diff mbox series

[v2,2/4] dt-bindings: hwlock: qcom: Allow device on mmio bus

Message ID 20200622075956.171058-3-bjorn.andersson@linaro.org (mailing list archive)
State New, archived
Headers show
Series hwspinlock: qcom: Allow dropping the intermediate TCSR mutex syscon | expand

Commit Message

Bjorn Andersson June 22, 2020, 7:59 a.m. UTC 
In modern Qualcomm platforms the mutex region of the TCSR is forked off
into its own block, all with a offset of 0 and stride of 4096, and in
some of these platforms no other registers in this region is accessed
from Linux.

Update the binding to allow the hardware block to be described directly
on the mmio bus, in addition to allowing the existing syscon based
definition for backwards compatibility.

Reviewed-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
---

Changes since v1:
- None

 .../bindings/hwlock/qcom-hwspinlock.yaml         | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

Comments

Rob Herring July 14, 2020, 2:10 a.m. UTC | #1 
On Mon, 22 Jun 2020 00:59:54 -0700, Bjorn Andersson wrote:
> In modern Qualcomm platforms the mutex region of the TCSR is forked off
> into its own block, all with a offset of 0 and stride of 4096, and in
> some of these platforms no other registers in this region is accessed
> from Linux.
> 
> Update the binding to allow the hardware block to be described directly
> on the mmio bus, in addition to allowing the existing syscon based
> definition for backwards compatibility.
> 
> Reviewed-by: Vinod Koul <vkoul@kernel.org>
> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
> ---
> 
> Changes since v1:
> - None
> 
>  .../bindings/hwlock/qcom-hwspinlock.yaml         | 16 +++++++++++++++-
>  1 file changed, 15 insertions(+), 1 deletion(-)
> 

Reviewed-by: Rob Herring <robh@kernel.org>
diff mbox series

Patch

diff --git a/Documentation/devicetree/bindings/hwlock/qcom-hwspinlock.yaml b/Documentation/devicetree/bindings/hwlock/qcom-hwspinlock.yaml
index 71e63b52edd5..88f975837588 100644
--- a/Documentation/devicetree/bindings/hwlock/qcom-hwspinlock.yaml
+++ b/Documentation/devicetree/bindings/hwlock/qcom-hwspinlock.yaml
@@ -19,6 +19,9 @@  properties:
       - qcom,sfpb-mutex
       - qcom,tcsr-mutex
 
+  reg:
+    maxItems: 1
+
   '#hwlock-cells':
     const: 1
 
@@ -31,7 +34,12 @@  properties:
 required:
   - compatible
   - '#hwlock-cells'
-  - syscon
+
+oneOf:
+  - required:
+    - reg
+  - required:
+    - syscon
 
 additionalProperties: false
 
@@ -46,6 +54,12 @@  examples:
                 compatible = "qcom,tcsr-mutex";
                 syscon = <&tcsr_mutex_block 0 0x80>;
 
+                #hwlock-cells = <1>;
+        };
+  - |
+        tcsr_mutex: hwlock@1f40000 {
+                compatible = "qcom,tcsr-mutex";
+                reg = <0x01f40000 0x40000>;
                 #hwlock-cells = <1>;
         };
 ...