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authorLinus Torvalds <torvalds@linux-foundation.org>2023-04-27 02:07:23 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2023-04-27 02:07:23 +0300
commit6e98b09da931a00bf4e0477d0fa52748bf28fcce (patch)
tree9c658ed95add5693f42f29f63df80a2ede3f6ec2 /drivers/ptp/ptp_dfl_tod.c
parentb68ee1c6131c540a62ecd443be89c406401df091 (diff)
parent9b78d919632b7149d311aaad5a977e4b48b10321 (diff)
downloadlinux-6e98b09da931a00bf4e0477d0fa52748bf28fcce.tar.xz
Merge tag 'net-next-6.4' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next
Pull networking updates from Paolo Abeni: "Core: - Introduce a config option to tweak MAX_SKB_FRAGS. Increasing the default value allows for better BIG TCP performances - Reduce compound page head access for zero-copy data transfers - RPS/RFS improvements, avoiding unneeded NET_RX_SOFTIRQ when possible - Threaded NAPI improvements, adding defer skb free support and unneeded softirq avoidance - Address dst_entry reference count scalability issues, via false sharing avoidance and optimize refcount tracking - Add lockless accesses annotation to sk_err[_soft] - Optimize again the skb struct layout - Extends the skb drop reasons to make it usable by multiple subsystems - Better const qualifier awareness for socket casts BPF: - Add skb and XDP typed dynptrs which allow BPF programs for more ergonomic and less brittle iteration through data and variable-sized accesses - Add a new BPF netfilter program type and minimal support to hook BPF programs to netfilter hooks such as prerouting or forward - Add more precise memory usage reporting for all BPF map types - Adds support for using {FOU,GUE} encap with an ipip device operating in collect_md mode and add a set of BPF kfuncs for controlling encap params - Allow BPF programs to detect at load time whether a particular kfunc exists or not, and also add support for this in light skeleton - Bigger batch of BPF verifier improvements to prepare for upcoming BPF open-coded iterators allowing for less restrictive looping capabilities - Rework RCU enforcement in the verifier, add kptr_rcu and enforce BPF programs to NULL-check before passing such pointers into kfunc - Add support for kptrs in percpu hashmaps, percpu LRU hashmaps and in local storage maps - Enable RCU semantics for task BPF kptrs and allow referenced kptr tasks to be stored in BPF maps - Add support for refcounted local kptrs to the verifier for allowing shared ownership, useful for adding a node to both the BPF list and rbtree - Add BPF verifier support for ST instructions in convert_ctx_access() which will help new -mcpu=v4 clang flag to start emitting them - Add ARM32 USDT support to libbpf - Improve bpftool's visual program dump which produces the control flow graph in a DOT format by adding C source inline annotations Protocols: - IPv4: Allow adding to IPv4 address a 'protocol' tag. Such value indicates the provenance of the IP address - IPv6: optimize route lookup, dropping unneeded R/W lock acquisition - Add the handshake upcall mechanism, allowing the user-space to implement generic TLS handshake on kernel's behalf - Bridge: support per-{Port, VLAN} neighbor suppression, increasing resilience to nodes failures - SCTP: add support for Fair Capacity and Weighted Fair Queueing schedulers - MPTCP: delay first subflow allocation up to its first usage. This will allow for later better LSM interaction - xfrm: Remove inner/outer modes from input/output path. These are not needed anymore - WiFi: - reduced neighbor report (RNR) handling for AP mode - HW timestamping support - support for randomized auth/deauth TA for PASN privacy - per-link debugfs for multi-link - TC offload support for mac80211 drivers - mac80211 mesh fast-xmit and fast-rx support - enable Wi-Fi 7 (EHT) mesh support Netfilter: - Add nf_tables 