linux-kernel - [PATCH v2 1/4] usb: dwc3: set dma_mask for dwc3

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Date:	Thu, 7 Mar 2013 18:51:43 +0530
From:	Kishon Vijay Abraham I <kishon@...com>
To:	<grant.likely@...retlab.ca>, <rob.herring@...xeda.com>,
	<rob@...dley.net>, <balbi@...com>, <gregkh@...uxfoundation.org>,
	<kishon@...com>, <s-guiriec@...com>, <gg@...mlogic.co.uk>,
	<sameo@...ux.intel.com>, <broonie@...nsource.wolfsonmicro.com>,
	<ldewangan@...dia.com>, <devicetree-discuss@...ts.ozlabs.org>,
	<linux-doc@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<linux-usb@...r.kernel.org>, <linux-omap@...r.kernel.org>,
	<ruchika@...com>
Subject: [PATCH v2 1/4] usb: dwc3: set dma_mask for dwc3_omap device

*dma_mask* is not set for devices created from dt data. So filled dma_mask
for dwc3_omap device here. And dwc3 core will copy the dma_mask from its
parent.

Signed-off-by: Kishon Vijay Abraham I <kishon@...com>
---
 drivers/usb/dwc3/core.c      |    4 ++++
 drivers/usb/dwc3/dwc3-omap.c |    3 +++
 2 files changed, 7 insertions(+)

diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index 66c0572..c845e70 100644
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -454,6 +454,10 @@ static int dwc3_probe(struct platform_device *pdev)
 	dwc->regs_size	= resource_size(res);
 	dwc->dev	= dev;
 
+	dev->dma_mask	= dev->parent->dma_mask;
+	dev->dma_parms	= dev->parent->dma_parms;
+	dma_set_coherent_mask(dev, dev->parent->coherent_dma_mask);
+
 	if (!strncmp("super", maximum_speed, 5))
 		dwc->maximum_speed = DWC3_DCFG_SUPERSPEED;
 	else if (!strncmp("high", maximum_speed, 4))
diff --git a/drivers/usb/dwc3/dwc3-omap.c b/drivers/usb/dwc3/dwc3-omap.c
index 35b9673..546f1fd 100644
--- a/drivers/usb/dwc3/dwc3-omap.c
+++ b/drivers/usb/dwc3/dwc3-omap.c
@@ -277,6 +277,8 @@ static void dwc3_omap_disable_irqs(struct dwc3_omap *omap)
 	dwc3_omap_writel(omap->base, USBOTGSS_IRQENABLE_SET_0, 0x00);
 }
 
+static u64 dwc3_omap_dma_mask = DMA_BIT_MASK(32);
+
 static int dwc3_omap_probe(struct platform_device *pdev)
 {
 	struct device_node	*node = pdev->dev.of_node;
@@ -330,6 +332,7 @@ static int dwc3_omap_probe(struct platform_device *pdev)
 	omap->dev	= dev;
 	omap->irq	= irq;
 	omap->base	= base;
+	dev->dma_mask	= &dwc3_omap_dma_mask;
 
 	/*
 	 * REVISIT if we ever have two instances of the wrapper, we will be
-- 
1.7.10.4

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