Hi list,
This is the third, and hopefully final, version of my patchset for PSCI support on R528/T113-s3. This one, as always, depends on Andre Przywara's T113s support series (v2), available on the list and also located on a Git branch at: https://source.denx.de/u-boot/custodians/u-boot-sunxi.git t113s-v2
NOTE THAT THIS ALSO depends on the following commit on master: 3d5e52bd97 ("ARM: psci: move GIC address override to Kconfig")
For testing: I can confirm that patch 2/4 results in no change to machine code whatsoever on any supported target. Patch 1/4 results in a minor machine code change on R40 only. Patch 3/4 will likely require testing on each of the 4 "special case" sunxi targets (sun6i, sun7i, R40, H3) to ensure that register offsets are kept consistent. Patch 4/4 needs testing on R528 only.
Warm regards, Sam
Changes v3->v4: - The GIC base address override is done through Kconfig, instead of in sunxi-common.h
Changes v2->v3: - Fix missing `cpu=0;` for the sun7i power management case. - Make sunxi_cpu_power_off() a static function, per feedback on v2. - Kevin Amadiva of MEC electronics got in touch with me off-list, reported success bringing up CPU1 of a T113 with this patchset, and kindly provided me with a Tested-by tag for patch 4/4. - Remove a comment about R40/R528 being special, per feedback on v2. - Simplify an if statement, per feedback on v2. - Add missing 'select' directives to the R528 Kconfig, per feedback on v2.
Changes v1->v2: - Power clamp is now adjusted ONLY on sun{6,7}i, H3, R40. The previous version was mistakenly doing this EXCEPT on those machines. - Flattened sunxi_power_switch() into sunxi_cpu_set_power() for simplicity's sake. - Moved the "power clamp is not NULL" conditional into sunxi_cpu_set_power(). - Removed unnecessary H6 special-case, since H6 is actually ARM64. - Renamed SUNXI_CPUX_BASE to SUNXI_CPUCFG_BASE, to mirror expected changes in Andre's v2 of the R528 series (we decided against using a new name for this block). - Removed sunxi_cpucfg_reg struct, and stopped using the PRCM struct in psci.c.
Sam Edwards (4): sunxi: psci: clean away preprocessor macros sunxi: psci: refactor register access to separate functions sunxi: psci: stop modeling register layout with C structs sunxi: psci: implement PSCI on R528
arch/arm/cpu/armv7/Kconfig | 3 +- arch/arm/cpu/armv7/sunxi/psci.c | 185 ++++++++++++++--------- arch/arm/include/asm/arch-sunxi/cpucfg.h | 67 -------- arch/arm/mach-sunxi/Kconfig | 4 + 4 files changed, 121 insertions(+), 138 deletions(-) delete mode 100644 arch/arm/include/asm/arch-sunxi/cpucfg.h