Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-nextgrafted

Pull networking updates from Jakub Kicinski:
 "Core:

   - Add dedicated kmem_cache for typical/small skb->head, avoid having
     to access struct page at kfree time, and improve memory use.

   - Introduce sysctl to set default RPS configuration for new netdevs.

   - Define Netlink protocol specification format which can be used to
     describe messages used by each family and auto-generate parsers.
     Add tools for generating kernel data structures and uAPI headers.

   - Expose all net/core sysctls inside netns.

   - Remove 4s sleep in netpoll if carrier is instantly detected on
     boot.

   - Add configurable limit of MDB entries per port, and port-vlan.

   - Continue populating drop reasons throughout the stack.

   - Retire a handful of legacy Qdiscs and classifiers.

  Protocols:

   - Support IPv4 big TCP (TSO frames larger than 64kB).

   - Add IP_LOCAL_PORT_RANGE socket option, to control local port range
     on socket by socket basis.

   - Track and report in procfs number of MPTCP sockets used.

   - Support mixing IPv4 and IPv6 flows in the in-kernel MPTCP path
     manager.

   - IPv6: don't check net.ipv6.route.max_size and rely on garbage
     collection to free memory (similarly to IPv4).

   - Support Penultimate Segment Pop (PSP) flavor in SRv6 (RFC8986).

   - ICMP: add per-rate limit counters.

   - Add support for user scanning requests in ieee802154.

   - Remove static WEP support.

   - Support minimal Wi-Fi 7 Extremely High Throughput (EHT) rate
     reporting.

   - WiFi 7 EHT channel puncturing support (client & AP).

  BPF:

   - Add a rbtree data structure following the "next-gen data structure"
     precedent set by recently added linked list, that is, by using
     kfunc + kptr instead of adding a new BPF map type.

   - Expose XDP hints via kfuncs with initial support for RX hash and
     timestamp metadata.

   - Add BPF_F_NO_TUNNEL_KEY extension to bpf_skb_set_tunnel_key to
     better support decap on GRE tunnel devices not operating in collect
     metadata.

   - Improve x86 JIT's codegen for PROBE_MEM runtime error checks.

   - Remove the need for trace_printk_lock for bpf_trace_printk and
     bpf_trace_vprintk helpers.

   - Extend libbpf's bpf_tracing.h support for tracing arguments of
     kprobes/uprobes and syscall as a special case.

   - Significantly reduce the search time for module symbols by
     livepatch and BPF.

   - Enable cpumasks to be used as kptrs, which is useful for tracing
     programs tracking which tasks end up running on which CPUs in
     different time intervals.

   - Add support for BPF trampoline on s390x and riscv64.

   - Add capability to export the XDP features supported by the NIC.

   - Add __bpf_kfunc tag for marking kernel functions as kfuncs.

   - Add cgroup.memory=nobpf kernel parameter option to disable BPF
     memory accounting for container environments.

  Netfilter:

   - Remove the CLUSTERIP target. It has been marked as obsolete for
     years, and we still have WARN splats wrt races of the out-of-band
     /proc interface installed by this target.

   - Add 'destroy' commands to nf_tables. They are identical to the
     existing 'delete' commands, but do not return an error if the
     referenced object (set, chain, rule...) did not exist.

  Driver API:

   - Improve cpumask_local_spread() locality to help NICs set the right
     IRQ affinity on AMD platforms.

   - Separate C22 and C45 MDIO bus transactions more clearly.

   - Introduce new DCB table to control DSCP rewrite on egress.

   - Support configuration of Physical Layer Collision Avoidance (PLCA)
     Reconciliation Sublayer (RS) (802.3cg-2019). Modern version of
     shared medium Ethernet.

   - Support for MAC Merge layer (IEEE 802.3-2018 clause 99). Allowing
     preemption of low priority frames by high priority frames.

   - Add support for controlling MACSec offload using netlink SET.

   - Rework devlink instance refcounts to allow registration and
     de-registration under the instance lock. Split the code into
     multiple files, drop some of the unnecessarily granular locks and
     factor out common parts of netlink operation handling.

   - Add TX frame aggregation parameters (for USB drivers).

   - Add a new attr TCA_EXT_WARN_MSG to report TC (offload) warning
     messages with notifications for debug.

   - Allow offloading of UDP NEW connections via act_ct.

