[GIT PATCH v3.1] thinkpad-acpi changes for the merge window (part 1)

[GIT PATCH v3.1] thinkpad-acpi changes for the merge window (part 1)

[Henrique de Moraes Holschuh]

Len,

Here is the third version (fixed) of the first batch of changes for
thinkpad-acpi, targetted at the next merge window.   They're mostly
non-critical fixes.

I have found a stupid bug on v2 and v2.1 of patch 6, and fixed it
(hopefully correctly, this time). I am *really* sorry about that.

I have also added two new patches, that were going to be sent as part 2,
but I might as well just send them in right now.

Patches 8 and 9 *fix* a big ABI problem with the way thinkpad-acpi was
exporting the hwmon attributes, which precluded it from working with
lm-sensors(!).  Since I am already touching the ABI, it also prepares
the thinkpad-acpi sensors ABI for a module split (so I can shunt all the
hwmon code to a new module later, and userspace won't even notice).

Please merge this batch to acpi-test.  It replaces previous versions of
"thinkpad-acpi changes for the merge window (part 1)".

As usual, the patch set is available at:
git://repo.or.cz/linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git for-upstream/acpi-test

Shortlog of the above branch:

Henrique de Moraes Holschuh (9):
      ACPI: thinkpad-acpi: make room for more features in tp_features bitfield
      ACPI: thinkpad-acpi: issue EV_SYNC after EV_SWITCH
      ACPI: thinkpad-acpi: add mutex-based locking to input device event send path
      ACPI: thinkpad-acpi: keep track of module state
      ACPI: thinkpad-acpi: check version of hot key firmware
      ACPI: thinkpad-acpi: dequeue all pending hot key events at once (v2.2)
      ACPI: thinkpad-acpi: fix regression on HKEY LID event handling
      ACPI: thinkpad-acpi: use a separate platform device for hwmon and name it
      ACPI: thinkpad-acpi: duplicate driver attributes to new hwmon pdrv

Thanks.

-- 
  "One disk to rule them all, One disk to find them. One disk to bring
  them all and in the darkness grind them. In the Land of Redmond
  where the shadows lie." -- The Silicon Valley Tarot
  Henrique Holschuh

[PATCH 1/9] ACPI: thinkpad-acpi: make room for more features in tp_features bitfield

[Henrique de Moraes Holschuh]

Increase tp_features to 32 bits.  It is too close to running out of room.

Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
---
 drivers/misc/thinkpad_acpi.h |   30 +++++++++++++++---------------
 1 files changed, 15 insertions(+), 15 deletions(-)

diff --git a/drivers/misc/thinkpad_acpi.h b/drivers/misc/thinkpad_acpi.h
index 082a1cb..fa64ded 100644
--- a/drivers/misc/thinkpad_acpi.h
+++ b/drivers/misc/thinkpad_acpi.h
@@ -233,22 +233,22 @@ struct ibm_init_struct {
 
 static struct {
 #ifdef CONFIG_THINKPAD_ACPI_BAY
-	u16 bay_status:1;
-	u16 bay_eject:1;
-	u16 bay_status2:1;
-	u16 bay_eject2:1;
+	u32 bay_status:1;
+	u32 bay_eject:1;
+	u32 bay_status2:1;
+	u32 bay_eject2:1;
 #endif
-	u16 bluetooth:1;
-	u16 hotkey:1;
-	u16 hotkey_mask:1;
-	u16 hotkey_wlsw:1;
-	u16 light:1;
-	u16 light_status:1;
-	u16 wan:1;
-	u16 fan_ctrl_status_undef:1;
-	u16 input_device_registered:1;
-	u16 platform_drv_registered:1;
-	u16 platform_drv_attrs_registered:1;
+	u32 bluetooth:1;
+	u32 hotkey:1;
+	u32 hotkey_mask:1;
+	u32 hotkey_wlsw:1;
+	u32 light:1;
+	u32 light_status:1;
+	u32 wan:1;
+	u32 fan_ctrl_status_undef:1;
+	u32 input_device_registered:1;
+	u32 platform_drv_registered:1;
+	u32 platform_drv_attrs_registered:1;
 } tp_features;
 
 struct thinkpad_id_data {
-- 
1.5.3.1

[PATCH 2/9] ACPI: thinkpad-acpi: issue EV_SYNC after EV_SWITCH

[Henrique de Moraes Holschuh]

We were missing a input_sync on the radio switch event report path. Add it.

Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
---
 drivers/misc/thinkpad_acpi.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)

diff --git a/drivers/misc/thinkpad_acpi.c b/drivers/misc/thinkpad_acpi.c
index 0222bba..8aa0f96 100644
--- a/drivers/misc/thinkpad_acpi.c
+++ b/drivers/misc/thinkpad_acpi.c
@@ -1149,9 +1149,11 @@ static void tpacpi_input_send_radiosw(void)
 {
 	int wlsw;
 
-	if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&wlsw))
+	if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&wlsw)) {
 		input_report_switch(tpacpi_inputdev,
 				    SW_RADIO, !!wlsw);
+		input_sync(tpacpi_inputdev);
+	}
 }
 
 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
-- 
1.5.3.1

[PATCH 3/9] ACPI: thinkpad-acpi: add mutex-based locking to input device event send path

[Henrique de Moraes Holschuh]

Protect the input device event sending path with a mutex, since hot key
input events are not atomic and require an cohesive event block to be sent
together.

Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
---
 drivers/misc/thinkpad_acpi.c |   10 ++++++++++
 1 files changed, 10 insertions(+), 0 deletions(-)

diff --git a/drivers/misc/thinkpad_acpi.c b/drivers/misc/thinkpad_acpi.c
index 8aa0f96..0ced9d6 100644
--- a/drivers/misc/thinkpad_acpi.c
+++ b/drivers/misc/thinkpad_acpi.c
@@ -519,6 +519,7 @@ static char *next_cmd(char **cmds)
 static struct platform_device *tpacpi_pdev;
 static struct class_device *tpacpi_hwmon;
 static struct input_dev *tpacpi_inputdev;
+static struct mutex tpacpi_inputdev_send_mutex;
 
 
 static int tpacpi_resume_handler(struct platform_device *pdev)
@@ -1131,6 +1132,8 @@ static void tpacpi_input_send_key(unsigned int scancode,
 				  unsigned int keycode)
 {
 	if (keycode != KEY_RESERVED) {
+		mutex_lock(&tpacpi_inputdev_send_mutex);
+
 		input_report_key(tpacpi_inputdev, keycode, 1);
 		if (keycode == KEY_UNKNOWN)
 			input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
@@ -1142,6 +1145,8 @@ static void tpacpi_input_send_key(unsigned int scancode,
 			input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
 				    scancode);
 		input_sync(tpacpi_inputdev);
+
+		mutex_unlock(&tpacpi_inputdev_send_mutex);
 	}
 }
 
@@ -1149,11 +1154,15 @@ static void tpacpi_input_send_radiosw(void)
 {
 	int wlsw;
 
+	mutex_lock(&tpacpi_inputdev_send_mutex);
+
 	if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&wlsw)) {
 		input_report_switch(tpacpi_inputdev,
 				    SW_RADIO, !!wlsw);
 		input_sync(tpacpi_inputdev);
 	}
+
+	mutex_unlock(&tpacpi_inputdev_send_mutex);
 }
 
 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
@@ -4737,6 +4746,7 @@ static int __init thinkpad_acpi_module_init(void)
 		thinkpad_acpi_module_exit();
 		return ret;
 	}
+	mutex_init(&tpacpi_inputdev_send_mutex);
 	tpacpi_inputdev = input_allocate_device();
 	if (!tpacpi_inputdev) {
 		printk(IBM_ERR "unable to allocate input device\n");
-- 
1.5.3.1

[PATCH 4/9] ACPI: thinkpad-acpi: keep track of module state

[Henrique de Moraes Holschuh]

Keep track of module state (init, running, exit).  This makes it trivially
easy to avoid running any interrupt handlers, threads, or any other async
activity before we are ready, or when we want to go away.

Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
---
 drivers/misc/thinkpad_acpi.c |   20 +++++++++++++++++++-
 1 files changed, 19 insertions(+), 1 deletions(-)

diff --git a/drivers/misc/thinkpad_acpi.c b/drivers/misc/thinkpad_acpi.c
index 0ced9d6..2155139 100644
--- a/drivers/misc/thinkpad_acpi.c
+++ b/drivers/misc/thinkpad_acpi.c
@@ -117,6 +117,12 @@ IBM_BIOS_MODULE_ALIAS("K[U,X-Z]");
 
 #define __unused __attribute__ ((unused))
 
+static enum {
+	TPACPI_LIFE_INIT = 0,
+	TPACPI_LIFE_RUNNING,
+	TPACPI_LIFE_EXITING,
+} tpacpi_lifecycle;
+
 /****************************************************************************
  ****************************************************************************
  *
@@ -342,6 +348,9 @@ static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
 {
 	struct ibm_struct *ibm = data;
 
+	if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
+		return;
+
 	if (!ibm || !ibm->acpi || !ibm->acpi->notify)
 		return;
 
@@ -3899,6 +3908,9 @@ static void fan_watchdog_fire(struct work_struct *ignored)
 {
 	int rc;
 
+	if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
+		return;
+
 	printk(IBM_NOTICE "fan watchdog: enabling fan\n");
 	rc = fan_set_enable();
 	if (rc < 0) {
@@ -3919,7 +3931,8 @@ static void fan_watchdog_reset(void)
 	if (fan_watchdog_active)
 		cancel_delayed_work(&fan_watchdog_task);
 
