linux-kernel - [PATCH 1/3] dt-bindings: firmware: google,gs101-acpm-ipc: add clocks node

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Message-Id: <20250819-acpm-clk-v1-1-6bbd97474671@linaro.org>
Date: Tue, 19 Aug 2025 11:45:36 +0000
From: Tudor Ambarus <tudor.ambarus@...aro.org>
To: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, 
 Peter Griffin <peter.griffin@...aro.org>, 
 André Draszik <andre.draszik@...aro.org>, 
 Michael Turquette <mturquette@...libre.com>, 
 Stephen Boyd <sboyd@...nel.org>, Krzysztof Kozlowski <krzk@...nel.org>, 
 Alim Akhtar <alim.akhtar@...sung.com>, 
 Sylwester Nawrocki <s.nawrocki@...sung.com>, 
 Chanwoo Choi <cw00.choi@...sung.com>
Cc: linux-kernel@...r.kernel.org, linux-samsung-soc@...r.kernel.org, 
 devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, 
 linux-clk@...r.kernel.org, willmcvicker@...gle.com, kernel-team@...roid.com, 
 Tudor Ambarus <tudor.ambarus@...aro.org>
Subject: [PATCH 1/3] dt-bindings: firmware: google,gs101-acpm-ipc: add
 clocks node

The firmware exposes clocks that can be controlled via the ACPM
interface. Describe the clocks exposed by the APM firmware.

Signed-off-by: Tudor Ambarus <tudor.ambarus@...aro.org>
---
 .../bindings/firmware/google,gs101-acpm-ipc.yaml   | 28 ++++++++++++++++++++++
 include/dt-bindings/clock/google,gs101.h           | 15 ++++++++++++
 2 files changed, 43 insertions(+)

diff --git a/Documentation/devicetree/bindings/firmware/google,gs101-acpm-ipc.yaml b/Documentation/devicetree/bindings/firmware/google,gs101-acpm-ipc.yaml
index 9785aac3b5f34955bbfe2718eec48581d050954f..27cdf9c881ca680e78e77a0e14ffcffeba970871 100644
--- a/Documentation/devicetree/bindings/firmware/google,gs101-acpm-ipc.yaml
+++ b/Documentation/devicetree/bindings/firmware/google,gs101-acpm-ipc.yaml
@@ -27,6 +27,29 @@ properties:
   mboxes:
     maxItems: 1
 
+  clocks:
+    description:
+      Clocks that are variable and index based. These clocks don't provide
+      an entire range of values between the limits but only discrete points
+      within the range. The firmware also manages the voltage scaling
+      appropriately with the clock scaling.
+    type: object
+    additionalProperties: false
+
+    properties:
+      compatible:
+        const: google,gs101-acpm-dvfs-clocks
+
+      "#clock-cells":
+        const: 1
+        description:
+          The argument is the ID of the clock contained by the firmware
+          messages.
+
+    required:
+      - compatible
+      - "#clock-cells"
+
   pmic:
     description: Child node describing the main PMIC.
     type: object
@@ -59,6 +82,11 @@ examples:
         mboxes = <&ap2apm_mailbox>;
         shmem = <&apm_sram>;
 
+        clocks {
+            compatible = "google,gs101-acpm-dvfs-clocks";
+            #clock-cells = <1>;
+        };
+
         pmic {
             compatible = "samsung,s2mpg10-pmic";
             interrupts-extended = <&gpa0 6 IRQ_TYPE_LEVEL_LOW>;
diff --git a/include/dt-bindings/clock/google,gs101.h b/include/dt-bindings/clock/google,gs101.h
index 442f9e9037dc33198a1cee20af62fc70bbd96605..f1d0df412fdd49b300db4ba88bc0b1674cf0cdf8 100644
--- a/include/dt-bindings/clock/google,gs101.h
+++ b/include/dt-bindings/clock/google,gs101.h
@@ -634,4 +634,19 @@
 #define CLK_GOUT_PERIC1_CLK_PERIC1_USI9_USI_CLK		45
 #define CLK_GOUT_PERIC1_SYSREG_PERIC1_PCLK		46
 
+#define CLK_ACPM_DVFS_MIF				0
+#define CLK_ACPM_DVFS_INT				1
+#define CLK_ACPM_DVFS_CPUCL0				2
+#define CLK_ACPM_DVFS_CPUCL1				3
+#define CLK_ACPM_DVFS_CPUCL2				4
+#define CLK_ACPM_DVFS_G3D				5
+#define CLK_ACPM_DVFS_G3DL2				6
+#define CLK_ACPM_DVFS_TPU				7
+#define CLK_ACPM_DVFS_INTCAM				8
+#define CLK_ACPM_DVFS_TNR				9
+#define CLK_ACPM_DVFS_CAM				10
+#define CLK_ACPM_DVFS_MFC				11
+#define CLK_ACPM_DVFS_DISP				12
+#define CLK_ACPM_DVFS_BO				13
+
 #endif /* _DT_BINDINGS_CLOCK_GOOGLE_GS101_H */

-- 
2.51.0.rc1.167.g924127e9c0-goog