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authorLinus Torvalds <torvalds@linux-foundation.org>2010-08-04 10:44:06 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2010-08-04 10:44:06 -0700
commitc145307a110c14d09d5d92ff3c49dc0940e44b80 (patch)
treecba923818dea8857022de06ffd94ec6b2967aa1f /Documentation
parent5e83f6fbdb020b70c0e413312801424d13c58d68 (diff)
parent1a14703d6b20010401ca273ac1f07bff7992aa2c (diff)
downloadop-kernel-dev-c145307a110c14d09d5d92ff3c49dc0940e44b80.zip
op-kernel-dev-c145307a110c14d09d5d92ff3c49dc0940e44b80.tar.gz
Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mjg59/platform-drivers-x86
* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mjg59/platform-drivers-x86: (88 commits) ips driver: make it less chatty intel_scu_ipc: fix size field for intel_scu_ipc_command intel_scu_ipc: return -EIO for error condition in busy_loop intel_scu_ipc: fix data packing of PMIC command on Moorestown Clean up command packing on MRST. zero the stack buffer before giving random garbage to the SCU Fix stack buffer size for IPC writev messages intel_scu_ipc: Use the new cpu identification function intel_scu_ipc: tidy up unused bits Remove indirect read write api support. intel_scu_ipc: Support Medfield processors intel_scu_ipc: detect CPU type automatically x86 plat: limit x86 platform driver menu to X86 acpi ec_sys: Be more cautious about ec write access acpi ec: Fix possible double io port registration hp-wmi: acpi_drivers.h is already included through acpi.h two lines below hp-wmi: Fix mixing up of and/or directive dell-laptop: make dell_laptop_i8042_filter() static asus-laptop: fix asus_input_init error path msi-wmi: make needlessly global symbols static ...
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/ABI/testing/debugfs-ec20
-rw-r--r--Documentation/laptops/thinkpad-acpi.txt71
2 files changed, 31 insertions, 60 deletions
diff --git a/Documentation/ABI/testing/debugfs-ec b/Documentation/ABI/testing/debugfs-ec
new file mode 100644
index 0000000..6546115
--- /dev/null
+++ b/Documentation/ABI/testing/debugfs-ec
@@ -0,0 +1,20 @@
+What: /sys/kernel/debug/ec/*/{gpe,use_global_lock,io}
+Date: July 2010
+Contact: Thomas Renninger <trenn@suse.de>
+Description:
+
+General information like which GPE is assigned to the EC and whether
+the global lock should get used.
+Knowing the EC GPE one can watch the amount of HW events related to
+the EC here (XY -> GPE number from /sys/kernel/debug/ec/*/gpe):
+/sys/firmware/acpi/interrupts/gpeXY
+
+The io file is binary and a userspace tool located here:
+ftp://ftp.suse.com/pub/people/trenn/sources/ec/
+should get used to read out the 256 Embedded Controller registers
+or writing to them.
+
+CAUTION: Do not write to the Embedded Controller if you don't know
+what you are doing! Rebooting afterwards also is a good idea.
+This can influence the way your machine is cooled and fans may
+not get switched on again after you did a wrong write.
diff --git a/Documentation/laptops/thinkpad-acpi.txt b/Documentation/laptops/thinkpad-acpi.txt
index fc15538..f6f8025 100644
--- a/Documentation/laptops/thinkpad-acpi.txt
+++ b/Documentation/laptops/thinkpad-acpi.txt
@@ -960,70 +960,21 @@ Sysfs notes:
subsystem, and follow all of the hwmon guidelines at
Documentation/hwmon.
+EXPERIMENTAL: Embedded controller register dump
+-----------------------------------------------
-EXPERIMENTAL: Embedded controller register dump -- /proc/acpi/ibm/ecdump
-------------------------------------------------------------------------
-
-This feature is marked EXPERIMENTAL because the implementation
-directly accesses hardware registers and may not work as expected. USE
-WITH CAUTION! To use this feature, you need to supply the
-experimental=1 parameter when loading the module.