-	if (fan_watchdog_maxinterval > 0) {
+	if (fan_watchdog_maxinterval > 0 &&
+	    tpacpi_lifecycle != TPACPI_LIFE_EXITING) {
 		fan_watchdog_active = 1;
 		if (!schedule_delayed_work(&fan_watchdog_task,
 				msecs_to_jiffies(fan_watchdog_maxinterval
@@ -4685,6 +4698,8 @@ static int __init thinkpad_acpi_module_init(void)
 {
 	int ret, i;
 
+	tpacpi_lifecycle = TPACPI_LIFE_INIT;
+
 	/* Parameter checking */
 	if (hotkey_report_mode > 2)
 		return -EINVAL;
@@ -4781,6 +4796,7 @@ static int __init thinkpad_acpi_module_init(void)
 		tp_features.input_device_registered = 1;
 	}
 
+	tpacpi_lifecycle = TPACPI_LIFE_RUNNING;
 	return 0;
 }
 
@@ -4788,6 +4804,8 @@ static void thinkpad_acpi_module_exit(void)
 {
 	struct ibm_struct *ibm, *itmp;
 
+	tpacpi_lifecycle = TPACPI_LIFE_EXITING;
+
 	list_for_each_entry_safe_reverse(ibm, itmp,
 					 &tpacpi_all_drivers,
 					 all_drivers) {
-- 
1.5.3.1

[PATCH 5/9] ACPI: thinkpad-acpi: check version of hot key firmware

[Henrique de Moraes Holschuh]

Check the HKEY firmware version (HKEY.MHKV handler), and refuse to load if
it is unknown.  Use this instead of the presence of HKEY.DHKV to detect hot
key mask capability.

Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
---
 drivers/misc/thinkpad_acpi.c |   28 +++++++++++++++++++++++-----
 1 files changed, 23 insertions(+), 5 deletions(-)

diff --git a/drivers/misc/thinkpad_acpi.c b/drivers/misc/thinkpad_acpi.c
index 2155139..9a61140 100644
--- a/drivers/misc/thinkpad_acpi.c
+++ b/drivers/misc/thinkpad_acpi.c
@@ -999,6 +999,7 @@ static int __init hotkey_init(struct ibm_init_struct *iibm)
 
 	int res, i;
 	int status;
+	int hkeyv;
 
 	vdbg_printk(TPACPI_DBG_INIT, "initializing hotkey subdriver\n");
 
@@ -1024,18 +1025,35 @@ static int __init hotkey_init(struct ibm_init_struct *iibm)
 			return res;
 
 		/* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
-		   A30, R30, R31, T20-22, X20-21, X22-24 */
-		tp_features.hotkey_mask =
-			acpi_evalf(hkey_handle, NULL, "DHKN", "qv");
+		   A30, R30, R31, T20-22, X20-21, X22-24.  Detected by checking
+		   for HKEY interface version 0x100 */
+		if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
+			if ((hkeyv >> 8) != 1) {
+				printk(IBM_ERR "unknown version of the "
+				       "HKEY interface: 0x%x\n", hkeyv);
+				printk(IBM_ERR "please report this to %s\n",
+				       IBM_MAIL);
+			} else {
+				/*
+				 * MHKV 0x100 in A31, R40, R40e,
+				 * T4x, X31, and later
+				 * */
+				tp_features.hotkey_mask = 1;
+			}
+		}
 
 		vdbg_printk(TPACPI_DBG_INIT, "hotkey masks are %s\n",
 			str_supported(tp_features.hotkey_mask));
 
 		if (tp_features.hotkey_mask) {
-			/* MHKA available in A31, R40, R40e, T4x, X31, and later */
 			if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
-					"MHKA", "qd"))
+					"MHKA", "qd")) {
+				printk(IBM_ERR
+				       "missing MHKA handler, "
+				       "please report this to %s\n",
+				       IBM_MAIL);
 				hotkey_all_mask = 0x080cU; /* FN+F12, FN+F4, FN+F3 */
+			}
 		}
 
 		res = hotkey_get(&hotkey_orig_status, &hotkey_orig_mask);
-- 
1.5.3.1

[PATCH 6/9] ACPI: thinkpad-acpi: dequeue all pending hot key events at once (v2.2)

[Henrique de Moraes Holschuh]

Receive all pending HKEY events at once from a single notification, and don't
complain if the queue is empty.

Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
---
 drivers/misc/thinkpad_acpi.c |   51 ++++++++++++++++++++++++++++--------------
 1 files changed, 34 insertions(+), 17 deletions(-)

diff --git a/drivers/misc/thinkpad_acpi.c b/drivers/misc/thinkpad_acpi.c
index 9a61140..3efe81b 100644
--- a/drivers/misc/thinkpad_acpi.c
+++ b/drivers/misc/thinkpad_acpi.c
@@ -1196,9 +1196,30 @@ static void hotkey_notify(struct ibm_struct *ibm, u32 event)
 {
 	u32 hkey;
 	unsigned int keycode, scancode;
-	int send_acpi_ev = 0;
+	int send_acpi_ev;
+
+	if (event != 0x80) {
+		printk(IBM_ERR "unknown HKEY notification event %d\n", event);
+		/* forward it to userspace, maybe it knows how to handle it */
+		acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
+						ibm->acpi->device->dev.bus_id,
+						event, 0);
+		return;
+	}
+
+	while (1) {
+		if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
+			printk(IBM_ERR "failed to retrieve HKEY event\n");
+			return;
+		}
+
+		if (hkey == 0) {
+			/* queue empty */
+			return;
+		}
+
+		send_acpi_ev = 0;
 
-	if (event == 0x80 && acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
 		switch (hkey >> 12) {
 		case 1:
 			/* 0x1000-0x1FFF: key presses */
@@ -1220,8 +1241,8 @@ static void hotkey_notify(struct ibm_struct *ibm, u32 event)
 			 * eat up known LID events */
 			if (hkey != 0x5001 && hkey != 0x5002) {
 				printk(IBM_ERR
-					"unknown LID-related hotkey event: 0x%04x\n",
-					hkey);
+				       "unknown LID-related HKEY event: 0x%04x\n",
+				       hkey);
 				send_acpi_ev = 1;
 			}
 			break;
@@ -1240,21 +1261,17 @@ static void hotkey_notify(struct ibm_struct *ibm, u32 event)
 			printk(IBM_NOTICE "unhandled HKEY event 0x%04x\n", hkey);
 			send_acpi_ev = 1;
 		}
-	} else {
-		printk(IBM_ERR "unknown hotkey notification event %d\n", event);
-		hkey = 0;
-		send_acpi_ev = 1;
-	}
 
-	/* Legacy events */
-	if (send_acpi_ev || hotkey_report_mode < 2)
-		acpi_bus_generate_proc_event(ibm->acpi->device, event, hkey);
+		/* Legacy events */
+		if (send_acpi_ev || hotkey_report_mode < 2)
+			acpi_bus_generate_proc_event(ibm->acpi->device, event, hkey);
 
-	/* netlink events */
-	if (send_acpi_ev) {
-		acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
-						ibm->acpi->device->dev.bus_id,
-						event, hkey);
+		/* netlink events */
+		if (send_acpi_ev) {
+			acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
+							ibm->acpi->device->dev.bus_id,
+							event, hkey);
+		}
 	}
 }
 
-- 
1.5.3.1

[PATCH 7/9] ACPI: thinkpad-acpi: fix regression on HKEY LID event handling

[Henrique de Moraes Holschuh]

We were letting ThinkPad-specific LID events through to userspace again,
instead of dropping them.  Fix it.  We don't want to give userspace the
option of not using generic LID handling.

Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
---
 drivers/misc/thinkpad_acpi.c |    9 +++++++--
 1 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/misc/thinkpad_acpi.c b/drivers/misc/thinkpad_acpi.c
index 3efe81b..0a33c6e 100644
--- a/drivers/misc/thinkpad_acpi.c
+++ b/drivers/misc/thinkpad_acpi.c
@@ -1197,6 +1197,7 @@ static void hotkey_notify(struct ibm_struct *ibm, u32 event)
 	u32 hkey;
 	unsigned int keycode, scancode;
 	int send_acpi_ev;
+	int ignore_acpi_ev;
 
 	if (event != 0x80) {
 		printk(IBM_ERR "unknown HKEY notification event %d\n", event);
@@ -1219,6 +1220,7 @@ static void hotkey_notify(struct ibm_struct *ibm, u32 event)
 		}
 
 		send_acpi_ev = 0;
+		ignore_acpi_ev = 0;
 
 		switch (hkey >> 12) {
 		case 1:
@@ -1244,6 +1246,8 @@ static void hotkey_notify(struct ibm_struct *ibm, u32 event)
 				       "unknown LID-related HKEY event: 0x%04x\n",
 				       hkey);
 				send_acpi_ev = 1;
+			} else {
+				ignore_acpi_ev = 1;
 			}
 			break;
 		case 7:
@@ -1263,11 +1267,12 @@ static void hotkey_notify(struct ibm_struct *ibm, u32 event)
 		}
 
 		/* Legacy events */
-		if (send_acpi_ev || hotkey_report_mode < 2)
+		if (!ignore_acpi_ev && (send_acpi_ev || hotkey_report_mode < 2)) {
 			acpi_bus_generate_proc_event(ibm->acpi->device, event, hkey);
+		}
 
 		/* netlink events */
-		if (send_acpi_ev) {
+		if (!ignore_acpi_ev && send_acpi_ev) {
 			acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
 							ibm->acpi->device->dev.bus_id,
 							event, hkey);
-- 
1.5.3.1

[PATCH 8/9] ACPI: thinkpad-acpi: use a separate platform device for hwmon and name it

[Henrique de Moraes Holschuh]

Use a separate platform device to attach hwmon attributes and class, and
add a name attribute of "thinkpad_hwmon" to it.  To do it properly, we
also register a new platform driver ("thinkpad_hwmon").

