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watchdog: realtek_otto: 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 and avoids the need of a dedicated function used
with devm_add_action_or_reset().

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Acked-by: Sander Vanheule <sander@svanheule.net>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/5e4255782fbb43d1b4b5cd03bd12d7a184497134.1672498920.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 2022-12-31 16:02:17 +01:00 committed by Wim Van Sebroeck
parent a224764f97
commit 3c22939eb3
1 changed files with 2 additions and 15 deletions
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17
drivers/watchdog/realtek_otto_wdt.c
View File

@ -235,27 +235,14 @@ static const struct watchdog_info otto_wdt_info = {
WDIOF_PRETIMEOUT,
};
static void otto_wdt_clock_action(void *data)
{
clk_disable_unprepare(data);
}
static int otto_wdt_probe_clk(struct otto_wdt_ctrl *ctrl)
{
struct clk *clk = devm_clk_get(ctrl->dev, NULL);
int ret;
struct clk *clk;
clk = devm_clk_get_enabled(ctrl->dev, NULL);
if (IS_ERR(clk))
return dev_err_probe(ctrl->dev, PTR_ERR(clk), "Failed to get clock\n");
ret = clk_prepare_enable(clk);
if (ret)
return dev_err_probe(ctrl->dev, ret, "Failed to enable clock\n");
ret = devm_add_action_or_reset(ctrl->dev, otto_wdt_clock_action, clk);
if (ret)
return ret;
ctrl->clk_rate_khz = clk_get_rate(clk) / 1000;
if (ctrl->clk_rate_khz == 0)
return dev_err_probe(ctrl->dev, -ENXIO, "Failed to get clock rate\n");