[PATCH v4 2/5] realtek: Add Lexra bus clock
Sander Vanheule
sander at svanheule.net
Sun Nov 14 10:45:31 PST 2021
The CPU peripherals on RTL83xx/RTL930x are connected to the CPU via the
Lexra bus. This bus can provide a clock signal to these peripherals, but
no clock driver is currently available. Instead, use a fixed-clock to
provide the clock frequency, and update the dependent peripherals.
Lexra bus clock frequencies:
- RTL838x: 200MHz
- RTL839x: 200MHz
- RTL930x: 175MHz
Signed-off-by: Sander Vanheule <sander at svanheule.net>
--
v2:
- Lexra clock defintion for RTL930x, update peripherals
---
target/linux/realtek/dts-5.10/rtl838x.dtsi | 10 ++++++++--
target/linux/realtek/dts-5.10/rtl930x.dtsi | 11 +++++------
2 files changed, 13 insertions(+), 8 deletions(-)
diff --git a/target/linux/realtek/dts-5.10/rtl838x.dtsi b/target/linux/realtek/dts-5.10/rtl838x.dtsi
index a33b6d899e2a..dc60e12bad0b 100644
--- a/target/linux/realtek/dts-5.10/rtl838x.dtsi
+++ b/target/linux/realtek/dts-5.10/rtl838x.dtsi
@@ -68,6 +68,12 @@
bootargs = "console=ttyS0,115200";
};
+ lx_clk: lx_clk {
+ compatible = "fixed-clock";
+ #clock-cells = <0>;
+ clock-frequency = <200000000>;
+ };
+
cpuintc: cpuintc {
compatible = "mti,cpu-interrupt-controller";
#address-cells = <0>;
@@ -116,7 +122,7 @@
compatible = "ns16550a";
reg = <0x2000 0x100>;
- clock-frequency = <200000000>;
+ clocks = <&lx_clk>;
interrupt-parent = <&intc>;
interrupts = <31>;
@@ -134,7 +140,7 @@
compatible = "ns16550a";
reg = <0x2100 0x100>;
- clock-frequency = <200000000>;
+ clocks = <&lx_clk>;
interrupt-parent = <&intc>;
interrupts = <30>;
diff --git a/target/linux/realtek/dts-5.10/rtl930x.dtsi b/target/linux/realtek/dts-5.10/rtl930x.dtsi
index e53f506a956f..9e9501d51ad5 100644
--- a/target/linux/realtek/dts-5.10/rtl930x.dtsi
+++ b/target/linux/realtek/dts-5.10/rtl930x.dtsi
@@ -80,11 +80,10 @@
interrupt-controller;
};
- osc: oscillator {
+ lx_clk: lx_clk {
compatible = "fixed-clock";
- #clock-cells = <1>;
+ #clock-cells = <0>;
clock-frequency = <175000000>;
- clock-output-names = "osc";
};
soc: soc {
@@ -119,7 +118,7 @@
interrupt-parent = <&intc>;
interrupts = <8>;
interrupt-names = "ostimer";
- clocks = <&osc 0>;
+ clocks = <&lx_clk>;
};
spi0: spi at 1200 {
@@ -134,7 +133,7 @@
compatible = "ns16550a";
reg = <0x2000 0x100>;
- clock-frequency = <175000000>;
+ clocks = <&lx_clk>;
interrupt-parent = <&intc>;
interrupts = <30>;
@@ -149,7 +148,7 @@
compatible = "ns16550a";
reg = <0x2100 0x100>;
- clock-frequency = <175000000>;
+ clocks = <&lx_clk>;
interrupt-parent = <&intc>;
interrupts = <31>;
--
2.33.1
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