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arm64: dts: salvator-x: Enable SCIF_CLK frequency and pins

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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:
  - SCIF:
      - Supports now 50, 230400, 460800, 500000, and 921600 bps,
      - Perfect match for standard 50-460800, and 9216000 bps.
  - HSCIF:
      - Supports now 50, 75, and 110 bps,
      - Perfect match for standard 50-460800, and 9216000 bps.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
This commit is contained in:
Geert Uytterhoeven 2016-01-29 11:17:26 +01:00 committed by Simon Horman
parent 3da41e4cf6
commit a3fc85e27b
1 changed files with 12 additions and 0 deletions
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12
arch/arm64/boot/dts/renesas/r8a7795-salvator-x.dts
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@ -93,6 +93,9 @@ &extal_clk {
};
&pfc {
pinctrl-0 = <&scif_clk_pins>;
pinctrl-names = "default";
scif1_pins: scif1 {
renesas,groups = "scif1_data_a", "scif1_ctrl";
renesas,function = "scif1";
@ -101,6 +104,10 @@ scif2_pins: scif2 {
renesas,groups = "scif2_data_a";
renesas,function = "scif2";
};
scif_clk_pins: scif_clk {
renesas,groups = "scif_clk_a";
renesas,function = "scif_clk";
};
i2c2_pins: i2c2 {
renesas,groups = "i2c2_a";
@ -138,6 +145,11 @@ &scif2 {
status = "okay";
};
&scif_clk {
clock-frequency = <14745600>;
status = "okay";
};
&i2c2 {
pinctrl-0 = <&i2c2_pins>;
pinctrl-names = "default";