power: supply: twl4030_charger: Use sysfs_match_string() helper

Use sysfs_match_string() helper instead of open coded variant.

Cc: Sebastian Reichel <sre@kernel.org>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>

diff --git a/drivers/power/supply/twl4030_charger.c b/drivers/power/supply/twl4030_charger.c
index 785a07bc4f39e8308da40679f319e47400b5276c..07c70e59f31aee9b061e49bc3a80a7b963cf92ec 100644 (file)
--- a/drivers/power/supply/twl4030_charger.c
+++ b/drivers/power/supply/twl4030_charger.c
@@ -153,7 +153,7 @@ struct twl4030_bci {
 };
 
 /* strings for 'usb_mode' values */
-static char *modes[] = { "off", "auto", "continuous" };
+static const char *modes[] = { "off", "auto", "continuous" };
 
 /*
  * clear and set bits on an given register on a given module
@@ -669,14 +669,10 @@ twl4030_bci_mode_store(struct device *dev, struct device_attribute *attr,
        int mode;
        int status;
 
-       if (sysfs_streq(buf, modes[0]))
-               mode = 0;
-       else if (sysfs_streq(buf, modes[1]))
-               mode = 1;
-       else if (sysfs_streq(buf, modes[2]))
-               mode = 2;
-       else
-               return -EINVAL;
+       mode = sysfs_match_string(modes, buf);
+       if (mode < 0)
+               return mode;
+
        if (dev == &bci->ac->dev) {
                if (mode == 2)
                        return -EINVAL;