[PATCH v3 0/3] powerpc/512x: add LocalPlus Bus FIFO device driver

From: Alexander Popov
Date: Thu Sep 24 2015 - 13:27:58 EST

This driver for Freescale MPC512x LocalPlus Bus FIFO (called SCLPC
in the Reference Manual) allows Direct Memory Access transfers
between RAM and peripheral devices on LocalPlus Bus.

Changes in v3:
- resource usage in probe() is fixed;
- driver methods are made safe against remove();
- dma_request_slave_channel() is used to get DMA channel number from
the device tree;
- chip select number concerned with the DMA transaction is determined
from 'localbus' device tree node information;
- register set is described as a structure;
- symbolic names are given to shift counts to keep magic numbers
out of the code;
- choosing values for LPBFIFO BPT (bytes per transfer) and DMA maxburst
is improved, so DMA transfer size has increased for some cases;
- device tree binding for LPBFIFO is documented;
- Kconfig and Makefile are improved;
- email address "a13xp0p0v88@xxxxxxxxx" is changed to a more pleasant
alias "alex.popov@xxxxxxxxx";

Alexander Popov (3):
powerpc/512x: add LocalPlus Bus FIFO device driver
powerpc/512x: add a device tree binding for LocalPlus Bus FIFO
dmaengine: mpc512x: initialize with subsys_initcall()

.../bindings/powerpc/fsl/mpc512x_lpbfifo.txt | 21 +
arch/powerpc/boot/dts/mpc5121.dtsi | 11 +-
arch/powerpc/boot/dts/mpc5125twr.dts | 11 +-
arch/powerpc/configs/mpc512x_defconfig | 1 +
arch/powerpc/include/asm/mpc5121.h | 59 +++
arch/powerpc/platforms/512x/Kconfig | 6 +
arch/powerpc/platforms/512x/Makefile | 1 +
arch/powerpc/platforms/512x/mpc512x_lpbfifo.c | 560 +++++++++++++++++++++
drivers/dma/mpc512x_dma.c | 12 +-
9 files changed, 678 insertions(+), 4 deletions(-)
create mode 100644 Documentation/devicetree/bindings/powerpc/fsl/mpc512x_lpbfifo.txt
create mode 100644 arch/powerpc/platforms/512x/mpc512x_lpbfifo.c


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