External Interrupt
Hi,
I used the linux kernel 2.6.10 with a processor MPC8548E. I wrote a driver for a device connected with the local bus. This device has an external interrupt. In the local bus driver I have used the macro MPC85xx_IRQ_EXT<X> to get the interrupt number and pass it to the driver and after that register the ISR. Now with a kernel 2.6.21 this macro isn't available because in the header file irq.h there is the option CONFIG_PPC_MERGE that disable those options. I think this problem is related to the migration of ppc code towards powerpc. I know that now there is the new device tree source file where I can add a device and its interrupt number but I think in this file I should describe only the platform device, and this device is not a platform device. Then, how can I get now this value? Is there some function to call? How can I perform this operation?
Thanks in advance.
Marco
Quoted 14 lines · Marco Stornelli
Hi,
I used the linux kernel 2.6.10 with a processor MPC8548E. I wrote a driver for a device connected with the local bus. This device has an external interrupt. In the local bus driver I have used the macro MPC85xx_IRQ_EXT<X> to get the interrupt number and pass it to the driver and after that register the ISR. Now with a kernel 2.6.21 this macro isn't available because in the header file
irq.hthere is the optionCONFIG_PPC_MERGEthat disable those options. I think this problem is related to the migration of ppc code towards powerpc. I know that now there is the new device tree source file where I can add a device and its interrupt number but I think in this file I should describe only the platform device, and this device is not a platform device.
How comes that it's not platform device if it hangs off the local bus?
Quoted 2 lines
Then, how can I get now this value? Is there some function to call? How can I perform this operation?
Probably irq_alloc_virt()...
Sergei Shtylyov ha scritto:
Quoted 16 lines
Quoted 14 lines · Marco Stornelli
Hi,
I used the linux kernel 2.6.10 with a processor MPC8548E. I wrote a driver for a device connected with the local bus. This device has an external interrupt. In the local bus driver I have used the macro MPC85xx_IRQ_EXT<X> to get the interrupt number and pass it to the driver and after that register the ISR. Now with a kernel 2.6.21 this macro isn't available because in the header file
irq.hthere is the optionCONFIG_PPC_MERGEthat disable those options. I think this problem is related to the migration of ppc code towards powerpc. I know that now there is the new device tree source file where I can add a device and its interrupt number but I think in this file I should describe only the platform device, and this device is not a platform device.
Quoted 1 line
How comes that it's not platform device if it hangs off the local bus?
In SoC system generally the platform device are (more or less) the microprocessor controller like i2c, pci, local bus itself and so on. I think is like if you consider a PCI board a platform device only because it hangs off the PCI link.
Quoted 6 lines
Quoted 3 lines
Then, how can I get now this value? Is there some function to call? How can I perform this operation?
Probably
irq_alloc_virt()...
Quoted 13 lines · Marco Stornelli
Quoted 12 lines
Quoted 12 lines
I used the linux kernel 2.6.10 with a processor MPC8548E. I wrote a driver for a device connected with the local bus. This device has an external interrupt. In the local bus driver I have used the macro MPC85xx_IRQ_EXT<X> to get the interrupt number and pass it to the driver and after that register the ISR. Now with a kernel 2.6.21 this macro isn't available because in the header file
irq.hthere is the optionCONFIG_PPC_MERGEthat disable those options. I think this problem is related to the migration of ppc code towards powerpc. I know that now there is the new device tree source file where I can add a device and its interrupt number but I think in this file I should describe only the platform device, and this device is not a platform device.
Quoted 4 lines
Quoted 1 line
How comes that it's not platform device if it hangs off the local bus?
In SoC system generally the platform device are (more or less) the microprocessor controller like i2c, pci, local bus itself and so on.
That's SoC devices but the notion of the platform device is not limited to
SoC device only, rather to all the on-board devices.
Quoted 2 lines
I think is like if you consider a PCI board a platform device only because it hangs off the PCI link.
No. PCI devices are detectable/configurable by kernel -- even if they are
on-board chips, they can be found by PCI bus scan (and finally presented as the device nodes as well), while local bus devices (most probably) not. An example (that comes to mind) of a device hanging off the local bus and yet described by the device tree are the flash chips.
