From: Kuninori Morimoto Date: Tue, 29 May 2012 06:31:39 +0000 (-0700) Subject: usb: renesas_usbhs: add DMAEngine ID specification note X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=d3c568c302ed0e3b2d51f0335f304ca4d85de54b;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.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: Felipe Balbi --- 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;