diff options
| author |   Chunfeng Yun <chunfeng.yun@mediatek.com> | 2017-01-18 14:08:23 +0800 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-01-19 10:37:16 +0100 |
| commit | 4d70d0c6c1bf3f26358f7903535735fa557b1b54 (patch) | |
| tree | 96af7d3f74ed084cc45addfc9e542a4f81d15ee7 /drivers/usb/mtu3/mtu3_plat.c | |
| parent | usb: mtu3: get resources that cause deferred probe earlier (diff) | |
| download | linux-dev-4d70d0c6c1bf3f26358f7903535735fa557b1b54.tar.xz linux-dev-4d70d0c6c1bf3f26358f7903535735fa557b1b54.zip | |
usb: mtu3: add reference clock
usually, the reference clock comes from 26M oscillator directly,
but some SoCs are not, add it for compatibility.
Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/mtu3/mtu3_plat.c')
| -rw-r--r-- | drivers/usb/mtu3/mtu3_plat.c | 21 |
1 files changed, 19 insertions, 2 deletions
diff --git a/drivers/usb/mtu3/mtu3_plat.c b/drivers/usb/mtu3/mtu3_plat.c index 63448595c209..19a345d6687d 100644 --- a/drivers/usb/mtu3/mtu3_plat.c +++ b/drivers/usb/mtu3/mtu3_plat.c @@ -123,7 +123,13 @@ static int ssusb_rscs_init(struct ssusb_mtk *ssusb) ret = clk_prepare_enable(ssusb->sys_clk); if (ret) { dev_err(ssusb->dev, "failed to enable sys_clk\n"); - goto clk_err; + goto sys_clk_err; + } + + ret = clk_prepare_enable(ssusb->ref_clk); + if (ret) { + dev_err(ssusb->dev, "failed to enable ref_clk\n"); + goto ref_clk_err; } ret = ssusb_phy_init(ssusb); @@ -143,8 +149,10 @@ static int ssusb_rscs_init(struct ssusb_mtk *ssusb) phy_err: ssusb_phy_exit(ssusb); phy_init_err: + clk_disable_unprepare(ssusb->ref_clk); +ref_clk_err: clk_disable_unprepare(ssusb->sys_clk); -clk_err: +sys_clk_err: regulator_disable(ssusb->vusb33); vusb33_err: @@ -154,6 +162,7 @@ vusb33_err: static void ssusb_rscs_exit(struct ssusb_mtk *ssusb) { clk_disable_unprepare(ssusb->sys_clk); + clk_disable_unprepare(ssusb->ref_clk); regulator_disable(ssusb->vusb33); ssusb_phy_power_off(ssusb); ssusb_phy_exit(ssusb); @@ -216,6 +225,12 @@ static int get_ssusb_rscs(struct platform_device *pdev, struct ssusb_mtk *ssusb) return PTR_ERR(ssusb->sys_clk); } + ssusb->ref_clk = devm_clk_get(dev, "ref_ck"); + if (IS_ERR(ssusb->ref_clk)) { + dev_err(dev, "failed to get ref clock\n"); + return PTR_ERR(ssusb->ref_clk); + } + ssusb->num_phys = of_count_phandle_with_args(node, "phys", "#phy-cells"); if (ssusb->num_phys > 0) { @@ -428,6 +443,7 @@ static int __maybe_unused mtu3_suspend(struct device *dev) ssusb_host_disable(ssusb, true); ssusb_phy_power_off(ssusb); clk_disable_unprepare(ssusb->sys_clk); + clk_disable_unprepare(ssusb->ref_clk); ssusb_wakeup_enable(ssusb); return 0; @@ -445,6 +461,7 @@ static int __maybe_unused mtu3_resume(struct device *dev) ssusb_wakeup_disable(ssusb); clk_prepare_enable(ssusb->sys_clk); + clk_prepare_enable(ssusb->ref_clk); ssusb_phy_power_on(ssusb); ssusb_host_enable(ssusb); |