linux-kernel - [PATCH v3 2/5] dt-bindings: media: IMX8MQ VPU: document reset usage

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Date:   Mon,  1 Mar 2021 16:17:51 +0100
From:   Benjamin Gaignard <benjamin.gaignard@...labora.com>
To:     p.zabel@...gutronix.de, robh+dt@...nel.org, shawnguo@...nel.org,
        s.hauer@...gutronix.de, festevam@...il.com, ezequiel@...labora.com,
        mchehab@...nel.org, gregkh@...uxfoundation.org
Cc:     kernel@...gutronix.de, linux-imx@....com,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, linux-media@...r.kernel.org,
        linux-rockchip@...ts.infradead.org, devel@...verdev.osuosl.org,
        kernel@...labora.com, benjamin.gaignard@...labora.com
Subject: [PATCH v3 2/5] dt-bindings: media: IMX8MQ VPU: document reset usage

Document IMX8MQ VPU bindings to add the phandle to the reset driver.

Provide an independent reset driver allow to the both VPUs to share
their control/reset hardware block. The reset driver replace what
was previously done be using the 'ctrl' registers inside the driver.

This breaks the compatibility between DTB and kernel but the driver
is still in staging directory and limited to IMX8MQ SoC.

Signed-off-by: Benjamin Gaignard <benjamin.gaignard@...labora.com>
---
version 3:
- Fix error in VPU example node

 .../devicetree/bindings/media/nxp,imx8mq-vpu.yaml  | 14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)

diff --git a/Documentation/devicetree/bindings/media/nxp,imx8mq-vpu.yaml b/Documentation/devicetree/bindings/media/nxp,imx8mq-vpu.yaml
index 762be3f96ce9..fd53a4e43572 100644
--- a/Documentation/devicetree/bindings/media/nxp,imx8mq-vpu.yaml
+++ b/Documentation/devicetree/bindings/media/nxp,imx8mq-vpu.yaml
@@ -18,13 +18,12 @@ properties:
     const: nxp,imx8mq-vpu
 
   reg:
-    maxItems: 3
+    maxItems: 2
 
   reg-names:
     items:
       - const: g1
       - const: g2
-      - const: ctrl
 
   interrupts:
     maxItems: 2
@@ -46,6 +45,9 @@ properties:
   power-domains:
     maxItems: 1
 
+  resets:
+    maxItems: 1
+
 required:
   - compatible
   - reg
@@ -54,6 +56,7 @@ required:
   - interrupt-names
   - clocks
   - clock-names
+  - resets
 
 additionalProperties: false
 
@@ -61,13 +64,13 @@ examples:
   - |
         #include <dt-bindings/clock/imx8mq-clock.h>
         #include <dt-bindings/interrupt-controller/arm-gic.h>
+        #include <dt-bindings/reset/imx8mq-vpu-reset.h>
 
         vpu: video-codec@...00000 {
                 compatible = "nxp,imx8mq-vpu";
                 reg = <0x38300000 0x10000>,
-                      <0x38310000 0x10000>,
-                      <0x38320000 0x10000>;
-                reg-names = "g1", "g2", "ctrl";
+                      <0x38310000 0x10000>;
+                reg-names = "g1", "g2";
                 interrupts = <GIC_SPI 7 IRQ_TYPE_LEVEL_HIGH>,
                              <GIC_SPI 8 IRQ_TYPE_LEVEL_HIGH>;
                 interrupt-names = "g1", "g2";
@@ -76,4 +79,5 @@ examples:
                          <&clk IMX8MQ_CLK_VPU_DEC_ROOT>;
                 clock-names = "g1", "g2", "bus";
                 power-domains = <&pgc_vpu>;
+                resets = <&vpu_reset IMX8MQ_RESET_VPU_RESET_G1>;
         };
-- 
2.25.1