This makes thinkpad-acpi compatible with libsensors4 from lm-sensors, and
the platform driver and device split will make it much easier to separate
hwmon functionality into its own module later on.

Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Cc: LM Sensors ML <lm-sensors@lm-sensors.org>
---
 Documentation/thinkpad-acpi.txt |   24 +++++++++---
 drivers/misc/thinkpad_acpi.c    |   79 +++++++++++++++++++++++++++++++++------
 drivers/misc/thinkpad_acpi.h    |    6 ++-
 3 files changed, 90 insertions(+), 19 deletions(-)

diff --git a/Documentation/thinkpad-acpi.txt b/Documentation/thinkpad-acpi.txt
index 60953d6..029bb43 100644
--- a/Documentation/thinkpad-acpi.txt
+++ b/Documentation/thinkpad-acpi.txt
@@ -105,10 +105,15 @@ The version of thinkpad-acpi's sysfs interface is exported by the driver
 as a driver attribute (see below).
 
 Sysfs driver attributes are on the driver's sysfs attribute space,
-for 2.6.20 this is /sys/bus/platform/drivers/thinkpad_acpi/.
+for 2.6.20 this is /sys/bus/platform/drivers/thinkpad_acpi/ and
+/sys/bus/platform/drivers/thinkpad_hwmon/
 
-Sysfs device attributes are on the driver's sysfs attribute space,
-for 2.6.20 this is /sys/devices/platform/thinkpad_acpi/.
+Sysfs device attributes are on the thinkpad_acpi device sysfs attribute
+space, for 2.6.20 this is /sys/devices/platform/thinkpad_acpi/.
+
+Sysfs device attributes for the sensors and fan are on the
+thinkpad_hwmon device's sysfs attribute space, but you should locate it
+looking for a hwmon device with the name attribute of "thinkpad_hwmon".
 
 Driver version
 --------------
@@ -766,7 +771,7 @@ Temperature sensors
 -------------------
 
 procfs: /proc/acpi/ibm/thermal
-sysfs device attributes: (hwmon) temp*_input
+sysfs device attributes: (hwmon "thinkpad_hwmon") temp*_input
 
 Most ThinkPads include six or more separate temperature sensors but only
 expose the CPU temperature through the standard ACPI methods.  This
@@ -989,7 +994,9 @@ Fan control and monitoring: fan speed, fan enable/disable
 ---------------------------------------------------------
 
 procfs: /proc/acpi/ibm/fan
-sysfs device attributes: (hwmon) fan_input, pwm1, pwm1_enable
+sysfs device attributes: (hwmon "thinkpad_hwmon") fan_input, pwm1,
+			  pwm1_enable
+sysfs hwmon driver attributes: fan_watchdog
 
 NOTE NOTE NOTE: fan control operations are disabled by default for
 safety reasons.  To enable them, the module parameter "fan_control=1"
@@ -1131,7 +1138,7 @@ hwmon device attribute fan1_input:
 	which can take up to two minutes.  May return rubbish on older
 	ThinkPads.
 
-driver attribute fan_watchdog:
+hwmon driver attribute fan_watchdog:
 	Fan safety watchdog timer interval, in seconds.  Minimum is
 	1 second, maximum is 120 seconds.  0 disables the watchdog.
 
@@ -1233,3 +1240,8 @@ Sysfs interface changelog:
 		layer, the radio switch generates input event EV_RADIO,
 		and the driver enables hot key handling by default in
 		the firmware.
+
+0x020000:	ABI fix: added a separate hwmon platform device and
+		driver, which must be located by name (thinkpad_hwmon)
+		and the hwmon class for lm_sensors4 compatibility.
+		Moved all hwmon attributes to this new platform device.
diff --git a/drivers/misc/thinkpad_acpi.c b/drivers/misc/thinkpad_acpi.c
index 0a33c6e..a0d9925 100644
--- a/drivers/misc/thinkpad_acpi.c
+++ b/drivers/misc/thinkpad_acpi.c
@@ -22,7 +22,7 @@
  */
 
 #define IBM_VERSION "0.16"
-#define TPACPI_SYSFS_VERSION 0x010000
+#define TPACPI_SYSFS_VERSION 0x020000
 
