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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: Chunfeng Yun <chunfeng.yun@mediatek.com>
Acked-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com>
Link: https://lore.kernel.org/r/1566542425-20082-2-git-send-email-chunfeng.yun@mediatek.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Chunfeng Yun 2019-08-23 14:40:25 +08:00 committed by Greg Kroah-Hartman
parent e74e8bbff6
commit b2fcb285ad
2 changed files with 14 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
drivers/usb/host/xhci-mtk.c
View File

@ -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);
}

1
drivers/usb/host/xhci-mtk.h
View File

@ -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;