From: Chunfeng Yun <chunfeng.yun@mediatek.com>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Mathias Nyman <mathias.nyman@intel.com>,
Matthias Brugger <matthias.bgg@gmail.com>,
Chunfeng Yun <chunfeng.yun@mediatek.com>,
Marek Szyprowski <m.szyprowski@samsung.com>,
<linux-usb@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
<linux-arm-kernel@lists.infradead.org>,
<linux-mediatek@lists.infradead.org>,
Dongjin Kim <tobetter@gmail.com>
Subject: [v2 PATCH 3/6] usb: misc: usb3503: get optional clock by devm_clk_get_optional()
Date: Wed, 10 Apr 2019 14:47:26 +0800 [thread overview]
Message-ID: <e24a625adb68a0975636d6d59424c9986657a18d.1554877692.git.chunfeng.yun@mediatek.com> (raw)
In-Reply-To: <bc6cdc2dce698dddbd692ba100fbf08c15c7b023.1554877692.git.chunfeng.yun@mediatek.com>
Use devm_clk_get_optional() to get optional clock
Cc: Dongjin Kim <tobetter@gmail.com>
Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
---
v2: no changes
---
drivers/usb/misc/usb3503.c | 48 ++++++++++++++------------------------
1 file changed, 18 insertions(+), 30 deletions(-)
diff --git a/drivers/usb/misc/usb3503.c b/drivers/usb/misc/usb3503.c
index d5141aa79dd4..72f39a9751b5 100644
--- a/drivers/usb/misc/usb3503.c
+++ b/drivers/usb/misc/usb3503.c
@@ -172,7 +172,6 @@ static int usb3503_probe(struct usb3503 *hub)
hub->gpio_reset = pdata->gpio_reset;
hub->mode = pdata->initial_mode;
} else if (np) {
- struct clk *clk;
u32 rate = 0;
hub->port_off_mask = 0;
@@ -198,34 +197,29 @@ static int usb3503_probe(struct usb3503 *hub)
}
}
- clk = devm_clk_get(dev, "refclk");
- if (IS_ERR(clk) && PTR_ERR(clk) != -ENOENT) {
+ hub->clk = devm_clk_get_optional(dev, "refclk");
+ if (IS_ERR(hub->clk)) {
dev_err(dev, "unable to request refclk (%ld)\n",
- PTR_ERR(clk));
- return PTR_ERR(clk);
+ PTR_ERR(hub->clk));
+ return PTR_ERR(hub->clk);
}
- if (!IS_ERR(clk)) {
- hub->clk = clk;
-
- if (rate != 0) {
- err = clk_set_rate(hub->clk, rate);
- if (err) {
- dev_err(dev,
- "unable to set reference clock rate to %d\n",
- (int) rate);
- return err;
- }
- }
-
- err = clk_prepare_enable(hub->clk);
+ if (rate != 0) {
+ err = clk_set_rate(hub->clk, rate);
if (err) {
dev_err(dev,
- "unable to enable reference clock\n");
+ "unable to set reference clock rate to %d\n",
+ (int)rate);
return err;
}
}
+ err = clk_prepare_enable(hub->clk);
+ if (err) {
+ dev_err(dev, "unable to enable reference clock\n");
+ return err;
+ }
+
property = of_get_property(np, "disabled-ports", &len);
if (property && (len / sizeof(u32)) > 0) {
int i;
@@ -324,8 +318,7 @@ static int usb3503_i2c_remove(struct i2c_client *i2c)
struct usb3503 *hub;
hub = i2c_get_clientdata(i2c);
- if (hub->clk)
- clk_disable_unprepare(hub->clk);
+ clk_disable_unprepare(hub->clk);
return 0;
}
@@ -348,8 +341,7 @@ static int usb3503_platform_remove(struct platform_device *pdev)
struct usb3503 *hub;
hub = platform_get_drvdata(pdev);
- if (hub->clk)
- clk_disable_unprepare(hub->clk);
+ clk_disable_unprepare(hub->clk);
return 0;
}
@@ -358,18 +350,14 @@ static int usb3503_platform_remove(struct platform_device *pdev)
static int usb3503_suspend(struct usb3503 *hub)
{
usb3503_switch_mode(hub, USB3503_MODE_STANDBY);
-
- if (hub->clk)
- clk_disable_unprepare(hub->clk);
+ clk_disable_unprepare(hub->clk);
return 0;
}
static int usb3503_resume(struct usb3503 *hub)
{
- if (hub->clk)
- clk_prepare_enable(hub->clk);
-
+ clk_prepare_enable(hub->clk);
usb3503_switch_mode(hub, hub->mode);
return 0;
--
2.21.0
next prev parent reply other threads:[~2019-04-10 6:48 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-04-10 6:47 [v2 PATCH 1/6] usb: xhci-mtk: get optional clock by devm_clk_get_optional() Chunfeng Yun
2019-04-10 6:47 ` [v2 PATCH 2/6] usb: host: xhci-plat: " Chunfeng Yun
2019-04-10 6:47 ` Chunfeng Yun [this message]
2019-04-10 6:47 ` [v2 PATCH 4/6] usb: dwc2: " Chunfeng Yun
2019-04-10 6:47 ` [v2 PATCH 5/6] usb: chipidea: msm: " Chunfeng Yun
2019-04-10 6:47 ` [v2 PATCH 6/6] usb: mtu3: " Chunfeng Yun
2019-04-12 19:06 ` Matthias Brugger
2019-04-16 10:12 ` [v2 PATCH 1/6] usb: xhci-mtk: " Greg Kroah-Hartman
2019-04-17 5:53 ` Chunfeng Yun
2019-04-16 10:15 ` Greg Kroah-Hartman
2019-04-17 5:53 ` Chunfeng Yun
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