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Groups > linux.kernel > #1299676
| From | Arnd Bergmann <arnd@arndb.de> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [PATCH v1 3/3] ARM64 LPC: update binding doc |
| Date | 2015-12-31 15:50 +0100 |
| Message-ID | <qLMIa-5EF-9@gated-at.bofh.it> (permalink) |
| References | <qL2Fk-17h-3@gated-at.bofh.it> <qLkVA-4DJ-5@gated-at.bofh.it> <qLMf7-5tU-1@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On Thursday 31 December 2015 22:12:19 Rongrong Zou wrote:
> 在 2015/12/30 17:06, Arnd Bergmann 写道:
> > On Tuesday 29 December 2015 21:33:52 Rongrong Zou wrote:
> >> +Example:
> >> +
> >> + lpc_0: lpc@a01b0000 {
> >> + #address-cells = <1>;
> >> + #size-cells = <1>;
> >> + compatible = "low-pin-count";
> >> + reg = <0x0 0xa01b0000 0x0 0x10000>;
> >> + };
> >
> > One more thought: please try to stick as closely as possible to the existing
> > ISA binding that is documented at
> >
> > http://www.firmware.org/1275/bindings/isa/isa0_4d.ps
> From the specification, I think I should use 2 32bit integer to describe the isa addr in dts.
> >
> > In particular, this should cover the possibility of describing both memory
> > and I/O spaces in child devices.
> >
>
> I found below config in powerpc dts "arch/powerpc/boot/dts/mpc8544ds.dts"
>
> isa@1e {
> device_type = "isa";
> #interrupt-cells = <2>;
> #size-cells = <1>;
> #address-cells = <2>;
> reg = <0xf000 0x0 0x0 0x0 0x0>;
> ranges = <0x1 0x0 0x1000000 0x0 0x0
> 0x1000>;
> interrupt-parent = <&i8259>;
>
>
>
> rtc@70 {
> compatible = "pnpPNP,b00";
> reg = <0x1 0x70 0x2>;
> };
> the isa space in child-node: reg = <0x1 0x70 0x2>;
> 0x1 means IO space, 70 means addr, 0x2 is size.
> but when i config the following in dts, the ipmi_0 node can't be probed,
> I think there may be some problems.
>
> lpc_0: lpc@a01b0000 {
> compatible = "low-pin-count";
> device_type = "isa";
> #address-cells = <2>;
> #size-cells = <1>;
> reg = <0x0 0xa01b0000 0x0 0x10000>;
>
> ipmi_0:ipmi@000000e4{
> device_type = "ipmi";
> compatible = "ipmi-bt";
> reg = <0x1 0x000000e4 0x4>;
> };
The DT sample above looks good in principle. I believe what you are missing
here is code in your driver to scan the child nodes to create the platform
devices. of_bus_isa_translate() should work with your definition here
and create the correct IORESOURCE_IO resources. You don't have any MMIO
resources, so the absence of a ranges property is ok. Maybe all you
are missing is a call to of_platform_populate() or of_platform_bus_probe()?