 /*
  *  Changelog:
@@ -526,6 +526,7 @@ static char *next_cmd(char **cmds)
  ****************************************************************************/
 
 static struct platform_device *tpacpi_pdev;
+static struct platform_device *tpacpi_sensors_pdev;
 static struct class_device *tpacpi_hwmon;
 static struct input_dev *tpacpi_inputdev;
 static struct mutex tpacpi_inputdev_send_mutex;
@@ -553,6 +554,12 @@ static struct platform_driver tpacpi_pdriver = {
 	.resume = tpacpi_resume_handler,
 };
 
+static struct platform_driver tpacpi_hwmon_pdriver = {
+	.driver = {
+		.name = IBM_HWMON_DRVR_NAME,
+		.owner = THIS_MODULE,
+	},
+};
 
 /*************************************************************************
  * thinkpad-acpi driver attributes
@@ -2872,7 +2879,7 @@ static int __init thermal_init(struct ibm_init_struct *iibm)
 
 	switch(thermal_read_mode) {
 	case TPACPI_THERMAL_TPEC_16:
-		res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
+		res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
 				&thermal_temp_input16_group);
 		if (res)
 			return res;
@@ -2880,7 +2887,7 @@ static int __init thermal_init(struct ibm_init_struct *iibm)
 	case TPACPI_THERMAL_TPEC_8:
 	case TPACPI_THERMAL_ACPI_TMP07:
 	case TPACPI_THERMAL_ACPI_UPDT:
-		res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
+		res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
 				&thermal_temp_input8_group);
 		if (res)
 			return res;
@@ -2897,13 +2904,13 @@ static void thermal_exit(void)
 {
 	switch(thermal_read_mode) {
 	case TPACPI_THERMAL_TPEC_16:
-		sysfs_remove_group(&tpacpi_pdev->dev.kobj,
+		sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
 				   &thermal_temp_input16_group);
 		break;
 	case TPACPI_THERMAL_TPEC_8:
 	case TPACPI_THERMAL_ACPI_TMP07:
 	case TPACPI_THERMAL_ACPI_UPDT:
-		sysfs_remove_group(&tpacpi_pdev->dev.kobj,
+		sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
 				   &thermal_temp_input16_group);
 		break;
 	case TPACPI_THERMAL_NONE:
@@ -3686,7 +3693,7 @@ static struct device_attribute dev_attr_fan_fan1_input =
 	__ATTR(fan1_input, S_IRUGO,
 		fan_fan1_input_show, NULL);
 
-/* sysfs fan fan_watchdog (driver) ------------------------------------- */
+/* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */
 static ssize_t fan_fan_watchdog_show(struct device_driver *drv,
 				     char *buf)
 {
@@ -3828,10 +3835,10 @@ static int __init fan_init(struct ibm_init_struct *iibm)
 
 	if (fan_status_access_mode != TPACPI_FAN_NONE ||
 	    fan_control_access_mode != TPACPI_FAN_WR_NONE) {
-		rc = sysfs_create_group(&tpacpi_pdev->dev.kobj,
+		rc = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
 					 &fan_attr_group);
 		if (!(rc < 0))
-			rc = driver_create_file(&tpacpi_pdriver.driver,
+			rc = driver_create_file(&tpacpi_hwmon_pdriver.driver,
 					&driver_attr_fan_watchdog);
 		if (rc < 0)
 			return rc;
@@ -3914,8 +3921,8 @@ static void fan_exit(void)
 	vdbg_printk(TPACPI_DBG_EXIT, "cancelling any pending fan watchdog tasks\n");
 
 	/* FIXME: can we really do this unconditionally? */
-	sysfs_remove_group(&tpacpi_pdev->dev.kobj, &fan_attr_group);
-	driver_remove_file(&tpacpi_pdriver.driver, &driver_attr_fan_watchdog);
+	sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, &fan_attr_group);
+	driver_remove_file(&tpacpi_hwmon_pdriver.driver, &driver_attr_fan_watchdog);
 
 	cancel_delayed_work(&fan_watchdog_task);
 	flush_scheduled_work();
@@ -4366,6 +4373,19 @@ static struct ibm_struct fan_driver_data = {
  ****************************************************************************
  ****************************************************************************/
 
+/* sysfs name ---------------------------------------------------------- */
+static ssize_t thinkpad_acpi_pdev_name_show(struct device *dev,
+			   struct device_attribute *attr,
+			   char *buf)
+{
+	return snprintf(buf, PAGE_SIZE, "%s\n", IBM_HWMON_DRVR_NAME);
+}
+
+static struct device_attribute dev_attr_thinkpad_acpi_pdev_name =
+	__ATTR(name, S_IRUGO, thinkpad_acpi_pdev_name_show, NULL);
+
+/* --------------------------------------------------------------------- */
+
 /* /proc support */
 static struct proc_dir_entry *proc_dir;
 
