Using IRQF_TRIGGER_LOW results in spi->irq = 0 after module reload #2263
Comments
|
Note that after applying this (debugging) patch: I get: type 2 = IRQ_TYPE_EDGE_FALLING So I wonder how this type gets set to IRQ_TYPE_EDGE_FALLING. |
|
For completeness here the request_irq portion of the code: You also can see the FALLING_LOW that does not show this behaviour... |
|
I have tried with the upstream 4.14.0-rc4 as well and the same issue shows there as well... |
|
Turns out that this needs to get set in the device tree as well to work correctly... |
pelwell
pushed a commit
to pelwell/linux
that referenced
this issue
Nov 14, 2017
The MCP2515 datasheet clearly describes a level-triggered interrupt pin. Therefore the receiving interrupt controller must also be configured for level-triggered operation otherwise there is a danger of a missed interrupt condition blocking all subsequent interrupts. The ONESHOT flag ensures that the interrupt is masked until the threaded interrupt handler exits. See: raspberrypi#2175 raspberrypi#2263 Signed-off-by: Phil Elwell <[email protected]>
|
See #2267. |
pelwell
pushed a commit
to pelwell/linux
that referenced
this issue
Nov 14, 2017
The MCP2515 datasheet clearly describes a level-triggered interrupt pin. Therefore the receiving interrupt controller must also be configured for level-triggered operation otherwise there is a danger of a missed interrupt condition blocking all subsequent interrupts. The ONESHOT flag ensures that the interrupt is masked until the threaded interrupt handler exits. Rather than change the flags globally (they must have worked for at least one user), allow the flags to be overridden from Device Tree in the event that the device has a DT node. See: raspberrypi#2175 raspberrypi#2263 Signed-off-by: Phil Elwell <[email protected]>
pelwell
pushed a commit
to pelwell/linux
that referenced
this issue
Nov 14, 2017
The MCP2515 datasheet clearly describes a level-triggered interrupt pin. Therefore the receiving interrupt controller must also be configured for level-triggered operation otherwise there is a danger of a missed interrupt condition blocking all subsequent interrupts. The ONESHOT flag ensures that the interrupt is masked until the threaded interrupt handler exits. Rather than change the flags globally (they must have worked for at least one user), allow the flags to be overridden from Device Tree in the event that the device has a DT node. See: raspberrypi#2175 raspberrypi#2263 Signed-off-by: Phil Elwell <[email protected]>
pelwell
pushed a commit
to pelwell/linux
that referenced
this issue
Nov 18, 2017
The MCP2515 datasheet clearly describes a level-triggered interrupt pin. Therefore the receiving interrupt controller must also be configured for level-triggered operation otherwise there is a danger of a missed interrupt condition blocking all subsequent interrupts. The ONESHOT flag ensures that the interrupt is masked until the threaded interrupt handler exits. Rather than change the flags globally (they must have worked for at least one user), allow the flags to be overridden from Device Tree in the event that the device has a DT node. See: raspberrypi#2175 raspberrypi#2263 Signed-off-by: Phil Elwell <[email protected]>
pelwell
pushed a commit
to pelwell/linux
that referenced
this issue
Nov 19, 2017
The MCP2515 datasheet clearly describes a level-triggered interrupt pin. Therefore the receiving interrupt controller must also be configured for level-triggered operation otherwise there is a danger of a missed interrupt condition blocking all subsequent interrupts. The ONESHOT flag ensures that the interrupt is masked until the threaded interrupt handler exits. Rather than change the flags globally (they must have worked for at least one user), allow the flags to be overridden from Device Tree in the event that the device has a DT node. See: raspberrypi#2175 raspberrypi#2263 Signed-off-by: Phil Elwell <[email protected]>
pelwell
pushed a commit
to pelwell/linux
that referenced
this issue
Nov 19, 2017
The MCP2515 datasheet clearly describes a level-triggered interrupt pin. Therefore the receiving interrupt controller must also be configured for level-triggered operation otherwise there is a danger of a missed interrupt condition blocking all subsequent interrupts. The ONESHOT flag ensures that the interrupt is masked until the threaded interrupt handler exits. Rather than change the flags globally (they must have worked for at least one user), allow the flags to be overridden from Device Tree in the event that the device has a DT node. See: raspberrypi#2175 raspberrypi#2263 Signed-off-by: Phil Elwell <[email protected]>
pelwell
pushed a commit
to pelwell/linux
that referenced
this issue
Nov 19, 2017
