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, 621 insertions, 0 deletions

diff --git a/drivers/macintosh/therm_adt746x.c b/drivers/macintosh/therm_adt746x.c
new file mode 100644
index 000000000..8f5db9093
--- /dev/null
+++ b/drivers/macintosh/therm_adt746x.c
@@ -0,0 +1,621 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Device driver for the i2c thermostat found on the iBook G4, Albook G4
+ *
+ * Copyright (C) 2003, 2004 Colin Leroy, Rasmus Rohde, Benjamin Herrenschmidt
+ *
+ * Documentation from 115254175ADT7467_pra.pdf and 3686221171167ADT7460_b.pdf
+ * https://www.onsemi.com/PowerSolutions/product.do?id=ADT7467
+ * https://www.onsemi.com/PowerSolutions/product.do?id=ADT7460
+ *
+ */
+
+#include <linux/types.h>
+#include <linux/module.h>
+#include <linux/errno.h>
+#include <linux/kernel.h>
+#include <linux/delay.h>
+#include <linux/sched.h>
+#include <linux/i2c.h>
+#include <linux/slab.h>
+#include <linux/init.h>
+#include <linux/spinlock.h>
+#include <linux/wait.h>
+#include <linux/suspend.h>
+#include <linux/kthread.h>
+#include <linux/moduleparam.h>
+#include <linux/freezer.h>
+#include <linux/of_platform.h>
+
+#include <asm/machdep.h>
+#include <asm/io.h>
+#include <asm/sections.h>
+
+#undef DEBUG
+
+#define CONFIG_REG   0x40
+#define MANUAL_MASK  0xe0
+#define AUTO_MASK    0x20
+#define INVERT_MASK  0x10
+
+static u8 TEMP_REG[3]    = {0x26, 0x25, 0x27}; /* local, sensor1, sensor2 */
+static u8 LIMIT_REG[3]   = {0x6b, 0x6a, 0x6c}; /* local, sensor1, sensor2 */
+static u8 MANUAL_MODE[2] = {0x5c, 0x5d};       
+static u8 REM_CONTROL[2] = {0x00, 0x40};
+static u8 FAN_SPEED[2]   = {0x28, 0x2a};
+static u8 FAN_SPD_SET[2] = {0x30, 0x31};
+
+static u8 default_limits_local[3] = {70, 50, 70};    /* local, sensor1, sensor2 */
+static u8 default_limits_chip[3] = {80, 65, 80};    /* local, sensor1, sensor2 */
+static const char *sensor_location[3] = { "?", "?", "?" };
+
+static int limit_adjust;
+static int fan_speed = -1;
+static bool verbose;
+
+MODULE_AUTHOR("Colin Leroy <colin@colino.net>");
+MODULE_DESCRIPTION("Driver for ADT746x thermostat in iBook G4 and "
+		   "Powerbook G4 Alu");
+MODULE_LICENSE("GPL");
+
+module_param(limit_adjust, int, 0644);
+MODULE_PARM_DESC(limit_adjust,"Adjust maximum temperatures (50 sensor1, 70 sensor2) "
+		 "by N degrees.");
+
+module_param(fan_speed, int, 0644);
+MODULE_PARM_DESC(fan_speed,"Specify starting fan speed (0-255) "
+		 "(default 64)");
+
+module_param(verbose, bool, 0);
+MODULE_PARM_DESC(verbose,"Verbose log operations "
+		 "(default 0)");
+
+struct thermostat {
+	struct i2c_client	*clt;
+	u8			temps[3];
+	u8			cached_temp[3];
+	u8			initial_limits[3];
+	u8			limits[3];
+	int			last_speed[2];
+	int			last_var[2];
+	int			pwm_inv[2];
+	struct task_struct	*thread;
+	struct platform_device	*pdev;
+	enum {
+		ADT7460,
+		ADT7467
+	}			type;
+};
+
+static void write_both_fan_speed(struct thermostat *th, int speed);
