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, 582 insertions, 0 deletions

diff --git a/drivers/rtc/rtc-hym8563.c b/drivers/rtc/rtc-hym8563.c
new file mode 100644
index 000000000..cc710d682
--- /dev/null
+++ b/drivers/rtc/rtc-hym8563.c
@@ -0,0 +1,582 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Haoyu HYM8563 RTC driver
+ *
+ * Copyright (C) 2013 MundoReader S.L.
+ * Author: Heiko Stuebner <heiko@sntech.de>
+ *
+ * based on rtc-HYM8563
+ * Copyright (C) 2010 ROCKCHIP, Inc.
+ */
+
+#include <linux/module.h>
+#include <linux/clk-provider.h>
+#include <linux/i2c.h>
+#include <linux/bcd.h>
+#include <linux/rtc.h>
+
+#define HYM8563_CTL1		0x00
+#define HYM8563_CTL1_TEST	BIT(7)
+#define HYM8563_CTL1_STOP	BIT(5)
+#define HYM8563_CTL1_TESTC	BIT(3)
+
+#define HYM8563_CTL2		0x01
+#define HYM8563_CTL2_TI_TP	BIT(4)
+#define HYM8563_CTL2_AF		BIT(3)
+#define HYM8563_CTL2_TF		BIT(2)
+#define HYM8563_CTL2_AIE	BIT(1)
+#define HYM8563_CTL2_TIE	BIT(0)
+
+#define HYM8563_SEC		0x02
+#define HYM8563_SEC_VL		BIT(7)
+#define HYM8563_SEC_MASK	0x7f
+
+#define HYM8563_MIN		0x03
+#define HYM8563_MIN_MASK	0x7f
+
+#define HYM8563_HOUR		0x04
+#define HYM8563_HOUR_MASK	0x3f
+
+#define HYM8563_DAY		0x05
+#define HYM8563_DAY_MASK	0x3f
+
+#define HYM8563_WEEKDAY		0x06
+#define HYM8563_WEEKDAY_MASK	0x07
+
+#define HYM8563_MONTH		0x07
+#define HYM8563_MONTH_CENTURY	BIT(7)
+#define HYM8563_MONTH_MASK	0x1f
+
+#define HYM8563_YEAR		0x08
+
+#define HYM8563_ALM_MIN		0x09
+#define HYM8563_ALM_HOUR	0x0a
+#define HYM8563_ALM_DAY		0x0b
+#define HYM8563_ALM_WEEK	0x0c
+
+/* Each alarm check can be disabled by setting this bit in the register */
+#define HYM8563_ALM_BIT_DISABLE	BIT(7)
+
+#define HYM8563_CLKOUT		0x0d
+#define HYM8563_CLKOUT_ENABLE	BIT(7)
+#define HYM8563_CLKOUT_32768	0
+#define HYM8563_CLKOUT_1024	1
+#define HYM8563_CLKOUT_32	2
+#define HYM8563_CLKOUT_1	3
+#define HYM8563_CLKOUT_MASK	3
+
+#define HYM8563_TMR_CTL		0x0e
+#define HYM8563_TMR_CTL_ENABLE	BIT(7)
+#define HYM8563_TMR_CTL_4096	0
+#define HYM8563_TMR_CTL_64	1
+#define HYM8563_TMR_CTL_1	2
+#define HYM8563_TMR_CTL_1_60	3
+#define HYM8563_TMR_CTL_MASK	3
+
+#define HYM8563_TMR_CNT		0x0f
+
+struct hym8563 {
+	struct i2c_client	*client;
+	struct rtc_device	*rtc;
+#ifdef CONFIG_COMMON_CLK
+	struct clk_hw		clkout_hw;
+#endif
+};
+
+/*
+ * RTC handling
+ */
+
+static int hym8563_rtc_read_time(struct device *dev, struct rtc_time *tm)
+{
+	struct i2c_client *client = to_i2c_client(dev);
+	u8 buf[7];
+	int ret;
+
+	ret = i2c_smbus_read_i2c_block_data(client, HYM8563_SEC, 7, buf);
+	if (ret < 0)
+		return ret;
+
+	if (buf[0] & HYM8563_SEC_VL) {
+		dev_warn(&client->dev,
+			 "no valid clock/calendar values available\n");
+		return -EINVAL;
+	}
+
