diff options
| author | Gregory Herrero <gregory.herrero@intel.com> | 2015-01-09 15:38:48 +0300 |
|---|---|---|
| committer | Felipe Balbi <balbi@ti.com> | 2015-01-13 00:33:04 +0300 |
| commit | edd74be83047f439e9507cedbbbef0891f3a9a48 (patch) | |
| tree | 7a2dbe0342da88e7e7a42fc4a92c2cda0d109dea /drivers/usb/dwc2 | |
| parent | f5090044763fd954a002a6ef466fcbc21033518f (diff) | |
| download | linux-edd74be83047f439e9507cedbbbef0891f3a9a48.tar.xz | |
usb: dwc2: gadget: add device tree property to enable dma
* Add an of specific function to parse device node properties.
* Enable dma usage only if device tree property 'g_use_dma' is present.
Tested-by: Robert Baldyga <r.baldyga@samsung.com>
Acked-by: Paul Zimmerman <paulz@synopsys.com>
Signed-off-by: Gregory Herrero <gregory.herrero@intel.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Diffstat (limited to 'drivers/usb/dwc2')
| -rw-r--r-- | drivers/usb/dwc2/core.h | 2 | ||||
| -rw-r--r-- | drivers/usb/dwc2/gadget.c | 18 |
2 files changed, 18 insertions, 2 deletions
diff --git a/drivers/usb/dwc2/core.h b/drivers/usb/dwc2/core.h index 7db83d058da3..376a008ef437 100644 --- a/drivers/usb/dwc2/core.h +++ b/drivers/usb/dwc2/core.h @@ -563,6 +563,7 @@ struct dwc2_hw_params { * @setup: NAK management for EP0 SETUP * @last_rst: Time of last reset * @eps: The endpoints being supplied to the gadget framework + * @g_using_dma: Indicate if dma usage is enabled */ struct dwc2_hsotg { struct device *dev; @@ -696,6 +697,7 @@ struct dwc2_hsotg { unsigned int setup:1; unsigned long last_rst; struct s3c_hsotg_ep *eps; + u32 g_using_dma; #endif /* CONFIG_USB_DWC2_PERIPHERAL || CONFIG_USB_DWC2_DUAL_ROLE */ }; diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c index b98622f2092d..c24cb3bef06a 100644 --- a/drivers/usb/dwc2/gadget.c +++ b/drivers/usb/dwc2/gadget.c @@ -85,11 +85,11 @@ static void s3c_hsotg_dump(struct dwc2_hsotg *hsotg); * a core reset. This means we either need to fix the gadgets to take * account of DMA alignment, or add bounce buffers (yuerk). * - * Until this issue is sorted out, we always return 'false'. + * g_using_dma is set depending on dts flag. */ static inline bool using_dma(struct dwc2_hsotg *hsotg) { - return false; /* support is not complete */ + return hsotg->g_using_dma; } /** @@ -3402,6 +3402,18 @@ static void s3c_hsotg_delete_debug(struct dwc2_hsotg *hsotg) debugfs_remove(hsotg->debug_root); } +#ifdef CONFIG_OF +static void s3c_hsotg_of_probe(struct dwc2_hsotg *hsotg) +{ + struct device_node *np = hsotg->dev->of_node; + + /* Enable dma if requested in device tree */ + hsotg->g_using_dma = of_property_read_bool(np, "g-use-dma"); +} +#else +static inline void s3c_hsotg_of_probe(struct dwc2_hsotg *hsotg) { } +#endif + /** * dwc2_gadget_init - init function for gadget * @dwc2: The data structure for the DWC2 driver. @@ -3419,6 +3431,8 @@ int dwc2_gadget_init(struct dwc2_hsotg *hsotg, int irq) /* Set default UTMI width */ hsotg->phyif = GUSBCFG_PHYIF16; + s3c_hsotg_of_probe(hsotg); + /* * If platform probe couldn't find a generic PHY or an old style * USB PHY, fall back to pdata |