diff mbox

[v3,2/3] dt-bindings: arm: omap: dmm: Document new compatible for DRA7xx family

Message ID 20180410113301.18984-3-peter.ujfalusi@ti.com (mailing list archive)
State New, archived
Headers show

Commit Message

Peter Ujfalusi April 10, 2018, 11:33 a.m. UTC
From: Tomi Valkeinen <tomi.valkeinen@ti.com>

Define unique compatible string for the DMM in DRA7xx family.

The new compatible can be used to apply DRA7xx specific workarounds for
ERRATAs, like i878 (MPU Lockup with concurrent DMM and EMIF accesses)

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
---
 Documentation/devicetree/bindings/arm/omap/dmm.txt | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

Comments

Tomi Valkeinen May 23, 2018, 9:56 a.m. UTC | #1
On 10/04/18 14:33, Peter Ujfalusi wrote:
> From: Tomi Valkeinen <tomi.valkeinen@ti.com>
> 
> Define unique compatible string for the DMM in DRA7xx family.
> 
> The new compatible can be used to apply DRA7xx specific workarounds for
> ERRATAs, like i878 (MPU Lockup with concurrent DMM and EMIF accesses)
> 
> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
> Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
> Reviewed-by: Rob Herring <robh@kernel.org>
> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> ---
>  Documentation/devicetree/bindings/arm/omap/dmm.txt | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/Documentation/devicetree/bindings/arm/omap/dmm.txt b/Documentation/devicetree/bindings/arm/omap/dmm.txt
> index 8bd6d0a238a8..bbbe7cdba30c 100644
> --- a/Documentation/devicetree/bindings/arm/omap/dmm.txt
> +++ b/Documentation/devicetree/bindings/arm/omap/dmm.txt
> @@ -8,7 +8,8 @@ translation for initiators which need contiguous dma bus addresses.
>  
>  Required properties:
>  - compatible:	Should contain "ti,omap4-dmm" for OMAP4 family
> -		Should contain "ti,omap5-dmm" for OMAP5 and DRA7x family
> +		Should contain "ti,omap5-dmm" for OMAP5 family
> +		Should contain "ti,dra7-dmm" for DRA7xx family
>  - reg:		Contains DMM register address range (base address and length)
>  - interrupts:	Should contain an interrupt-specifier for DMM_IRQ.
>  - ti,hwmods:	Name of the hwmod associated to DMM, which is typically "dmm"
> 

Thinking about this now, wouldn't it be better to add a DT property to
enable the work-around? Or we could use soc_device_match() to figure out
that this is a DRA7 SoC.

 Tomi
diff mbox

Patch

diff --git a/Documentation/devicetree/bindings/arm/omap/dmm.txt b/Documentation/devicetree/bindings/arm/omap/dmm.txt
index 8bd6d0a238a8..bbbe7cdba30c 100644
--- a/Documentation/devicetree/bindings/arm/omap/dmm.txt
+++ b/Documentation/devicetree/bindings/arm/omap/dmm.txt
@@ -8,7 +8,8 @@  translation for initiators which need contiguous dma bus addresses.
 
 Required properties:
 - compatible:	Should contain "ti,omap4-dmm" for OMAP4 family
-		Should contain "ti,omap5-dmm" for OMAP5 and DRA7x family
+		Should contain "ti,omap5-dmm" for OMAP5 family
+		Should contain "ti,dra7-dmm" for DRA7xx family
 - reg:		Contains DMM register address range (base address and length)
 - interrupts:	Should contain an interrupt-specifier for DMM_IRQ.
 - ti,hwmods:	Name of the hwmod associated to DMM, which is typically "dmm"