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usb: dwc2: gadget: don't erase gahbcfg register when enabling dma

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Do a read-modify-write instead of only setting DMAEn bit.

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>
This commit is contained in:
Gregory Herrero 2015-01-09 13:38:47 +01:00 committed by Felipe Balbi
parent 5f05048e54
commit f509004476
1 changed files with 2 additions and 2 deletions
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4
drivers/usb/dwc2/gadget.c
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@ -2827,8 +2827,8 @@ static void s3c_hsotg_init(struct dwc2_hsotg *hsotg)
writel(GUSBCFG_PHYIF16 | GUSBCFG_TOUTCAL(7) | (0x5 << 10),
hsotg->regs + GUSBCFG);
writel(using_dma(hsotg) ? GAHBCFG_DMA_EN : 0x0,
hsotg->regs + GAHBCFG);
if (using_dma(hsotg))
__orr32(hsotg->regs + GAHBCFG, GAHBCFG_DMA_EN);
}
/**