+static void write_fan_speed(struct thermostat *th, int speed, int fan);
+
+static int
+write_reg(struct thermostat* th, int reg, u8 data)
+{
+	u8 tmp[2];
+	int rc;
+	
+	tmp[0] = reg;
+	tmp[1] = data;
+	rc = i2c_master_send(th->clt, (const char *)tmp, 2);
+	if (rc < 0)
+		return rc;
+	if (rc != 2)
+		return -ENODEV;
+	return 0;
+}
+
+static int
+read_reg(struct thermostat* th, int reg)
+{
+	u8 reg_addr, data;
+	int rc;
+
+	reg_addr = (u8)reg;
+	rc = i2c_master_send(th->clt, &reg_addr, 1);
+	if (rc < 0)
+		return rc;
+	if (rc != 1)
+		return -ENODEV;
+	rc = i2c_master_recv(th->clt, (char *)&data, 1);
+	if (rc < 0)
+		return rc;
+	return data;
+}
+
+static int read_fan_speed(struct thermostat *th, u8 addr)
+{
+	u8 tmp[2];
+	u16 res;
+	
+	/* should start with low byte */
+	tmp[1] = read_reg(th, addr);
+	tmp[0] = read_reg(th, addr + 1);
+	
+	res = tmp[1] + (tmp[0] << 8);
+	/* "a value of 0xffff means that the fan has stopped" */
+	return (res == 0xffff ? 0 : (90000*60)/res);
+}
+
+static void write_both_fan_speed(struct thermostat *th, int speed)
+{
+	write_fan_speed(th, speed, 0);
+	if (th->type == ADT7460)
+		write_fan_speed(th, speed, 1);
+}
+
+static void write_fan_speed(struct thermostat *th, int speed, int fan)
+{
+	u8 manual;
+	
+	if (speed > 0xff) 
+		speed = 0xff;
+	else if (speed < -1) 
+		speed = 0;
+	
+	if (th->type == ADT7467 && fan == 1)
+		return;
+	
+	if (th->last_speed[fan] != speed) {
+		if (verbose) {
+			if (speed == -1)
+				printk(KERN_DEBUG "adt746x: Setting speed to automatic "
+					"for %s fan.\n", sensor_location[fan+1]);
+			else
+				printk(KERN_DEBUG "adt746x: Setting speed to %d "
+					"for %s fan.\n", speed, sensor_location[fan+1]);
+		}
+	} else
+		return;
+	
+	if (speed >= 0) {
+		manual = read_reg(th, MANUAL_MODE[fan]);
+		manual &= ~INVERT_MASK;
+		write_reg(th, MANUAL_MODE[fan],
+			manual | MANUAL_MASK | th->pwm_inv[fan]);
+		write_reg(th, FAN_SPD_SET[fan], speed);
+	} else {
+		/* back to automatic */
+		if(th->type == ADT7460) {
+			manual = read_reg(th,
+				MANUAL_MODE[fan]) & (~MANUAL_MASK);
+			manual &= ~INVERT_MASK;
+			manual |= th->pwm_inv[fan];
+			write_reg(th,
+				MANUAL_MODE[fan], manual|REM_CONTROL[fan]);
+		} else {
+			manual = read_reg(th, MANUAL_MODE[fan]);
+			manual &= ~INVERT_MASK;
+			manual |= th->pwm_inv[fan];
+			write_reg(th, MANUAL_MODE[fan], manual&(~AUTO_MASK));
+		}
+	}
+	
+	th->last_speed[fan] = speed;			
+}
+
+static void read_sensors(struct thermostat *th)
+{
+	int i = 0;
+
+	for (i = 0; i < 3; i++)
+		th->temps[i]  = read_reg(th, TEMP_REG[i]);
+}
+
+#ifdef DEBUG
+static void display_stats(struct thermostat *th)
+{
+	if (th->temps[0] != th->cached_temp[0]
+	||  th->temps[1] != th->cached_temp[1]
+	||  th->temps[2] != th->cached_temp[2]) {
+		printk(KERN_INFO "adt746x: Temperature infos:"
+				 " thermostats: %d,%d,%d;"
+				 " limits: %d,%d,%d;"
+				 " fan speed: %d RPM\n",
+				 th->temps[0], th->temps[1], th->temps[2],
