lkml.org 
[lkml]   [2015]   [Jun]   [29]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Subject[PATCH v2 0/4] Add Mediatek SPI bus driver
Date
Mediatek SPI BUS controller has 3 hardware restrictions:
1. Hw has the restriction that in one transfer, length must be a multiple of
1024, when it's greater than 1024bytes.
2. Hw tx/rx have 4bytes aligned restriction.
3. For MT8173 IC: RX must enable TX, then TX transfer dummy data; TX don't need
to enable RX.
Some workarounds are done in SPI driver code base on v4.1-rc1.

Change in v2:
1. Remove spi bitbang framwork, use can_dma() and transfer_one().
2. Add PM functions.
3. Fix Mark Brown review comment.

Leilk Liu (4):
spi: support spi without dma channel to use can_dma()
dt-bindings: ARM: Mediatek: Document devicetree bindings for spi bus
spi: mediatek: Add spi bus for Mediatek MT8173
arm64: dts: Add spi bus dts

.../devicetree/bindings/spi/spi-mt65xx.txt | 32 +
arch/arm64/boot/dts/mediatek/mt8173.dtsi | 9 +
drivers/spi/Kconfig | 9 +
drivers/spi/Makefile | 1 +
drivers/spi/spi-mt65xx.c | 656 +++++++++++++++++++++
drivers/spi/spi.c | 22 +-
6 files changed, 725 insertions(+), 4 deletions(-)
create mode 100644 Documentation/devicetree/bindings/spi/spi-mt65xx.txt
create mode 100644 drivers/spi/spi-mt65xx.c

--
1.8.1.1.dirty



\
 
 \ /
  Last update: 2015-06-29 15:21    [W:0.129 / U:0.384 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site