Add PEX deep power down states as pinctrl properties to set in PCIe driver.
In Tegra210, BIAS pads are not in power down mode when clamps are applied.
To set the pads in DPD, pass the PEX DPD states as pinctrl properties to
PCIe driver.
Signed-off-by: Manikanta Maddireddy <mmaddireddy@xxxxxxxxxx>
---
V2: Using standard pinctrl names, default and idle
arch/arm64/boot/dts/nvidia/tegra210.dtsi | 19 +++++++++++++++++++
1 file changed, 19 insertions(+)
diff --git a/arch/arm64/boot/dts/nvidia/tegra210.dtsi b/arch/arm64/boot/dts/nvidia/tegra210.dtsi
index a550c0a4d572..3899c54ea28f 100644
--- a/arch/arm64/boot/dts/nvidia/tegra210.dtsi
+++ b/arch/arm64/boot/dts/nvidia/tegra210.dtsi
@@ -48,6 +48,11 @@
<&tegra_car 72>,
<&tegra_car 74>;
reset-names = "pex", "afi", "pcie_x";
+
+ pinctrl-names = "default", "idle";
+ pinctrl-0 = <&pex_dpd_disable>;
+ pinctrl-1 = <&pex_dpd_enable>;
+
status = "disabled";
pci@1,0 {
@@ -848,6 +853,20 @@
pins = "sdmmc3";
power-source = <TEGRA_IO_PAD_VOLTAGE_1V8>;
};
+
+ pex_dpd_disable: pex_en {
+ pex-dpd-disable {
+ pins = "pex-bias", "pex-clk1", "pex-clk2";
+ low-power-disable;
+ };
+ };
+
+ pex_dpd_enable: pex_dis {
+ pex-dpd-enable {
+ pins = "pex-bias", "pex-clk1", "pex-clk2";
+ low-power-enable;
+ };
+ };
};
fuse@7000f800 {
--
2.17.1
