linux-kernel - [PATCH] regulator: convert to DEFINE_SHOW

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Date:   Sat, 15 Dec 2018 03:21:48 -0500
From:   Yangtao Li <tiny.windzz@...il.com>
To:     lgirdwood@...il.com, broonie@...nel.org
Cc:     linux-kernel@...r.kernel.org, Yangtao Li <tiny.windzz@...il.com>
Subject: [PATCH] regulator: convert to DEFINE_SHOW_ATTRIBUTE

Use DEFINE_SHOW_ATTRIBUTE macro to simplify the code.

Signed-off-by: Yangtao Li <tiny.windzz@...il.com>
---
 drivers/regulator/core.c         | 37 +++++---------------------------
 drivers/regulator/dbx500-prcmu.c | 35 ++++--------------------------
 2 files changed, 9 insertions(+), 63 deletions(-)

diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index 2c66b528aede..efcfc5e2ff85 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -4621,23 +4621,8 @@ static int supply_map_show(struct seq_file *sf, void *data)
 
 	return 0;
 }
+DEFINE_SHOW_ATTRIBUTE(supply_map);
 
-static int supply_map_open(struct inode *inode, struct file *file)
-{
-	return single_open(file, supply_map_show, inode->i_private);
-}
-#endif
-
-static const struct file_operations supply_map_fops = {
-#ifdef CONFIG_DEBUG_FS
-	.open = supply_map_open,
-	.read = seq_read,
-	.llseek = seq_lseek,
-	.release = single_release,
-#endif
-};
-
-#ifdef CONFIG_DEBUG_FS
 struct summary_data {
 	struct seq_file *s;
 	struct regulator_dev *parent;
@@ -4755,21 +4740,8 @@ static int regulator_summary_show(struct seq_file *s, void *data)
 
 	return 0;
 }
-
-static int regulator_summary_open(struct inode *inode, struct file *file)
-{
-	return single_open(file, regulator_summary_show, inode->i_private);
-}
-#endif
-
-static const struct file_operations regulator_summary_fops = {
-#ifdef CONFIG_DEBUG_FS
-	.open		= regulator_summary_open,
-	.read		= seq_read,
-	.llseek		= seq_lseek,
-	.release	= single_release,
-#endif
-};
+DEFINE_SHOW_ATTRIBUTE(regulator_summary);
+#endif /* CONFIG_DEBUG_FS */
 
 static int __init regulator_init(void)
 {
@@ -4781,12 +4753,13 @@ static int __init regulator_init(void)
 	if (!debugfs_root)
 		pr_warn("regulator: Failed to create debugfs directory\n");
 
+#ifdef CONFIG_DEBUG_FS
 	debugfs_create_file("supply_map", 0444, debugfs_root, NULL,
 			    &supply_map_fops);
 
 	debugfs_create_file("regulator_summary", 0444, debugfs_root,
 			    NULL, &regulator_summary_fops);
-
+#endif
 	regulator_dummy_init();
 
 	return ret;
diff --git a/drivers/regulator/dbx500-prcmu.c b/drivers/regulator/dbx500-prcmu.c
index 8976141c1438..308e3ff0a1bd 100644
--- a/drivers/regulator/dbx500-prcmu.c
+++ b/drivers/regulator/dbx500-prcmu.c
@@ -75,7 +75,7 @@ static struct ux500_regulator_debug {
 	u8 *state_after_suspend;
 } rdebug;
 
-static int ux500_regulator_power_state_cnt_print(struct seq_file *s, void *p)
+static int ux500_regulator_power_state_cnt_show(struct seq_file *s, void *p)
 {
 	/* print power state count */
 	seq_printf(s, "ux500-regulator power state count: %i\n",
@@ -83,23 +83,9 @@ static int ux500_regulator_power_state_cnt_print(struct seq_file *s, void *p)
 
 	return 0;
 }
+DEFINE_SHOW_ATTRIBUTE(ux500_regulator_power_state_cnt);
 
-static int ux500_regulator_power_state_cnt_open(struct inode *inode,
-	struct file *file)
-{
-	return single_open(file, ux500_regulator_power_state_cnt_print,
-		inode->i_private);
-}
-
-static const struct file_operations ux500_regulator_power_state_cnt_fops = {
-	.open = ux500_regulator_power_state_cnt_open,
-	.read = seq_read,
-	.llseek = seq_lseek,
-	.release = single_release,
-	.owner = THIS_MODULE,
-};
-
-static int ux500_regulator_status_print(struct seq_file *s, void *p)
+static int ux500_regulator_status_show(struct seq_file *s, void *p)
 {
 	int i;
 
@@ -122,20 +108,7 @@ static int ux500_regulator_status_print(struct seq_file *s, void *p)
 
 	return 0;
 }
-
-static int ux500_regulator_status_open(struct inode *inode, struct file *file)
-{
-	return single_open(file, ux500_regulator_status_print,
-		inode->i_private);
-}
-
-static const struct file_operations ux500_regulator_status_fops = {
-	.open = ux500_regulator_status_open,
-	.read = seq_read,
-	.llseek = seq_lseek,
-	.release = single_release,
-	.owner = THIS_MODULE,
-};
+DEFINE_SHOW_ATTRIBUTE(ux500_regulator_status);
 
 int __attribute__((weak)) dbx500_regulator_testcase(
 	struct dbx500_regulator_info *regulator_info,
-- 
2.17.0