+	tm->tm_sec = bcd2bin(buf[0] & HYM8563_SEC_MASK);
+	tm->tm_min = bcd2bin(buf[1] & HYM8563_MIN_MASK);
+	tm->tm_hour = bcd2bin(buf[2] & HYM8563_HOUR_MASK);
+	tm->tm_mday = bcd2bin(buf[3] & HYM8563_DAY_MASK);
+	tm->tm_wday = bcd2bin(buf[4] & HYM8563_WEEKDAY_MASK); /* 0 = Sun */
+	tm->tm_mon = bcd2bin(buf[5] & HYM8563_MONTH_MASK) - 1; /* 0 = Jan */
+	tm->tm_year = bcd2bin(buf[6]) + 100;
+
+	return 0;
+}
+
+static int hym8563_rtc_set_time(struct device *dev, struct rtc_time *tm)
+{
+	struct i2c_client *client = to_i2c_client(dev);
+	u8 buf[7];
+	int ret;
+
+	/* Years >= 2100 are to far in the future, 19XX is to early */
+	if (tm->tm_year < 100 || tm->tm_year >= 200)
+		return -EINVAL;
+
+	buf[0] = bin2bcd(tm->tm_sec);
+	buf[1] = bin2bcd(tm->tm_min);
+	buf[2] = bin2bcd(tm->tm_hour);
+	buf[3] = bin2bcd(tm->tm_mday);
+	buf[4] = bin2bcd(tm->tm_wday);
+	buf[5] = bin2bcd(tm->tm_mon + 1);
+
+	/*
+	 * While the HYM8563 has a century flag in the month register,
+	 * it does not seem to carry it over a subsequent write/read.
+	 * So we'll limit ourself to 100 years, starting at 2000 for now.
+	 */
+	buf[6] = bin2bcd(tm->tm_year - 100);
+
+	/*
+	 * CTL1 only contains TEST-mode bits apart from stop,
+	 * so no need to read the value first
+	 */
+	ret = i2c_smbus_write_byte_data(client, HYM8563_CTL1,
+						HYM8563_CTL1_STOP);
+	if (ret < 0)
+		return ret;
+
+	ret = i2c_smbus_write_i2c_block_data(client, HYM8563_SEC, 7, buf);
+	if (ret < 0)
+		return ret;
+
+	ret = i2c_smbus_write_byte_data(client, HYM8563_CTL1, 0);
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+
+static int hym8563_rtc_alarm_irq_enable(struct device *dev,
+					unsigned int enabled)
+{
+	struct i2c_client *client = to_i2c_client(dev);
+	int data;
+
+	data = i2c_smbus_read_byte_data(client, HYM8563_CTL2);
+	if (data < 0)
+		return data;
+
+	if (enabled)
+		data |= HYM8563_CTL2_AIE;
+	else
+		data &= ~HYM8563_CTL2_AIE;
+
+	return i2c_smbus_write_byte_data(client, HYM8563_CTL2, data);
+};
+
+static int hym8563_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alm)
+{
+	struct i2c_client *client = to_i2c_client(dev);
+	struct rtc_time *alm_tm = &alm->time;
+	u8 buf[4];
+	int ret;
+
+	ret = i2c_smbus_read_i2c_block_data(client, HYM8563_ALM_MIN, 4, buf);
+	if (ret < 0)
+		return ret;
+
+	/* The alarm only has a minute accuracy */
+	alm_tm->tm_sec = 0;
+
+	alm_tm->tm_min = (buf[0] & HYM8563_ALM_BIT_DISABLE) ?
+					-1 :
+					bcd2bin(buf[0] & HYM8563_MIN_MASK);
+	alm_tm->tm_hour = (buf[1] & HYM8563_ALM_BIT_DISABLE) ?
+					-1 :
+					bcd2bin(buf[1] & HYM8563_HOUR_MASK);
+	alm_tm->tm_mday = (buf[2] & HYM8563_ALM_BIT_DISABLE) ?
+					-1 :
+					bcd2bin(buf[2] & HYM8563_DAY_MASK);
+	alm_tm->tm_wday = (buf[3] & HYM8563_ALM_BIT_DISABLE) ?
