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Commit 45277159 authored by Kuninori Morimoto's avatar Kuninori Morimoto Committed by Greg Kroah-Hartman
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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: default avatarKuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent cfaf0251

include/linux/usb/renesas_usbhs.h

+8 −0
Original line number Diff line number Diff line
@@ -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;