u-boot.git/drivers/pci, branch v2020.07

pci: Make Rockchip PCIe voltage regulators optional

2020-05-29T09:59:49+00:00

The vpcie*-supply properties are optional and these are absent on
boards like the ROCKPro64 and Firefly RK3399 where the voltage is
supplied by always-on regulators that are already enabled upon
boot.  Make these regulators optional and properly check their
presence before attempting to enable them.

Makes PCIe work on un U-Boot on the boards mentioned above.

Signed-off-by: Mark Kettenis 
Reviewed-by: Kever Yang 
Tested-by: Marcin Juszkiewicz

pci: Add Rockchip PCIe PHY controller driver

2020-05-22T12:53:20+00:00

Yes, it is possible to have a dedicated UCLASS PHY driver
for this Rockchip PCIe PHY but there are some issues on
Generic PHY framework to support the same.

The Generic PHY framework is unable to get the PHY if
the PHY parent is of a different uclass.

Say if we try to get the PCIe PHY then the phy-uclass
will look for PHY in the first instance if it is not
in the root node it will try to probe the parent by
assuming that the actual PHY is inside the parent PHY
of UCLASS_PHY. But, in rk3399 hardware representation
PHY like emmc, usb and pcie are part of syscon which
is completely a different of UCLASS_SYSCON.

Example:

grf: syscon@ff770000 {
   compatible = "rockchip,rk3399-grf", "syscon", "simple-mfd";
   reg = <0x0 0xff770000 0x0 0x10000>;
   #address-cells = <1>;
   #size-cells = <1>;

   pcie_phy: pcie-phy {
       compatible = "rockchip,rk3399-pcie-phy";
       clocks = <&cru SCLK_PCIEPHY_REF>;
       clock-names = "refclk";
       #phy-cells = <1>;
       resets = <&cru SRST_PCIEPHY>;
       drive-impedance-ohm = <50>;
       reset-names = "phy";
       status = "disabled";
   };
};

Due to this limitation, this patch adds a separate PHY
driver for Rockchip PCIe. This might be removed in future
once Generic PHY supports this limitation.

Signed-off-by: Jagan Teki 
Tested-by: Suniel Mahesh  #roc-rk3399-pc
Reviewed-by: Kever Yang

pci: Add Rockchip PCIe controller driver

2020-05-22T12:53:20+00:00

Add Rockchip PCIe controller driver for rk3399 platform.

Driver support Gen1 by operating as a Root complex.

Thanks to Patrick for initial work.

Signed-off-by: Patrick Wildt 
Signed-off-by: Jagan Teki 
Reviewed-by: Kever Yang 
Tested-by: Suniel Mahesh  #roc-rk3399-pc

common: Drop linux/bitops.h from common header

2020-05-19T01:19:23+00:00

Move this uncommon header out of the common header.

Signed-off-by: Simon Glass

common: Drop linux/delay.h from common header

2020-05-19T01:19:23+00:00

Move this uncommon header out of the common header.

Signed-off-by: Simon Glass

common: Drop log.h from common header

2020-05-19T01:19:18+00:00

Move this header out of the common header.

Signed-off-by: Simon Glass

common: Drop init.h from common header

2020-05-18T21:33:33+00:00

Move this uncommon header out of the common header.

Signed-off-by: Simon Glass

common: Drop bootstage.h from common header

2020-05-18T21:33:33+00:00

Move this fairly uncommon header out of the common header.

Signed-off-by: Simon Glass

rename symbol: CONFIG_TEGRA -> CONFIG_ARCH_TEGRA

2020-05-15T18:47:35+00:00

Have this symbol follow the pattern of all other such symbols.

Signed-off-by: Trevor Woerner

pci: Avoid auto-config when chain loading

2020-04-30T09:40:16+00:00

When U-Boot is not the first-stage bootloader we don't want to
re-configure the PCI devices, since this has already been done. Add a
check to avoid this.

Signed-off-by: Simon Glass 
Reviewed-by: Bin Meng