The MCP2515 datasheet clearly describes a level-triggered interrupt pin. Therefore the receiving interrupt controller must also be configured for level-triggered operation otherwise there is a danger of a missed interrupt condition blocking all subsequent interrupts. The ONESHOT flag ensures that the interrupt is masked until the threaded interrupt handler exits. Rather than change the flags globally (they must have worked for at least one user), allow the flags to be overridden from Device Tree in the event that the device has a DT node. See: raspberrypi#2175 raspberrypi#2263 Signed-off-by: Phil Elwell <[email protected]>
pelwell
pushed a commit
to pelwell/linux
that referenced
this issue
Nov 19, 2017
The MCP2515 datasheet clearly describes a level-triggered interrupt pin. Therefore the receiving interrupt controller must also be configured for level-triggered operation otherwise there is a danger of a missed interrupt condition blocking all subsequent interrupts. The ONESHOT flag ensures that the interrupt is masked until the threaded interrupt handler exits. Rather than change the flags globally (they must have worked for at least one user), allow the flags to be overridden from Device Tree in the event that the device has a DT node. See: raspberrypi#2175 raspberrypi#2263 Signed-off-by: Phil Elwell <[email protected]>
pelwell
pushed a commit
to pelwell/linux
that referenced
this issue
Nov 19, 2017
The MCP2515 datasheet clearly describes a level-triggered interrupt pin. Therefore the receiving interrupt controller must also be configured for level-triggered operation otherwise there is a danger of a missed interrupt condition blocking all subsequent interrupts. The ONESHOT flag ensures that the interrupt is masked until the threaded interrupt handler exits. Rather than change the flags globally (they must have worked for at least one user), allow the flags to be overridden from Device Tree in the event that the device has a DT node. See: raspberrypi#2175 raspberrypi#2263 Signed-off-by: Phil Elwell <[email protected]>
pelwell
pushed a commit
to pelwell/linux
that referenced
this issue
Nov 19, 2017
The MCP2515 datasheet clearly describes a level-triggered interrupt pin. Therefore the receiving interrupt controller must also be configured for level-triggered operation otherwise there is a danger of a missed interrupt condition blocking all subsequent interrupts. The ONESHOT flag ensures that the interrupt is masked until the threaded interrupt handler exits. Rather than change the flags globally (they must have worked for at least one user), allow the flags to be overridden from Device Tree in the event that the device has a DT node. See: raspberrypi#2175 raspberrypi#2263 Signed-off-by: Phil Elwell <[email protected]>
pelwell
pushed a commit
to pelwell/linux
that referenced
this issue
Nov 19, 2017
The MCP2515 datasheet clearly describes a level-triggered interrupt pin. Therefore the receiving interrupt controller must also be configured for level-triggered operation otherwise there is a danger of a missed interrupt condition blocking all subsequent interrupts. The ONESHOT flag ensures that the interrupt is masked until the threaded interrupt handler exits. Rather than change the flags globally (they must have worked for at least one user), allow the flags to be overridden from Device Tree in the event that the device has a DT node. See: raspberrypi#2175 raspberrypi#2263 Signed-off-by: Phil Elwell <[email protected]>
pelwell
pushed a commit
to pelwell/linux
that referenced
this issue
Nov 19, 2017
The MCP2515 datasheet clearly describes a level-triggered interrupt pin. Therefore the receiving interrupt controller must also be configured for level-triggered operation otherwise there is a danger of a missed interrupt condition blocking all subsequent interrupts. The ONESHOT flag ensures that the interrupt is masked until the threaded interrupt handler exits. Rather than change the flags globally (they must have worked for at least one user), allow the flags to be overridden from Device Tree in the event that the device has a DT node. See: raspberrypi#2175 raspberrypi#2263 Signed-off-by: Phil Elwell <[email protected]>
pelwell
pushed a commit
to pelwell/linux
that referenced
this issue
Nov 21, 2017
The MCP2515 datasheet clearly describes a level-triggered interrupt pin. Therefore the receiving interrupt controller must also be configured for level-triggered operation otherwise there is a danger of a missed interrupt condition blocking all subsequent interrupts. The ONESHOT flag ensures that the interrupt is masked until the threaded interrupt handler exits. Rather than change the flags globally (they must have worked for at least one user), allow the flags to be overridden from Device Tree in the event that the device has a DT node. See: raspberrypi#2175 raspberrypi#2263 Signed-off-by: Phil Elwell <[email protected]>
pelwell
pushed a commit
that referenced
this issue
Nov 21, 2017
The MCP2515 datasheet clearly describes a level-triggered interrupt pin. Therefore the receiving interrupt controller must also be configured for level-triggered operation otherwise there is a danger of a missed interrupt condition blocking all subsequent interrupts. The ONESHOT flag ensures that the interrupt is masked until the threaded interrupt handler exits. Rather than change the flags globally (they must have worked for at least one user), allow the flags to be overridden from Device Tree in the event that the device has a DT node. See: #2175 #2263 Signed-off-by: Phil Elwell <[email protected]>