WBR, Sergei
Sergei Shtylyov ha scritto:
Quoted 23 lines
Quoted 13 lines · Marco Stornelli
Quoted 12 lines
Quoted 12 lines
I used the linux kernel 2.6.10 with a processor MPC8548E. I wrote a driver for a device connected with the local bus. This device has an external interrupt. In the local bus driver I have used the macro MPC85xx_IRQ_EXT<X> to get the interrupt number and pass it to the driver and after that register the ISR. Now with a kernel 2.6.21 this macro isn't available because in the header file
irq.hthere is the optionCONFIG_PPC_MERGEthat disable those options. I think this problem is related to the migration of ppc code towards powerpc. I know that now there is the new device tree source file where I can add a device and its interrupt number but I think in this file I should describe only the platform device, and this device is not a platform device.Quoted 4 lines
Quoted 1 line
How comes that it's not platform device if it hangs off the local bus?
In SoC system generally the platform device are (more or less) the microprocessor controller like i2c, pci, local bus itself and so on.
That's SoC devices but the notion of the platform device is not limited to
SoC device only, rather to all the on-board devices.
Quoted 8 lines
Quoted 2 lines
I think is like if you consider a PCI board a platform device only because it hangs off the PCI link.
No. PCI devices are detectable/configurable by kernel -- even if they are
on-board chips, they can be found by PCI bus scan (and finally presented as the device nodes as well), while local bus devices (most probably) not. An example (that comes to mind) of a device hanging off the local bus and yet described by the device tree are the flash chips.
Yes you are right. The local bus is like i2c, but I've never seen a device connected with i2c and described with a sub-node of i2c node in the dts file, however I think it's only philosophy, the most important thing is that there is a way to get the irq number :)
Thanks for your response.
Regards.
Marco
Quoted 8 lines
WBR, Sergei
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Quoted 3 lines · Marco Stornelli
Yes you are right. The local bus is like i2c, but I've never seen a device connected with i2c and described with a sub-node of i2c node in the dts file,
Grep the dts directory for "rtc@68".
-Scott
Quoted 6 lines · Scott Wood
Quoted 3 lines · Marco Stornelli
Yes you are right. The local bus is like i2c, but I've never seen a device connected with i2c and described with a sub-node of i2c node in the dts file,
Grep the dts directory for "rtc@68".
But be sure to inspect /dts-v1/-ness too.
Yes, yes, yes. I have a typo fix coming... :-)
jdl
Hello.
Quoted 4 lines · Marco Stornelli
I used the linux kernel 2.6.10 with a processor MPC8548E. I wrote a driver for a device connected with the local bus. This device has an external interrupt. In the local bus driver I have used the macro MPC85xx_IRQ_EXT<X> to get the interrupt number and pass it to the
Quoted 8 lines
driver and after that register the ISR. Now with a kernel 2.6.21 this macro isn't available because in the header file
irq.hthere is the optionCONFIG_PPC_MERGEthat disable those options. I think this problem is related to the migration of ppc code towards powerpc. I know that now there is the new device tree source file where I can add a device and its interrupt number but I think in this file I should describe only the platform device, and this device is not a platform device.
How comes that it's not platform device if it hangs off the local bus?
Quoted 2 lines
Then, how can I get now this value? Is there some function to call? How can I perform this operation?
Probably irq_alloc_virt()...
WBR, Sergei
Marco,
ASFAIK there where some changes and you have to get the irq with = irq_create_mapping() or irq_of_parse_and_map()
Kindly regards
Hans
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Hans Lehmann
Dipl.-Ing. Elektrotechnik
RITTER Elektronik GmbH
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-----Urspr=FCngliche Nachricht-----
Von: = linuxppc-embedded-bounces+hans.lehmann=3Dritter-elektronik.de@ozlabs.org = [mailto:linuxppc-embedded-bounces+hans.lehmann=3Dritter-elektronik.de@ozl= abs.org] Im Auftrag von Marco Stornelli
Gesendet: Freitag, 1. Februar 2008 09:11
An: Linuxppc Embedded Mailing List
Betreff: External Interrupt
Hi,
I used the linux kernel 2.6.10 with a processor MPC8548E. I wrote a = driver for a device connected with the local bus. This device has an = external interrupt. In the local bus driver I have used the macro = MPC85xx_IRQ_EXT<X> to get the interrupt number and pass it to the driver = and after that register the ISR. Now with a kernel 2.6.21 this macro = isn't available because in the header file irq.h there is the option = CONFIG_PPC_MERGE that disable those options. I think this problem is = related to the migration of ppc code towards powerpc. I know that now = there is the new device tree source file where I can add a device and = its interrupt number but I think in this file I should describe only = the platform device, and this device is not a platform device. Then, how = can I get now this value? Is there some function to call? How can I = perform this operation?
Thanks in advance.
Marco
_______________________________________________
Linuxppc-embedded mailing list
[email protected]
https://ozlabs.org/mailman/listinfo/linuxppc-embedded