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mfd: wm831x: Use DEVICE_ATTR_RO macro
Use DEVICE_ATTR_RO macro helper instead of plain DEVICE_ATTR, which makes the code a bit shorter and easier to read. Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com> Acked-by: Charles Keepax <ckeepax@opensource.cirrus.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
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@ -38,7 +38,7 @@ static int wm831x_unique_id_read(struct wm831x *wm831x, char *id)
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return 0;
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}
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static ssize_t wm831x_unique_id_show(struct device *dev,
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static ssize_t unique_id_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct wm831x *wm831x = dev_get_drvdata(dev);
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@ -52,7 +52,7 @@ static ssize_t wm831x_unique_id_show(struct device *dev,
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return sprintf(buf, "%*phN\n", WM831X_UNIQUE_ID_LEN, id);
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}
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static DEVICE_ATTR(unique_id, 0444, wm831x_unique_id_show, NULL);
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static DEVICE_ATTR_RO(unique_id);
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int wm831x_otp_init(struct wm831x *wm831x)
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{
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