From: b32955@freescale.com (Huang Shijie)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 0/3] serial: mxs-auart: add DMA support for auart in mx28
Date: Tue, 16 Oct 2012 14:03:03 +0800 [thread overview]
Message-ID: <1350367386-7742-1-git-send-email-b32955@freescale.com> (raw)
This patch set adds the DMA support for auart in mx28.
patch 1:
But in mx23, the DMA has a bug(see errata:2836). We can not add the
DMA support in mx23, but we can add DMA support to auart in mx28.
So in order to add the DMA support for the auart in mx28, we should add
the platform_device_id to distinguish the distinguish SOCs.
patch 2: add the DMA support for mx28
Only we meet the following conditions, we can enable the DMA support
for auart:
(1) We enable the DMA support in the dts file, such as
arch/arm/boot/dts/imx28.dtsi.
(2) We enable the hardware flow control.
(3) We use the mx28, not the mx23. Due to hardware bug(see errata: 2836),
we can not add the DMA support to mx23.
patch 3: enable the DMA support in dts for mx28
You can use the /ttyAPP0 to test this patch set.
I tested this patch in mx28-evk board.
Huang Shijie (3):
serial: mxs-auart: distinguish the different SOCs
serial: mxs-auart: add the DMA support for mx28
ARM: dts: enable dma support for auart0 in mx28
.../bindings/tty/serial/fsl-mxs-auart.txt | 9 +-
arch/arm/boot/dts/imx28.dtsi | 12 +-
drivers/tty/serial/mxs-auart.c | 335 +++++++++++++++++++-
3 files changed, 341 insertions(+), 15 deletions(-)
next reply other threads:[~2012-10-16 6:03 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-10-16 6:03 Huang Shijie [this message]
2012-10-16 6:03 ` [PATCH 1/3] serial: mxs-auart: distinguish the different SOCs Huang Shijie
2012-10-18 2:44 ` Shawn Guo
2012-10-16 6:03 ` [PATCH 2/3] serial: mxs-auart: add the DMA support for mx28 Huang Shijie
2012-10-18 3:20 ` Shawn Guo
2012-10-18 6:22 ` Huang Shijie
2012-10-16 6:03 ` [PATCH 3/3] ARM: dts: enable dma support for auart0 in mx28 Huang Shijie
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