'brouting' support, to force a packet to be routed instead of being bridged - Update bridge netfilter and ovs conntrack helpers to handle IPv6 Jumbo packets properly, i.e. fetch the packet length from hop-by-hop extension header. This is needed for BIT TCP support - The iptables 32bit compat interface isn't compiled in by default anymore - Move ip(6)tables builtin icmp matches to the udptcp one. This has the advantage that icmp/icmpv6 match doesn't load the iptables/ip6tables modules anymore when iptables-nft is used - Extended netlink error report for netdevice in flowtables and netdev/chains. Allow for incrementally add/delete devices to netdev basechain. Allow to create netdev chain without device Driver API: - Remove redundant Device Control Error Reporting Enable, as PCI core has already error reporting enabled at enumeration time - Move Multicast DB netlink handlers to core, allowing devices other then bridge to use them - Allow the page_pool to directly recycle the pages from safely localized NAPI - Implement lockless TX queue stop/wake combo macros, allowing for further code de-duplication and sanitization - Add YNL support for user headers and struct attrs - Add partial YNL specification for devlink - Add partial YNL specification for ethtool - Add tc-mqprio and tc-taprio support for preemptible traffic classes - Add tx push buf len param to ethtool, specifies the maximum number of bytes of a transmitted packet a driver can push directly to the underlying device - Add basic LED support for switch/phy - Add NAPI documentation, stop relaying on external links - Convert dsa_master_ioctl() to netdev notifier. This is a preparatory work to make the hardware timestamping layer selectable by user space - Add transceiver support and improve the error messages for CAN-FD controllers New hardware / drivers: - Ethernet: - AMD/Pensando core device support - MediaTek MT7981 SoC - MediaTek MT7988 SoC - Broadcom BCM53134 embedded switch - Texas Instruments CPSW9G ethernet switch - Qualcomm EMAC3 DWMAC ethernet - StarFive JH7110 SoC - NXP CBTX ethernet PHY - WiFi: - Apple M1 Pro/Max devices - RealTek rtl8710bu/rtl8188gu - RealTek rtl8822bs, rtl8822cs and rtl8821cs SDIO chipset - Bluetooth: - Realtek RTL8821CS, RTL8851B, RTL8852BS - Mediatek MT7663, MT7922 - NXP w8997 - Actions Semi ATS2851 - QTI WCN6855 - Marvell 88W8997 - Can: - STMicroelectronics bxcan stm32f429 Drivers: - Ethernet NICs: - Intel (1G, icg): - add tracking and reporting of QBV config errors - add support for configuring max SDU for each Tx queue - Intel (100G, ice): - refactor mailbox overflow detection to support Scalable IOV - GNSS interface optimization - Intel (i40e): - support XDP multi-buffer - nVidia/Mellanox: - add the support for linux bridge multicast offload - enable TC offload for egress and engress MACVLAN over bond - add support for VxLAN GBP encap/decap flows offload - extend packet offload to fully support libreswan - support tunnel mode in mlx5 IPsec packet offload - extend XDP multi-buffer support - support MACsec VLAN offload - add support for dynamic msix vectors allocation - drop RX page_cache and fully use page_pool - implement thermal zone to report NIC temperature - Netronome/Corigine: - add support for multi-zone conntrack offload - Solarflare/Xilinx: - support offloading TC VLAN push/pop actions to the MAE - support TC decap rules - support unicast PTP - Other NICs: - Broadcom (bnxt): enforce software based freq adjustments only on shared PHC NIC - RealTek (r8169): refactor to addess ASPM issues during NAPI poll - Micrel (lan8841): add support for PTP_PF_PEROUT - Cadence (macb): enable PTP unicast - Engleder (tsnep): add XDP socket zero-copy support - virtio-net: implement exact header length guest feature - veth: add page_pool support for page recycling - vxlan: add MDB data path support - gve: add