popcornmix
pushed a commit
that referenced
this issue
Nov 21, 2017
The MCP2515 datasheet clearly describes a level-triggered interrupt pin. Therefore the receiving interrupt controller must also be configured for level-triggered operation otherwise there is a danger of a missed interrupt condition blocking all subsequent interrupts. The ONESHOT flag ensures that the interrupt is masked until the threaded interrupt handler exits. Rather than change the flags globally (they must have worked for at least one user), allow the flags to be overridden from Device Tree in the event that the device has a DT node. See: #2175 #2263 Signed-off-by: Phil Elwell <[email protected]>
popcornmix
pushed a commit
that referenced
this issue
Nov 24, 2017
The MCP2515 datasheet clearly describes a level-triggered interrupt pin. Therefore the receiving interrupt controller must also be configured for level-triggered operation otherwise there is a danger of a missed interrupt condition blocking all subsequent interrupts. The ONESHOT flag ensures that the interrupt is masked until the threaded interrupt handler exits. Rather than change the flags globally (they must have worked for at least one user), allow the flags to be overridden from Device Tree in the event that the device has a DT node. See: #2175 #2263 Signed-off-by: Phil Elwell <[email protected]>
pelwell
pushed a commit
that referenced
this issue
Nov 28, 2017
The MCP2515 datasheet clearly describes a level-triggered interrupt pin. Therefore the receiving interrupt controller must also be configured for level-triggered operation otherwise there is a danger of a missed interrupt condition blocking all subsequent interrupts. The ONESHOT flag ensures that the interrupt is masked until the threaded interrupt handler exits. Rather than change the flags globally (they must have worked for at least one user), allow the flags to be overridden from Device Tree in the event that the device has a DT node. See: #2175 #2263 Signed-off-by: Phil Elwell <[email protected]>
popcornmix
pushed a commit
that referenced
this issue
Dec 1, 2017
The MCP2515 datasheet clearly describes a level-triggered interrupt pin. Therefore the receiving interrupt controller must also be configured for level-triggered operation otherwise there is a danger of a missed interrupt condition blocking all subsequent interrupts. The ONESHOT flag ensures that the interrupt is masked until the threaded interrupt handler exits. Rather than change the flags globally (they must have worked for at least one user), allow the flags to be overridden from Device Tree in the event that the device has a DT node. See: #2175 #2263 Signed-off-by: Phil Elwell <[email protected]>
popcornmix
pushed a commit
that referenced
this issue
Dec 5, 2017
The MCP2515 datasheet clearly describes a level-triggered interrupt pin. Therefore the receiving interrupt controller must also be configured for level-triggered operation otherwise there is a danger of a missed interrupt condition blocking all subsequent interrupts. The ONESHOT flag ensures that the interrupt is masked until the threaded interrupt handler exits. Rather than change the flags globally (they must have worked for at least one user), allow the flags to be overridden from Device Tree in the event that the device has a DT node. See: #2175 #2263 Signed-off-by: Phil Elwell <[email protected]>
popcornmix
pushed a commit
that referenced
this issue
Dec 12, 2017
The MCP2515 datasheet clearly describes a level-triggered interrupt pin. Therefore the receiving interrupt controller must also be configured for level-triggered operation otherwise there is a danger of a missed interrupt condition blocking all subsequent interrupts. The ONESHOT flag ensures that the interrupt is masked until the threaded interrupt handler exits. Rather than change the flags globally (they must have worked for at least one user), allow the flags to be overridden from Device Tree in the event that the device has a DT node. See: #2175 #2263 Signed-off-by: Phil Elwell <[email protected]>
popcornmix
pushed a commit
that referenced
this issue
Dec 12, 2017
The MCP2515 datasheet clearly describes a level-triggered interrupt pin. Therefore the receiving interrupt controller must also be configured for level-triggered operation otherwise there is a danger of a missed interrupt condition blocking all subsequent interrupts. The ONESHOT flag ensures that the interrupt is masked until the threaded interrupt handler exits. Rather than change the flags globally (they must have worked for at least one user), allow the flags to be overridden from Device Tree in the event that the device has a DT node. See: #2175 #2263 Signed-off-by: Phil Elwell <[email protected]>
