All supported Meson SoCs have a random number generator in CBUS.
Newer SoCs (GXBB, GXL and GXM) provide only one 32-bit random number
register, whereas the older SoCs (Meson6, Meson8 and Meson8b) have two
32-bit random number registers. The existing meson-rng driver only
supports the lower 32-bit - but it still works fine on the older SoCs
apart from this small limitation.
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@xxxxxxxxxxxxxx>
Reviewed-by: Neil Armstrong <narmstrong@xxxxxxxxxxxx>
---
arch/arm/boot/dts/meson.dtsi | 5 +++++
arch/arm/boot/dts/meson8.dtsi | 6 ++++++
arch/arm/boot/dts/meson8b.dtsi | 6 ++++++
3 files changed, 17 insertions(+)
diff --git a/arch/arm/boot/dts/meson.dtsi b/arch/arm/boot/dts/meson.dtsi
index 46706d74a145..bf37606ba82e 100644
--- a/arch/arm/boot/dts/meson.dtsi
+++ b/arch/arm/boot/dts/meson.dtsi
@@ -80,6 +80,11 @@
#size-cells = <1>;
ranges = <0x0 0xc1100000 0x200000>;
+ hwrng: rng@8100 {
+ compatible = "amlogic,meson-rng";
+ reg = <0x8100 0x8>;
+ };
+
uart_A: serial@84c0 {
compatible = "amlogic,meson-uart";
reg = <0x84c0 0x18>;
diff --git a/arch/arm/boot/dts/meson8.dtsi b/arch/arm/boot/dts/meson8.dtsi
index df79a34a3530..b4c5fdd7b451 100644
--- a/arch/arm/boot/dts/meson8.dtsi
+++ b/arch/arm/boot/dts/meson8.dtsi
@@ -241,6 +241,12 @@
clock-names = "stmmaceth";
};
+&hwrng {
+ compatible = "amlogic,meson8-rng", "amlogic,meson-rng";
+ clocks = <&clkc CLKID_RNG0>;
+ clock-names = "core";
+};
+
&i2c_AO {
clocks = <&clkc CLKID_CLK81>;
};
diff --git a/arch/arm/boot/dts/meson8b.dtsi b/arch/arm/boot/dts/meson8b.dtsi
index 1c09090ff4a5..a9d7074e6369 100644
--- a/arch/arm/boot/dts/meson8b.dtsi
+++ b/arch/arm/boot/dts/meson8b.dtsi
@@ -171,6 +171,12 @@
};
};
+&hwrng {
+ compatible = "amlogic,meson8b-rng", "amlogic,meson-rng";
+ clocks = <&clkc CLKID_RNG0>;
+ clock-names = "core";
+};
+
&L2 {
arm,data-latency = <3 3 3>;
arm,tag-latency = <2 2 2>;
--
2.13.1
--
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