XDP support for GQI-QPL format - geneve: accept every ethertype - macvlan: allow some packets to bypass broadcast queue - mana: add support for jumbo frame - Ethernet high-speed switches: - Microchip (sparx5): Add support for TC flower templates - Ethernet embedded switches: - Broadcom (b54): - configure 6318 and 63268 RGMII ports - Marvell (mv88e6xxx): - faster C45 bus scan - Microchip: - lan966x: - add support for IS1 VCAP - better TX/RX from/to CPU performances - ksz9477: add ETS Qdisc support - ksz8: enhance static MAC table operations and error handling - sama7g5: add PTP capability - NXP (ocelot): - add support for external ports - add support for preemptible traffic classes - Texas Instruments: - add CPSWxG SGMII support for J7200 and J721E - Intel WiFi (iwlwifi): - preparation for Wi-Fi 7 EHT and multi-link support - EHT (Wi-Fi 7) sniffer support - hardware timestamping support for some devices/firwmares - TX beacon protection on newer hardware - Qualcomm 802.11ax WiFi (ath11k): - MU-MIMO parameters support - ack signal support for management packets - RealTek WiFi (rtw88): - SDIO bus support - better support for some SDIO devices (e.g. MAC address from efuse) - RealTek WiFi (rtw89): - HW scan support for 8852b - better support for 6 GHz scanning - support for various newer firmware APIs - framework firmware backwards compatibility - MediaTek WiFi (mt76): - P2P support - mesh A-MSDU support - EHT (Wi-Fi 7) support - coredump support" * tag 'net-next-6.4' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (2078 commits) net: phy: hide the PHYLIB_LEDS knob net: phy: marvell-88x2222: remove unnecessary (void*) conversions tcp/udp: Fix memleaks of sk and zerocopy skbs with TX timestamp. net: amd: Fix link leak when verifying config failed net: phy: marvell: Fix inconsistent indenting in led_blink_set lan966x: Don't use xdp_frame when action is XDP_TX tsnep: Add XDP socket zero-copy TX support tsnep: Add XDP socket zero-copy RX support tsnep: Move skb receive action to separate function tsnep: Add functions for queue enable/disable tsnep: Rework TX/RX queue initialization tsnep: Replace modulo operation with mask net: phy: dp83867: Add led_brightness_set support net: phy: Fix reading LED reg property drivers: nfc: nfcsim: remove return value check of `dev_dir` net: phy: dp83867: Remove unnecessary (void*) conversions net: ethtool: coalesce: try to make user settings stick twice net: mana: Check if netdev/napi_alloc_frag returns single page net: mana: Rename mana_refill_rxoob and remove some empty lines net: veth: add page_pool stats ...
Diffstat (limited to 'drivers/ptp/ptp_dfl_tod.c')
-rw-r--r--drivers/ptp/ptp_dfl_tod.c332
1 files changed, 332 insertions, 0 deletions
diff --git a/drivers/ptp/ptp_dfl_tod.c b/drivers/ptp/ptp_dfl_tod.c
new file mode 100644
index 000000000000..f699d541b360
--- /dev/null
+++ b/drivers/ptp/ptp_dfl_tod.c
@@ -0,0 +1,332 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * DFL device driver for Time-of-Day (ToD) private feature
+ *
+ * Copyright (C) 2023 Intel Corporation
+ */
+
+#include <linux/bitfield.h>
+#include <linux/delay.h>
+#include <linux/dfl.h>
+#include <linux/gcd.h>
+#include <linux/iopoll.h>
+#include <linux/module.h>
+#include <linux/ptp_clock_kernel.h>
+#include <linux/spinlock.h>
+#include <linux/units.h>
+
+#define FME_FEATURE_ID_TOD 0x22
+
+/* ToD clock register space. */
+#define TOD_CLK_FREQ 0x038
+
+/*
+ * The read sequence of ToD timestamp registers: TOD_NANOSEC, TOD_SECONDSL and
+ * TOD_SECONDSH, because there is a hardware snapshot whenever the TOD_NANOSEC
+ * register is read.
+ *
+ * The ToD IP requires writing registers in the reverse order to the read sequence.
+ * The timestamp is corrected when the TOD_NANOSEC register is written, so the
+ * sequence of write TOD registers: TOD_SECONDSH, TOD_SECONDSL and TOD_NANOSEC.