popcornmix
pushed a commit
that referenced
this issue
Dec 14, 2017
The MCP2515 datasheet clearly describes a level-triggered interrupt pin. Therefore the receiving interrupt controller must also be configured for level-triggered operation otherwise there is a danger of a missed interrupt condition blocking all subsequent interrupts. The ONESHOT flag ensures that the interrupt is masked until the threaded interrupt handler exits. Rather than change the flags globally (they must have worked for at least one user), allow the flags to be overridden from Device Tree in the event that the device has a DT node. See: #2175 #2263 Signed-off-by: Phil Elwell <[email protected]>
popcornmix
pushed a commit
that referenced
this issue
Dec 18, 2017
The MCP2515 datasheet clearly describes a level-triggered interrupt pin. Therefore the receiving interrupt controller must also be configured for level-triggered operation otherwise there is a danger of a missed interrupt condition blocking all subsequent interrupts. The ONESHOT flag ensures that the interrupt is masked until the threaded interrupt handler exits. Rather than change the flags globally (they must have worked for at least one user), allow the flags to be overridden from Device Tree in the event that the device has a DT node. See: #2175 #2263 Signed-off-by: Phil Elwell <[email protected]>
popcornmix
pushed a commit
that referenced
this issue
Oct 4, 2019
The MCP2515 datasheet clearly describes a level-triggered interrupt pin. Therefore the receiving interrupt controller must also be configured for level-triggered operation otherwise there is a danger of a missed interrupt condition blocking all subsequent interrupts. The ONESHOT flag ensures that the interrupt is masked until the threaded interrupt handler exits. Rather than change the flags globally (they must have worked for at least one user), allow the flags to be overridden from Device Tree in the event that the device has a DT node. See: #2175 #2263 Signed-off-by: Phil Elwell <[email protected]>
popcornmix
pushed a commit
that referenced
this issue
Oct 11, 2019
The MCP2515 datasheet clearly describes a level-triggered interrupt pin. Therefore the receiving interrupt controller must also be configured for level-triggered operation otherwise there is a danger of a missed interrupt condition blocking all subsequent interrupts. The ONESHOT flag ensures that the interrupt is masked until the threaded interrupt handler exits. Rather than change the flags globally (they must have worked for at least one user), allow the flags to be overridden from Device Tree in the event that the device has a DT node. See: #2175 #2263 Signed-off-by: Phil Elwell <[email protected]>
popcornmix
pushed a commit
that referenced
this issue
Oct 11, 2019
The MCP2515 datasheet clearly describes a level-triggered interrupt pin. Therefore the receiving interrupt controller must also be configured for level-triggered operation otherwise there is a danger of a missed interrupt condition blocking all subsequent interrupts. The ONESHOT flag ensures that the interrupt is masked until the threaded interrupt handler exits. Rather than change the flags globally (they must have worked for at least one user), allow the flags to be overridden from Device Tree in the event that the device has a DT node. See: #2175 #2263 Signed-off-by: Phil Elwell <[email protected]>
popcornmix
pushed a commit
that referenced
this issue
Oct 21, 2019
The MCP2515 datasheet clearly describes a level-triggered interrupt pin. Therefore the receiving interrupt controller must also be configured for level-triggered operation otherwise there is a danger of a missed interrupt condition blocking all subsequent interrupts. The ONESHOT flag ensures that the interrupt is masked until the threaded interrupt handler exits. Rather than change the flags globally (they must have worked for at least one user), allow the flags to be overridden from Device Tree in the event that the device has a DT node. See: #2175 #2263 Signed-off-by: Phil Elwell <[email protected]>
tkisky
pushed a commit
to boundarydevices/linux
that referenced
this issue
Oct 21, 2019
The MCP2515 datasheet clearly describes a level-triggered interrupt pin. Therefore the receiving interrupt controller must also be configured for level-triggered operation otherwise there is a danger of a missed interrupt condition blocking all subsequent interrupts. The ONESHOT flag ensures that the interrupt is masked until the threaded interrupt handler exits. Rather than change the flags globally (they must have worked for at least one user), keep the old behavior for for non DT devices. DT based devices specify the flags in their corresonding DT node. See: raspberrypi/linux#2175 raspberrypi/linux#2263 Signed-off-by: Phil Elwell <[email protected]> Tested-by: Sean Nyekjaer <[email protected]> Signed-off-by: Marc Kleine-Budde <[email protected]>
jason77-wang
pushed a commit
to jason77-wang/eoan-rpi-pull
that referenced
this issue
