Describe the external SCIF clock crystal, which can be used as a clock
source for the (High Speed) Serial Communication Interfaces with FIFO.
This improves serial console accuracy from 115200-257 bps to
115200+0 bps.
Signed-off-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
---
Tested with a remote Eagle.
To be queued in renesas-devel for v6.3.
---
arch/arm64/boot/dts/renesas/r8a77970-eagle.dts | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/arch/arm64/boot/dts/renesas/r8a77970-eagle.dts b/arch/arm64/boot/dts/renesas/r8a77970-eagle.dts
index 004a5eacd460da95..405404c0843d9747 100644
--- a/arch/arm64/boot/dts/renesas/r8a77970-eagle.dts
+++ b/arch/arm64/boot/dts/renesas/r8a77970-eagle.dts
@@ -287,6 +287,9 @@ lvds0_out: endpoint {
};
&pfc {
+ pinctrl-0 = <&scif_clk_pins>;
+ pinctrl-names = "default";
+
avb_pins: avb0 {
groups = "avb0_mdio", "avb0_rgmii", "avb0_txcrefclk";
function = "avb0";
@@ -316,6 +319,11 @@ scif0_pins: scif0 {
groups = "scif0_data";
function = "scif0";
};
+
+ scif_clk_pins: scif_clk {
+ groups = "scif_clk_b";
+ function = "scif_clk";
+ };
};
&rpc {
@@ -391,3 +399,7 @@ &scif0 {
status = "okay";
};
+
+&scif_clk {
+ clock-frequency = <14745600>;
+};
--
2.34.1