+ */
+#define TOD_SECONDSH 0x100
+#define TOD_SECONDSL 0x104
+#define TOD_NANOSEC 0x108
+#define TOD_PERIOD 0x110
+#define TOD_ADJUST_PERIOD 0x114
+#define TOD_ADJUST_COUNT 0x118
+#define TOD_DRIFT_ADJUST 0x11c
+#define TOD_DRIFT_ADJUST_RATE 0x120
+#define PERIOD_FRAC_OFFSET 16
+#define SECONDS_MSB GENMASK_ULL(47, 32)
+#define SECONDS_LSB GENMASK_ULL(31, 0)
+#define TOD_SECONDSH_SEC_MSB GENMASK_ULL(15, 0)
+
+#define CAL_SECONDS(m, l) ((FIELD_GET(TOD_SECONDSH_SEC_MSB, (m)) << 32) | (l))
+
+#define TOD_PERIOD_MASK GENMASK_ULL(19, 0)
+#define TOD_PERIOD_MAX FIELD_MAX(TOD_PERIOD_MASK)
+#define TOD_PERIOD_MIN 0
+#define TOD_DRIFT_ADJUST_MASK GENMASK_ULL(15, 0)
+#define TOD_DRIFT_ADJUST_FNS_MAX FIELD_MAX(TOD_DRIFT_ADJUST_MASK)
+#define TOD_DRIFT_ADJUST_RATE_MAX TOD_DRIFT_ADJUST_FNS_MAX
+#define TOD_ADJUST_COUNT_MASK GENMASK_ULL(19, 0)
+#define TOD_ADJUST_COUNT_MAX FIELD_MAX(TOD_ADJUST_COUNT_MASK)
+#define TOD_ADJUST_INTERVAL_US 10
+#define TOD_ADJUST_MS \
+ (((TOD_PERIOD_MAX >> 16) + 1) * (TOD_ADJUST_COUNT_MAX + 1))
+#define TOD_ADJUST_MS_MAX (TOD_ADJUST_MS / MICRO)
+#define TOD_ADJUST_MAX_US (TOD_ADJUST_MS_MAX * USEC_PER_MSEC)
+#define TOD_MAX_ADJ (500 * MEGA)
+
+struct dfl_tod {
+ struct ptp_clock_info ptp_clock_ops;
+ struct device *dev;
+ struct ptp_clock *ptp_clock;
+
+ /* ToD Clock address space */
+ void __iomem *tod_ctrl;
+
+ /* ToD clock registers protection */
+ spinlock_t tod_lock;
+};
+
+/*
+ * A fine ToD HW clock offset adjustment. To perform the fine offset adjustment, the
+ * adjust_period and adjust_count argument are used to update the TOD_ADJUST_PERIOD
+ * and TOD_ADJUST_COUNT register for in hardware. The dt->tod_lock spinlock must be
+ * held when calling this function.
+ */
+static int fine_adjust_tod_clock(struct dfl_tod *dt, u32 adjust_period,
+ u32 adjust_count)
+{
+ void __iomem *base = dt->tod_ctrl;
+ u32 val;
+
+ writel(adjust_period, base + TOD_ADJUST_PERIOD);
+ writel(adjust_count, base + TOD_ADJUST_COUNT);
+
+ /* Wait for present offset adjustment update to complete */
+ return readl_poll_timeout_atomic(base + TOD_ADJUST_COUNT, val, !val, TOD_ADJUST_INTERVAL_US,
+ TOD_ADJUST_MAX_US);
+}
+
+/*
+ * A coarse ToD HW clock offset adjustment. The coarse time adjustment performs by
+ * adding or subtracting the delta value from the current ToD HW clock time.
+ */
+static int coarse_adjust_tod_clock(struct dfl_tod *dt, s64 delta)
+{
+ u32 seconds_msb, seconds_lsb, nanosec;
+ void __iomem *base = dt->tod_ctrl;
+ u64 seconds, now;
+
+ if (delta == 0)
+ return 0;
+
+ nanosec = readl(base + TOD_NANOSEC);
+ seconds_lsb = readl(base + TOD_SECONDSL);
+ seconds_msb = readl(base + TOD_SECONDSH);
+
+ /* Calculate new time */
+ seconds = CAL_SECONDS(seconds_msb, seconds_lsb);
+ now = seconds * NSEC_PER_SEC + nanosec + delta;
+
+ seconds = div_u64_rem(now, NSEC_PER_SEC, &nanosec);
+ seconds_msb = FIELD_GET(SECONDS_MSB, seconds);
+ seconds_lsb = FIELD_GET(SECONDS_LSB, seconds);
+
+ writel(seconds_msb, base + TOD_SECONDSH);
+ writel(seconds_lsb, base + TOD_SECONDSL);
+ writel(nanosec, base + TOD_NANOSEC);
+
+ return 0;
+}
+
+static int dfl_tod_adjust_fine(struct ptp_clock_info *ptp, long scaled_ppm)
+{
+ struct dfl_tod *dt = container_of(ptp, struct dfl_tod, ptp_clock_ops);
+ u32 tod_period, tod_rem, tod_drift_adjust_fns, tod_drift_adjust_rate;
+ void __iomem *base = dt->tod_ctrl;
+ unsigned long flags, rate;
+ u64 ppb;
+
+ /* Get the clock rate from clock frequency register offset */
+ rate = readl(base + TOD_CLK_FREQ);
+
+ /* add GIGA as nominal ppb */
+ ppb = scaled_ppm_to_ppb(scaled_ppm) + GIGA;
+
+ tod_period = div_u64_rem(ppb << PERIOD_FRAC_OFFSET, rate, &tod_rem);
+ if (tod_period > TOD_PERIOD_MAX)
+ return -ERANGE;
+
+ /*
+ * The drift of ToD adjusted periodically by adding a drift_adjust_fns
+ * correction value every drift_adjust_rate count of clock cycles.
