Register thinkpad-acpi platform driver and platform device for the device
model. Also register the platform device with the hwmon class.
Signed-off-by: Henrique de Moraes Holschuh <hmh@xxxxxxxxxx>
---
Documentation/thinkpad-acpi.txt | 40 ++++++++++++++++++++++++----
drivers/misc/Kconfig | 1 +
drivers/misc/thinkpad_acpi.c | 54 +++++++++++++++++++++++++++++++++++++++
drivers/misc/thinkpad_acpi.h | 8 ++++++
4 files changed, 97 insertions(+), 6 deletions(-)
diff --git a/Documentation/thinkpad-acpi.txt b/Documentation/thinkpad-acpi.txt
index 1a42b77..0e4e053 100644
--- a/Documentation/thinkpad-acpi.txt
+++ b/Documentation/thinkpad-acpi.txt
@@ -1,7 +1,7 @@
ThinkPad ACPI Extras Driver
Version 0.14
- March 26th, 2007
+ April 21st, 2007
Borislav Deianov <borislav@xxxxxxxxxxxx>
Henrique de Moraes Holschuh <hmh@xxxxxxxxxx>
@@ -67,11 +67,39 @@ thinkpad-specific bay functionality.
Features
--------
-The driver creates the /proc/acpi/ibm directory. There is a file under
-that directory for each feature described below. Note that while the
-driver is still in the alpha stage, the exact proc file format and
-commands supported by the various features is guaranteed to change
-frequently.
+The driver exports two different interfaces to userspace, which can be
+used to access the features it provides. One is a legacy procfs-based
+interface, which will be removed at some time in the distant future.
+The other is a new sysfs-based interface which is not complete yet.
+
+The procfs interface creates the /proc/acpi/ibm directory. There is a
+file under that directory for each feature it supports. The procfs
+interface is mostly frozen, and will change very little if at all: it
+will not be extended to add any new functionality in the driver, instead
+all new functionality will be implemented on the sysfs interface.
+
+The sysfs interface tries to blend in the generic Linux sysfs subsystems
+and classes as much as possible. Since some of these subsystems are not
+yet ready or stabilized, it is expected that this interface will change,
+and any and all userspace programs must deal with it.
+
+
+Notes about the sysfs interface:
+
+Unlike what was done with the procfs interface, correctness when talking
+to the sysfs interfaces will be enforced, as will correctness in the
+thinkpad-acpi's implementation of sysfs interfaces.
+
+Also, any bugs in the thinkpad-acpi sysfs driver code or in the
+thinkpad-acpi's implementation of the sysfs interfaces will be fixed for
+maximum correctness, even if that means changing an interface in
+non-compatible ways. As these interfaces mature both in the kernel and
+in thinkpad-acpi, such changes should become quite rare.
+
+Applications interfacing to the thinkpad-acpi sysfs interfaces must
+follow all sysfs guidelines and correctly process all errors (the sysfs
+interface makes extensive use of errors). File descriptors and open /
+close operations to the sysfs inodes must also be properly implemented.
