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watchdog: dw_wdt: Simplify clk management 

Use devm_clk_get_enabled() instead of hand-writing it.
This saves some LoC.

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/f6094c55cacf9637d835cd49290d9e888faeb0f7.1682491863.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
This commit is contained in:
Christophe JAILLET 2023-04-26 08:52:49 +02:00 committed by Wim Van Sebroeck
parent 7f53907506
commit 10f67d1fd2
1 changed files with 11 additions and 33 deletions
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44
drivers/watchdog/dw_wdt.c
View File

@ -566,22 +566,16 @@ static int dw_wdt_drv_probe(struct platform_device *pdev)
* to the common timer/bus clocks configuration, in which the very
* first found clock supply both timer and APB signals.
*/
dw_wdt->clk = devm_clk_get(dev, "tclk");
dw_wdt->clk = devm_clk_get_enabled(dev, "tclk");
if (IS_ERR(dw_wdt->clk)) {
dw_wdt->clk = devm_clk_get(dev, NULL);
dw_wdt->clk = devm_clk_get_enabled(dev, NULL);
if (IS_ERR(dw_wdt->clk))
return PTR_ERR(dw_wdt->clk);
}
ret = clk_prepare_enable(dw_wdt->clk);
if (ret)
return ret;
dw_wdt->rate = clk_get_rate(dw_wdt->clk);
if (dw_wdt->rate == 0) {
ret = -EINVAL;
goto out_disable_clk;
}
if (dw_wdt->rate == 0)
return -EINVAL;
/*
* Request APB clock if device is configured with async clocks mode.
@ -590,21 +584,13 @@ static int dw_wdt_drv_probe(struct platform_device *pdev)
* so the pclk phandle reference is left optional. If it couldn't be
* found we consider the device configured in synchronous clocks mode.
*/
dw_wdt->pclk = devm_clk_get_optional(dev, "pclk");
if (IS_ERR(dw_wdt->pclk)) {
ret = PTR_ERR(dw_wdt->pclk);
goto out_disable_clk;
}
ret = clk_prepare_enable(dw_wdt->pclk);
if (ret)
goto out_disable_clk;
dw_wdt->pclk = devm_clk_get_optional_enabled(dev, "pclk");
if (IS_ERR(dw_wdt->pclk))
return PTR_ERR(dw_wdt->pclk);
dw_wdt->rst = devm_reset_control_get_optional_shared(&pdev->dev, NULL);
if (IS_ERR(dw_wdt->rst)) {
ret = PTR_ERR(dw_wdt->rst);
goto out_disable_pclk;
}
if (IS_ERR(dw_wdt->rst))
return PTR_ERR(dw_wdt->rst);
/* Enable normal reset without pre-timeout by default. */
dw_wdt_update_mode(dw_wdt, DW_WDT_RMOD_RESET);
@ -621,12 +607,12 @@ static int dw_wdt_drv_probe(struct platform_device *pdev)
IRQF_SHARED | IRQF_TRIGGER_RISING,
pdev->name, dw_wdt);
if (ret)
goto out_disable_pclk;
return ret;
dw_wdt->wdd.info = &dw_wdt_pt_ident;
} else {
if (ret == -EPROBE_DEFER)
goto out_disable_pclk;
return ret;
dw_wdt->wdd.info = &dw_wdt_ident;
}
@ -675,12 +661,6 @@ static int dw_wdt_drv_probe(struct platform_device *pdev)
out_assert_rst:
reset_control_assert(dw_wdt->rst);
out_disable_pclk:
clk_disable_unprepare(dw_wdt->pclk);
out_disable_clk:
clk_disable_unprepare(dw_wdt->clk);
return ret;
}
@ -692,8 +672,6 @@ static void dw_wdt_drv_remove(struct platform_device *pdev)
watchdog_unregister_device(&dw_wdt->wdd);
reset_control_assert(dw_wdt->rst);
clk_disable_unprepare(dw_wdt->pclk);
clk_disable_unprepare(dw_wdt->clk);
}
#ifdef CONFIG_OF