Oct 25, 2019
The MCP2515 datasheet clearly describes a level-triggered interrupt pin. Therefore the receiving interrupt controller must also be configured for level-triggered operation otherwise there is a danger of a missed interrupt condition blocking all subsequent interrupts. The ONESHOT flag ensures that the interrupt is masked until the threaded interrupt handler exits. Rather than change the flags globally (they must have worked for at least one user, allow the flags to be overridden from Device Tree in the event that the device has a DT node. See: raspberrypi/linux#2175 raspberrypi/linux#2263 Signed-off-by: Phil Elwell <[email protected]> (cherry picked from commit 8a23ccb8e8db6bb18e44d11b838e11dbc976b45f) https://github.com/raspberrypi/linux.git rpi-5.3.y) Signed-off-by: Hui Wang <[email protected]>
popcornmix
pushed a commit
that referenced
this issue
Nov 1, 2019
The MCP2515 datasheet clearly describes a level-triggered interrupt pin. Therefore the receiving interrupt controller must also be configured for level-triggered operation otherwise there is a danger of a missed interrupt condition blocking all subsequent interrupts. The ONESHOT flag ensures that the interrupt is masked until the threaded interrupt handler exits. Rather than change the flags globally (they must have worked for at least one user), allow the flags to be overridden from Device Tree in the event that the device has a DT node. See: #2175 #2263 Signed-off-by: Phil Elwell <[email protected]>
popcornmix
pushed a commit
that referenced
this issue
Nov 11, 2019
The MCP2515 datasheet clearly describes a level-triggered interrupt pin. Therefore the receiving interrupt controller must also be configured for level-triggered operation otherwise there is a danger of a missed interrupt condition blocking all subsequent interrupts. The ONESHOT flag ensures that the interrupt is masked until the threaded interrupt handler exits. Rather than change the flags globally (they must have worked for at least one user), allow the flags to be overridden from Device Tree in the event that the device has a DT node. See: #2175 #2263 Signed-off-by: Phil Elwell <[email protected]>
popcornmix
pushed a commit
that referenced
this issue
Nov 18, 2019
The MCP2515 datasheet clearly describes a level-triggered interrupt pin. Therefore the receiving interrupt controller must also be configured for level-triggered operation otherwise there is a danger of a missed interrupt condition blocking all subsequent interrupts. The ONESHOT flag ensures that the interrupt is masked until the threaded interrupt handler exits. Rather than change the flags globally (they must have worked for at least one user), allow the flags to be overridden from Device Tree in the event that the device has a DT node. See: #2175 #2263 Signed-off-by: Phil Elwell <[email protected]>
popcornmix
pushed a commit
that referenced
this issue
Nov 22, 2019
The MCP2515 datasheet clearly describes a level-triggered interrupt pin. Therefore the receiving interrupt controller must also be configured for level-triggered operation otherwise there is a danger of a missed interrupt condition blocking all subsequent interrupts. The ONESHOT flag ensures that the interrupt is masked until the threaded interrupt handler exits. Rather than change the flags globally (they must have worked for at least one user), allow the flags to be overridden from Device Tree in the event that the device has a DT node. See: #2175 #2263 Signed-off-by: Phil Elwell <[email protected]>
popcornmix
pushed a commit
that referenced
this issue
Nov 26, 2019
The MCP2515 datasheet clearly describes a level-triggered interrupt pin. Therefore the receiving interrupt controller must also be configured for level-triggered operation otherwise there is a danger of a missed interrupt condition blocking all subsequent interrupts. The ONESHOT flag ensures that the interrupt is masked until the threaded interrupt handler exits. Rather than change the flags globally (they must have worked for at least one user), allow the flags to be overridden from Device Tree in the event that the device has a DT node. See: #2175 #2263 Signed-off-by: Phil Elwell <[email protected]>
tkisky
pushed a commit
to boundarydevices/linux
that referenced
this issue
Nov 27, 2019
The MCP2515 datasheet clearly describes a level-triggered interrupt pin. Therefore the receiving interrupt controller must also be configured for level-triggered operation otherwise there is a danger of a missed interrupt condition blocking all subsequent interrupts. The ONESHOT flag ensures that the interrupt is masked until the threaded interrupt handler exits. Rather than change the flags globally (they must have worked for at least one user), keep the old behavior for for non DT devices. DT based devices specify the flags in their corresonding DT node. See: raspberrypi/linux#2175 raspberrypi/linux#2263 Signed-off-by: Phil Elwell <[email protected]> Tested-by: Sean Nyekjaer <[email protected]> Signed-off-by: Marc Kleine-Budde <[email protected]>
