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authorChunfeng Yun <chunfeng.yun@mediatek.com>2019-08-23 09:40:25 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2019-08-28 23:50:25 +0300
commitb2fcb285ade36c2339ee6638223a65829ee9907f (patch)
treeacb0036b6c0899626e3b0cc7aefb5a303ea72cbd /drivers/usb/host/xhci-mtk.c
parente74e8bbff6e3654db55a56d3000ef581a6166944 (diff)
downloadlinux-b2fcb285ade36c2339ee6638223a65829ee9907f.tar.xz
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>
Diffstat (limited to 'drivers/usb/host/xhci-mtk.c')
-rw-r--r--drivers/usb/host/xhci-mtk.c13
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/usb/host/xhci-mtk.c b/drivers/usb/host/xhci-mtk.c
index 026fe18972d3..b18a6baef204 100644
--- a/drivers/usb/host/xhci-mtk.c
+++ b/drivers/usb/host/xhci-mtk.c
@@ -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);
}