+					-1 :
+					bcd2bin(buf[3] & HYM8563_WEEKDAY_MASK);
+
+	ret = i2c_smbus_read_byte_data(client, HYM8563_CTL2);
+	if (ret < 0)
+		return ret;
+
+	if (ret & HYM8563_CTL2_AIE)
+		alm->enabled = 1;
+
+	return 0;
+}
+
+static int hym8563_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alm)
+{
+	struct i2c_client *client = to_i2c_client(dev);
+	struct rtc_time *alm_tm = &alm->time;
+	u8 buf[4];
+	int ret;
+
+	ret = i2c_smbus_read_byte_data(client, HYM8563_CTL2);
+	if (ret < 0)
+		return ret;
+
+	ret &= ~HYM8563_CTL2_AIE;
+
+	ret = i2c_smbus_write_byte_data(client, HYM8563_CTL2, ret);
+	if (ret < 0)
+		return ret;
+
+	buf[0] = (alm_tm->tm_min < 60 && alm_tm->tm_min >= 0) ?
+			bin2bcd(alm_tm->tm_min) : HYM8563_ALM_BIT_DISABLE;
+
+	buf[1] = (alm_tm->tm_hour < 24 && alm_tm->tm_hour >= 0) ?
+			bin2bcd(alm_tm->tm_hour) : HYM8563_ALM_BIT_DISABLE;
+
+	buf[2] = (alm_tm->tm_mday <= 31 && alm_tm->tm_mday >= 1) ?
+			bin2bcd(alm_tm->tm_mday) : HYM8563_ALM_BIT_DISABLE;
+
+	buf[3] = (alm_tm->tm_wday < 7 && alm_tm->tm_wday >= 0) ?
+			bin2bcd(alm_tm->tm_wday) : HYM8563_ALM_BIT_DISABLE;
+
+	ret = i2c_smbus_write_i2c_block_data(client, HYM8563_ALM_MIN, 4, buf);
+	if (ret < 0)
+		return ret;
+
+	return hym8563_rtc_alarm_irq_enable(dev, alm->enabled);
+}
+
+static const struct rtc_class_ops hym8563_rtc_ops = {
+	.read_time		= hym8563_rtc_read_time,
+	.set_time		= hym8563_rtc_set_time,
+	.alarm_irq_enable	= hym8563_rtc_alarm_irq_enable,
+	.read_alarm		= hym8563_rtc_read_alarm,
+	.set_alarm		= hym8563_rtc_set_alarm,
+};
+
+/*
+ * Handling of the clkout
+ */
+
+#ifdef CONFIG_COMMON_CLK
+#define clkout_hw_to_hym8563(_hw) container_of(_hw, struct hym8563, clkout_hw)
+
+static int clkout_rates[] = {
+	32768,
+	1024,
+	32,
+	1,
+};
+
+static unsigned long hym8563_clkout_recalc_rate(struct clk_hw *hw,
+						unsigned long parent_rate)
+{
+	struct hym8563 *hym8563 = clkout_hw_to_hym8563(hw);
+	struct i2c_client *client = hym8563->client;
+	int ret = i2c_smbus_read_byte_data(client, HYM8563_CLKOUT);
+
+	if (ret < 0)
+		return 0;
+
+	ret &= HYM8563_CLKOUT_MASK;
+	return clkout_rates[ret];
+}
+
+static long hym8563_clkout_round_rate(struct clk_hw *hw, unsigned long rate,
+				      unsigned long *prate)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(clkout_rates); i++)
+		if (clkout_rates[i] <= rate)
+			return clkout_rates[i];
+
+	return 0;
+}
+
+static int hym8563_clkout_set_rate(struct clk_hw *hw, unsigned long rate,
+				   unsigned long parent_rate)
+{
+	struct hym8563 *hym8563 = clkout_hw_to_hym8563(hw);
+	struct i2c_client *client = hym8563->client;
+	int ret = i2c_smbus_read_byte_data(client, HYM8563_CLKOUT);
+	int i;
+
+	if (ret < 0)
+		return ret;
+
+	for (i = 0; i < ARRAY_SIZE(clkout_rates); i++)
+		if (clkout_rates[i] == rate) {
+			ret &= ~HYM8563_CLKOUT_MASK;
+			ret |= i;
+			return i2c_smbus_write_byte_data(client,
+							 HYM8563_CLKOUT, ret);
+		}
+
+	return -EINVAL;
+}
+
+static int hym8563_clkout_control(struct clk_hw *hw, bool enable)
+{
+	struct hym8563 *hym8563 = clkout_hw_to_hym8563(hw);
+	struct i2c_client *client = hym8563->client;