+				 th->limits[0],  th->limits[1],  th->limits[2],
+				 read_fan_speed(th, FAN_SPEED[0]));
+	}
+	th->cached_temp[0] = th->temps[0];
+	th->cached_temp[1] = th->temps[1];
+	th->cached_temp[2] = th->temps[2];
+}
+#endif
+
+static void update_fans_speed (struct thermostat *th)
+{
+	int lastvar = 0; /* last variation, for iBook */
+	int i = 0;
+
+	/* we don't care about local sensor, so we start at sensor 1 */
+	for (i = 1; i < 3; i++) {
+		bool started = false;
+		int fan_number = (th->type == ADT7460 && i == 2);
+		int var = th->temps[i] - th->limits[i];
+
+		if (var > -1) {
+			int step = (255 - fan_speed) / 7;
+			int new_speed = 0;
+
+			/* hysteresis : change fan speed only if variation is
+			 * more than two degrees */
+			if (abs(var - th->last_var[fan_number]) < 2)
+				continue;
+
+			started = true;
+			new_speed = fan_speed + ((var-1)*step);
+
+			if (new_speed < fan_speed)
+				new_speed = fan_speed;
+			if (new_speed > 255)
+				new_speed = 255;
+
+			if (verbose)
+				printk(KERN_DEBUG "adt746x: Setting fans speed to %d "
+						 "(limit exceeded by %d on %s)\n",
+						new_speed, var,
+						sensor_location[fan_number+1]);
+			write_both_fan_speed(th, new_speed);
+			th->last_var[fan_number] = var;
+		} else if (var < -2) {
+			/* don't stop fan if sensor2 is cold and sensor1 is not
+			 * so cold (lastvar >= -1) */
+			if (i == 2 && lastvar < -1) {
+				if (th->last_speed[fan_number] != 0)
+					if (verbose)
+						printk(KERN_DEBUG "adt746x: Stopping "
+							"fans.\n");
+				write_both_fan_speed(th, 0);
+			}
+		}
+
+		lastvar = var;
+
+		if (started)
+			return; /* we don't want to re-stop the fan
+				* if sensor1 is heating and sensor2 is not */
+	}
+}
+
+static int monitor_task(void *arg)
+{
+	struct thermostat* th = arg;
+
+	set_freezable();
+	while(!kthread_should_stop()) {
+		try_to_freeze();
+		msleep_interruptible(2000);
+
+#ifndef DEBUG
+		if (fan_speed != -1)
+			read_sensors(th);
+#else
+		read_sensors(th);
+#endif		
+
+		if (fan_speed != -1)
+			update_fans_speed(th);
+
+#ifdef DEBUG
+		display_stats(th);
+#endif
+
+	}
+
+	return 0;
+}
+
+static void set_limit(struct thermostat *th, int i)
+{
+	/* Set sensor1 limit higher to avoid powerdowns */
+	th->limits[i] = default_limits_chip[i] + limit_adjust;
+	write_reg(th, LIMIT_REG[i], th->limits[i]);
+		
+	/* set our limits to normal */
+	th->limits[i] = default_limits_local[i] + limit_adjust;
+}
+
+#define BUILD_SHOW_FUNC_INT(name, data)				\
+static ssize_t show_##name(struct device *dev, struct device_attribute *attr, char *buf)	\
+{								\
+	struct thermostat *th = dev_get_drvdata(dev);		\
+	return sprintf(buf, "%d\n", data);			\
+}
+
+#define BUILD_SHOW_FUNC_INT_LITE(name, data)				\
+static ssize_t show_##name(struct device *dev, struct device_attribute *attr, char *buf)	\
+{								\
+	return sprintf(buf, "%d\n", data);			\
+}
+
+#define BUILD_SHOW_FUNC_STR(name, data)				\
+static ssize_t show_##name(struct device *dev, struct device_attribute *attr, char *buf)       \
