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rtc: mxc: Use devm_clk_get_enabled() helper 

The devm_clk_get_enabled() helper:
   - calls devm_clk_get()
   - calls clk_prepare_enable() and registers what is needed in order to
     call clk_disable_unprepare() when needed, as a managed resource.

This simplifies the code, the error handling paths and avoid the need of
a dedicated function used with devm_add_action_or_reset().

Based on my test with allyesconfig, this reduces the .o size from:
   text	   data	    bss	    dec	    hex	filename
   6705	   1968	      0	   8673	   21e1	drivers/rtc/rtc-mxc.o
down to:
   6212	   1968	      0	   8180	   1ff4	drivers/rtc/rtc-mxc.o

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/1b5ad1877304b01ddbba73ca615274a52f781aa2.1660582728.git.christophe.jaillet@wanadoo.fr
This commit is contained in:
Christophe JAILLET 2022-08-15 18:59:23 +02:00 committed by Alexandre Belloni
parent 509451ac03
commit 25bcfaad5e
1 changed files with 2 additions and 25 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

27
drivers/rtc/rtc-mxc.c
View File

@ -291,14 +291,6 @@ 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;
@ -341,33 +333,18 @@ static int mxc_rtc_probe(struct platform_device *pdev)
rtc->range_max = (1 << 16) * 86400ULL - 1;
}
pdata->clk_ipg = devm_clk_get(&pdev->dev, "ipg");
pdata->clk_ipg = devm_clk_get_enabled(&pdev->dev, "ipg");
if (IS_ERR(pdata->clk_ipg)) {
dev_err(&pdev->dev, "unable to get ipg clock!\n");
return PTR_ERR(pdata->clk_ipg);
}
ret = clk_prepare_enable(pdata->clk_ipg);
if (ret)
return ret;
pdata->clk_ref = devm_clk_get(&pdev->dev, "ref");
pdata->clk_ref = devm_clk_get_enabled(&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");
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)
return ret;
rate = clk_get_rate(pdata->clk_ref);
if (rate == 32768)