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Date: Mon, 4 Mar 2019 11:58:02 +0100
From: Neil Armstrong <narmstrong@...libre.com>
To: daniel@...ll.ch
Cc: Neil Armstrong <narmstrong@...libre.com>,
dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-amlogic@...ts.infradead.org,
linux-arm-kernel@...ts.infradead.org
Subject: [PATCH v3] dt-bindings: gpu: add bindings for the ARM Mali Bifrost GPU
Add the bindings for the Bifrost family of ARM Mali GPUs.
The Bifrost GPU architecture is similar to the Midgard family,
but with a different Shader Core & Execution Engine structures.
Bindings are based on the Midgard family bindings, but the inner
architectural changes makes it a separate family needing separate
bindings.
The Bifrost GPUs are present in a number of recent SoCs, like the
Amlogic G12A Family, and many other vendors.
The Amlogic vendor specific compatible is added to handle the
specific IP integration differences and dependencies.
Signed-off-by: Neil Armstrong <narmstrong@...libre.com>
---
.../bindings/gpu/arm,mali-bifrost.txt | 90 +++++++++++++++++++
1 file changed, 90 insertions(+)
create mode 100644 Documentation/devicetree/bindings/gpu/arm,mali-bifrost.txt
Changes since v2:
- moved to a single compatible since HW is fully discoverable
diff --git a/Documentation/devicetree/bindings/gpu/arm,mali-bifrost.txt b/Documentation/devicetree/bindings/gpu/arm,mali-bifrost.txt
new file mode 100644
index 000000000000..e068fccf4ce9
--- /dev/null
+++ b/Documentation/devicetree/bindings/gpu/arm,mali-bifrost.txt
@@ -0,0 +1,90 @@
+ARM Mali Bifrost GPU
+====================
+
+Required properties:
+
+- compatible :
+ * Must contain one the following:
+ + "arm,mali-bifrost"
+ * which must be preceded by one of the following vendor specifics:
+ + "amlogic,meson-g12a-mali"
+
+- reg : Physical base address of the device and length of the register area.
+
+- interrupts : Contains the three IRQ lines required by Mali Bifrost devices.
+
+- interrupt-names : Contains the names of IRQ resources in the order they were
+ provided in the interrupts property. Must contain: "job", "mmu", "gpu".
+
+Optional properties:
+
+- clocks : Phandle to clock for the Mali Bifrost device.
+
+- mali-supply : Phandle to regulator for the Mali device. Refer to
+ Documentation/devicetree/bindings/regulator/regulator.txt for details.
+
+- operating-points-v2 : Refer to Documentation/devicetree/bindings/opp/opp.txt
+ for details.
+
+- resets : Phandle of the GPU reset line.
+
+Vendor-specific bindings
+------------------------
+
+The Mali GPU is integrated very differently from one SoC to
+another. In order to accomodate those differences, you have the option
+to specify one more vendor-specific compatible, among:
+
+- "amlogic,meson-g12a-mali"
+ Required properties:
+ - resets : Should contain phandles of :
+ + GPU reset line
+ + GPU APB glue reset line
+
+Example for a Mali-G31:
+
+gpu@...30000 {
+ compatible = "amlogic,meson-g12a-mali", "arm,mali-bifrost";
+ reg = <0xffe40000 0x10000>;
+ interrupts = <GIC_SPI 160 IRQ_TYPE_LEVEL_HIGH>,
+ <GIC_SPI 161 IRQ_TYPE_LEVEL_HIGH>,
+ <GIC_SPI 162 IRQ_TYPE_LEVEL_HIGH>;
+ interrupt-names = "job", "mmu", "gpu";
+ clocks = <&clk CLKID_MALI>;
+ mali-supply = <&vdd_gpu>;
+ operating-points-v2 = <&gpu_opp_table>;
+ resets = <&reset RESET_DVALIN_CAPB3>, <&reset RESET_DVALIN>;
+};
+
+gpu_opp_table: opp_table0 {
+ compatible = "operating-points-v2";
+
+ opp@...000000 {
+ opp-hz = /bits/ 64 <533000000>;
+ opp-microvolt = <1250000>;
+ };
+ opp@...000000 {
+ opp-hz = /bits/ 64 <450000000>;
+ opp-microvolt = <1150000>;
+ };
+ opp@...000000 {
+ opp-hz = /bits/ 64 <400000000>;
+ opp-microvolt = <1125000>;
+ };
+ opp@...000000 {
+ opp-hz = /bits/ 64 <350000000>;
+ opp-microvolt = <1075000>;
+ };
+ opp@...000000 {
+ opp-hz = /bits/ 64 <266000000>;
+ opp-microvolt = <1025000>;
+ };
+ opp@...000000 {
+ opp-hz = /bits/ 64 <160000000>;
+ opp-microvolt = <925000>;
+ };
+ opp@...000000 {
+ opp-hz = /bits/ 64 <100000000>;
+ opp-microvolt = <912500>;
+ };
+};
--
2.20.1
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