From: Kuninori Morimoto Date: Tue, 29 May 2012 06:31:39 +0000 (-0700) Subject: usb: renesas_usbhs: add DMAEngine ID specification note X-Git-Tag: upstream/snapshot3+hdmi~6973^2~24^2~68 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=4527715979a34601b783f5f12774586c679c2a89;p=platform%2Fadaptation%2Frenesas_rcar%2Frenesas_kernel.git 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 Signed-off-by: Greg Kroah-Hartman --- diff --git a/include/linux/usb/renesas_usbhs.h b/include/linux/usb/renesas_usbhs.h index 547e59c..c5d36c6 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;