popcornmix
pushed a commit
that referenced
this issue
Nov 29, 2019
The MCP2515 datasheet clearly describes a level-triggered interrupt pin. Therefore the receiving interrupt controller must also be configured for level-triggered operation otherwise there is a danger of a missed interrupt condition blocking all subsequent interrupts. The ONESHOT flag ensures that the interrupt is masked until the threaded interrupt handler exits. Rather than change the flags globally (they must have worked for at least one user), allow the flags to be overridden from Device Tree in the event that the device has a DT node. See: #2175 #2263 Signed-off-by: Phil Elwell <[email protected]>
popcornmix
pushed a commit
that referenced
this issue
Dec 9, 2019
The MCP2515 datasheet clearly describes a level-triggered interrupt pin. Therefore the receiving interrupt controller must also be configured for level-triggered operation otherwise there is a danger of a missed interrupt condition blocking all subsequent interrupts. The ONESHOT flag ensures that the interrupt is masked until the threaded interrupt handler exits. Rather than change the flags globally (they must have worked for at least one user), allow the flags to be overridden from Device Tree in the event that the device has a DT node. See: #2175 #2263 Signed-off-by: Phil Elwell <[email protected]>
popcornmix
pushed a commit
that referenced
this issue
Dec 13, 2019
The MCP2515 datasheet clearly describes a level-triggered interrupt pin. Therefore the receiving interrupt controller must also be configured for level-triggered operation otherwise there is a danger of a missed interrupt condition blocking all subsequent interrupts. The ONESHOT flag ensures that the interrupt is masked until the threaded interrupt handler exits. Rather than change the flags globally (they must have worked for at least one user), allow the flags to be overridden from Device Tree in the event that the device has a DT node. See: #2175 #2263 Signed-off-by: Phil Elwell <[email protected]>
popcornmix
pushed a commit
that referenced
this issue
Jan 6, 2020
The MCP2515 datasheet clearly describes a level-triggered interrupt pin. Therefore the receiving interrupt controller must also be configured for level-triggered operation otherwise there is a danger of a missed interrupt condition blocking all subsequent interrupts. The ONESHOT flag ensures that the interrupt is masked until the threaded interrupt handler exits. Rather than change the flags globally (they must have worked for at least one user), allow the flags to be overridden from Device Tree in the event that the device has a DT node. See: #2175 #2263 Signed-off-by: Phil Elwell <[email protected]>
big-henry
pushed a commit
to big-henry/mirror_ubuntu-bionic-kernel
that referenced
this issue
Feb 17, 2020
The MCP2515 datasheet clearly describes a level-triggered interrupt pin. Therefore the receiving interrupt controller must also be configured for level-triggered operation otherwise there is a danger of a missed interrupt condition blocking all subsequent interrupts. The ONESHOT flag ensures that the interrupt is masked until the threaded interrupt handler exits. Rather than change the flags globally (they must have worked for at least one user, allow the flags to be overridden from Device Tree in the event that the device has a DT node. See: raspberrypi/linux#2175 raspberrypi/linux#2263 Signed-off-by: Phil Elwell <[email protected]> (cherry picked from commit 8a23ccb8e8db6bb18e44d11b838e11dbc976b45f) https://github.com/raspberrypi/linux.git rpi-5.3.y) Signed-off-by: Hui Wang <[email protected]>
big-henry
pushed a commit
to big-henry/mirror_ubuntu-bionic-kernel
that referenced
this issue
Feb 17, 2020
The MCP2515 datasheet clearly describes a level-triggered interrupt pin. Therefore the receiving interrupt controller must also be configured for level-triggered operation otherwise there is a danger of a missed interrupt condition blocking all subsequent interrupts. The ONESHOT flag ensures that the interrupt is masked until the threaded interrupt handler exits. Rather than change the flags globally (they must have worked for at least one user), allow the flags to be overridden from Device Tree in the event that the device has a DT node. See: raspberrypi/linux#2175 raspberrypi/linux#2263 Signed-off-by: Phil Elwell <[email protected]>
YadongQi
pushed a commit
to YadongQi/ubuntu-bionic
that referenced
this issue
Mar 10, 2020
The MCP2515 datasheet clearly describes a level-triggered interrupt pin. Therefore the receiving interrupt controller must also be configured for level-triggered operation otherwise there is a danger of a missed interrupt condition blocking all subsequent interrupts. The ONESHOT flag ensures that the interrupt is masked until the threaded interrupt handler exits. Rather than change the flags globally (they must have worked for at least one user), allow the flags to be overridden from Device Tree in the event that the device has a DT node. See: raspberrypi/linux#2175 raspberrypi/linux#2263 Signed-off-by: Phil Elwell <[email protected]>