+ */
+ tod_drift_adjust_fns = tod_rem / gcd(tod_rem, rate);
+ tod_drift_adjust_rate = rate / gcd(tod_rem, rate);
+
+ while ((tod_drift_adjust_fns > TOD_DRIFT_ADJUST_FNS_MAX) ||
+ (tod_drift_adjust_rate > TOD_DRIFT_ADJUST_RATE_MAX)) {
+ tod_drift_adjust_fns >>= 1;
+ tod_drift_adjust_rate >>= 1;
+ }
+
+ if (tod_drift_adjust_fns == 0)
+ tod_drift_adjust_rate = 0;
+
+ spin_lock_irqsave(&dt->tod_lock, flags);
+ writel(tod_period, base + TOD_PERIOD);
+ writel(0, base + TOD_ADJUST_PERIOD);
+ writel(0, base + TOD_ADJUST_COUNT);
+ writel(tod_drift_adjust_fns, base + TOD_DRIFT_ADJUST);
+ writel(tod_drift_adjust_rate, base + TOD_DRIFT_ADJUST_RATE);
+ spin_unlock_irqrestore(&dt->tod_lock, flags);
+
+ return 0;
+}
+
+static int dfl_tod_adjust_time(struct ptp_clock_info *ptp, s64 delta)
+{
+ struct dfl_tod *dt = container_of(ptp, struct dfl_tod, ptp_clock_ops);
+ u32 period, diff, rem, rem_period, adj_period;
+ void __iomem *base = dt->tod_ctrl;
+ unsigned long flags;
+ bool neg_adj;
+ u64 count;
+ int ret;
+
+ neg_adj = delta < 0;
+ if (neg_adj)
+ delta = -delta;
+
+ spin_lock_irqsave(&dt->tod_lock, flags);
+
+ /*
+ * Get the maximum possible value of the Period register offset
+ * adjustment in nanoseconds scale. This depends on the current
+ * Period register setting and the maximum and minimum possible
+ * values of the Period register.
+ */
+ period = readl(base + TOD_PERIOD);
+
+ if (neg_adj) {
+ diff = (period - TOD_PERIOD_MIN) >> PERIOD_FRAC_OFFSET;
+ adj_period = period - (diff << PERIOD_FRAC_OFFSET);
+ count = div_u64_rem(delta, diff, &rem);
+ rem_period = period - (rem << PERIOD_FRAC_OFFSET);
+ } else {
+ diff = (TOD_PERIOD_MAX - period) >> PERIOD_FRAC_OFFSET;
+ adj_period = period + (diff << PERIOD_FRAC_OFFSET);
+ count = div_u64_rem(delta, diff, &rem);
+ rem_period = period + (rem << PERIOD_FRAC_OFFSET);
+ }
+
+ ret = 0;
+
+ if (count > TOD_ADJUST_COUNT_MAX) {
+ ret = coarse_adjust_tod_clock(dt, delta);
+ } else {
+ /* Adjust the period by count cycles to adjust the time */
+ if (count)
+ ret = fine_adjust_tod_clock(dt, adj_period, count);
+
+ /* If there is a remainder, adjust the period for an additional cycle */
+ if (rem)
+ ret = fine_adjust_tod_clock(dt, rem_period, 1);
+ }
+
+ spin_unlock_irqrestore(&dt->tod_lock, flags);
+
+ return ret;
+}
+
+static int dfl_tod_get_timex(struct ptp_clock_info *ptp, struct timespec64 *ts,
+ struct ptp_system_timestamp *sts)
+{
+ struct dfl_tod *dt = container_of(ptp, struct dfl_tod, ptp_clock_ops);
+ u32 seconds_msb, seconds_lsb, nanosec;
+ void __iomem *base = dt->tod_ctrl;
+ unsigned long flags;
