[PATCH v1 1/2] arm64: dts: mediatek: mt8195: Add subsys clks for PCIe power domains

[AngeloGioacchino Del Regno]

The PCIe MAC needs the sram to be powered on for internal IP
access and it has always worked before because the bootloader
on Chromebooks was leaving the PCIe PERI_AO MEM clocks on
before booting the kernel.
Add the SRAM (mem) clock as a subsystem clock on the PCIe MAC
P0 and P1 to correctly describe the hardware and to avoid any
issue with bootloaders behaving differently.

Fixes: 2b515194bf0c ("arm64: dts: mt8195: Add power domains controller")
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno at collabora.com>
---
 arch/arm64/boot/dts/mediatek/mt8195.dtsi | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/arm64/boot/dts/mediatek/mt8195.dtsi b/arch/arm64/boot/dts/mediatek/mt8195.dtsi
index b33726da900b..0cb96cba727a 100644
--- a/arch/arm64/boot/dts/mediatek/mt8195.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt8195.dtsi
@@ -792,12 +792,16 @@ power-domain at MT8195_POWER_DOMAIN_CAM_MRAW {
 
 				power-domain at MT8195_POWER_DOMAIN_PCIE_MAC_P0 {
 					reg = <MT8195_POWER_DOMAIN_PCIE_MAC_P0>;
+					clocks = <&pericfg_ao CLK_PERI_AO_PCIE_P0_MEM>;
+					clock-names = "ss-pextp0-mem";
 					mediatek,infracfg = <&infracfg_ao>;
 					#power-domain-cells = <0>;
 				};
 
 				power-domain at MT8195_POWER_DOMAIN_PCIE_MAC_P1 {
 					reg = <MT8195_POWER_DOMAIN_PCIE_MAC_P1>;
+					clocks = <&pericfg_ao CLK_PERI_AO_PCIE_P1_MEM>;
+					clock-names = "ss-pextp1-mem";
 					mediatek,infracfg = <&infracfg_ao>;
 					#power-domain-cells = <0>;
 				};
-- 
2.48.1