@@ -4768,12 +4788,20 @@ static int __init thinkpad_acpi_module_init(void)
 
 	ret = platform_driver_register(&tpacpi_pdriver);
 	if (ret) {
-		printk(IBM_ERR "unable to register platform driver\n");
+		printk(IBM_ERR "unable to register main platform driver\n");
 		thinkpad_acpi_module_exit();
 		return ret;
 	}
 	tp_features.platform_drv_registered = 1;
 
+	ret = platform_driver_register(&tpacpi_hwmon_pdriver);
+	if (ret) {
+		printk(IBM_ERR "unable to register hwmon platform driver\n");
+		thinkpad_acpi_module_exit();
+		return ret;
+	}
+	tp_features.sensors_pdrv_registered = 1;
+
 	ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
 	if (ret) {
 		printk(IBM_ERR "unable to create sysfs driver attributes\n");
@@ -4793,7 +4821,26 @@ static int __init thinkpad_acpi_module_init(void)
 		thinkpad_acpi_module_exit();
 		return ret;
 	}
-	tpacpi_hwmon = hwmon_device_register(&tpacpi_pdev->dev);
+	tpacpi_sensors_pdev = platform_device_register_simple(
+							IBM_HWMON_DRVR_NAME,
+							-1, NULL, 0);
+	if (IS_ERR(tpacpi_sensors_pdev)) {
+		ret = PTR_ERR(tpacpi_sensors_pdev);
+		tpacpi_sensors_pdev = NULL;
+		printk(IBM_ERR "unable to register hwmon platform device\n");
+		thinkpad_acpi_module_exit();
+		return ret;
+	}
+	ret = device_create_file(&tpacpi_sensors_pdev->dev,
+				 &dev_attr_thinkpad_acpi_pdev_name);
+	if (ret) {
+		printk(IBM_ERR
+			"unable to create sysfs hwmon device attributes\n");
+		thinkpad_acpi_module_exit();
+		return ret;
+	}
+	tp_features.sensors_pdev_attrs_registered = 1;
+	tpacpi_hwmon = hwmon_device_register(&tpacpi_sensors_pdev->dev);
 	if (IS_ERR(tpacpi_hwmon)) {
 		ret = PTR_ERR(tpacpi_hwmon);
 		tpacpi_hwmon = NULL;
@@ -4864,12 +4911,20 @@ static void thinkpad_acpi_module_exit(void)
 	if (tpacpi_hwmon)
 		hwmon_device_unregister(tpacpi_hwmon);
 
+	if (tp_features.sensors_pdev_attrs_registered)
+		device_remove_file(&tpacpi_sensors_pdev->dev,
+				   &dev_attr_thinkpad_acpi_pdev_name);
+	if (tpacpi_sensors_pdev)
+		platform_device_unregister(tpacpi_sensors_pdev);
 	if (tpacpi_pdev)
 		platform_device_unregister(tpacpi_pdev);
 
 	if (tp_features.platform_drv_attrs_registered)
 		tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
 
+	if (tp_features.sensors_pdrv_registered)
+		platform_driver_unregister(&tpacpi_hwmon_pdriver);
+
 	if (tp_features.platform_drv_registered)
 		platform_driver_unregister(&tpacpi_pdriver);
 
diff --git a/drivers/misc/thinkpad_acpi.h b/drivers/misc/thinkpad_acpi.h
index fa64ded..791b8ca 100644
--- a/drivers/misc/thinkpad_acpi.h
+++ b/drivers/misc/thinkpad_acpi.h
@@ -58,13 +58,14 @@
 
 #define IBM_NAME "thinkpad"
 #define IBM_DESC "ThinkPad ACPI Extras"
-#define IBM_FILE "thinkpad_acpi"
+#define IBM_FILE IBM_NAME "_acpi"
 #define IBM_URL "http://ibm-acpi.sf.net/"
 #define IBM_MAIL "ibm-acpi-devel@lists.sourceforge.net"
 
 #define IBM_PROC_DIR "ibm"
 #define IBM_ACPI_EVENT_PREFIX "ibm"
 #define IBM_DRVR_NAME IBM_FILE
+#define IBM_HWMON_DRVR_NAME IBM_NAME "_hwmon"
 
 #define IBM_LOG IBM_FILE ": "
 #define IBM_ERR	   KERN_ERR    IBM_LOG
@@ -171,6 +172,7 @@ static int parse_strtoul(const char *buf, unsigned long max,
 
 /* Device model */
 static struct platform_device *tpacpi_pdev;
+static struct platform_device *tpacpi_sensors_pdev;
 static struct class_device *tpacpi_hwmon;
 static struct platform_driver tpacpi_pdriver;
 static struct input_dev *tpacpi_inputdev;
@@ -249,6 +251,8 @@ static struct {
 	u32 input_device_registered:1;
 	u32 platform_drv_registered:1;
 	u32 platform_drv_attrs_registered:1;
+	u32 sensors_pdrv_registered:1;
+	u32 sensors_pdev_attrs_registered:1;
 } tp_features;
 
 struct thinkpad_id_data {
-- 
1.5.3.1

[PATCH 9/9] ACPI: thinkpad-acpi: duplicate driver attributes to new hwmon pdrv

[Henrique de Moraes Holschuh]

Thinkpad-acpi has some driver attributes (debug level, sysfs interface
version, etc) that also belong to the new hwmon driver.  Duplicate them
there.

Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
---
 drivers/misc/thinkpad_acpi.c |    8 +++++++-
 drivers/misc/thinkpad_acpi.h |    1 +
 2 files changed, 8 insertions(+), 1 deletions(-)

diff --git a/drivers/misc/thinkpad_acpi.c b/drivers/misc/thinkpad_acpi.c
index a0d9925..5d51c03 100644
--- a/drivers/misc/thinkpad_acpi.c
+++ b/drivers/misc/thinkpad_acpi.c
@@ -4803,12 +4803,16 @@ static int __init thinkpad_acpi_module_init(void)
 	tp_features.sensors_pdrv_registered = 1;
 
 	ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
+	if (!ret) {
+		tp_features.platform_drv_attrs_registered = 1;
+		ret = tpacpi_create_driver_attributes(&tpacpi_hwmon_pdriver.driver);
+	}
 	if (ret) {
 		printk(IBM_ERR "unable to create sysfs driver attributes\n");
 		thinkpad_acpi_module_exit();
 		return ret;
 	}
-	tp_features.platform_drv_attrs_registered = 1;
+	tp_features.sensors_pdrv_attrs_registered = 1;
 
 
 	/* Device initialization */
@@ -4919,6 +4923,8 @@ static void thinkpad_acpi_module_exit(void)
 	if (tpacpi_pdev)
 		platform_device_unregister(tpacpi_pdev);
 
+	if (tp_features.sensors_pdrv_attrs_registered)
+		tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver);
 	if (tp_features.platform_drv_attrs_registered)
 		tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
 
diff --git a/drivers/misc/thinkpad_acpi.h b/drivers/misc/thinkpad_acpi.h
index 791b8ca..c5fdd68 100644
--- a/drivers/misc/thinkpad_acpi.h
+++ b/drivers/misc/thinkpad_acpi.h
@@ -252,6 +252,7 @@ static struct {
 	u32 platform_drv_registered:1;
 	u32 platform_drv_attrs_registered:1;
 	u32 sensors_pdrv_registered:1;
+	u32 sensors_pdrv_attrs_registered:1;
 	u32 sensors_pdev_attrs_registered:1;
 } tp_features;
 
-- 
1.5.3.1

Re: [GIT PATCH v3.1] thinkpad-acpi changes for the merge window (part 1)

[Len Brown]

Okay, 
previous series replaced with this one.

thanks,
-Len

On Sunday 23 September 2007 10:38, Henrique de Moraes Holschuh wrote:
> Len,
> 
> Here is the third version (fixed) of the first batch of changes for
> thinkpad-acpi, targetted at the next merge window.   They're mostly
> non-critical fixes.
> 
> I have found a stupid bug on v2 and v2.1 of patch 6, and fixed it
> (hopefully correctly, this time). I am *really* sorry about that.
> 
> I have also added two new patches, that were going to be sent as part 2,
> but I might as well just send them in right now.
> 
> Patches 8 and 9 *fix* a big ABI problem with the way thinkpad-acpi was
> exporting the hwmon attributes, which precluded it from working with
> lm-sensors(!).  Since I am already touching the ABI, it also prepares
> the thinkpad-acpi sensors ABI for a module split (so I can shunt all the
> hwmon code to a new module later, and userspace won't even notice).
> 
> Please merge this batch to acpi-test.  It replaces previous versions of
> "thinkpad-acpi changes for the merge window (part 1)".
> 
> As usual, the patch set is available at:
> git://repo.or.cz/linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git for-upstream/acpi-test
> 
> Shortlog of the above branch:
> 
> Henrique de Moraes Holschuh (9):
>       ACPI: thinkpad-acpi: make room for more features in tp_features bitfield
>       ACPI: thinkpad-acpi: issue EV_SYNC after EV_SWITCH
>       ACPI: thinkpad-acpi: add mutex-based locking to input device event send path
>       ACPI: thinkpad-acpi: keep track of module state
>       ACPI: thinkpad-acpi: check version of hot key firmware
>       ACPI: thinkpad-acpi: dequeue all pending hot key events at once (v2.2)
>       ACPI: thinkpad-acpi: fix regression on HKEY LID event handling
>       ACPI: thinkpad-acpi: use a separate platform device for hwmon and name it
>       ACPI: thinkpad-acpi: duplicate driver attributes to new hwmon pdrv
> 
> Thanks.
>