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arm64: dts: renesas: r8a779f0: spider: Enable PCIe Host ch0

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Enable PCIe Host controller channel 0 on R-Car S4-8 Spider board.

Since this board has an Oculink connector, CLKREQ# pin of PFC for PCIe
should not be used. So, using a GPIO is used to output the clock instead.
Otherwise the controller cannot detect a PCIe device.

Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20230905012404.2915246-3-yoshihiro.shimoda.uh@renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
This commit is contained in:
Yoshihiro Shimoda 2023-09-05 10:24:04 +09:00 committed by Geert Uytterhoeven
parent 183a709d37
commit c588e1c984
1 changed files with 24 additions and 0 deletions
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24
arch/arm64/boot/dts/renesas/r8a779f0-spider-cpu.dtsi
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@ -53,6 +53,12 @@
reg = <0x4 0x80000000 0x0 0x80000000>;
};
rc21012_pci: clk-rc21012-pci {
compatible = "fixed-clock";
clock-frequency = <100000000>;
#clock-cells = <0>;
};
rc21012_ufs: clk-rc21012-ufs {
compatible = "fixed-clock";
clock-frequency = <38400000>;
@ -106,6 +112,12 @@
reg = <0x20>;
gpio-controller;
#gpio-cells = <2>;
rc21012-gpio2-hog {
gpio-hog;
gpios = <5 GPIO_ACTIVE_LOW>;
output-high;
};
};
};
@ -145,6 +157,18 @@
status = "okay";
};
&pcie0_clkref {
compatible = "gpio-gate-clock";
clocks = <&rc21012_pci>;
enable-gpios = <&gpio2 15 GPIO_ACTIVE_LOW>;
/delete-property/ clock-frequency;
};
&pciec0 {
reset-gpio = <&gpio_exp_20 0 GPIO_ACTIVE_LOW>;
status = "okay";
};
&pfc {
pinctrl-0 = <&scif_clk_pins>;
pinctrl-names = "default";