Driver version -- /proc/acpi/ibm/driver
---------------------------------------
diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig
index 44e4c8f..445c4b1 100644
--- a/drivers/misc/Kconfig
+++ b/drivers/misc/Kconfig
@@ -126,6 +126,7 @@ config THINKPAD_ACPI
tristate "ThinkPad ACPI Laptop Extras"
depends on X86 && ACPI
select BACKLIGHT_CLASS_DEVICE
+ select HWMON
---help---
This is a driver for the IBM and Lenovo ThinkPad laptops. It adds
support for Fn-Fx key combinations, Bluetooth control, video
diff --git a/drivers/misc/thinkpad_acpi.c b/drivers/misc/thinkpad_acpi.c
index 9b4eea4..e47eaf7 100644
--- a/drivers/misc/thinkpad_acpi.c
+++ b/drivers/misc/thinkpad_acpi.c
@@ -477,6 +477,25 @@ static char *next_cmd(char **cmds)
/****************************************************************************
****************************************************************************
*
+ * Device model: hwmon and platform
+ *
+ ****************************************************************************
+ ****************************************************************************/
+
+static struct platform_device *tpacpi_pdev = NULL;
+static struct class_device *tpacpi_hwmon = NULL;
+
+static struct platform_driver tpacpi_pdriver = {
+ .driver = {
+ .name = IBM_DRVR_NAME,
+ .owner = THIS_MODULE,
+ },
+};
+
+
+/****************************************************************************
+ ****************************************************************************
+ *
* Subdrivers
*
****************************************************************************
@@ -3225,10 +3244,12 @@ static int __init thinkpad_acpi_module_init(void)
{
int ret, i;
+ /* Driver-level probe */
ret = probe_for_thinkpad();
if (ret)
return ret;
+ /* Driver initialization */
ibm_thinkpad_ec_found = check_dmi_for_ec();
IBM_ACPIHANDLE_INIT(ecrd);
IBM_ACPIHANDLE_INIT(ecwr);
@@ -3241,6 +3262,31 @@ static int __init thinkpad_acpi_module_init(void)
}
proc_dir->owner = THIS_MODULE;
+ ret = platform_driver_register(&tpacpi_pdriver);
+ if (ret) {
+ printk(IBM_ERR "unable to register platform driver\n");
+ thinkpad_acpi_module_exit();
+ return ret;
+ }
+
+ /* Device initialization */
+ tpacpi_pdev = platform_device_register_simple(IBM_DRVR_NAME, -1,
+ NULL, 0);
+ if (IS_ERR(tpacpi_pdev)) {
+ ret = PTR_ERR(tpacpi_pdev);
+ tpacpi_pdev = NULL;
+ printk(IBM_ERR "unable to register platform device\n");
+ thinkpad_acpi_module_exit();
+ return ret;
+ }
+ tpacpi_hwmon = hwmon_device_register(&tpacpi_pdev->dev);
+ if (IS_ERR(tpacpi_hwmon)) {
+ ret = PTR_ERR(tpacpi_hwmon);
+ tpacpi_hwmon = NULL;
+ printk(IBM_ERR "unable to register hwmon device\n");
+ thinkpad_acpi_module_exit();
+ return ret;
+ }
for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
ret = ibm_init(&ibms_init[i]);
if (ret >= 0 && *ibms_init[i].param)
@@ -3266,6 +3312,14 @@ static void thinkpad_acpi_module_exit(void)
dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
+ if (tpacpi_hwmon)
+ hwmon_device_unregister(tpacpi_hwmon);
+
+ if (tpacpi_pdev)
+ platform_device_unregister(tpacpi_pdev);
+
+ platform_driver_unregister(&tpacpi_pdriver);
+
if (proc_dir)
remove_proc_entry(IBM_PROC_DIR, acpi_root_dir);
diff --git a/drivers/misc/thinkpad_acpi.h b/drivers/misc/thinkpad_acpi.h
index 6432b28..fea5809 100644
--- a/drivers/misc/thinkpad_acpi.h
+++ b/drivers/misc/thinkpad_acpi.h
@@ -34,6 +34,8 @@
#include <linux/proc_fs.h>
#include <linux/backlight.h>
#include <linux/fb.h>
+#include <linux/platform_device.h>
+#include <linux/hwmon.h>
#include <asm/uaccess.h>
#include <linux/dmi.h>
@@ -56,6 +58,7 @@
#define IBM_PROC_DIR "ibm"
#define IBM_ACPI_EVENT_PREFIX "ibm"
+#define IBM_DRVR_NAME IBM_FILE
#define IBM_LOG IBM_FILE ": "
#define IBM_ERR KERN_ERR IBM_LOG
@@ -130,6 +133,11 @@ static int dispatch_procfs_write(struct file *file,
unsigned long count, void *data);
static char *next_cmd(char **cmds);
+/* Device model */
+static struct platform_device *tpacpi_pdev;
+static struct class_device *tpacpi_hwmon;
+static struct platform_driver tpacpi_pdriver;
+
/* Module */
static int experimental;
static u32 dbg_level;
--
1.5.1
-
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