From d3c568c302ed0e3b2d51f0335f304ca4d85de54b Mon Sep 17 00:00:00 2001 From: Kuninori Morimoto Date: Mon, 28 May 2012 23:31:39 -0700 Subject: [PATCH] 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: Felipe Balbi --- include/linux/usb/renesas_usbhs.h | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/include/linux/usb/renesas_usbhs.h b/include/linux/usb/renesas_usbhs.h index 547e59cc00e..c5d36c65c33 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;