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Device Tree port
lp0 edited this page May 20, 2012
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- mmc doesn't work in 3.4 for some reason
- dma is required for mmc
- implementing dma will allow the mmc changes to be less complex
- once mmc is supported by dma then the device tree branch can be pushed upstream and mmc, usb, ethernet mac, audio, vchiq and vc-mem can be added on in a local branch for now so that everything is still working
- The bcm_dma_* exports are going to go away - the kernel already has a DMA API
- irq handler
- mmio clocksource
- mmio clockevent (system timer)
- sp804 (to detect and disable it)
- uart0 (pl011)
- watchdog
- clk/clkdev (not dt)
- bcm-mbox (aka vcio)
- fb
- video logo
- bcm-bell
- system_serial/system_rev/mac_address
- bcm-vc-power (currently both devices are always on)
- lp0/rpi01-mach (rebased continuously)
- lp0/rpi02-plat (rebased continuously)
- lp0/rpi-linear
- lp0/rpi-next (pinctrl/pinmux/gpio)
- clk/clkdev (when it gains dt support)
- gpio (needs pinctrl/pinmux)
- ok-led (needs gpio)
- usb (uses bcm-vc-power, hack in the current dwc_otg code until a proper driver is merged)
- ethernet mac address (tricky, some way to absolutely identify that the usb device is the board's and not from somewhere else on the bus might help)
- dma irq (aka dmaman)
- mmc/emmc (aka sdhci, needs dma, uses bcm-vc-power)
- pinmux (needed by everything that uses a configurable pin)
- pinconf (for pull high/low)
- gpio irq (note: there appear to be 3 gpio banks using IRQs 17, 18 and 19 with IRQ 20 as "all banks" - only 2 banks are in use)
- audio
- spi
- spi irq
- spi dma
- i2c
- i2c irq
- i2c dma
- pwm
- gpio clock (needs pinmux, the clk subsystem can be used to turn these on/off and configure them)
- csi
- vchiq (aka vc04/vcos, uses bcm-mbox, bcm-bell, requires a major rewrite without breaking the ABI)
- vc-mem (this will need to use sysfs not /proc)