linux-kernel - [PATCH 1/2] usb: dwc2: Move polling function to core.c.

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Date:   Thu, 27 Apr 2017 17:02:55 +0400
From:   Sevak Arakelyan <SEVAK.ARAKELYAN@...opsys.com>
To:     John Youn <John.Youn@...opsys.com>,
        Felipe Balbi <balbi@...nel.org>,
        "Greg Kroah-Hartman" <gregkh@...uxfoundation.org>,
        <linux-usb@...r.kernel.org>, <linux-kernel@...r.kernel.org>
CC:     Sevak Arakelyan <SEVAK.ARAKELYAN@...opsys.com>
Subject: [PATCH 1/2] usb: dwc2: Move polling function to core.c.

Move polling function to core.c so it can be used
anywhere in the code.

Signed-off-by: Sevak Arakelyan <sevaka@...opsys.com>
---
 drivers/usb/dwc2/core.c   | 23 +++++++++++++++++++++++
 drivers/usb/dwc2/core.h   |  4 ++++
 drivers/usb/dwc2/gadget.c | 14 --------------
 3 files changed, 27 insertions(+), 14 deletions(-)

diff --git a/drivers/usb/dwc2/core.c b/drivers/usb/dwc2/core.c
index 42ac47f85bb4..96d0b2b202e3 100644
--- a/drivers/usb/dwc2/core.c
+++ b/drivers/usb/dwc2/core.c
@@ -791,6 +791,29 @@ bool dwc2_hw_is_device(struct dwc2_hsotg *hsotg)
 		(op_mode == GHWCFG2_OP_MODE_NO_SRP_CAPABLE_DEVICE);
 }
 
+/**
+ * dwc2_hsotg_wait_bit_set - Waits for bit to be set.
+ * @hsotg: Programming view of DWC_otg controller.
+ * @offset: Register's offset where bit/bits must be set.
+ * @mask: Mask of the bit/bits which must be set.
+ * @timeout: Timeout to wait.
+ *
+ * Return: 0 if bit/bits are set or -ETIMEDOUT in case of timeout.
+ */
+int dwc2_hsotg_wait_bit_set(struct dwc2_hsotg *hsotg, u32 offset, u32 mask,
+			    u32 timeout)
+{
+	u32 i;
+
+	for (i = 0; i < timeout; i++) {
+		if (dwc2_readl(hsotg->regs + offset) & mask)
+			return 0;
+		udelay(1);
+	}
+
+	return -ETIMEDOUT;
+}
+
 MODULE_DESCRIPTION("DESIGNWARE HS OTG Core");
 MODULE_AUTHOR("Synopsys, Inc.");
 MODULE_LICENSE("Dual BSD/GPL");
diff --git a/drivers/usb/dwc2/core.h b/drivers/usb/dwc2/core.h
index 67ca7575a940..670a6c5fbed5 100644
--- a/drivers/usb/dwc2/core.h
+++ b/drivers/usb/dwc2/core.h
@@ -1124,6 +1124,10 @@ extern const struct of_device_id dwc2_of_match_table[];
 int dwc2_lowlevel_hw_enable(struct dwc2_hsotg *hsotg);
 int dwc2_lowlevel_hw_disable(struct dwc2_hsotg *hsotg);
 
+/* Common polling function */
+int dwc2_hsotg_wait_bit_set(struct dwc2_hsotg *hs_otg, u32 reg, u32 bit,
+			    u32 timeout);
+
 /* Parameters */
 int dwc2_get_hwparams(struct dwc2_hsotg *hsotg);
 int dwc2_init_params(struct dwc2_hsotg *hsotg);
diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c
index 98a4a79e7f6e..05244f2b9955 100644
--- a/drivers/usb/dwc2/gadget.c
+++ b/drivers/usb/dwc2/gadget.c
@@ -3694,20 +3694,6 @@ static irqreturn_t dwc2_hsotg_irq(int irq, void *pw)
 	return IRQ_HANDLED;
 }
 
-static int dwc2_hsotg_wait_bit_set(struct dwc2_hsotg *hs_otg, u32 reg,
-				   u32 bit, u32 timeout)
-{
-	u32 i;
-
-	for (i = 0; i < timeout; i++) {
-		if (dwc2_readl(hs_otg->regs + reg) & bit)
-			return 0;
-		udelay(1);
-	}
-
-	return -ETIMEDOUT;
-}
-
 static void dwc2_hsotg_ep_stop_xfr(struct dwc2_hsotg *hsotg,
 				   struct dwc2_hsotg_ep *hs_ep)
 {
-- 
2.11.0