+{								\
+	return sprintf(buf, "%s\n", data);			\
+}
+
+#define BUILD_SHOW_FUNC_FAN(name, data)				\
+static ssize_t show_##name(struct device *dev, struct device_attribute *attr, char *buf)       \
+{								\
+	struct thermostat *th = dev_get_drvdata(dev);		\
+	return sprintf(buf, "%d (%d rpm)\n", 			\
+		th->last_speed[data],				\
+		read_fan_speed(th, FAN_SPEED[data])		\
+		);						\
+}
+
+#define BUILD_STORE_FUNC_DEG(name, data)			\
+static ssize_t store_##name(struct device *dev, struct device_attribute *attr, const char *buf, size_t n) \
+{								\
+	struct thermostat *th = dev_get_drvdata(dev);		\
+	int val;						\
+	int i;							\
+	val = simple_strtol(buf, NULL, 10);			\
+	printk(KERN_INFO "Adjusting limits by %d degrees\n", val);	\
+	limit_adjust = val;					\
+	for (i=0; i < 3; i++)					\
+		set_limit(th, i);				\
+	return n;						\
+}
+
+#define BUILD_STORE_FUNC_INT(name, data)			\
+static ssize_t store_##name(struct device *dev, struct device_attribute *attr, const char *buf, size_t n) \
+{								\
+	int val;						\
+	val = simple_strtol(buf, NULL, 10);			\
+	if (val < 0 || val > 255)				\
+		return -EINVAL;					\
+	printk(KERN_INFO "Setting specified fan speed to %d\n", val);	\
+	data = val;						\
+	return n;						\
+}
+
+BUILD_SHOW_FUNC_INT(sensor1_temperature,	 (read_reg(th, TEMP_REG[1])))
+BUILD_SHOW_FUNC_INT(sensor2_temperature,	 (read_reg(th, TEMP_REG[2])))
+BUILD_SHOW_FUNC_INT(sensor1_limit,		 th->limits[1])
+BUILD_SHOW_FUNC_INT(sensor2_limit,		 th->limits[2])
+BUILD_SHOW_FUNC_STR(sensor1_location,		 sensor_location[1])
+BUILD_SHOW_FUNC_STR(sensor2_location,		 sensor_location[2])
+
+BUILD_SHOW_FUNC_INT_LITE(specified_fan_speed, fan_speed)
+BUILD_STORE_FUNC_INT(specified_fan_speed,fan_speed)
+
+BUILD_SHOW_FUNC_FAN(sensor1_fan_speed,	 0)
+BUILD_SHOW_FUNC_FAN(sensor2_fan_speed,	 1)
+
+BUILD_SHOW_FUNC_INT_LITE(limit_adjust,	 limit_adjust)
+BUILD_STORE_FUNC_DEG(limit_adjust,	 th)
+		
+static DEVICE_ATTR(sensor1_temperature,	S_IRUGO,
+		   show_sensor1_temperature,NULL);
+static DEVICE_ATTR(sensor2_temperature,	S_IRUGO,
+		   show_sensor2_temperature,NULL);
+static DEVICE_ATTR(sensor1_limit, S_IRUGO,
+		   show_sensor1_limit,	NULL);
+static DEVICE_ATTR(sensor2_limit, S_IRUGO,
+		   show_sensor2_limit,	NULL);
+static DEVICE_ATTR(sensor1_location, S_IRUGO,
+		   show_sensor1_location, NULL);
+static DEVICE_ATTR(sensor2_location, S_IRUGO,
+		   show_sensor2_location, NULL);
+
+static DEVICE_ATTR(specified_fan_speed,	S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH,
+		   show_specified_fan_speed,store_specified_fan_speed);
+
+static DEVICE_ATTR(sensor1_fan_speed,	S_IRUGO,
+		   show_sensor1_fan_speed,	NULL);
+static DEVICE_ATTR(sensor2_fan_speed,	S_IRUGO,
+		   show_sensor2_fan_speed,	NULL);
+
+static DEVICE_ATTR(limit_adjust,	S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH,
+		   show_limit_adjust,	store_limit_adjust);