   - Add support for per action HW stats in TC.

   - Support hardware miss to TC action (continue processing in SW from
     a specific point in the action chain).

   - Warn if old Wireless Extension user space interface is used with
     modern cfg80211/mac80211 drivers. Do not support Wireless
     Extensions for Wi-Fi 7 devices at all. Everyone should switch to
     using nl80211 interface instead.

   - Improve the CAN bit timing configuration. Use extack to return
     error messages directly to user space, update the SJW handling,
     including the definition of a new default value that will benefit
     CAN-FD controllers, by increasing their oscillator tolerance.

  New hardware / drivers:

   - Ethernet:
      - nVidia BlueField-3 support (control traffic driver)
      - Ethernet support for imx93 SoCs
      - Motorcomm yt8531 gigabit Ethernet PHY
      - onsemi NCN26000 10BASE-T1S PHY (with support for PLCA)
      - Microchip LAN8841 PHY (incl. cable diagnostics and PTP)
      - Amlogic gxl MDIO mux

   - WiFi:
      - RealTek RTL8188EU (rtl8xxxu)
      - Qualcomm Wi-Fi 7 devices (ath12k)

   - CAN:
      - Renesas R-Car V4H

  Drivers:

   - Bluetooth:
      - Set Per Platform Antenna Gain (PPAG) for Intel controllers.

   - Ethernet NICs:
      - Intel (1G, igc):
         - support TSN / Qbv / packet scheduling features of i226 model
      - Intel (100G, ice):
         - use GNSS subsystem instead of TTY
         - multi-buffer XDP support
         - extend support for GPIO pins to E823 devices
      - nVidia/Mellanox:
         - update the shared buffer configuration on PFC commands
         - implement PTP adjphase function for HW offset control
         - TC support for Geneve and GRE with VF tunnel offload
         - more efficient crypto key management method
         - multi-port eswitch support
      - Netronome/Corigine:
         - add DCB IEEE support
         - support IPsec offloading for NFP3800
      - Freescale/NXP (enetc):
         - support XDP_REDIRECT for XDP non-linear buffers
         - improve reconfig, avoid link flap and waiting for idle
         - support MAC Merge layer
      - Other NICs:
         - sfc/ef100: add basic devlink support for ef100
         - ionic: rx_push mode operation (writing descriptors via MMIO)
         - bnxt: use the auxiliary bus abstraction for RDMA
         - r8169: disable ASPM and reset bus in case of tx timeout
         - cpsw: support QSGMII mode for J721e CPSW9G
         - cpts: support pulse-per-second output
         - ngbe: add an mdio bus driver
         - usbnet: optimize usbnet_bh() by avoiding unnecessary queuing
         - r8152: handle devices with FW with NCM support
         - amd-xgbe: support 10Mbps, 2.5GbE speeds and rx-adaptation
         - virtio-net: support multi buffer XDP
         - virtio/vsock: replace virtio_vsock_pkt with sk_buff
         - tsnep: XDP support

   - Ethernet high-speed switches:
      - nVidia/Mellanox (mlxsw):
         - add support for latency TLV (in FW control messages)
      - Microchip (sparx5):
         - separate explicit and implicit traffic forwarding rules, make
           the implicit rules always active
         - add support for egress DSCP rewrite
         - IS0 VCAP support (Ingress Classification)
         - IS2 VCAP filters (protos, L3 addrs, L4 ports, flags, ToS
           etc.)
         - ES2 VCAP support (Egress Access Control)
         - support for Per-Stream Filtering and Policing (802.1Q,
           8.6.5.1)

   - Ethernet embedded switches:
      - Marvell (mv88e6xxx):
         - add MAB (port auth) offload support
         - enable PTP receive for mv88e6390
      - NXP (ocelot):
         - support MAC Merge layer
         - support for the the vsc7512 internal copper phys
      - Microchip:
         - lan9303: convert to PHYLINK
         - lan966x: support TC flower filter statistics
         - lan937x: PTP support for KSZ9563/KSZ8563 and LAN937x
         - lan937x: support Credit Based Shaper configuration
         - ksz9477: support Energy Efficient Ethernet
      - other:
         - qca8k: convert to regmap read/write API, use bulk operations
         - rswitch: Improve TX timestamp accuracy

   - Intel WiFi (iwlwifi):
      - EHT (Wi-Fi 7) rate reporting
      - STEP equalizer support: transfer some STEP (connection to radio
        on platforms with integrated wifi) related parameters from the
        BIOS to the firmware.

