* [PATCH] rtc: mxc: Use devm_add_action_or_reset() for calls to clk_disable_unprepare()
@ 2020-03-16 9:09 Anson Huang
2020-03-22 21:11 ` Alexandre Belloni
0 siblings, 1 reply; 2+ messages in thread
From: Anson Huang @ 2020-03-16 9:09 UTC (permalink / raw)
To: a.zummo, alexandre.belloni, linux-rtc, linux-kernel; +Cc: Linux-imx
Use devm_add_action_or_reset() for calls to clk_disable_unprepare(),
which can simplify the error handling, and .remove callback can be dropped.
Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
---
drivers/rtc/rtc-mxc.c | 46 +++++++++++++++++++---------------------------
1 file changed, 19 insertions(+), 27 deletions(-)
diff --git a/drivers/rtc/rtc-mxc.c b/drivers/rtc/rtc-mxc.c
index 902d57d..a8cfbde 100644
--- a/drivers/rtc/rtc-mxc.c
+++ b/drivers/rtc/rtc-mxc.c
@@ -307,6 +307,14 @@ static const struct rtc_class_ops mxc_rtc_ops = {
.alarm_irq_enable = mxc_rtc_alarm_irq_enable,
};
+static void mxc_rtc_action(void *p)
+{
+ struct rtc_plat_data *pdata = p;
+
+ clk_disable_unprepare(pdata->clk_ref);
+ clk_disable_unprepare(pdata->clk_ipg);
+}
+
static int mxc_rtc_probe(struct platform_device *pdev)
{
struct rtc_device *rtc;
@@ -366,14 +374,20 @@ static int mxc_rtc_probe(struct platform_device *pdev)
pdata->clk_ref = devm_clk_get(&pdev->dev, "ref");
if (IS_ERR(pdata->clk_ref)) {
+ clk_disable_unprepare(pdata->clk_ipg);
dev_err(&pdev->dev, "unable to get ref clock!\n");
- ret = PTR_ERR(pdata->clk_ref);
- goto exit_put_clk_ipg;
+ return PTR_ERR(pdata->clk_ref);
}
ret = clk_prepare_enable(pdata->clk_ref);
+ if (ret) {
+ clk_disable_unprepare(pdata->clk_ipg);
+ return ret;
+ }
+
+ ret = devm_add_action_or_reset(&pdev->dev, mxc_rtc_action, pdata);
if (ret)
- goto exit_put_clk_ipg;
+ return ret;
rate = clk_get_rate(pdata->clk_ref);
@@ -385,16 +399,14 @@ static int mxc_rtc_probe(struct platform_device *pdev)
reg = RTC_INPUT_CLK_38400HZ;
else {
dev_err(&pdev->dev, "rtc clock is not valid (%lu)\n", rate);
- ret = -EINVAL;
- goto exit_put_clk_ref;
+ return -EINVAL;
}
reg |= RTC_ENABLE_BIT;
writew(reg, (pdata->ioaddr + RTC_RTCCTL));
if (((readw(pdata->ioaddr + RTC_RTCCTL)) & RTC_ENABLE_BIT) == 0) {
dev_err(&pdev->dev, "hardware module can't be enabled!\n");
- ret = -EIO;
- goto exit_put_clk_ref;
+ return -EIO;
}
platform_set_drvdata(pdev, pdata);
@@ -417,29 +429,10 @@ static int mxc_rtc_probe(struct platform_device *pdev)
}
ret = rtc_register_device(rtc);
- if (ret)
- goto exit_put_clk_ref;
-
- return 0;
-
-exit_put_clk_ref:
- clk_disable_unprepare(pdata->clk_ref);
-exit_put_clk_ipg:
- clk_disable_unprepare(pdata->clk_ipg);
return ret;
}
-static int mxc_rtc_remove(struct platform_device *pdev)
-{
- struct rtc_plat_data *pdata = platform_get_drvdata(pdev);
-
- clk_disable_unprepare(pdata->clk_ref);
- clk_disable_unprepare(pdata->clk_ipg);
-
- return 0;
-}
-
static struct platform_driver mxc_rtc_driver = {
.driver = {
.name = "mxc_rtc",
@@ -447,7 +440,6 @@ static struct platform_driver mxc_rtc_driver = {
},
.id_table = imx_rtc_devtype,
.probe = mxc_rtc_probe,
- .remove = mxc_rtc_remove,
};
module_platform_driver(mxc_rtc_driver)
--
2.7.4
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] rtc: mxc: Use devm_add_action_or_reset() for calls to clk_disable_unprepare()
2020-03-16 9:09 [PATCH] rtc: mxc: Use devm_add_action_or_reset() for calls to clk_disable_unprepare() Anson Huang
@ 2020-03-22 21:11 ` Alexandre Belloni
0 siblings, 0 replies; 2+ messages in thread
From: Alexandre Belloni @ 2020-03-22 21:11 UTC (permalink / raw)
To: Anson Huang; +Cc: a.zummo, linux-rtc, linux-kernel, Linux-imx
On 16/03/2020 17:09:45+0800, Anson Huang wrote:
> Use devm_add_action_or_reset() for calls to clk_disable_unprepare(),
> which can simplify the error handling, and .remove callback can be dropped.
>
> Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
> ---
> drivers/rtc/rtc-mxc.c | 46 +++++++++++++++++++---------------------------
> 1 file changed, 19 insertions(+), 27 deletions(-)
>
Applied, thanks.
--
Alexandre Belloni, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com
^ permalink raw reply [flat|nested] 2+ messages in thread
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2020-03-22 21:11 ` Alexandre Belloni
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