptp_clock *ptp, enum ptp_pin_function func, unsigned int chan); +#else +static inline struct ptp_clock *ptp_clock_register(struct ptp_clock_info *info, + struct device *parent) +{ return NULL; } +static inline int ptp_clock_unregister(struct ptp_clock *ptp) +{ return 0; } +static inline void ptp_clock_event(struct ptp_clock *ptp, + struct ptp_clock_event *event) +{ (void)event; } +static inline int ptp_clock_index(struct ptp_clock *ptp) +{ return -1; } +static inline int ptp_find_pin(struct ptp_clock *ptp, + enum ptp_pin_function func, unsigned int chan) +{ return -1; } +#endif + #endif