   - Qualcomm 802.11ax WiFi (ath11k):
      - IPQ5018 support
      - Fine Timing Measurement (FTM) responder role support
      - channel 177 support

   - MediaTek WiFi (mt76):
      - per-PHY LED support
      - mt7996: EHT (Wi-Fi 7) support
      - Wireless Ethernet Dispatch (WED) reset support
      - switch to using page pool allocator

   - RealTek WiFi (rtw89):
      - support new version of Bluetooth co-existance

   - Mobile:
      - rmnet: support TX aggregation"

* tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1872 commits)
  page_pool: add a comment explaining the fragment counter usage
  net: ethtool: fix __ethtool_dev_mm_supported() implementation
  ethtool: pse-pd: Fix double word in comments
  xsk: add linux/vmalloc.h to xsk.c
  sefltests: netdevsim: wait for devlink instance after netns removal
  selftest: fib_tests: Always cleanup before exit
  net/mlx5e: Align IPsec ASO result memory to be as required by hardware
  net/mlx5e: TC, Set CT miss to the specific ct action instance
  net/mlx5e: Rename CHAIN_TO_REG to MAPPED_OBJ_TO_REG
  net/mlx5: Refactor tc miss handling to a single function
  net/mlx5: Kconfig: Make tc offload depend on tc skb extension
  net/sched: flower: Support hardware miss to tc action
  net/sched: flower: Move filter handle initialization earlier
  net/sched: cls_api: Support hardware miss to tc action
  net/sched: Rename user cookie and act cookie
  sfc: fix builds without CONFIG_RTC_LIB
  sfc: clean up some inconsistent indentings
  net/mlx4_en: Introduce flexible array to silence overflow warning
  net: lan966x: Fix possible deadlock inside PTP
  net/ulp: Remove redundant ->clone() test in inet_clone_ulp().
  ...

