Use readl_poll_timeout_atomic() to simplify code Cc: Mathias Nyman <mathias.nyman@xxxxxxxxxxxxxxx> Cc: Yoshihiro Shimoda <yoshihiro.shimoda.uh@xxxxxxxxxxx> Signed-off-by: Chunfeng Yun <chunfeng.yun@xxxxxxxxxxxx> --- drivers/usb/host/xhci-rcar.c | 43 ++++++++++++------------------------------- 1 file changed, 12 insertions(+), 31 deletions(-) diff --git a/drivers/usb/host/xhci-rcar.c b/drivers/usb/host/xhci-rcar.c index c1025d3..74f836f 100644 --- a/drivers/usb/host/xhci-rcar.c +++ b/drivers/usb/host/xhci-rcar.c @@ -6,6 +6,7 @@ */ #include <linux/firmware.h> +#include <linux/iopoll.h> #include <linux/module.h> #include <linux/platform_device.h> #include <linux/of.h> @@ -127,8 +128,7 @@ static int xhci_rcar_download_firmware(struct usb_hcd *hcd) void __iomem *regs = hcd->regs; struct xhci_plat_priv *priv = hcd_to_xhci_priv(hcd); const struct firmware *fw; - int retval, index, j, time; - int timeout = 10000; + int retval, index, j; u32 data, val, temp; u32 quirks = 0; const struct soc_device_attribute *attr; @@ -166,32 +166,19 @@ static int xhci_rcar_download_firmware(struct usb_hcd *hcd) temp |= RCAR_USB3_DL_CTRL_FW_SET_DATA0; writel(temp, regs + RCAR_USB3_DL_CTRL); - for (time = 0; time < timeout; time++) { - val = readl(regs + RCAR_USB3_DL_CTRL); - if ((val & RCAR_USB3_DL_CTRL_FW_SET_DATA0) == 0) - break; - udelay(1); - } - if (time == timeout) { - retval = -ETIMEDOUT; + retval = readl_poll_timeout_atomic(regs + RCAR_USB3_DL_CTRL, + val, !(val & RCAR_USB3_DL_CTRL_FW_SET_DATA0), + 1, 10000); + if (retval < 0) break; - } } temp = readl(regs + RCAR_USB3_DL_CTRL); temp &= ~RCAR_USB3_DL_CTRL_ENABLE; writel(temp, regs + RCAR_USB3_DL_CTRL); - for (time = 0; time < timeout; time++) { - val = readl(regs + RCAR_USB3_DL_CTRL); - if (val & RCAR_USB3_DL_CTRL_FW_SUCCESS) { - retval = 0; - break; - } - udelay(1); - } - if (time == timeout) - retval = -ETIMEDOUT; + retval = readl_poll_timeout_atomic((regs + RCAR_USB3_DL_CTRL), + val, (val & RCAR_USB3_DL_CTRL_FW_SUCCESS), 1, 10000); release_firmware(fw); @@ -200,18 +187,12 @@ static int xhci_rcar_download_firmware(struct usb_hcd *hcd) static bool xhci_rcar_wait_for_pll_active(struct usb_hcd *hcd) { - int timeout = 1000; + int retval; u32 val, mask = RCAR_USB3_AXH_STA_PLL_ACTIVE_MASK; - while (timeout > 0) { - val = readl(hcd->regs + RCAR_USB3_AXH_STA); - if ((val & mask) == mask) - return true; - udelay(1); - timeout--; - } - - return false; + retval = readl_poll_timeout_atomic(hcd->regs + RCAR_USB3_AXH_STA, + val, ((val & mask) == mask), 1, 1000); + return !!retval; } /* This function needs to initialize a "phy" of usb before */ -- 1.9.1