tkisky
pushed a commit
to boundarydevices/linux
that referenced
this issue
Mar 20, 2020
The MCP2515 datasheet clearly describes a level-triggered interrupt pin. Therefore the receiving interrupt controller must also be configured for level-triggered operation otherwise there is a danger of a missed interrupt condition blocking all subsequent interrupts. The ONESHOT flag ensures that the interrupt is masked until the threaded interrupt handler exits. Rather than change the flags globally (they must have worked for at least one user), keep the old behavior for for non DT devices. DT based devices specify the flags in their corresonding DT node. See: raspberrypi/linux#2175 raspberrypi/linux#2263 Signed-off-by: Phil Elwell <[email protected]> Tested-by: Sean Nyekjaer <[email protected]> Signed-off-by: Marc Kleine-Budde <[email protected]>
tkisky
pushed a commit
to boundarydevices/linux
that referenced
this issue
Mar 21, 2020
The MCP2515 datasheet clearly describes a level-triggered interrupt pin. Therefore the receiving interrupt controller must also be configured for level-triggered operation otherwise there is a danger of a missed interrupt condition blocking all subsequent interrupts. The ONESHOT flag ensures that the interrupt is masked until the threaded interrupt handler exits. Rather than change the flags globally (they must have worked for at least one user), keep the old behavior for for non DT devices. DT based devices specify the flags in their corresonding DT node. See: raspberrypi/linux#2175 raspberrypi/linux#2263 Signed-off-by: Phil Elwell <[email protected]> Tested-by: Sean Nyekjaer <[email protected]> Signed-off-by: Marc Kleine-Budde <[email protected]>
gibsson
pushed a commit
to boundarydevices/linux
that referenced
this issue
Apr 2, 2020
The MCP2515 datasheet clearly describes a level-triggered interrupt pin. Therefore the receiving interrupt controller must also be configured for level-triggered operation otherwise there is a danger of a missed interrupt condition blocking all subsequent interrupts. The ONESHOT flag ensures that the interrupt is masked until the threaded interrupt handler exits. Rather than change the flags globally (they must have worked for at least one user), keep the old behavior for for non DT devices. DT based devices specify the flags in their corresonding DT node. See: raspberrypi/linux#2175 raspberrypi/linux#2263 Signed-off-by: Phil Elwell <[email protected]> Tested-by: Sean Nyekjaer <[email protected]> Signed-off-by: Marc Kleine-Budde <[email protected]>
gibsson
pushed a commit
to boundarydevices/linux
that referenced
this issue
Apr 3, 2020
The MCP2515 datasheet clearly describes a level-triggered interrupt pin. Therefore the receiving interrupt controller must also be configured for level-triggered operation otherwise there is a danger of a missed interrupt condition blocking all subsequent interrupts. The ONESHOT flag ensures that the interrupt is masked until the threaded interrupt handler exits. Rather than change the flags globally (they must have worked for at least one user), keep the old behavior for for non DT devices. DT based devices specify the flags in their corresonding DT node. See: raspberrypi/linux#2175 raspberrypi/linux#2263 Signed-off-by: Phil Elwell <[email protected]> Tested-by: Sean Nyekjaer <[email protected]> Signed-off-by: Marc Kleine-Budde <[email protected]>
gibsson
pushed a commit
to boundarydevices/linux
that referenced
this issue
May 1, 2020
The MCP2515 datasheet clearly describes a level-triggered interrupt pin. Therefore the receiving interrupt controller must also be configured for level-triggered operation otherwise there is a danger of a missed interrupt condition blocking all subsequent interrupts. The ONESHOT flag ensures that the interrupt is masked until the threaded interrupt handler exits. Rather than change the flags globally (they must have worked for at least one user), keep the old behavior for for non DT devices. DT based devices specify the flags in their corresonding DT node. See: raspberrypi/linux#2175 raspberrypi/linux#2263 Signed-off-by: Phil Elwell <[email protected]> Tested-by: Sean Nyekjaer <[email protected]> Signed-off-by: Marc Kleine-Budde <[email protected]>
gibsson
pushed a commit
to boundarydevices/linux
that referenced
this issue
May 6, 2020
The MCP2515 datasheet clearly describes a level-triggered interrupt pin. Therefore the receiving interrupt controller must also be configured for level-triggered operation otherwise there is a danger of a missed interrupt condition blocking all subsequent interrupts. The ONESHOT flag ensures that the interrupt is masked until the threaded interrupt handler exits. Rather than change the flags globally (they must have worked for at least one user), keep the old behavior for for non DT devices. DT based devices specify the flags in their corresonding DT node. See: raspberrypi/linux#2175 raspberrypi/linux#2263 Signed-off-by: Phil Elwell <[email protected]> Tested-by: Sean Nyekjaer <[email protected]> Signed-off-by: Marc Kleine-Budde <[email protected]>