1 files changed, 377 insertions, 0 deletions

diff --git a/drivers/clk/zynqmp/divider.c b/drivers/clk/zynqmp/divider.c
new file mode 100644
index 000000000..33a3b2a22
--- /dev/null
+++ b/drivers/clk/zynqmp/divider.c
@@ -0,0 +1,377 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Zynq UltraScale+ MPSoC Divider support
+ *
+ *  Copyright (C) 2016-2019 Xilinx
+ *
+ * Adjustable divider clock implementation
+ */
+
+#include <linux/clk.h>
+#include <linux/clk-provider.h>
+#include <linux/slab.h>
+#include "clk-zynqmp.h"
+
+/*
+ * DOC: basic adjustable divider clock that cannot gate
+ *
+ * Traits of this clock:
+ * prepare - clk_prepare only ensures that parents are prepared
+ * enable - clk_enable only ensures that parents are enabled
+ * rate - rate is adjustable.  clk->rate = ceiling(parent->rate / divisor)
+ * parent - fixed parent.  No clk_set_parent support
+ */
+
+#define to_zynqmp_clk_divider(_hw)		\
+	container_of(_hw, struct zynqmp_clk_divider, hw)
+
+#define CLK_FRAC		BIT(13) /* has a fractional parent */
+#define CUSTOM_FLAG_CLK_FRAC	BIT(0) /* has a fractional parent in custom type flag */
+
+/**
+ * struct zynqmp_clk_divider - adjustable divider clock
+ * @hw:		handle between common and hardware-specific interfaces
+ * @flags:	Hardware specific flags
+ * @is_frac:	The divider is a fractional divider
+ * @clk_id:	Id of clock
+ * @div_type:	divisor type (TYPE_DIV1 or TYPE_DIV2)
+ * @max_div:	maximum supported divisor (fetched from firmware)
+ */
+struct zynqmp_clk_divider {
+	struct clk_hw hw;
+	u8 flags;
+	bool is_frac;
+	u32 clk_id;
+	u32 div_type;
+	u16 max_div;
+};
+
+static inline int zynqmp_divider_get_val(unsigned long parent_rate,
+					 unsigned long rate, u16 flags)
+{
+	int up, down;
+	unsigned long up_rate, down_rate;
+
+	if (flags & CLK_DIVIDER_POWER_OF_TWO) {
+		up = DIV_ROUND_UP_ULL((u64)parent_rate, rate);
+		down = DIV_ROUND_DOWN_ULL((u64)parent_rate, rate);
+
+		up = __roundup_pow_of_two(up);
+		down = __rounddown_pow_of_two(down);
+
+		up_rate = DIV_ROUND_UP_ULL((u64)parent_rate, up);
+		down_rate = DIV_ROUND_UP_ULL((u64)parent_rate, down);
+
+		return (rate - up_rate) <= (down_rate - rate) ? up : down;
+
+	} else {
+		return DIV_ROUND_CLOSEST(parent_rate, rate);
+	}
+}
+
+/**
+ * zynqmp_clk_divider_recalc_rate() - Recalc rate of divider clock
+ * @hw:			handle between common and hardware-specific interfaces
+ * @parent_rate:	rate of parent clock
+ *
+ * Return: 0 on success else error+reason
+ */
+static unsigned long zynqmp_clk_divider_recalc_rate(struct clk_hw *hw,
+						    unsigned long parent_rate)
+{
+	struct zynqmp_clk_divider *divider = to_zynqmp_clk_divider(hw);
+	const char *clk_name = clk_hw_get_name(hw);
+	u32 clk_id = divider->clk_id;
+	u32 div_type = divider->div_type;
+	u32 div, value;
+	int ret;
+
+	ret = zynqmp_pm_clock_getdivider(clk_id, &div);
+
+	if (ret)
+		pr_debug("%s() get divider failed for %s, ret = %d\n",
+			 __func__, clk_name, ret);
+
+	if (div_type == TYPE_DIV1)
+		value = div & 0xFFFF;
+	else
+		value = div >> 16;
+
+	if (divider->flags & CLK_DIVIDER_POWER_OF_TWO)
+		value = 1 << value;
+
+	if (!value) {
+		WARN(!(divider->flags & CLK_DIVIDER_ALLOW_ZERO),
+		     "%s: Zero divisor and CLK_DIVIDER_ALLOW_ZERO not set\n",
+		     clk_name);
+		return parent_rate;
+	}
+
+	return DIV_ROUND_UP_ULL(parent_rate, value);
+}
+
+static void zynqmp_get_divider2_val(struct clk_hw *hw,
+				    unsigned long rate,
+				    struct zynqmp_clk_divider *divider,
+				    u32 *bestdiv)
+{
+	int div1;
+	int div2;
+	long error = LONG_MAX;
+	unsigned long div1_prate;
