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Groups > linux.kernel > #1605155 > unrolled thread
| Started by | Rob Herring <robh@kernel.org> |
|---|---|
| First post | 2017-03-20 22:50 +0100 |
| Last post | 2017-03-22 15:40 +0100 |
| Articles | 2 — 2 participants |
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Re: [PATCH v4 15/23] dt-bindings: PCI: dra7xx: Add dt bindings to enable unaligned access Rob Herring <robh@kernel.org> - 2017-03-20 22:50 +0100
Re: [PATCH v4 15/23] dt-bindings: PCI: dra7xx: Add dt bindings to enable unaligned access Kishon Vijay Abraham I <kishon@ti.com> - 2017-03-22 15:40 +0100
| From | Rob Herring <robh@kernel.org> |
|---|---|
| Date | 2017-03-20 22:50 +0100 |
| Subject | Re: [PATCH v4 15/23] dt-bindings: PCI: dra7xx: Add dt bindings to enable unaligned access |
| Message-ID | <tndlE-2eT-23@gated-at.bofh.it> |
On Mon, Mar 13, 2017 at 07:52:51PM +0530, Kishon Vijay Abraham I wrote: > Update device tree binding documentation of TI's dra7xx PCI > controller to include property for enabling unaligned mem access. > > Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com> > --- > Documentation/devicetree/bindings/pci/ti-pci.txt | 5 +++++ > 1 file changed, 5 insertions(+) > > diff --git a/Documentation/devicetree/bindings/pci/ti-pci.txt b/Documentation/devicetree/bindings/pci/ti-pci.txt > index 190828a5f32a..b69dd7dbd29e 100644 > --- a/Documentation/devicetree/bindings/pci/ti-pci.txt > +++ b/Documentation/devicetree/bindings/pci/ti-pci.txt > @@ -39,6 +39,11 @@ DEVICE MODE > - interrupts : one interrupt entries must be specified for main interrupt. > - num-ib-windows : number of inbound address translation windows > - num-ob-windows : number of outbound address translation windows > + - ti,syscon-unaligned-access: phandle to the syscon dt node. The 1st argument > + should contain the register offset within syscon > + and the 2nd argument should contain the bit field > + for setting the bit to enable unaligned > + access. This should be setup by the firmware/bootloader or some platform code. Why does the PCI host need to configure this? Rob
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| From | Kishon Vijay Abraham I <kishon@ti.com> |
|---|---|
| Date | 2017-03-22 15:40 +0100 |
| Message-ID | <tnPAB-3OD-1@gated-at.bofh.it> |
| In reply to | #1605155 |
Hi Rob, On Tuesday 21 March 2017 03:13 AM, Rob Herring wrote: > On Mon, Mar 13, 2017 at 07:52:51PM +0530, Kishon Vijay Abraham I wrote: >> Update device tree binding documentation of TI's dra7xx PCI >> controller to include property for enabling unaligned mem access. >> >> Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com> >> --- >> Documentation/devicetree/bindings/pci/ti-pci.txt | 5 +++++ >> 1 file changed, 5 insertions(+) >> >> diff --git a/Documentation/devicetree/bindings/pci/ti-pci.txt b/Documentation/devicetree/bindings/pci/ti-pci.txt >> index 190828a5f32a..b69dd7dbd29e 100644 >> --- a/Documentation/devicetree/bindings/pci/ti-pci.txt >> +++ b/Documentation/devicetree/bindings/pci/ti-pci.txt >> @@ -39,6 +39,11 @@ DEVICE MODE >> - interrupts : one interrupt entries must be specified for main interrupt. >> - num-ib-windows : number of inbound address translation windows >> - num-ob-windows : number of outbound address translation windows >> + - ti,syscon-unaligned-access: phandle to the syscon dt node. The 1st argument >> + should contain the register offset within syscon >> + and the 2nd argument should contain the bit field >> + for setting the bit to enable unaligned >> + access. > > This should be setup by the firmware/bootloader or some platform code. > Why does the PCI host need to configure this? That would create a dependency between the bootloader and kernel which is usually avoided in platforms like dra7xx. Thanks Kishon
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