This adds a bcm2835 mailbox driver for the RPi to talk to the on-SoC VideoCore. See [1] for a description. This patchset uses it to get two properties, the eMMC clock and the memory size. The RPi backend needs to use this driver early on, namely before the MMU setup. We also want to use the driver in the future after the MMU setup, like setting up simplefb for the kernel. Patch 1 and 2 lay the groundwork for that. The mailbox driver also needs to handle timouts, so patch 5 and 6 are making the clocksource accessible earlier. Patch 7 is the driver itself, providing a helper macro for users based on a new common macro from patch 3. Patch 8 and 9 switch the bc2835_mci driver from a local mailbox implementation to the new driver. Patch 10 uses the driver to get the proper memory size. Patch 4 is just a cleanup. Thanks, Andre [1] https://github.com/raspberrypi/firmware/wiki/Mailboxes Andre Heider (10): ARM: cache: restore cache functions from the PBL ARM: cache: do not crash when the MMU isn't yet setup common: add a macro to align an array on the stack ARM: bcm2835: cleanup clock registering ARM: bcm2835: register the clocksource driver earlier ARM: bcm2835: register the clocksource device earlier ARM: bcm2835: add a mailbox driver for VideoCore ARM: rpi: register a clkdev for the eMMC clock mci: bcm2835: use the registered device clkdev ARM: rpi: use the proper ARM memory size arch/arm/boards/raspberry-pi/rpi.c | 75 +++++- arch/arm/cpu/cache.c | 18 +- arch/arm/cpu/start.c | 4 +- arch/arm/mach-bcm2835/Makefile | 2 +- arch/arm/mach-bcm2835/core.c | 32 +-- arch/arm/mach-bcm2835/include/mach/mbox.h | 420 ++++++++++++++++++++++++++++++ arch/arm/mach-bcm2835/mbox.c | 152 +++++++++++ drivers/clocksource/bcm2835.c | 2 +- drivers/mci/mci-bcm2835.c | 93 ++----- drivers/mci/mci-bcm2835.h | 48 ---- include/common.h | 11 + 11 files changed, 700 insertions(+), 157 deletions(-) create mode 100644 arch/arm/mach-bcm2835/include/mach/mbox.h create mode 100644 arch/arm/mach-bcm2835/mbox.c -- 1.8.3.2 _______________________________________________ barebox mailing list barebox@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/barebox