+	struct clk_hw *div1_parent_hw;
+	struct zynqmp_clk_divider *pdivider;
+	struct clk_hw *div2_parent_hw = clk_hw_get_parent(hw);
+
+	if (!div2_parent_hw)
+		return;
+
+	pdivider = to_zynqmp_clk_divider(div2_parent_hw);
+	if (!pdivider)
+		return;
+
+	div1_parent_hw = clk_hw_get_parent(div2_parent_hw);
+	if (!div1_parent_hw)
+		return;
+
+	div1_prate = clk_hw_get_rate(div1_parent_hw);
+	*bestdiv = 1;
+	for (div1 = 1; div1 <= pdivider->max_div;) {
+		for (div2 = 1; div2 <= divider->max_div;) {
+			long new_error = ((div1_prate / div1) / div2) - rate;
+
+			if (abs(new_error) < abs(error)) {
+				*bestdiv = div2;
+				error = new_error;
+			}
+			if (divider->flags & CLK_DIVIDER_POWER_OF_TWO)
+				div2 = div2 << 1;
+			else
+				div2++;
+		}
+		if (pdivider->flags & CLK_DIVIDER_POWER_OF_TWO)
+			div1 = div1 << 1;
+		else
+			div1++;
+	}
+}
+
+/**
+ * zynqmp_clk_divider_round_rate() - Round rate of divider clock
+ * @hw:			handle between common and hardware-specific interfaces
+ * @rate:		rate of clock to be set
+ * @prate:		rate of parent clock
+ *
+ * Return: 0 on success else error+reason
+ */
+static long zynqmp_clk_divider_round_rate(struct clk_hw *hw,
+					  unsigned long rate,
+					  unsigned long *prate)
+{
+	struct zynqmp_clk_divider *divider = to_zynqmp_clk_divider(hw);
+	const char *clk_name = clk_hw_get_name(hw);
+	u32 clk_id = divider->clk_id;
+	u32 div_type = divider->div_type;
+	u32 bestdiv;
+	int ret;
+
+	/* if read only, just return current value */
+	if (divider->flags & CLK_DIVIDER_READ_ONLY) {
+		ret = zynqmp_pm_clock_getdivider(clk_id, &bestdiv);
+
+		if (ret)
+			pr_debug("%s() get divider failed for %s, ret = %d\n",
+				 __func__, clk_name, ret);
+		if (div_type == TYPE_DIV1)
+			bestdiv = bestdiv & 0xFFFF;
+		else
+			bestdiv  = bestdiv >> 16;
+
+		if (divider->flags & CLK_DIVIDER_POWER_OF_TWO)
+			bestdiv = 1 << bestdiv;
+
+		return DIV_ROUND_UP_ULL((u64)*prate, bestdiv);
+	}
+
+	bestdiv = zynqmp_divider_get_val(*prate, rate, divider->flags);
+
+	/*
+	 * In case of two divisors, compute best divider values and return
+	 * divider2 value based on compute value. div1 will  be automatically
+	 * set to optimum based on required total divider value.
+	 */
+	if (div_type == TYPE_DIV2 &&
+	    (clk_hw_get_flags(hw) & CLK_SET_RATE_PARENT)) {
+		zynqmp_get_divider2_val(hw, rate, divider, &bestdiv);
+	}
+
+	if ((clk_hw_get_flags(hw) & CLK_SET_RATE_PARENT) && divider->is_frac)
+		bestdiv = rate % *prate ? 1 : bestdiv;
+
+	bestdiv = min_t(u32, bestdiv, divider->max_div);
+	*prate = rate * bestdiv;
+
+	return rate;
+}
+
+/**
+ * zynqmp_clk_divider_set_rate() - Set rate of divider clock
+ * @hw:			handle between common and hardware-specific interfaces
+ * @rate:		rate of clock to be set
+ * @parent_rate:	rate of parent clock
+ *
+ * Return: 0 on success else error+reason
+ */
+static int zynqmp_clk_divider_set_rate(struct clk_hw *hw, unsigned long rate,
+				       unsigned long parent_rate)
+{
+	struct zynqmp_clk_divider *divider = to_zynqmp_clk_divider(hw);
+	const char *clk_name = clk_hw_get_name(hw);
+	u32 clk_id = divider->clk_id;
+	u32 div_type = divider->div_type;
+	u32 value, div;
+	int ret;
+
+	value = zynqmp_divider_get_val(parent_rate, rate, divider->flags);
+	if (div_type == TYPE_DIV1) {
+		div = value & 0xFFFF;
+		div |= 0xffff << 16;
+	} else {
+		div = 0xffff;
+		div |= value << 16;
+	}
+
+	if (divider->flags & CLK_DIVIDER_POWER_OF_TWO)
+		div = __ffs(div);
+
+	ret = zynqmp_pm_clock_setdivider(clk_id, div);
+
+	if (ret)
+		pr_debug("%s() set divider failed for %s, ret = %d\n",