+	int ret = i2c_smbus_read_byte_data(client, HYM8563_CLKOUT);
+
+	if (ret < 0)
+		return ret;
+
+	if (enable)
+		ret |= HYM8563_CLKOUT_ENABLE;
+	else
+		ret &= ~HYM8563_CLKOUT_ENABLE;
+
+	return i2c_smbus_write_byte_data(client, HYM8563_CLKOUT, ret);
+}
+
+static int hym8563_clkout_prepare(struct clk_hw *hw)
+{
+	return hym8563_clkout_control(hw, 1);
+}
+
+static void hym8563_clkout_unprepare(struct clk_hw *hw)
+{
+	hym8563_clkout_control(hw, 0);
+}
+
+static int hym8563_clkout_is_prepared(struct clk_hw *hw)
+{
+	struct hym8563 *hym8563 = clkout_hw_to_hym8563(hw);
+	struct i2c_client *client = hym8563->client;
+	int ret = i2c_smbus_read_byte_data(client, HYM8563_CLKOUT);
+
+	if (ret < 0)
+		return ret;
+
+	return !!(ret & HYM8563_CLKOUT_ENABLE);
+}
+
+static const struct clk_ops hym8563_clkout_ops = {
+	.prepare = hym8563_clkout_prepare,
+	.unprepare = hym8563_clkout_unprepare,
+	.is_prepared = hym8563_clkout_is_prepared,
+	.recalc_rate = hym8563_clkout_recalc_rate,
+	.round_rate = hym8563_clkout_round_rate,
+	.set_rate = hym8563_clkout_set_rate,
+};
+
+static struct clk *hym8563_clkout_register_clk(struct hym8563 *hym8563)
+{
+	struct i2c_client *client = hym8563->client;
+	struct device_node *node = client->dev.of_node;
+	struct clk *clk;
+	struct clk_init_data init;
+	int ret;
+
+	ret = i2c_smbus_write_byte_data(client, HYM8563_CLKOUT,
+						0);
+	if (ret < 0)
+		return ERR_PTR(ret);
+
+	init.name = "hym8563-clkout";
+	init.ops = &hym8563_clkout_ops;
+	init.flags = 0;
+	init.parent_names = NULL;
+	init.num_parents = 0;
+	hym8563->clkout_hw.init = &init;
+
+	/* optional override of the clockname */
+	of_property_read_string(node, "clock-output-names", &init.name);
+
+	/* register the clock */
+	clk = clk_register(&client->dev, &hym8563->clkout_hw);
+
+	if (!IS_ERR(clk))
+		of_clk_add_provider(node, of_clk_src_simple_get, clk);
+
+	return clk;
+}
+#endif
+
+/*
+ * The alarm interrupt is implemented as a level-low interrupt in the
+ * hym8563, while the timer interrupt uses a falling edge.
+ * We don't use the timer at all, so the interrupt is requested to
+ * use the level-low trigger.
+ */
+static irqreturn_t hym8563_irq(int irq, void *dev_id)
+{
+	struct hym8563 *hym8563 = (struct hym8563 *)dev_id;
+	struct i2c_client *client = hym8563->client;
+	int data, ret;
+
+	rtc_lock(hym8563->rtc);
+
+	/* Clear the alarm flag */
+
+	data = i2c_smbus_read_byte_data(client, HYM8563_CTL2);
+	if (data < 0) {
+		dev_err(&client->dev, "%s: error reading i2c data %d\n",
+			__func__, data);
+		goto out;
+	}
+
+	data &= ~HYM8563_CTL2_AF;
+
+	ret = i2c_smbus_write_byte_data(client, HYM8563_CTL2, data);
+	if (ret < 0) {
+		dev_err(&client->dev, "%s: error writing i2c data %d\n",
+			__func__, ret);
+	}
+
+out:
+	rtc_unlock(hym8563->rtc);
+	return IRQ_HANDLED;
+}
+
+static int hym8563_init_device(struct i2c_client *client)
+{
+	int ret;
+
+	/* Clear stop flag if present */
+	ret = i2c_smbus_write_byte_data(client, HYM8563_CTL1, 0);
+	if (ret < 0)
+		return ret;
+
+	ret = i2c_smbus_read_byte_data(client, HYM8563_CTL2);
+	if (ret < 0)
+		return ret;
+
+	/* Disable alarm and timer interrupts */
