[PATCH -next v2] mfd: ab3100-core: Convert to DEFINE_SHOW_ATTRIBUTE

[Qinglang Miao]

Use DEFINE_SHOW_ATTRIBUTE macro to simplify the code.

Signed-off-by: Qinglang Miao <miaoqinglang@xxxxxxxxxx>
---
v2: based on linux-next(20200917), and can be applied to
    mainline cleanly now.

 drivers/mfd/ab3100-core.c | 15 ++-------------
 1 file changed, 2 insertions(+), 13 deletions(-)

diff --git a/drivers/mfd/ab3100-core.c b/drivers/mfd/ab3100-core.c
index ee71ae04b..4a347d059 100644
--- a/drivers/mfd/ab3100-core.c
+++ b/drivers/mfd/ab3100-core.c
@@ -451,7 +451,7 @@ static irqreturn_t ab3100_irq_handler(int irq, void *data)
 /*
  * Some debugfs entries only exposed if we're using debug
  */
-static int ab3100_registers_print(struct seq_file *s, void *p)
+static int ab3100_registers_show(struct seq_file *s, void *p)
 {
 	struct ab3100 *ab3100 = s->private;
 	u8 value;
@@ -466,18 +466,7 @@ static int ab3100_registers_print(struct seq_file *s, void *p)
 	return 0;
 }
 
-static int ab3100_registers_open(struct inode *inode, struct file *file)
-{
-	return single_open(file, ab3100_registers_print, inode->i_private);
-}
-
-static const struct file_operations ab3100_registers_fops = {
-	.open = ab3100_registers_open,
-	.read = seq_read,
-	.llseek = seq_lseek,
-	.release = single_release,
-	.owner = THIS_MODULE,
-};
+DEFINE_SHOW_ATTRIBUTE(ab3100_registers);
 
 struct ab3100_get_set_reg_priv {
 	struct ab3100 *ab3100;
-- 
2.23.0