diff mbox series

[v3,1/8] dt-bindings: power: Add T-HEAD TH1520 GPU power sequencer

Message ID 20250530-apr_14_for_sending-v3-1-83d5744d997c@samsung.com
State New
Headers show
Series Add TH1520 GPU support with power sequencing | expand

Commit Message

Michal Wilczynski May 29, 2025, 10:23 p.m. UTC 
Introduce device tree bindings for a new power sequencer provider
dedicated to the T-HEAD TH1520 SoC's GPU.

The thead,th1520-gpu-pwrseq compatible designates a node that will
manage the complex power-up and power-down sequence for the GPU. This
sequencer requires a handle to the GPU's clock generator reset line
(gpu-clkgen), which is specified in its device tree node.

This binding will be used by a new pwrseq driver to abstract the
SoC specific power management details from the generic GPU driver.

Signed-off-by: Michal Wilczynski <m.wilczynski@samsung.com>
---
 .../bindings/power/thead,th1520-pwrseq.yaml        | 42 ++++++++++++++++++++++
 MAINTAINERS                                        |  1 +
 2 files changed, 43 insertions(+)
diff mbox series

Patch

diff --git a/Documentation/devicetree/bindings/power/thead,th1520-pwrseq.yaml b/Documentation/devicetree/bindings/power/thead,th1520-pwrseq.yaml
new file mode 100644
index 0000000000000000000000000000000000000000..4c302abfb76fb9e243946f4eefa333c6b02e59d3
--- /dev/null
+++ b/Documentation/devicetree/bindings/power/thead,th1520-pwrseq.yaml
@@ -0,0 +1,42 @@ 
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/power/thead,th1520-pwrseq.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: T-HEAD TH1520 GPU Power Sequencer
+
+maintainers:
+  - Michal Wilczynski <m.wilczynski@samsung.com>
+
+description: |
+  This binding describes the power sequencer for the T-HEAD TH1520 GPU.
+  This sequencer handles the specific power-up and power-down sequences
+  required by the GPU, including managing clocks and resets from both the
+  sequencer and the GPU device itself.
+
+properties:
+  compatible:
+    const: thead,th1520-gpu-pwrseq
+
+  resets:
+    description: A phandle to the GPU clock generator reset.
+    maxItems: 1
+
+  reset-names:
+    const: gpu-clkgen
+
+required:
+  - compatible
+  - resets
+  - reset-names
+
+additionalProperties: false
+
+examples:
+  - |
+    gpu_pwrseq: pwrseq {
+        compatible = "thead,th1520-gpu-pwrseq";
+        resets = <&rst 0>;
+        reset-names = "gpu-clkgen";
+    };
diff --git a/MAINTAINERS b/MAINTAINERS
index 0d59a5910e632350a4d72a761c6c5ce1d3a1bc34..78e3067df1152929de638244b03264733d08556e 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -21355,6 +21355,7 @@  F:	Documentation/devicetree/bindings/firmware/thead,th1520-aon.yaml
 F:	Documentation/devicetree/bindings/mailbox/thead,th1520-mbox.yaml
 F:	Documentation/devicetree/bindings/net/thead,th1520-gmac.yaml
 F:	Documentation/devicetree/bindings/pinctrl/thead,th1520-pinctrl.yaml
+F:	Documentation/devicetree/bindings/power/thead,th1520-pwrseq.yaml
 F:	Documentation/devicetree/bindings/reset/thead,th1520-reset.yaml
 F:	arch/riscv/boot/dts/thead/
 F:	drivers/clk/thead/clk-th1520-ap.c