Arnd
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[PATCH v1 0/3] ARM64 LPC: legacy ISA I/O support Rongrong Zou <zourongrong@gmail.com> - 2015-12-29 14:40 +0100
[PATCH v1 2/3] ARM64 LPC: LPC driver implementation Rongrong Zou <zourongrong@gmail.com> - 2015-12-29 14:40 +0100
Re: [PATCH v1 2/3] ARM64 LPC: LPC driver implementation Arnd Bergmann <arnd@arndb.de> - 2015-12-29 15:00 +0100
Re: [PATCH v1 2/3] ARM64 LPC: LPC driver implementation Rongrong Zou <zourongrong@huawei.com> - 2015-12-29 15:10 +0100
Re: [PATCH v1 2/3] ARM64 LPC: LPC driver implementation Arnd Bergmann <arnd@arndb.de> - 2015-12-29 15:20 +0100
[PATCH v1 1/3] ARM64 LPC: indirect ISA PORT IO introduced Rongrong Zou <zourongrong@gmail.com> - 2015-12-29 14:40 +0100
Re: [PATCH v1 1/3] ARM64 LPC: indirect ISA PORT IO introduced Arnd Bergmann <arnd@arndb.de> - 2015-12-29 14:50 +0100
Re: [PATCH v1 1/3] ARM64 LPC: indirect ISA PORT IO introduced Rongrong Zou <zourongrong@huawei.com> - 2015-12-29 15:30 +0100
Re: [PATCH v1 1/3] ARM64 LPC: indirect ISA PORT IO introduced Arnd Bergmann <arnd@arndb.de> - 2015-12-29 15:40 +0100
Re: [PATCH v1 1/3] ARM64 LPC: indirect ISA PORT IO introduced Rongrong Zou <zourongrong@huawei.com> - 2015-12-30 02:40 +0100
Re: [PATCH v1 1/3] ARM64 LPC: indirect ISA PORT IO introduced Arnd Bergmann <arnd@arndb.de> - 2015-12-30 10:00 +0100
Re: [PATCH v1 1/3] ARM64 LPC: indirect ISA PORT IO introduced Rongrong Zou <zourongrong@huawei.com> - 2015-12-30 10:40 +0100
Re: [PATCH v1 1/3] ARM64 LPC: indirect ISA PORT IO introduced Arnd Bergmann <arnd@arndb.de> - 2015-12-30 10:50 +0100
Re: [PATCH v1 1/3] ARM64 LPC: indirect ISA PORT IO introduced Will Deacon <will.deacon@arm.com> - 2016-01-04 11:20 +0100
Re: [PATCH v1 1/3] ARM64 LPC: indirect ISA PORT IO introduced Rongrong Zou <zourongrong@huawei.com> - 2016-01-04 11:30 +0100
[PATCH v1 3/3] ARM64 LPC: update binding doc Rongrong Zou <zourongrong@gmail.com> - 2015-12-29 14:40 +0100
Re: [PATCH v1 3/3] ARM64 LPC: update binding doc Arnd Bergmann <arnd@arndb.de> - 2015-12-29 15:00 +0100
Re: [PATCH v1 3/3] ARM64 LPC: update binding doc Arnd Bergmann <arnd@arndb.de> - 2015-12-30 10:10 +0100
Re: [PATCH v1 3/3] ARM64 LPC: update binding doc Rongrong Zou <zourongrong@huawei.com> - 2015-12-31 15:20 +0100
Re: [PATCH v1 3/3] ARM64 LPC: update binding doc Arnd Bergmann <arnd@arndb.de> - 2015-12-31 15:50 +0100
Re: [PATCH v1 3/3] ARM64 LPC: update binding doc Rongrong Zou <zourongrong@huawei.com> - 2016-01-03 13:30 +0100
Re: [PATCH v1 3/3] ARM64 LPC: update binding doc Arnd Bergmann <arnd@arndb.de> - 2016-01-04 12:20 +0100
Re: [PATCH v1 3/3] ARM64 LPC: update binding doc Rongrong Zou <zourongrong@gmail.com> - 2016-01-04 17:00 +0100
Re: [PATCH v1 3/3] ARM64 LPC: update binding doc Arnd Bergmann <arnd@arndb.de> - 2016-01-04 17:40 +0100
Re: [PATCH v1 3/3] ARM64 LPC: update binding doc Rongrong Zou <zourongrong@huawei.com> - 2016-01-05 13:10 +0100
Re: [PATCH v1 3/3] ARM64 LPC: update binding doc Arnd Bergmann <arnd@arndb.de> - 2016-01-05 13:30 +0100
Re: [PATCH v1 3/3] ARM64 LPC: update binding doc Rongrong Zou <zourongrong@huawei.com> - 2016-01-06 14:40 +0100
Re: [PATCH v1 3/3] ARM64 LPC: update binding doc Rongrong Zou <zourongrong@huawei.com> - 2016-01-07 04:40 +0100
