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| author | Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> | 2012-05-28 23:31:39 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-06-13 12:38:36 -0700 |
| commit | 4527715979a34601b783f5f12774586c679c2a89 (patch) | |
| tree | 554b0370d99e69d030442863e247de8882f14219 /include/linux/usb/renesas_usbhs.h | |
| parent | cfaf025112d3856637ff34a767ef785ef5cf2ca9 (diff) | |
| download | talos-obmc-linux-4527715979a34601b783f5f12774586c679c2a89.tar.gz talos-obmc-linux-4527715979a34601b783f5f12774586c679c2a89.zip | |
usb: renesas_usbhs: add DMAEngine ID specification note
renesas_usbhs DMAEngine uses D0FIFO/D1FIFO,
but the data transfer direction should be fixed for keeping consistency.
This patch explain about it on renesas_usbhs.h
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux/usb/renesas_usbhs.h')
| -rw-r--r-- | include/linux/usb/renesas_usbhs.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/include/linux/usb/renesas_usbhs.h b/include/linux/usb/renesas_usbhs.h index 547e59cc00ea..c5d36c65c33b 100644 --- a/include/linux/usb/renesas_usbhs.h +++ b/include/linux/usb/renesas_usbhs.h @@ -132,6 +132,14 @@ struct renesas_usbhs_driver_param { * option: * * dma id for dmaengine + * The data transfer direction on D0FIFO/D1FIFO should be + * fixed for keeping consistency. + * So, the platform id settings will be.. + * .d0_tx_id = xx_TX, + * .d1_rx_id = xx_RX, + * or + * .d1_tx_id = xx_TX, + * .d0_rx_id = xx_RX, */ int d0_tx_id; int d0_rx_id; |
