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NETC V4 Timer provides current time with nanosecond resolution, precise periodic pulse, pulse on timeout (alarm), and time capture on external pulse support. And it supports time synchronization as required for IEEE 1588 and IEEE 802.1AS-2020. Inside NETC, ENETC can capture the timestamp of the sent/received packet through the PHC provided by the Timer and record it on the Tx/Rx BD. And through the relevant PHC interfaces provided by the driver, the enetc V4 driver can support PTP time synchronization. In addition, NETC V4 Timer is similar to the QorIQ 1588 timer, but it is not exactly the same. The current ptp-qoriq driver is not compatible with NETC V4 Timer, most of the code cannot be reused, see below reasons. 1. The architecture of ptp-qoriq driver makes the register offset fixed, however, the offsets of all the high registers and low registers of V4 are swapped, and V4 also adds some new registers. so extending ptp-qoriq to make it compatible with V4 Timer is tantamount to completely rewriting ptp-qoriq driver. 2. The usage of some functions is somewhat different from QorIQ timer, such as the setting of TCLK_PERIOD and TMR_ADD, the logic of configuring PPS, etc., so making the driver compatible with V4 Timer will undoubtedly increase the complexity of the code and reduce readability. 3. QorIQ is an expired brand. It is difficult for us to verify whether it works stably on the QorIQ platforms if we refactor the driver, and this will make maintenance difficult, so refactoring the driver obviously does not bring any benefits. Therefore, add this new driver for NETC V4 Timer. Note that the missing features like PEROUT, PPS and EXTTS will be added in subsequent patches. Signed-off-by: Wei Fang <wei.fang@nxp.com> Reviewed-by: Frank Li <Frank.Li@nxp.com> Link: https://patch.msgid.link/20250829050615.1247468-5-wei.fang@nxp.com Signed-off-by: Paolo Abeni <pabeni@redhat.com>
267 lines
8.9 KiB
Plaintext
267 lines
8.9 KiB
Plaintext
# SPDX-License-Identifier: GPL-2.0-only
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#
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# PTP clock support configuration
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#
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menu "PTP clock support"
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config PTP_1588_CLOCK
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tristate "PTP clock support"
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depends on NET && POSIX_TIMERS
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default ETHERNET
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select PPS
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select NET_PTP_CLASSIFY
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help
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The IEEE 1588 standard defines a method to precisely
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synchronize distributed clocks over Ethernet networks. The
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standard defines a Precision Time Protocol (PTP), which can
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be used to achieve synchronization within a few dozen
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microseconds. In addition, with the help of special hardware
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time stamping units, it can be possible to achieve
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synchronization to within a few hundred nanoseconds.
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This driver adds support for PTP clocks as character
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devices. If you want to use a PTP clock, then you should
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also enable at least one clock driver as well.
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To compile this driver as a module, choose M here: the module
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will be called ptp.
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config PTP_1588_CLOCK_OPTIONAL
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tristate
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default y if PTP_1588_CLOCK=n
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default PTP_1588_CLOCK
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help
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Drivers that can optionally use the PTP_1588_CLOCK framework
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should depend on this symbol to prevent them from being built
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into vmlinux while the PTP support itself is in a loadable
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module.
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If PTP support is disabled, this dependency will still be
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met, and drivers refer to dummy helpers.
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config PTP_1588_CLOCK_DTE
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tristate "Broadcom DTE as PTP clock"
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depends on PTP_1588_CLOCK
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depends on NET && HAS_IOMEM
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depends on ARCH_BCM_MOBILE || (ARCH_BCM_IPROC && !(ARCH_BCM_NSP || ARCH_BCM_5301X)) || COMPILE_TEST
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default y if ARCH_BCM_MOBILE || ARCH_BCM_IPROC
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help
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This driver adds support for using the Digital timing engine
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(DTE) in the Broadcom SoC's as a PTP clock.
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The clock can be used in both wired and wireless networks
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for PTP purposes.
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To compile this driver as a module, choose M here: the module
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will be called ptp_dte.
