From 08b9f9db707bae6c56c0b0b0232a1338ca58e3ce Mon Sep 17 00:00:00 2001 From: Matthijs Kooijman Date: Fri, 30 Aug 2013 18:45:19 +0200 Subject: [PATCH] staging: dwc2: remove redundant register reads For calculating FIFO offsets, the sizes of preceding fifos need to be known. For filling the GDFIFOCFG register, these fifo sizes were read from hardware registers. However, these values were written to these registers just a few lines before, so we can just use the values written instead. Signed-off-by: Matthijs Kooijman Acked-by: Paul Zimmerman Signed-off-by: Greg Kroah-Hartman --- drivers/staging/dwc2/core.c | 9 ++++----- 1 file changed, 4 insertions(+), 5 deletions(-) diff --git a/drivers/staging/dwc2/core.c b/drivers/staging/dwc2/core.c index 5799f478980c..f6494df799c9 100644 --- a/drivers/staging/dwc2/core.c +++ b/drivers/staging/dwc2/core.c @@ -507,7 +507,7 @@ void dwc2_disable_host_interrupts(struct dwc2_hsotg *hsotg) static void dwc2_config_fifos(struct dwc2_hsotg *hsotg) { struct dwc2_core_params *params = hsotg->core_params; - u32 rxfsiz, nptxfsiz, hptxfsiz, dfifocfg; + u32 nptxfsiz, hptxfsiz, dfifocfg; if (!params->enable_dynamic_fifo) return; @@ -555,11 +555,10 @@ static void dwc2_config_fifos(struct dwc2_hsotg *hsotg) * include RxFIFO, NPTXFIFO and HPTXFIFO */ dfifocfg = readl(hsotg->regs + GDFIFOCFG); - rxfsiz = readl(hsotg->regs + GRXFSIZ) & 0x0000ffff; - nptxfsiz = readl(hsotg->regs + GNPTXFSIZ) >> 16 & 0xffff; - hptxfsiz = readl(hsotg->regs + HPTXFSIZ) >> 16 & 0xffff; dfifocfg &= ~GDFIFOCFG_EPINFOBASE_MASK; - dfifocfg |= (rxfsiz + nptxfsiz + hptxfsiz) << + dfifocfg |= (params->host_rx_fifo_size + + params->host_nperio_tx_fifo_size + + params->host_perio_tx_fifo_size) << GDFIFOCFG_EPINFOBASE_SHIFT & GDFIFOCFG_EPINFOBASE_MASK; writel(dfifocfg, hsotg->regs + GDFIFOCFG); -- 2.34.1