bcm63xx/atf/plat/allwinner/common/include, branch master

allwinner: Clean up CPU ops functions

2019-02-18T03:12:51Z

Convert them to take an mpidr instead of a (cluster, core) pair. This simplifies all of the call sites, and actually makes the functions a bit smaller. Signed-off-by: Samuel Holland

Sanitise includes across codebase

2019-01-04T10:43:17Z

Enforce full include path for includes. Deprecate old paths. The following folders inside include/lib have been left unchanged: - include/lib/cpus/${ARCH} - include/lib/el3_runtime/${ARCH} The reason for this change is that having a global namespace for includes isn't a good idea. It defeats one of the advantages of having folders and it introduces problems that are sometimes subtle (because you may not know the header you are actually including if there are two of them). For example, this patch had to be created because two headers were called the same way: e0ea0928d5b7 ("Fix gpio includes of mt8173 platform to avoid collision."). More recently, this patch has had similar problems: 46f9b2c3a282 ("drivers: add tzc380 support"). This problem was introduced in commit 4ecca33988b9 ("Move include and source files to logical locations"). At that time, there weren't too many headers so it wasn't a real issue. However, time has shown that this creates problems. Platforms that want to preserve the way they include headers may add the removed paths to PLAT_INCLUDES, but this is discouraged. Change-Id: I39dc53ed98f9e297a5966e723d1936d6ccf2fc8f Signed-off-by: Antonio Nino Diaz

Standardise header guards across codebase

2018-11-08T10:20:19Z

All identifiers, regardless of use, that start with two underscores are reserved. This means they can't be used in header guards. The style that this project is now to use the full name of the file in capital letters followed by 'H'. For example, for a file called "uart_example.h", the header guard is UART_EXAMPLE_H. The exceptions are files that are imported from other projects: - CryptoCell driver - dt-bindings folders - zlib headers Change-Id: I50561bf6c88b491ec440d0c8385c74650f3c106e Signed-off-by: Antonio Nino Diaz

allwinner: Prepare for executing code on the management processor

2018-10-20T15:23:59Z

The more recent Allwinner SoCs contain an OpenRISC management controller (called arisc or CPUS), which shares the bus with the ARM cores, but runs on a separate power domain. This is meant to handle power management with the ARM cores off. There are efforts to run sophisticated firmware on that core (communicating via SCPI with the ARM world), but for now can use it for the rather simple task of helping to turn the ARM cores off. As this cannot be done by ARM code itself (because execution stops at the first of the three required steps), we can offload some instructions to this management processor. This introduces a helper function to hand over a bunch of instructions and triggers execution. We introduce a bakery lock to avoid two cores trying to use that (single) arisc core. The arisc code is expected to put itself into reset after is has finished execution. Signed-off-by: Andre Przywara

allwinner: Pass FDT address to sunxi_pmic_setup()

2018-10-20T15:23:59Z

For Allwinner boards we now use some heuritistics to find a preloaded .dtb file. Pass this address on to the PMIC setup routine, so that it can use the information contained therein to setup some initial power rails. Signed-off-by: Andre Przywara

allwinner: Find DTB in BL33 image

2018-10-20T15:23:59Z

The initial PMIC setup for the Allwinner platform is quite board specific, and used to be guarded by reading the .dtb stub *name* from the SPL image in the legacy ATF port. This doesn't scale particularly well, and requires constant maintainance. Instead having the actual .dtb available would be much better, as the PMIC setup requirements could be read from there directly. The only available BL33 for Allwinner platforms so far is U-Boot, and fortunately U-Boot comes with the full featured .dtb, appended to the end of the U-Boot image. Introduce some code that scans the beginning of the BL33 image to look for the load address, which is followed by the image size. Adding those two values together gives us the end of the image and thus the .dtb address. Verify that this heuristic is valid by sanitising some values and checking the DTB magic. Print out the DTB address and the model name, if specified in the root node. Signed-off-by: Andre Przywara

allwinner: H6: Factor out I2C platform setup

2018-10-20T15:23:59Z

In the H6 platform code there is a routine to do the platform initialisation of the R_I2C controller. We will need a very similar setup routine to initialise the RSB controller on the A64. Move this code to sunxi_common.c and generalise it to support all SoCs and also to cover the related RSB bus. Signed-off-by: Andre Przywara

allwinner: Introduce GPIO helper function

2018-10-20T15:23:59Z

Many boards without a dedicated PMIC contain simple regulators, which can be controlled via GPIO pins. To later allow turning them off easily, introduce a simple function to configure a given pin as a GPIO out pin and set it to the desired level. Signed-off-by: Andre Przywara

allwinner: Export sunxi_private.h

2018-10-20T15:23:59Z

So far we have a sunxi_private.h header file in the common code directory. This holds the prototypes of various functions we share in *common* code. However we will need some of those in the platform specific code parts as well, and want to introduce new functions shared across the whole platform port. So move the sunxi_private.h file into the common/include directory, so that it becomes visible to all parts of the platform code. Fix up the existing #includes and add missing ones, also add the sunxi_read_soc_id() prototype here. This will be used in follow up patches. Signed-off-by: Andre Przywara

allwinner: Introduce names for SoC IDs

2018-10-20T15:23:59Z

We will soon make more use of the Allwinner SoC ID, to differentiate the platform setup. Introduce definitions to avoid dealing with magic numbers and make the code more readable. Signed-off-by: Andre Przywara