-
-This feature dumps the values of 256 embedded controller
-registers. Values which have changed since the last time the registers
-were dumped are marked with a star:
-
-[root@x40 ibm-acpi]# cat /proc/acpi/ibm/ecdump
-EC +00 +01 +02 +03 +04 +05 +06 +07 +08 +09 +0a +0b +0c +0d +0e +0f
-EC 0x00: a7 47 87 01 fe 96 00 08 01 00 cb 00 00 00 40 00
-EC 0x10: 00 00 ff ff f4 3c 87 09 01 ff 42 01 ff ff 0d 00
-EC 0x20: 00 00 00 00 00 00 00 00 00 00 00 03 43 00 00 80
-EC 0x30: 01 07 1a 00 30 04 00 00 *85 00 00 10 00 50 00 00
-EC 0x40: 00 00 00 00 00 00 14 01 00 04 00 00 00 00 00 00
-EC 0x50: 00 c0 02 0d 00 01 01 02 02 03 03 03 03 *bc *02 *bc
-EC 0x60: *02 *bc *02 00 00 00 00 00 00 00 00 00 00 00 00 00
-EC 0x70: 00 00 00 00 00 12 30 40 *24 *26 *2c *27 *20 80 *1f 80
-EC 0x80: 00 00 00 06 *37 *0e 03 00 00 00 0e 07 00 00 00 00
-EC 0x90: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
-EC 0xa0: *ff 09 ff 09 ff ff *64 00 *00 *00 *a2 41 *ff *ff *e0 00
-EC 0xb0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
-EC 0xc0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
-EC 0xd0: 03 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
-EC 0xe0: 00 00 00 00 00 00 00 00 11 20 49 04 24 06 55 03
-EC 0xf0: 31 55 48 54 35 38 57 57 08 2f 45 73 07 65 6c 1a
-
-This feature can be used to determine the register holding the fan
-speed on some models. To do that, do the following:
+This feature is not included in the thinkpad driver anymore.
+Instead the EC can be accessed through /sys/kernel/debug/ec with
+a userspace tool which can be found here:
+ftp://ftp.suse.com/pub/people/trenn/sources/ec
+Use it to determine the register holding the fan
+speed on some models. To do that, do the following:
- make sure the battery is fully charged
- make sure the fan is running
- - run 'cat /proc/acpi/ibm/ecdump' several times, once per second or so
-
-The first step makes sure various charging-related values don't
-vary. The second ensures that the fan-related values do vary, since
-the fan speed fluctuates a bit. The third will (hopefully) mark the
-fan register with a star:
-
-[root@x40 ibm-acpi]# cat /proc/acpi/ibm/ecdump
-EC +00 +01 +02 +03 +04 +05 +06 +07 +08 +09 +0a +0b +0c +0d +0e +0f
-EC 0x00: a7 47 87 01 fe 96 00 08 01 00 cb 00 00 00 40 00
-EC 0x10: 00 00 ff ff f4 3c 87 09 01 ff 42 01 ff ff 0d 00
-EC 0x20: 00 00 00 00 00 00 00 00 00 00 00 03 43 00 00 80
-EC 0x30: 01 07 1a 00 30 04 00 00 85 00 00 10 00 50 00 00
-EC 0x40: 00 00 00 00 00 00 14 01 00 04 00 00 00 00 00 00
-EC 0x50: 00 c0 02 0d 00 01 01 02 02 03 03 03 03 bc 02 bc
-EC 0x60: 02 bc 02 00 00 00 00 00 00 00 00 00 00 00 00 00
-EC 0x70: 00 00 00 00 00 12 30 40 24 27 2c 27 21 80 1f 80
-EC 0x80: 00 00 00 06 *be 0d 03 00 00 00 0e 07 00 00 00 00
-EC 0x90: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
-EC 0xa0: ff 09 ff 09 ff ff 64 00 00 00 a2 41 ff ff e0 00
-EC 0xb0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
-EC 0xc0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
-EC 0xd0: 03 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
-EC 0xe0: 00 00 00 00 00 00 00 00 11 20 49 04 24 06 55 03
-EC 0xf0: 31 55 48 54 35 38 57 57 08 2f 45 73 07 65 6c 1a
-
-Another set of values that varies often is the temperature
+ - use above mentioned tool to read out the EC
+
+Often fan and temperature values vary between
readings. Since temperatures don't change vary fast, you can take
several quick dumps to eliminate them.
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