+			 __func__, clk_name, ret);
+
+	return ret;
+}
+
+static const struct clk_ops zynqmp_clk_divider_ops = {
+	.recalc_rate = zynqmp_clk_divider_recalc_rate,
+	.round_rate = zynqmp_clk_divider_round_rate,
+	.set_rate = zynqmp_clk_divider_set_rate,
+};
+
+static const struct clk_ops zynqmp_clk_divider_ro_ops = {
+	.recalc_rate = zynqmp_clk_divider_recalc_rate,
+	.round_rate = zynqmp_clk_divider_round_rate,
+};
+
+/**
+ * zynqmp_clk_get_max_divisor() - Get maximum supported divisor from firmware.
+ * @clk_id:		Id of clock
+ * @type:		Divider type
+ *
+ * Return: Maximum divisor of a clock if query data is successful
+ *	   U16_MAX in case of query data is not success
+ */
+static u32 zynqmp_clk_get_max_divisor(u32 clk_id, u32 type)
+{
+	struct zynqmp_pm_query_data qdata = {0};
+	u32 ret_payload[PAYLOAD_ARG_CNT];
+	int ret;
+
+	qdata.qid = PM_QID_CLOCK_GET_MAX_DIVISOR;
+	qdata.arg1 = clk_id;
+	qdata.arg2 = type;
+	ret = zynqmp_pm_query_data(qdata, ret_payload);
+	/*
+	 * To maintain backward compatibility return maximum possible value
+	 * (0xFFFF) if query for max divisor is not successful.
+	 */
+	if (ret)
+		return U16_MAX;
+
+	return ret_payload[1];
+}
+
+static inline unsigned long zynqmp_clk_map_divider_ccf_flags(
+					       const u32 zynqmp_type_flag)
+{
+	unsigned long ccf_flag = 0;
+
+	if (zynqmp_type_flag & ZYNQMP_CLK_DIVIDER_ONE_BASED)
+		ccf_flag |= CLK_DIVIDER_ONE_BASED;
+	if (zynqmp_type_flag & ZYNQMP_CLK_DIVIDER_POWER_OF_TWO)
+		ccf_flag |= CLK_DIVIDER_POWER_OF_TWO;
+	if (zynqmp_type_flag & ZYNQMP_CLK_DIVIDER_ALLOW_ZERO)
+		ccf_flag |= CLK_DIVIDER_ALLOW_ZERO;
+	if (zynqmp_type_flag & ZYNQMP_CLK_DIVIDER_POWER_OF_TWO)
+		ccf_flag |= CLK_DIVIDER_HIWORD_MASK;
+	if (zynqmp_type_flag & ZYNQMP_CLK_DIVIDER_ROUND_CLOSEST)
+		ccf_flag |= CLK_DIVIDER_ROUND_CLOSEST;
+	if (zynqmp_type_flag & ZYNQMP_CLK_DIVIDER_READ_ONLY)
+		ccf_flag |= CLK_DIVIDER_READ_ONLY;
+	if (zynqmp_type_flag & ZYNQMP_CLK_DIVIDER_MAX_AT_ZERO)
+		ccf_flag |= CLK_DIVIDER_MAX_AT_ZERO;
+
+	return ccf_flag;
+}
+
+/**
+ * zynqmp_clk_register_divider() - Register a divider clock
+ * @name:		Name of this clock
+ * @clk_id:		Id of clock
+ * @parents:		Name of this clock's parents
+ * @num_parents:	Number of parents
+ * @nodes:		Clock topology node
+ *
+ * Return: clock hardware to registered clock divider
+ */
+struct clk_hw *zynqmp_clk_register_divider(const char *name,
+					   u32 clk_id,
+					   const char * const *parents,
+					   u8 num_parents,
+					   const struct clock_topology *nodes)
+{
+	struct zynqmp_clk_divider *div;
+	struct clk_hw *hw;
+	struct clk_init_data init;
+	int ret;
+
+	/* allocate the divider */
+	div = kzalloc(sizeof(*div), GFP_KERNEL);
+	if (!div)
+		return ERR_PTR(-ENOMEM);
+
+	init.name = name;
+	if (nodes->type_flag & CLK_DIVIDER_READ_ONLY)
+		init.ops = &zynqmp_clk_divider_ro_ops;
+	else
+		init.ops = &zynqmp_clk_divider_ops;
+
+	init.flags = zynqmp_clk_map_common_ccf_flags(nodes->flag);
+
+	init.parent_names = parents;
+	init.num_parents = 1;
+
+	/* struct clk_divider assignments */
+	div->is_frac = !!((nodes->flag & CLK_FRAC) |
+			  (nodes->custom_type_flag & CUSTOM_FLAG_CLK_FRAC));
+	div->flags = zynqmp_clk_map_divider_ccf_flags(nodes->type_flag);
+	div->hw.init = &init;
+	div->clk_id = clk_id;
+	div->div_type = nodes->type;
+
+	/*
+	 * To achieve best possible rate, maximum limit of divider is required
+	 * while computation.
+	 */
+	div->max_div = zynqmp_clk_get_max_divisor(clk_id, nodes->type);
+
+	hw = &div->hw;
+	ret = clk_hw_register(NULL, hw);
+	if (ret) {
+		kfree(div);
+		hw = ERR_PTR(ret);
+	}
+
+	return hw;
+}