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pwm: sysfs: Properly convert from enum to string

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The current code will check for polarity in a boolean way. While it is
correct that polarity is either normal or inversed, make it more obvious
that it's an enumeration by using a switch statement and explicit
matches on the enumeration values.

Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
This commit is contained in:
Thierry Reding 2015-07-20 09:56:05 +02:00
parent 15da7b5001
commit 5a063d87e9
1 changed files with 12 additions and 2 deletions
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14
drivers/pwm/sysfs.c
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@ -133,9 +133,19 @@ static ssize_t pwm_polarity_show(struct device *child,
char *buf)
{
const struct pwm_device *pwm = child_to_pwm_device(child);
const char *polarity = "unknown";
return sprintf(buf, "%s\n",
pwm_get_polarity(pwm) ? "inversed" : "normal");
switch (pwm_get_polarity(pwm)) {
case PWM_POLARITY_NORMAL:
polarity = "normal";
break;
case PWM_POLARITY_INVERSED:
polarity = "inversed";
break;
}
return sprintf(buf, "%s\n", polarity);
}
static ssize_t pwm_polarity_store(struct device *child,