gibsson
pushed a commit
to boundarydevices/linux
that referenced
this issue
May 11, 2020
The MCP2515 datasheet clearly describes a level-triggered interrupt pin. Therefore the receiving interrupt controller must also be configured for level-triggered operation otherwise there is a danger of a missed interrupt condition blocking all subsequent interrupts. The ONESHOT flag ensures that the interrupt is masked until the threaded interrupt handler exits. Rather than change the flags globally (they must have worked for at least one user), keep the old behavior for for non DT devices. DT based devices specify the flags in their corresonding DT node. See: raspberrypi/linux#2175 raspberrypi/linux#2263 Signed-off-by: Phil Elwell <[email protected]> Tested-by: Sean Nyekjaer <[email protected]> Signed-off-by: Marc Kleine-Budde <[email protected]>
jai-raptee
pushed a commit
to jai-raptee/iliteck1
that referenced
this issue
Apr 30, 2024
The MCP2515 datasheet clearly describes a level-triggered interrupt pin. Therefore the receiving interrupt controller must also be configured for level-triggered operation otherwise there is a danger of a missed interrupt condition blocking all subsequent interrupts. The ONESHOT flag ensures that the interrupt is masked until the threaded interrupt handler exits. Rather than change the flags globally (they must have worked for at least one user), allow the flags to be overridden from Device Tree in the event that the device has a DT node. See: raspberrypi/linux#2175 raspberrypi/linux#2263 Signed-off-by: Phil Elwell <[email protected]>
jai-raptee
pushed a commit
to jai-raptee/iliteck1
that referenced
this issue
Apr 30, 2024
The MCP2515 datasheet clearly describes a level-triggered interrupt pin. Therefore the receiving interrupt controller must also be configured for level-triggered operation otherwise there is a danger of a missed interrupt condition blocking all subsequent interrupts. The ONESHOT flag ensures that the interrupt is masked until the threaded interrupt handler exits. Rather than change the flags globally (they must have worked for at least one user), allow the flags to be overridden from Device Tree in the event that the device has a DT node. See: raspberrypi/linux#2175 raspberrypi/linux#2263 Signed-off-by: Phil Elwell <[email protected]>
jai-raptee
pushed a commit
to jai-raptee/iliteck1
that referenced
this issue
Apr 30, 2024
The MCP2515 datasheet clearly describes a level-triggered interrupt pin. Therefore the receiving interrupt controller must also be configured for level-triggered operation otherwise there is a danger of a missed interrupt condition blocking all subsequent interrupts. The ONESHOT flag ensures that the interrupt is masked until the threaded interrupt handler exits. Rather than change the flags globally (they must have worked for at least one user), allow the flags to be overridden from Device Tree in the event that the device has a DT node. See: raspberrypi/linux#2175 raspberrypi/linux#2263 Signed-off-by: Phil Elwell <[email protected]>
jai-raptee
pushed a commit
to jai-raptee/iliteck1
that referenced
this issue
Apr 30, 2024
The MCP2515 datasheet clearly describes a level-triggered interrupt pin. Therefore the receiving interrupt controller must also be configured for level-triggered operation otherwise there is a danger of a missed interrupt condition blocking all subsequent interrupts. The ONESHOT flag ensures that the interrupt is masked until the threaded interrupt handler exits. Rather than change the flags globally (they must have worked for at least one user), allow the flags to be overridden from Device Tree in the event that the device has a DT node. See: raspberrypi/linux#2175 raspberrypi/linux#2263 Signed-off-by: Phil Elwell <[email protected]>
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Hi!
Strange observation while writing a new driver:
When using the flags: IRQF_ONESHOT | IRQF_TRIGGER_LOW
with request_threaded_irq I see that after I unload and reload
the module that the spi->irq value is 0.
When instrumenting my code dumping spi->irq in the remove and probe code, then I get the following messages in demsg:
Only solution is rebooting the rpi - then it works
This does not happen when using IRQF_ONESHOT | IRQF_TRIGGER_FALLING.
I can go thru the rmmod, insmod sequence 100 times without requiring a reboot.
Any Ideas why this could be and how to solve it?
Not using TRIGGER_LOW gives me a race-condition in my interrupt handler...
Any ideas?
Thanks, Martin
P.s: I am using is: 4.9.57 - commit: 2dddb04. I have not tried using the upstream kernel yet...
Sidenote: I use the default devicetree for the CM1 (bcm2708-rpi-cm.dtb) with a simple dt-overlay based on mcp2515-can0.
The text was updated successfully, but these errors were encountered: