From: Hiromitsu Yamasaki <hiromitsu.yamasaki.ym@xxxxxxxxxxx>
This patch adds the pin control for HSCIF1, and supports connection with
the Debug Serial-1 (CN26) on Salvator boards.
SCIF1 and HSCI1 are sharing the pin connected to the Debug Serial-1
(CN26) on Salvator boards, and it is necessary to use it by exclusion.
As for the default of this DeviceTree, SCIF1 is connected.
Signed-off-by: Hiromitsu Yamasaki <hiromitsu.yamasaki.ym@xxxxxxxxxxx>
Signed-off-by: Takeshi Kihara <takeshi.kihara.df@xxxxxxxxxxx>
[geert: Add missing "uart-has-rtscts"]
Signed-off-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
---
This depends on "arm64: dts: renesas: r8a77965: Add all HSCIF nodes",
due to the &hscif1 reference.
This doesn't really change anything, but serves as an example and
documentation.
Questions:
1. Do we want to have such examples/documentation?
2. Should we make HSCIF1 the default? IMHO, HSCIF is superior to SCIF.
Both are served by the same driver, so increased kernel size is not
a counter-argument.
For comparison: r8a7790-lager.dts uses SCIFA1 instead of SCIF1 for
the debug serial (not for the serial console, due to earlycon and
U-Boot compatibility).
arch/arm64/boot/dts/renesas/salvator-common.dtsi | 15 +++++++++++++++
1 file changed, 15 insertions(+)
diff --git a/arch/arm64/boot/dts/renesas/salvator-common.dtsi b/arch/arm64/boot/dts/renesas/salvator-common.dtsi
index 9256fbaaab7f3297..976fda67e202f054 100644
--- a/arch/arm64/boot/dts/renesas/salvator-common.dtsi
+++ b/arch/arm64/boot/dts/renesas/salvator-common.dtsi
@@ -341,6 +341,15 @@
clock-frequency = <32768>;
};
+&hscif1 {
+ pinctrl-0 = <&hscif1_pins>;
+ pinctrl-names = "default";
+
+ uart-has-rtscts;
+ /* Please use exclusively to the scif1 node */
+ /* status = "okay"; */
+};
+
&hsusb {
dr_mode = "otg";
status = "okay";
@@ -546,6 +555,11 @@
function = "du";
};
+ hscif1_pins: hscif1 {
+ groups = "hscif1_data_a", "hscif1_ctrl_a";
+ function = "hscif1";
+ };
+
i2c2_pins: i2c2 {
groups = "i2c2_a";
function = "i2c2";
@@ -711,6 +725,7 @@
pinctrl-names = "default";
uart-has-rtscts;
+ /* Please use exclusively to the hscif1 node */
status = "okay";
};
--
2.7.4
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