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config PTP_1588_CLOCK_QORIQ
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tristate "Freescale QorIQ 1588 timer as PTP clock"
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depends on GIANFAR || FSL_DPAA_ETH || FSL_DPAA2_ETH || FSL_ENETC || FSL_ENETC_VF || COMPILE_TEST
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depends on PTP_1588_CLOCK
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default y if GIANFAR || FSL_DPAA_ETH || FSL_DPAA2_ETH || FSL_ENETC || FSL_ENETC_VF
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help
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This driver adds support for using the Freescale QorIQ 1588
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timer as a PTP clock. This clock is only useful if your PTP
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programs are getting hardware time stamps on the PTP Ethernet
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packets using the SO_TIMESTAMPING API.
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To compile this driver as a module, choose M here: the module
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will be called ptp-qoriq.
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comment "Enable PHYLIB and NETWORK_PHY_TIMESTAMPING to see the additional clocks."
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depends on PHYLIB=n || NETWORK_PHY_TIMESTAMPING=n
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config DP83640_PHY
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tristate "Driver for the National Semiconductor DP83640 PHYTER"
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depends on NETWORK_PHY_TIMESTAMPING
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depends on PHYLIB
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depends on PTP_1588_CLOCK
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select CRC32
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help
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Supports the DP83640 PHYTER with IEEE 1588 features.
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This driver adds support for using the DP83640 as a PTP
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clock. This clock is only useful if your PTP programs are
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getting hardware time stamps on the PTP Ethernet packets
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using the SO_TIMESTAMPING API.
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In order for this to work, your MAC driver must also
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implement the skb_tx_timestamp() function.
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config PTP_1588_CLOCK_INES
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tristate "ZHAW InES PTP time stamping IP core"
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depends on NETWORK_PHY_TIMESTAMPING
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depends on HAS_IOMEM
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depends on PHYLIB
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depends on PTP_1588_CLOCK
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help
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This driver adds support for using the ZHAW InES 1588 IP
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core. This clock is only useful if the MII bus of your MAC
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is wired up to the core.
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config PTP_1588_CLOCK_PCH
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tristate "Intel PCH EG20T as PTP clock"
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depends on MIPS_GENERIC || X86_32 || COMPILE_TEST
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depends on HAS_IOMEM && PCI
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depends on NET
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depends on PTP_1588_CLOCK
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help
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This driver adds support for using the PCH EG20T as a PTP
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clock. The hardware supports time stamping of PTP packets
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when using the end-to-end delay (E2E) mechanism. The peer
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delay mechanism (P2P) is not supported.
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This clock is only useful if your PTP programs are getting
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hardware time stamps on the PTP Ethernet packets using the
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SO_TIMESTAMPING API.
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To compile this driver as a module, choose M here: the module
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will be called ptp_pch.
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config PTP_1588_CLOCK_KVM
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tristate "KVM virtual PTP clock"
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depends on PTP_1588_CLOCK
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depends on (KVM_GUEST && X86) || (HAVE_ARM_SMCCC_DISCOVERY && ARM_ARCH_TIMER)
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default y
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help
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This driver adds support for using kvm infrastructure as a PTP
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clock. This clock is only useful if you are using KVM guests.
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To compile this driver as a module, choose M here: the module
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will be called ptp_kvm.
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config PTP_1588_CLOCK_VMCLOCK
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tristate "Virtual machine PTP clock"
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depends on X86_TSC || ARM_ARCH_TIMER
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depends on PTP_1588_CLOCK && ACPI && ARCH_SUPPORTS_INT128
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default PTP_1588_CLOCK_KVM
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help
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This driver adds support for using a virtual precision clock
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advertised by the hypervisor. This clock is only useful in virtual
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machines where such a device is present.
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Unlike the KVM virtual PTP clock, the VMCLOCK device offers support
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for reliable timekeeping even across live migration. So this driver
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is enabled by default whenever the KVM PTP clock is.
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To compile this driver as a module, choose M here: the module
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will be called ptp_vmclock.