Re: [PATCH v1 3/3] ARM64 LPC: update binding doc Rolland Chau <zourongrong@gmail.com> - 2016-01-10 10:40 +0100
Re: [PATCH v1 3/3] ARM64 LPC: update binding doc Rongrong Zou <zourongrong@gmail.com> - 2016-01-10 14:40 +0100
Re: [PATCH v1 3/3] ARM64 LPC: update binding doc liviu.dudau@arm.com - 2016-01-11 17:20 +0100
Re: [PATCH v1 3/3] ARM64 LPC: update binding doc Rongrong Zou <zourongrong@gmail.com> - 2016-01-12 03:40 +0100
Re: [PATCH v1 3/3] ARM64 LPC: update binding doc liviu.dudau@arm.com - 2016-01-12 10:10 +0100
Re: [PATCH v1 3/3] ARM64 LPC: update binding doc Rongrong Zou <zourongrong@huawei.com> - 2016-01-12 10:30 +0100
Re: [PATCH v1 3/3] ARM64 LPC: update binding doc liviu.dudau@arm.com - 2016-01-12 11:20 +0100
Re: [PATCH v1 3/3] ARM64 LPC: update binding doc Rongrong Zou <zourongrong@huawei.com> - 2016-01-12 12:10 +0100
Re: [PATCH v1 3/3] ARM64 LPC: update binding doc liviu.dudau@arm.com - 2016-01-12 12:30 +0100
Re: [PATCH v1 3/3] ARM64 LPC: update binding doc Rongrong Zou <zourongrong@huawei.com> - 2016-01-12 13:00 +0100
Re: [PATCH v1 3/3] ARM64 LPC: update binding doc liviu.dudau@arm.com - 2016-01-12 16:20 +0100
Re: [PATCH v1 3/3] ARM64 LPC: update binding doc Arnd Bergmann <arnd@arndb.de> - 2016-01-13 00:00 +0100
Re: [PATCH v1 3/3] ARM64 LPC: update binding doc Benjamin Herrenschmidt <benh@kernel.crashing.org> - 2016-01-13 07:20 +0100
Re: [PATCH v1 3/3] ARM64 LPC: update binding doc Rongrong Zou <zourongrong@gmail.com> - 2016-01-13 07:40 +0100
Re: [PATCH v1 3/3] ARM64 LPC: update binding doc Arnd Bergmann <arnd@arndb.de> - 2016-01-13 10:30 +0100
Re: [PATCH v1 3/3] ARM64 LPC: update binding doc Arnd Bergmann <arnd@arndb.de> - 2016-01-13 11:20 +0100
Re: [PATCH v1 3/3] ARM64 LPC: update binding doc liviu.dudau@arm.com - 2016-01-13 11:40 +0100
Re: [PATCH v1 3/3] ARM64 LPC: update binding doc liviu.dudau@arm.com - 2016-01-13 11:20 +0100
Re: [PATCH v1 3/3] ARM64 LPC: update binding doc Arnd Bergmann <arnd@arndb.de> - 2016-01-13 00:00 +0100
Re: [PATCH v1 3/3] ARM64 LPC: update binding doc liviu.dudau@arm.com - 2016-01-13 11:10 +0100
Re: [PATCH v1 3/3] ARM64 LPC: update binding doc Arnd Bergmann <arnd@arndb.de> - 2016-01-13 11:40 +0100
Re: [PATCH v1 3/3] ARM64 LPC: update binding doc Rongrong Zou <zourongrong@gmail.com> - 2016-01-13 12:10 +0100
Re: [PATCH v1 3/3] ARM64 LPC: update binding doc liviu.dudau@arm.com - 2016-01-13 12:30 +0100
Re: [PATCH v1 3/3] ARM64 LPC: update binding doc Benjamin Herrenschmidt <benh@kernel.crashing.org> - 2016-01-14 01:20 +0100
Re: [PATCH v1 3/3] ARM64 LPC: update binding doc Rongrong Zou <zourongrong@gmail.com> - 2016-01-14 03:10 +0100
Re: [PATCH v1 3/3] ARM64 LPC: update binding doc Benjamin Herrenschmidt <benh@kernel.crashing.org> - 2016-01-14 04:50 +0100
Re: [PATCH v1 3/3] ARM64 LPC: update binding doc Rongrong Zou <zourongrong@gmail.com> - 2016-01-14 05:50 +0100
Re: [PATCH v1 3/3] ARM64 LPC: update binding doc Benjamin Herrenschmidt <benh@kernel.crashing.org> - 2016-01-14 12:30 +0100
Re: [PATCH v1 3/3] ARM64 LPC: update binding doc Rongrong Zou <zourongrong@gmail.com> - 2016-01-14 14:20 +0100
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