linux-kernel - [PATCH 5/9] usb: xhci-mtk: remove dummy wakeup debounce clocks

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Date:   Wed, 27 Sep 2017 17:23:01 +0800
From:   Chunfeng Yun <chunfeng.yun@...iatek.com>
To:     Mathias Nyman <mathias.nyman@...el.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Felipe Balbi <felipe.balbi@...ux.intel.com>,
        Rob Herring <robh+dt@...nel.org>
CC:     Matthias Brugger <matthias.bgg@...il.com>,
        Mark Rutland <mark.rutland@....com>,
        Ian Campbell <ijc+devicetree@...lion.org.uk>,
        Chunfeng Yun <chunfeng.yun@...iatek.com>,
        <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-usb@...r.kernel.org>, <linux-mediatek@...ts.infradead.org>,
        <devicetree@...r.kernel.org>
Subject: [PATCH 5/9] usb: xhci-mtk: remove dummy wakeup debounce clocks

The wakeup debounce clocks for each ports in fact are not
needed, so remove them.

Signed-off-by: Chunfeng Yun <chunfeng.yun@...iatek.com>
---
 drivers/usb/host/xhci-mtk.c |   33 ---------------------------------
 drivers/usb/host/xhci-mtk.h |    2 --
 2 files changed, 35 deletions(-)

diff --git a/drivers/usb/host/xhci-mtk.c b/drivers/usb/host/xhci-mtk.c
index 97ba51e..d60463c 100644
--- a/drivers/usb/host/xhci-mtk.c
+++ b/drivers/usb/host/xhci-mtk.c
@@ -237,25 +237,8 @@ static int xhci_mtk_clks_enable(struct xhci_hcd_mtk *mtk)
 		goto sys_clk_err;
 	}
 
-	if (mtk->wakeup_src) {
-		ret = clk_prepare_enable(mtk->wk_deb_p0);
-		if (ret) {
-			dev_err(mtk->dev, "failed to enable wk_deb_p0\n");
-			goto usb_p0_err;
-		}
-
-		ret = clk_prepare_enable(mtk->wk_deb_p1);
-		if (ret) {
-			dev_err(mtk->dev, "failed to enable wk_deb_p1\n");
-			goto usb_p1_err;
-		}
-	}
 	return 0;
 
-usb_p1_err:
-	clk_disable_unprepare(mtk->wk_deb_p0);
-usb_p0_err:
-	clk_disable_unprepare(mtk->sys_clk);
 sys_clk_err:
 	clk_disable_unprepare(mtk->ref_clk);
 ref_clk_err:
@@ -264,10 +247,6 @@ static int xhci_mtk_clks_enable(struct xhci_hcd_mtk *mtk)
 
 static void xhci_mtk_clks_disable(struct xhci_hcd_mtk *mtk)
 {
-	if (mtk->wakeup_src) {
-		clk_disable_unprepare(mtk->wk_deb_p1);
-		clk_disable_unprepare(mtk->wk_deb_p0);
-	}
 	clk_disable_unprepare(mtk->sys_clk);
 	clk_disable_unprepare(mtk->ref_clk);
 }
@@ -371,18 +350,6 @@ static int usb_wakeup_of_property_parse(struct xhci_hcd_mtk *mtk,
 	if (!mtk->wakeup_src)
 		return 0;
 
-	mtk->wk_deb_p0 = devm_clk_get(dev, "wakeup_deb_p0");
-	if (IS_ERR(mtk->wk_deb_p0)) {
-		dev_err(dev, "fail to get wakeup_deb_p0\n");
-		return PTR_ERR(mtk->wk_deb_p0);
-	}
-
-	mtk->wk_deb_p1 = devm_clk_get(dev, "wakeup_deb_p1");
-	if (IS_ERR(mtk->wk_deb_p1)) {
-		dev_err(dev, "fail to get wakeup_deb_p1\n");
-		return PTR_ERR(mtk->wk_deb_p1);
-	}
-
 	mtk->pericfg = syscon_regmap_lookup_by_phandle(dn,
 						"mediatek,syscon-wakeup");
 	if (IS_ERR(mtk->pericfg)) {
diff --git a/drivers/usb/host/xhci-mtk.h b/drivers/usb/host/xhci-mtk.h
index db55a12..67783a7 100644
--- a/drivers/usb/host/xhci-mtk.h
+++ b/drivers/usb/host/xhci-mtk.h
@@ -126,8 +126,6 @@ struct xhci_hcd_mtk {
 	struct regulator *vbus;
 	struct clk *sys_clk;	/* sys and mac clock */
 	struct clk *ref_clk;
-	struct clk *wk_deb_p0;	/* port0's wakeup debounce clock */
-	struct clk *wk_deb_p1;
 	struct regmap *pericfg;
 	struct phy **phys;
 	int num_phys;
-- 
1.7.9.5