diff options
| author | Antti Seppälä <a.seppala@gmail.com> | 2014-01-25 13:57:46 +0400 |
|---|---|---|
| committer | Mauro Carvalho Chehab <m.chehab@samsung.com> | 2014-02-04 23:47:26 +0400 |
| commit | dee88f4378d18b4e7ebca22c82dab2ed5dfd178c (patch) | |
| tree | f9bc8cd1588a365879955babe35d70dd1f692867 /drivers | |
| parent | 8d2b022911c2fa72085df39921dc5cd963bc159f (diff) | |
| download | linux-dee88f4378d18b4e7ebca22c82dab2ed5dfd178c.tar.xz | |
[media] nuvoton-cir: Don't touch PS/2 interrupts while initializing
There are reports[1] that on some motherboards loading the nuvoton-cir
disables PS/2 keyboard input. This is caused by an erroneous write of
CIR_INTR_MOUSE_IRQ_BIT to ACPI control register.
According to datasheet the write enables mouse power management event
interrupts which will probably have ill effects if the motherboard has
only one PS/2 port with keyboard in it.
The cir hardware does not need mouse interrupts to function and should
not touch them. This patch removes the illegal writes and registry
definitions.
[1] http://ubuntuforums.org/showthread.php?t=2106277&p=12461912&mode=threaded#post12461912
Reported-by: Bruno Maire <bruno.maire@besonet.ch>
Tested-by: Bruno Maire <bruno.maire@besonet.ch>
Signed-off-by: Antti Seppälä <a.seppala@gmail.com>
Acked-by: Jarod Wilson <jarod@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/media/rc/nuvoton-cir.c | 4 | ||||
| -rw-r--r-- | drivers/media/rc/nuvoton-cir.h | 1 |
2 files changed, 0 insertions, 5 deletions
diff --git a/drivers/media/rc/nuvoton-cir.c b/drivers/media/rc/nuvoton-cir.c index 21ee0dc1b7ec..b41e52e3471a 100644 --- a/drivers/media/rc/nuvoton-cir.c +++ b/drivers/media/rc/nuvoton-cir.c @@ -330,9 +330,6 @@ static void nvt_cir_wake_ldev_init(struct nvt_dev *nvt) /* Enable CIR Wake via PSOUT# (Pin60) */ nvt_set_reg_bit(nvt, CIR_WAKE_ENABLE_BIT, CR_ACPI_CIR_WAKE); - /* enable cir interrupt of mouse/keyboard IRQ event */ - nvt_set_reg_bit(nvt, CIR_INTR_MOUSE_IRQ_BIT, CR_ACPI_IRQ_EVENTS); - /* enable pme interrupt of cir wakeup event */ nvt_set_reg_bit(nvt, PME_INTR_CIR_PASS_BIT, CR_ACPI_IRQ_EVENTS2); @@ -456,7 +453,6 @@ static void nvt_enable_wake(struct nvt_dev *nvt) nvt_select_logical_dev(nvt, LOGICAL_DEV_ACPI); nvt_set_reg_bit(nvt, CIR_WAKE_ENABLE_BIT, CR_ACPI_CIR_WAKE); - nvt_set_reg_bit(nvt, CIR_INTR_MOUSE_IRQ_BIT, CR_ACPI_IRQ_EVENTS); nvt_set_reg_bit(nvt, PME_INTR_CIR_PASS_BIT, CR_ACPI_IRQ_EVENTS2); nvt_select_logical_dev(nvt, LOGICAL_DEV_CIR_WAKE); diff --git a/drivers/media/rc/nuvoton-cir.h b/drivers/media/rc/nuvoton-cir.h index 07e83108df0f..e1cf23c3875b 100644 --- a/drivers/media/rc/nuvoton-cir.h +++ b/drivers/media/rc/nuvoton-cir.h @@ -363,7 +363,6 @@ struct nvt_dev { #define LOGICAL_DEV_ENABLE 0x01 #define CIR_WAKE_ENABLE_BIT 0x08 -#define CIR_INTR_MOUSE_IRQ_BIT 0x80 #define PME_INTR_CIR_PASS_BIT 0x08 /* w83677hg CIR pin config */ |