+	ret &= ~HYM8563_CTL2_AIE;
+	ret &= ~HYM8563_CTL2_TIE;
+
+	/* Clear any pending alarm and timer flags */
+	if (ret & HYM8563_CTL2_AF)
+		ret &= ~HYM8563_CTL2_AF;
+
+	if (ret & HYM8563_CTL2_TF)
+		ret &= ~HYM8563_CTL2_TF;
+
+	ret &= ~HYM8563_CTL2_TI_TP;
+
+	return i2c_smbus_write_byte_data(client, HYM8563_CTL2, ret);
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int hym8563_suspend(struct device *dev)
+{
+	struct i2c_client *client = to_i2c_client(dev);
+	int ret;
+
+	if (device_may_wakeup(dev)) {
+		ret = enable_irq_wake(client->irq);
+		if (ret) {
+			dev_err(dev, "enable_irq_wake failed, %d\n", ret);
+			return ret;
+		}
+	}
+
+	return 0;
+}
+
+static int hym8563_resume(struct device *dev)
+{
+	struct i2c_client *client = to_i2c_client(dev);
+
+	if (device_may_wakeup(dev))
+		disable_irq_wake(client->irq);
+
+	return 0;
+}
+#endif
+
+static SIMPLE_DEV_PM_OPS(hym8563_pm_ops, hym8563_suspend, hym8563_resume);
+
+static int hym8563_probe(struct i2c_client *client)
+{
+	struct hym8563 *hym8563;
+	int ret;
+
+	hym8563 = devm_kzalloc(&client->dev, sizeof(*hym8563), GFP_KERNEL);
+	if (!hym8563)
+		return -ENOMEM;
+
+	hym8563->rtc = devm_rtc_allocate_device(&client->dev);
+	if (IS_ERR(hym8563->rtc))
+		return PTR_ERR(hym8563->rtc);
+
+	hym8563->client = client;
+	i2c_set_clientdata(client, hym8563);
+
+	ret = hym8563_init_device(client);
+	if (ret) {
+		dev_err(&client->dev, "could not init device, %d\n", ret);
+		return ret;
+	}
+
+	if (client->irq > 0) {
+		ret = devm_request_threaded_irq(&client->dev, client->irq,
+						NULL, hym8563_irq,
+						IRQF_TRIGGER_LOW | IRQF_ONESHOT,
+						client->name, hym8563);
+		if (ret < 0) {
+			dev_err(&client->dev, "irq %d request failed, %d\n",
+				client->irq, ret);
+			return ret;
+		}
+	}
+
+	if (client->irq > 0 ||
+	    device_property_read_bool(&client->dev, "wakeup-source")) {
+		device_init_wakeup(&client->dev, true);
+	}
+
+	/* check state of calendar information */
+	ret = i2c_smbus_read_byte_data(client, HYM8563_SEC);
+	if (ret < 0)
+		return ret;
+
+	dev_dbg(&client->dev, "rtc information is %s\n",
+		(ret & HYM8563_SEC_VL) ? "invalid" : "valid");
+
+	hym8563->rtc->ops = &hym8563_rtc_ops;
+	set_bit(RTC_FEATURE_ALARM_RES_MINUTE, hym8563->rtc->features);
+	clear_bit(RTC_FEATURE_UPDATE_INTERRUPT, hym8563->rtc->features);
+
+#ifdef CONFIG_COMMON_CLK
+	hym8563_clkout_register_clk(hym8563);
+#endif
+
+	return devm_rtc_register_device(hym8563->rtc);
+}
+
+static const struct i2c_device_id hym8563_id[] = {
+	{ "hym8563", 0 },
+	{},
+};
+MODULE_DEVICE_TABLE(i2c, hym8563_id);
+
+static const struct of_device_id hym8563_dt_idtable[] = {
+	{ .compatible = "haoyu,hym8563" },
+	{},
+};
+MODULE_DEVICE_TABLE(of, hym8563_dt_idtable);
+
+static struct i2c_driver hym8563_driver = {
+	.driver		= {
+		.name	= "rtc-hym8563",
+		.pm	= &hym8563_pm_ops,
+		.of_match_table	= hym8563_dt_idtable,
+	},
+	.probe_new	= hym8563_probe,
+	.id_table	= hym8563_id,
+};
+
+module_i2c_driver(hym8563_driver);
+
+MODULE_AUTHOR("Heiko Stuebner <heiko@sntech.de>");
+MODULE_DESCRIPTION("HYM8563 RTC driver");
+MODULE_LICENSE("GPL");