+
+static void thermostat_create_files(struct thermostat *th)
+{
+	struct device_node *np = th->clt->dev.of_node;
+	struct device *dev;
+	int err;
+
+	/* To maintain ABI compatibility with userspace, create
+	 * the old style platform driver and attach the attributes
+	 * to it here
+	 */
+	th->pdev = of_platform_device_create(np, "temperatures", NULL);
+	if (!th->pdev)
+		return;
+	dev = &th->pdev->dev;
+	dev_set_drvdata(dev, th);
+	err = device_create_file(dev, &dev_attr_sensor1_temperature);
+	err |= device_create_file(dev, &dev_attr_sensor2_temperature);
+	err |= device_create_file(dev, &dev_attr_sensor1_limit);
+	err |= device_create_file(dev, &dev_attr_sensor2_limit);
+	err |= device_create_file(dev, &dev_attr_sensor1_location);
+	err |= device_create_file(dev, &dev_attr_sensor2_location);
+	err |= device_create_file(dev, &dev_attr_limit_adjust);
+	err |= device_create_file(dev, &dev_attr_specified_fan_speed);
+	err |= device_create_file(dev, &dev_attr_sensor1_fan_speed);
+	if(th->type == ADT7460)
+		err |= device_create_file(dev, &dev_attr_sensor2_fan_speed);
+	if (err)
+		printk(KERN_WARNING
+			"Failed to create temperature attribute file(s).\n");
+}
+
+static void thermostat_remove_files(struct thermostat *th)
+{
+	struct device *dev;
+
+	if (!th->pdev)
+		return;
+	dev = &th->pdev->dev;
+	device_remove_file(dev, &dev_attr_sensor1_temperature);
+	device_remove_file(dev, &dev_attr_sensor2_temperature);
+	device_remove_file(dev, &dev_attr_sensor1_limit);
+	device_remove_file(dev, &dev_attr_sensor2_limit);
+	device_remove_file(dev, &dev_attr_sensor1_location);
+	device_remove_file(dev, &dev_attr_sensor2_location);
+	device_remove_file(dev, &dev_attr_limit_adjust);
+	device_remove_file(dev, &dev_attr_specified_fan_speed);
+	device_remove_file(dev, &dev_attr_sensor1_fan_speed);	
+	if (th->type == ADT7460)
+		device_remove_file(dev, &dev_attr_sensor2_fan_speed);
+	of_device_unregister(th->pdev);
+
+}
+
+static int probe_thermostat(struct i2c_client *client)
+{
+	const struct i2c_device_id *id = i2c_client_get_device_id(client);
+	struct device_node *np = client->dev.of_node;
+	struct thermostat* th;
+	const __be32 *prop;
+	int i, rc, vers, offset = 0;
+
+	if (!np)
+		return -ENXIO;
+	prop = of_get_property(np, "hwsensor-params-version", NULL);
+	if (!prop)
+		return -ENXIO;
+	vers = be32_to_cpup(prop);
+	printk(KERN_INFO "adt746x: version %d (%ssupported)\n",
+	       vers, vers == 1 ? "" : "un");
+	if (vers != 1)
+		return -ENXIO;
+
+	if (of_get_property(np, "hwsensor-location", NULL)) {
+		for (i = 0; i < 3; i++) {
+			sensor_location[i] = of_get_property(np,
+					"hwsensor-location", NULL) + offset;
+
+			if (sensor_location[i] == NULL)
+				sensor_location[i] = "";
+
+			printk(KERN_INFO "sensor %d: %s\n", i, sensor_location[i]);
+			offset += strlen(sensor_location[i]) + 1;
+		}
+	}
+
+	th = kzalloc(sizeof(struct thermostat), GFP_KERNEL);
+	if (!th)
+		return -ENOMEM;
+
