Commit b2fcb285 authored by Chunfeng Yun's avatar Chunfeng Yun Committed by Greg Kroah-Hartman
Browse files

usb: xhci-mtk: add an optional xhci_ck clock 



Some SoCs may have an optional clock xhci_ck (125M or 200M), it
usually uses the same PLL as sys_ck, so support it.

Signed-off-by: default avatarChunfeng Yun <chunfeng.yun@mediatek.com>
Acked-by: default avatarMathias Nyman <mathias.nyman@linux.intel.com>
Reviewed-by: default avatarMatthias Brugger <matthias.bgg@gmail.com>
Link: https://lore.kernel.org/r/1566542425-20082-2-git-send-email-chunfeng.yun@mediatek.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent e74e8bbf

drivers/usb/host/xhci-mtk.c

+13 −0
Original line number Diff line number Diff line
@@ -216,6 +216,10 @@ static int xhci_mtk_clks_get(struct xhci_hcd_mtk *mtk) 
		return PTR_ERR(mtk->sys_clk);

	}



	mtk->xhci_clk = devm_clk_get_optional(dev, "xhci_ck");

	if (IS_ERR(mtk->xhci_clk))

		return PTR_ERR(mtk->xhci_clk);



	mtk->ref_clk = devm_clk_get_optional(dev, "ref_ck");

	if (IS_ERR(mtk->ref_clk))

		return PTR_ERR(mtk->ref_clk);
@@ -244,6 +248,12 @@ static int xhci_mtk_clks_enable(struct xhci_hcd_mtk *mtk) 
		goto sys_clk_err;

	}



	ret = clk_prepare_enable(mtk->xhci_clk);

	if (ret) {

		dev_err(mtk->dev, "failed to enable xhci_clk\n");

		goto xhci_clk_err;

	}



	ret = clk_prepare_enable(mtk->mcu_clk);

	if (ret) {

		dev_err(mtk->dev, "failed to enable mcu_clk\n");
@@ -261,6 +271,8 @@ static int xhci_mtk_clks_enable(struct xhci_hcd_mtk *mtk) 
dma_clk_err:

	clk_disable_unprepare(mtk->mcu_clk);

mcu_clk_err:

	clk_disable_unprepare(mtk->xhci_clk);

xhci_clk_err:

	clk_disable_unprepare(mtk->sys_clk);

sys_clk_err:

	clk_disable_unprepare(mtk->ref_clk);
@@ -272,6 +284,7 @@ static void xhci_mtk_clks_disable(struct xhci_hcd_mtk *mtk) 
{

	clk_disable_unprepare(mtk->dma_clk);

	clk_disable_unprepare(mtk->mcu_clk);

	clk_disable_unprepare(mtk->xhci_clk);

	clk_disable_unprepare(mtk->sys_clk);

	clk_disable_unprepare(mtk->ref_clk);

}

drivers/usb/host/xhci-mtk.h

+1 −0
Original line number Diff line number Diff line
@@ -139,6 +139,7 @@ struct xhci_hcd_mtk { 
	struct regulator *vusb33;

	struct regulator *vbus;

	struct clk *sys_clk;	/* sys and mac clock */

	struct clk *xhci_clk;

	struct clk *ref_clk;

	struct clk *mcu_clk;

	struct clk *dma_clk;

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