+ u64 seconds;
+
+ spin_lock_irqsave(&dt->tod_lock, flags);
+ ptp_read_system_prets(sts);
+ nanosec = readl(base + TOD_NANOSEC);
+ seconds_lsb = readl(base + TOD_SECONDSL);
+ seconds_msb = readl(base + TOD_SECONDSH);
+ ptp_read_system_postts(sts);
+ spin_unlock_irqrestore(&dt->tod_lock, flags);
+
+ seconds = CAL_SECONDS(seconds_msb, seconds_lsb);
+
+ ts->tv_nsec = nanosec;
+ ts->tv_sec = seconds;
+
+ return 0;
+}
+
+static int dfl_tod_set_time(struct ptp_clock_info *ptp,
+ const struct timespec64 *ts)
+{
+ struct dfl_tod *dt = container_of(ptp, struct dfl_tod, ptp_clock_ops);
+ u32 seconds_msb = FIELD_GET(SECONDS_MSB, ts->tv_sec);
+ u32 seconds_lsb = FIELD_GET(SECONDS_LSB, ts->tv_sec);
+ u32 nanosec = FIELD_GET(SECONDS_LSB, ts->tv_nsec);
+ void __iomem *base = dt->tod_ctrl;
+ unsigned long flags;
+
+ spin_lock_irqsave(&dt->tod_lock, flags);
+ writel(seconds_msb, base + TOD_SECONDSH);
+ writel(seconds_lsb, base + TOD_SECONDSL);
+ writel(nanosec, base + TOD_NANOSEC);
+ spin_unlock_irqrestore(&dt->tod_lock, flags);
+
+ return 0;
+}
+
+static struct ptp_clock_info dfl_tod_clock_ops = {
+ .owner = THIS_MODULE,
+ .name = "dfl_tod",
+ .max_adj = TOD_MAX_ADJ,
+ .adjfine = dfl_tod_adjust_fine,
+ .adjtime = dfl_tod_adjust_time,
+ .gettimex64 = dfl_tod_get_timex,
+ .settime64 = dfl_tod_set_time,
+};
+
+static int dfl_tod_probe(struct dfl_device *ddev)
+{
+ struct device *dev = &ddev->dev;
+ struct dfl_tod *dt;
+
+ dt = devm_kzalloc(dev, sizeof(*dt), GFP_KERNEL);
+ if (!dt)
+ return -ENOMEM;
+
+ dt->tod_ctrl = devm_ioremap_resource(dev, &ddev->mmio_res);
+ if (IS_ERR(dt->tod_ctrl))
+ return PTR_ERR(dt->tod_ctrl);
+
+ dt->dev = dev;
+ spin_lock_init(&dt->tod_lock);
+ dev_set_drvdata(dev, dt);
+
+ dt->ptp_clock_ops = dfl_tod_clock_ops;
+
+ dt->ptp_clock = ptp_clock_register(&dt->ptp_clock_ops, dev);
+ if (IS_ERR(dt->ptp_clock))
+ return dev_err_probe(dt->dev, PTR_ERR(dt->ptp_clock),
+ "Unable to register PTP clock\n");
+
+ return 0;
+}
+
+static void dfl_tod_remove(struct dfl_device *ddev)
+{
+ struct dfl_tod *dt = dev_get_drvdata(&ddev->dev);
+
+ ptp_clock_unregister(dt->ptp_clock);
+}
+
+static const struct dfl_device_id dfl_tod_ids[] = {
+ { FME_ID, FME_FEATURE_ID_TOD },
+ { }
+};
+MODULE_DEVICE_TABLE(dfl, dfl_tod_ids);
+
+static struct dfl_driver dfl_tod_driver = {
+ .drv = {
+ .name = "dfl-tod",
+ },
+ .id_table = dfl_tod_ids,
+ .probe = dfl_tod_probe,
+ .remove = dfl_tod_remove,
+};
+module_dfl_driver(dfl_tod_driver);
+
+MODULE_DESCRIPTION("FPGA DFL ToD driver");
+MODULE_AUTHOR("Intel Corporation");
+MODULE_LICENSE("GPL");