[PATCH v4 7/9] ARM: dts: porter: Enable SCIF_CLK frequency and pins

[Geert Uytterhoeven]

Add and enable the external crystal for the SCIF_CLK and its pinctrl, to
be used by the Baud Rate Generator for External Clock (BRG) on (H)SCIF.

This increases the range and accuracy of supported baud rates.

Signed-off-by: Geert Uytterhoeven <geert+rene...@glider.be>
---
Untested, based on hardware manual.

Note that U-Boot doesn't use SCIF_CLK on porter, like salvator-x, but
unlike all other supported R-Car Gen2 boards.

v4:
  - Change one-line summary prefix to match current arm-soc practices,

v3:
  - New.
---
 arch/arm/boot/dts/r8a7791-porter.dts | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/arch/arm/boot/dts/r8a7791-porter.dts 
b/arch/arm/boot/dts/r8a7791-porter.dts
index 5015eaa0ae50039e..ed1f6f884e2b2168 100644
--- a/arch/arm/boot/dts/r8a7791-porter.dts
+++ b/arch/arm/boot/dts/r8a7791-porter.dts
@@ -143,11 +143,19 @@
 };
 
 &pfc {
+       pinctrl-0 = <&scif_clk_pins>;
+       pinctrl-names = "default";
+
        scif0_pins: serial0 {
                renesas,groups = "scif0_data_d";
                renesas,function = "scif0";
        };
 
+       scif_clk_pins: scif_clk {
+               renesas,groups = "scif_clk";
+               renesas,function = "scif_clk";
+       };
+
        ether_pins: ether {
                renesas,groups = "eth_link", "eth_mdio", "eth_rmii";
                renesas,function = "eth";
@@ -221,6 +229,11 @@
        status = "okay";
 };
 
+&scif_clk {
+       clock-frequency = <14745600>;
+       status = "okay";
+};
+
 &ether {
        pinctrl-0 = <&ether_pins &phy1_pins>;
        pinctrl-names = "default";
-- 
1.9.1