Hi,
On Tue, Oct 16, 2012 at 3:38 PM, Felipe Balbi <balbi@xxxxxx> wrote:
> Hi,
>
> On Tue, Oct 16, 2012 at 03:36:43PM +0530, kishon wrote:
>> Hi,
>>
>> On Tuesday 16 October 2012 03:23 PM, Felipe Balbi wrote:
>> >On Tue, Oct 16, 2012 at 02:15:56PM +0530, Vivek Gautam wrote:
>> >>This patch adds support to parse probe data for
>> >>dwc3-exynos driver using device tree.
>> >>
>> >>Signed-off-by: Vivek Gautam <gautam.vivek@xxxxxxxxxxx>
>> >>---
>> >> drivers/usb/dwc3/dwc3-exynos.c | 20 ++++++++++++++++++++
>> >> 1 files changed, 20 insertions(+), 0 deletions(-)
>> >>
>> >>diff --git a/drivers/usb/dwc3/dwc3-exynos.c b/drivers/usb/dwc3/dwc3-exynos.c
>> >>index ca65978..d11ef49 100644
>> >>--- a/drivers/usb/dwc3/dwc3-exynos.c
>> >>+++ b/drivers/usb/dwc3/dwc3-exynos.c
>> >>@@ -21,6 +21,7 @@
>> >> #include <linux/clk.h>
>> >> #include <linux/usb/otg.h>
>> >> #include <linux/usb/nop-usb-xceiv.h>
>> >>+#include <linux/of.h>
>> >>
>> >> #include "core.h"
>> >>
>> >>@@ -87,6 +88,8 @@ err1:
>> >> return ret;
>> >> }
>> >>
>> >>+static u64 dwc3_exynos_dma_mask = DMA_BIT_MASK(32);
>> >>+
>> >> static int __devinit dwc3_exynos_probe(struct platform_device *pdev)
>> >> {
>> >> struct dwc3_exynos_data *pdata = pdev->dev.platform_data;
>> >>@@ -103,6 +106,14 @@ static int __devinit dwc3_exynos_probe(struct platform_device *pdev)
>> >> goto err0;
>> >> }
>> >>
>> >>+ /*
>> >>+ * Right now device-tree probed devices don't get dma_mask set.
>> >>+ * Since shared usb code relies on it, set it here for now.
>> >>+ * Once we move to full device tree support this will vanish off.
>> >>+ */
>> >>+ if (!pdev->dev.dma_mask)
>> >>+ pdev->dev.dma_mask = &dwc3_exynos_dma_mask;
>> >
>> >says who ?
>> >
>> >$ git grep -e dma_mask drivers/of/
>> >drivers/of/platform.c: dev->dev.dma_mask = &dev->archdata.dma_mask;
>> >drivers/of/platform.c: dev->archdata.dma_mask = 0xffffffffUL;
>> >drivers/of/platform.c: dev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
>> >drivers/of/platform.c: dev->dev.coherent_dma_mask = ~0;
>> >drivers/of/platform.c: dev->dma_mask = ~0;
>> >
>> >-ECONFUSED
>>
>> dma_mask is set under some ifdef except for "dev->dma_mask = ~0;".
>> However I agree with you for coherent_dma_mask case.
>
> indeed. Should we try to patch that instead ?
>
> Rob, should we set dma_mask at the driver or do you have a nicer way to
> handle it ??
>
Can i have suggestions here please ? :)
> --
> balbi
>
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>
Thanks & Regards
Vivek
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