Hi Sasha,
On Tue, Nov 7, 2023 at 1:21 PM Sasha Levin sashal@kernel.org wrote:
From: Yoshihiro Shimoda yoshihiro.shimoda.uh@renesas.com
[ Upstream commit c588e1c9846b32182fd5a0ceb637b983810e7100 ]
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@rene... Signed-off-by: Geert Uytterhoeven geert+renesas@glider.be Signed-off-by: Sasha Levin sashal@kernel.org
Thanks for your patch!
--- a/arch/arm64/boot/dts/renesas/r8a779f0-spider-cpu.dtsi +++ b/arch/arm64/boot/dts/renesas/r8a779f0-spider-cpu.dtsi
@@ -145,6 +157,18 @@ &mmc0 { 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";
These references have a hard dependency on commit 183a709d3719e5c9 ("arm64: dts: renesas: r8a779f0: Add PCIe Host and Endpoint nodes") in v6.6+ (i.e. v6.7-rc1 soon).
To actually work, this has a soft (runtime) dependency on commit 0d0c551011df4519 ("PCI: rcar-gen4: Add R-Car Gen4 PCIe controller support for host mode") in v6.6+.
Gr{oetje,eeting}s,
Geert