bcm63xx/u-boot/arch/arm/mach-tegra, branch master

ARM: tegra: Enable position independent build for 64-bit

2019-06-05T16:16:35Z

Note that U-Boot is always chainloaded from cboot starting with L4T release 28. cboot always loads U-Boot to a fixed address, so making the builds position independent isn't strictly necessary. However, position independent builds can be convenient because if U-Boot is ever loaded to an address different from its link address, it will still be able to boot. Signed-off-by: Thierry Reding Signed-off-by: Tom Warren

ARM: tegra: Import cbootargs value from cboot DTB

2019-06-05T16:16:34Z

Read the boot arguments passed by cboot via the /chosen/bootargs property and store it in the cbootargs environment variable. Signed-off-by: Thierry Reding Signed-off-by: Tom Warren

ARM: tegra: Implement cboot_get_ethaddr()

2019-06-05T16:16:34Z

This function will attempt to look up an Ethernet address in the DTB that was passed in from cboot. It does so by first trying to locate the default Ethernet device for the board (identified by the "ethernet" alias) and if found, reads the "local-mac-address" property. If the "ethernet" alias does not exist, or if it points to a device tree node that doesn't exist, or if the device tree node that it points to does not have a "local-mac-address" property or if the value is invalid, it will fall back to the legacy mechanism of looking for the MAC address stored in the "nvidia,ethernet-mac" or "nvidia,ether-mac" properties of the "/chosen" node. The MAC address is then written to the default Ethernet device for the board (again identified by the "ethernet" alias) in U-Boot's control DTB. This allows the device driver for that device to read the MAC address from the standard location in device tree. Signed-off-by: Thierry Reding Signed-off-by: Tom Warren

ARM: tegra: Implement cboot_save_boot_params() in C

2019-06-05T16:16:34Z

This is easier to deal with and works just as well for this simple function. Signed-off-by: Thierry Reding Signed-off-by: Tom Warren

ARM: tegra: Unify Tegra186 builds

2019-06-05T16:16:34Z

Tegra186 build are currently dealt with in very special ways, which is because Tegra186 is fundamentally different in many respects. It is no longer necessary to do many of the low-level programming because early boot firmware will already have taken care of it. Unfortunately, separating Tegra186 builds from the rest in this way makes it difficult to share code with prior generations of Tegra. With all of the low-level programming code behind Kconfig guards, the build for Tegra186 can again be unified. As a side-effect, and partial reason for this change, other Tegra SoC generations can now make use of the code that deals with taking over a boot from earlier bootloaders. This used to be nvtboot, but has been replaced by cboot nowadays. Rename the files and functions related to this to avoid confusion. The implemented protocols are unchanged. Signed-off-by: Thierry Reding Signed-off-by: Tom Warren

ARM: tegra: Workaround UDC boot issues only if necessary

2019-06-05T16:16:34Z

Resetting the USB device controller on boot is only necessary if the SoC actually has a UDC controller and U-Boot enables support for it. All the Tegra boards support UDC via the ChipIdea UDC driver, so make the UDC on boot workaround depend on the ChipIdea UDC driver. This prevents a crash on Tegra186 which does not have the ChipIdea UDC. Signed-off-by: Thierry Reding Signed-off-by: Tom Warren

ARM: tegra: Support TZ-only access to PMC

2019-06-05T16:16:34Z

Some devices may restrict access to the PMC to TrustZone software only. Non-TZ software can detect this and use SMC calls to the firmware that runs in the TrustZone to perform accesses to PMC registers. Note that this also fixes reset_cpu() and the enterrcm command on Tegra186 where they were previously trying to access the PMC at a wrong physical address. Based on work by Kalyani Chidambaram and Tom Warren . Signed-off-by: Thierry Reding Signed-off-by: Tom Warren

ARM: tegra: Fix save_boot_params() prototype

2019-06-05T16:16:33Z

The save_boot_params() function takes as its first four arguments the first four registers. On 32-bit ARM these are r0, r1, r2 and r3, all of which are 32 bits wide. However, on 64-bit ARM thene registers are x0, x1, x2 and x3, all of which are 64 bits wide. In order to allow reusing the save_boot_params() implementation on 64-bit ARM, change it to take unsigned long parameters rather than the fixed size 32-bit integers. This ensures that the correct values are passed. Signed-off-by: Thierry Reding Signed-off-by: Tom Warren

ARM: tegra: Guard powergate code with a Kconfig symbol

2019-06-05T16:16:33Z

Powergate code is not relevant on all Tegra SoC generations, so guard it with a Kconfig symbol that can be selected by the generations that need it. This is in preparation for unifying Tegra186 code with the code used on older generations. Signed-off-by: Thierry Reding Signed-off-by: Tom Warren

ARM: tegra: Guard pin controller code with a Kconfig symbol

2019-06-05T16:16:33Z

Pin controller code is not relevant on all Tegra SoC generations, so guard it with a Kconfig symbol that can be selected by the generations that need it. This is in preparation for unifying Tegra186 code with the code used on older generations. Signed-off-by: Thierry Reding Signed-off-by: Tom Warren