On 19/02/18 05:10, Rob Herring wrote:
On Tue, Feb 13, 2018 at 07:15:29PM +0200, Tero Kristo wrote:
Certain revisions of the TI EMIF IP contain ECC support in them. Reflect
this in the DT binding. Also, add interrupts property as a required
property for the emif controller, as all revisions of the emif IP contain
interrupt support; this might remain unused by the kernel driver though.
Signed-off-by: Tero Kristo <t-kristo@xxxxxx>
---
.../devicetree/bindings/memory-controllers/ti/emif.txt | 13 ++++++++++++-
1 file changed, 12 insertions(+), 1 deletion(-)
diff --git a/Documentation/devicetree/bindings/memory-controllers/ti/emif.txt b/Documentation/devicetree/bindings/memory-controllers/ti/emif.txt
index 621b41c..87022a9 100644
--- a/Documentation/devicetree/bindings/memory-controllers/ti/emif.txt
+++ b/Documentation/devicetree/bindings/memory-controllers/ti/emif.txt
@@ -3,7 +3,9 @@
EMIF - External Memory Interface - is an SDRAM controller used in
TI SoCs. EMIF supports, based on the IP revision, one or more of
DDR2/DDR3/LPDDR2 protocols. This binding describes a given instance
-of the EMIF IP and memory parts attached to it.
+of the EMIF IP and memory parts attached to it. Certain revisions
+of the EMIF controller also contain optional ECC support, which
+corrects one bit errors and detects two bit errors.
Required properties:
- compatible : Should be of the form "ti,emif-<ip-rev>" where <ip-rev>
@@ -11,6 +13,8 @@ Required properties:
compatible should be one of the following:
"ti,emif-am3352"
"ti,emif-am4372"
+ "ti,emif-dra7xx"
+ "ti,emif-keystone"
- phy-type : <u32> indicating the DDR phy type. Following are the
allowed values
@@ -22,6 +26,7 @@ Required properties:
- ti,hwmods : For TI hwmods processing and omap device creation
the value shall be "emif<n>" where <n> is the number of the EMIF
instance with base 1.
+- interrupts : interrupt used by the controller
Only for the new compatibles?
I added this as required property for all, as all EMIF versions actually
do have IRQ. Should this still be marked as optional as only certain
versions of the driver use it? On am3/am4 only it is optional right now,
and not used by the existing driver. On omap4 and omap5 it is required
also (list of compatibles for the binding seem to be missing these
actually; ti,emif-4d and ti,emif-4d5.)
Either way, I can mark this as optional property for am3/am4 if you want
(I actually asked this already before but did not get clear response),
what is your final take on this?
-Tero
Required only for "ti,emif-am3352" and "ti,emif-am4372":
- sram : Phandles for generic sram driver nodes,
@@ -71,3 +76,9 @@ emif: emif@4c000000 {
sram = <&pm_sram_code
&pm_sram_data>;
};
+
+emif1: emif@4c000000 {
+ compatible = "ti,emif-dra7xx";
+ reg = <0x4c000000 0x200>;
+ interrupts = <GIC_SPI 105 IRQ_TYPE_LEVEL_HIGH>;
+};
--
1.9.1
--
--
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