+	i2c_set_clientdata(client, th);
+	th->clt = client;
+	th->type = id->driver_data;
+
+	rc = read_reg(th, CONFIG_REG);
+	if (rc < 0) {
+		dev_err(&client->dev, "Thermostat failed to read config!\n");
+		kfree(th);
+		return -ENODEV;
+	}
+
+	/* force manual control to start the fan quieter */
+	if (fan_speed == -1)
+		fan_speed = 64;
+	
+	if (th->type == ADT7460) {
+		printk(KERN_INFO "adt746x: ADT7460 initializing\n");
+		/* The 7460 needs to be started explicitly */
+		write_reg(th, CONFIG_REG, 1);
+	} else
+		printk(KERN_INFO "adt746x: ADT7467 initializing\n");
+
+	for (i = 0; i < 3; i++) {
+		th->initial_limits[i] = read_reg(th, LIMIT_REG[i]);
+		set_limit(th, i);
+	}
+
+	printk(KERN_INFO "adt746x: Lowering max temperatures from %d, %d, %d"
+			 " to %d, %d, %d\n",
+			 th->initial_limits[0], th->initial_limits[1],
+			 th->initial_limits[2], th->limits[0], th->limits[1],
+			 th->limits[2]);
+
+	/* record invert bit status because fw can corrupt it after suspend */
+	th->pwm_inv[0] = read_reg(th, MANUAL_MODE[0]) & INVERT_MASK;
+	th->pwm_inv[1] = read_reg(th, MANUAL_MODE[1]) & INVERT_MASK;
+
+	/* be sure to really write fan speed the first time */
+	th->last_speed[0] = -2;
+	th->last_speed[1] = -2;
+	th->last_var[0] = -80;
+	th->last_var[1] = -80;
+
+	if (fan_speed != -1) {
+		/* manual mode, stop fans */
+		write_both_fan_speed(th, 0);
+	} else {
+		/* automatic mode */
+		write_both_fan_speed(th, -1);
+	}
+	
+	th->thread = kthread_run(monitor_task, th, "kfand");
+	if (th->thread == ERR_PTR(-ENOMEM)) {
+		printk(KERN_INFO "adt746x: Kthread creation failed\n");
+		th->thread = NULL;
+		return -ENOMEM;
+	}
+
+	thermostat_create_files(th);
+
+	return 0;
+}
+
+static void remove_thermostat(struct i2c_client *client)
+{
+	struct thermostat *th = i2c_get_clientdata(client);
+	int i;
+	
+	thermostat_remove_files(th);
+
+	if (th->thread != NULL)
+		kthread_stop(th->thread);
+
+	printk(KERN_INFO "adt746x: Putting max temperatures back from "
+			 "%d, %d, %d to %d, %d, %d\n",
+		th->limits[0], th->limits[1], th->limits[2],
+		th->initial_limits[0], th->initial_limits[1],
+		th->initial_limits[2]);
+
+	for (i = 0; i < 3; i++)
+		write_reg(th, LIMIT_REG[i], th->initial_limits[i]);
+
+	write_both_fan_speed(th, -1);
+
+	kfree(th);
+}
+
+static const struct i2c_device_id therm_adt746x_id[] = {
+	{ "MAC,adt7460", ADT7460 },
+	{ "MAC,adt7467", ADT7467 },
+	{ }
+};
+MODULE_DEVICE_TABLE(i2c, therm_adt746x_id);
+
+static struct i2c_driver thermostat_driver = {
+	.driver = {
+		.name	= "therm_adt746x",
+	},
+	.probe_new = probe_thermostat,
+	.remove = remove_thermostat,
+	.id_table = therm_adt746x_id,
+};
+
+static int __init thermostat_init(void)
+{
+#ifndef CONFIG_I2C_POWERMAC
+	request_module("i2c-powermac");
+#endif
+
+	return i2c_add_driver(&thermostat_driver);
+}
+
+static void __exit thermostat_exit(void)
+{
+	i2c_del_driver(&thermostat_driver);
+}
+
+module_init(thermostat_init);
+module_exit(thermostat_exit);