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config PTP_1588_CLOCK_IDT82P33
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tristate "IDT 82P33xxx PTP clock"
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depends on PTP_1588_CLOCK && I2C
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default n
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help
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This driver adds support for using the IDT 82P33xxx as a PTP
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clock. This clock is only useful if your time stamping MAC
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is connected to the IDT chip.
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To compile this driver as a module, choose M here: the module
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will be called ptp_idt82p33.
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config PTP_1588_CLOCK_IDTCM
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tristate "IDT CLOCKMATRIX as PTP clock"
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depends on PTP_1588_CLOCK && I2C
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default n
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help
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This driver adds support for using IDT CLOCKMATRIX(TM) as a PTP
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clock. This clock is only useful if your time stamping MAC
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is connected to the IDT chip.
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To compile this driver as a module, choose M here: the module
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will be called ptp_clockmatrix.
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config PTP_1588_CLOCK_FC3W
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tristate "RENESAS FemtoClock3 Wireless as PTP clock"
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depends on PTP_1588_CLOCK && I2C
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default n
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help
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This driver adds support for using Renesas FemtoClock3 Wireless
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as a PTP clock. This clock is only useful if your time stamping
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MAC is connected to the RENESAS chip.
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To compile this driver as a module, choose M here: the module
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will be called ptp_fc3.
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config PTP_1588_CLOCK_MOCK
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tristate "Mock-up PTP clock"
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depends on PTP_1588_CLOCK
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help
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This driver offers a set of PTP clock manipulation operations over
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the system monotonic time. It can be used by virtual network device
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drivers to emulate PTP capabilities.
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To compile this driver as a module, choose M here: the module
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will be called ptp_mock.
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config PTP_1588_CLOCK_VMW
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tristate "VMware virtual PTP clock"
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depends on ACPI && HYPERVISOR_GUEST && X86
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depends on PTP_1588_CLOCK
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help
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This driver adds support for using VMware virtual precision
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clock device as a PTP clock. This is only useful in virtual
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machines running on VMware virtual infrastructure.
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To compile this driver as a module, choose M here: the module
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will be called ptp_vmw.
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config PTP_1588_CLOCK_OCP
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tristate "OpenCompute TimeCard as PTP clock"
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depends on PTP_1588_CLOCK
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depends on HAS_IOMEM && PCI
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depends on I2C && MTD
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depends on SERIAL_8250
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depends on !S390
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depends on COMMON_CLK
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select NET_DEVLINK
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select CRC16
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select DPLL
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help
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This driver adds support for an OpenCompute time card.
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The OpenCompute time card is an atomic clock along with
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a GPS receiver that provides a Grandmaster clock source
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for a PTP enabled network.
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More information is available at http://www.timingcard.com/
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config PTP_DFL_TOD
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tristate "FPGA DFL ToD Driver"
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depends on FPGA_DFL
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depends on PTP_1588_CLOCK
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help
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The DFL (Device Feature List) device driver for the Intel ToD
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(Time-of-Day) device in FPGA card. The ToD IP within the FPGA
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is exposed as PTP Hardware Clock (PHC) device to the Linux PTP
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stack to synchronize the system clock to its ToD information
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using phc2sys utility of the Linux PTP stack.
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To compile this driver as a module, choose M here: the module
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will be called ptp_dfl_tod.
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config PTP_S390
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tristate "S390 PTP driver"
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depends on PTP_1588_CLOCK
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depends on S390
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help
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This driver adds support for S390 time steering via the PtP
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interface. This works by adding a in-kernel clock delta value,
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which is always added to time values used in the kernel. The PtP
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driver provides the raw clock value without the delta to
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userspace. That way userspace programs like chrony could steer
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the kernel clock.
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config PTP_NETC_V4_TIMER
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tristate "NXP NETC V4 Timer PTP Driver"
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depends on PTP_1588_CLOCK
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depends on PCI_MSI
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help
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This driver adds support for using the NXP NETC V4 Timer as a PTP
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clock, the clock is used by ENETC V4 or NETC V4 Switch for PTP time
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synchronization. It also supports periodic output signal (e.g. PPS)
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and external trigger timestamping.
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endmenu
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