[PATCH rtw-next v2 02/12] wifi: rtw89: regd: introduce string getter for reuse

[Ping-Ke Shih <pkshih@xxxxxxxxxxx>]

From: Zong-Zhe Yang <kevin_yang@xxxxxxxxxxx>

Introduce a function to get the string for a given regulatory. It will be
used in the following. Besides, drop similar things in debug code and use
this too.

Signed-off-by: Zong-Zhe Yang <kevin_yang@xxxxxxxxxxx>
Signed-off-by: Ping-Ke Shih <pkshih@xxxxxxxxxxx>
---
v2: no change
---
 drivers/net/wireless/realtek/rtw89/core.h  |  1 +
 drivers/net/wireless/realtek/rtw89/debug.c | 29 +-------------------
 drivers/net/wireless/realtek/rtw89/regd.c  | 32 ++++++++++++++++++++++
 3 files changed, 34 insertions(+), 28 deletions(-)

diff --git a/drivers/net/wireless/realtek/rtw89/core.h b/drivers/net/wireless/realtek/rtw89/core.h
index 8e9697679aaa..18340a9cd72b 100644
--- a/drivers/net/wireless/realtek/rtw89/core.h
+++ b/drivers/net/wireless/realtek/rtw89/core.h
@@ -7185,6 +7185,7 @@ void rtw89_chip_cfg_txpwr_ul_tb_offset(struct rtw89_dev *rtwdev,
 bool rtw89_ra_report_to_bitrate(struct rtw89_dev *rtwdev, u8 rpt_rate, u16 *bitrate);
 int rtw89_regd_setup(struct rtw89_dev *rtwdev);
 int rtw89_regd_init_hint(struct rtw89_dev *rtwdev);
+const char *rtw89_regd_get_string(enum rtw89_regulation_type regd);
 void rtw89_traffic_stats_init(struct rtw89_dev *rtwdev,
 			      struct rtw89_traffic_stats *stats);
 int rtw89_wait_for_cond(struct rtw89_wait_info *wait, unsigned int cond);
diff --git a/drivers/net/wireless/realtek/rtw89/debug.c b/drivers/net/wireless/realtek/rtw89/debug.c
index f2c5753fd386..5105a192b15a 100644
--- a/drivers/net/wireless/realtek/rtw89/debug.c
+++ b/drivers/net/wireless/realtek/rtw89/debug.c
@@ -854,11 +854,6 @@ static ssize_t __print_txpwr_map(struct rtw89_dev *rtwdev, char *buf, size_t buf
 	return p - buf;
 }
 
-#define case_REGD(_regd) \
-	case RTW89_ ## _regd: \
-		p += scnprintf(p, end - p, #_regd "\n"); \
-		break
-
 static int __print_regd(struct rtw89_dev *rtwdev, char *buf, size_t bufsz,
 			const struct rtw89_chan *chan)
 {
@@ -866,33 +861,11 @@ static int __print_regd(struct rtw89_dev *rtwdev, char *buf, size_t bufsz,
 	u8 band = chan->band_type;
 	u8 regd = rtw89_regd_get(rtwdev, band);
 
-	switch (regd) {
-	default:
-		p += scnprintf(p, end - p, "UNKNOWN: %d\n", regd);
-		break;
-	case_REGD(WW);
-	case_REGD(ETSI);
-	case_REGD(FCC);
-	case_REGD(MKK);
-	case_REGD(NA);
-	case_REGD(IC);
-	case_REGD(KCC);
-	case_REGD(NCC);
-	case_REGD(CHILE);
-	case_REGD(ACMA);
-	case_REGD(MEXICO);
-	case_REGD(UKRAINE);
-	case_REGD(CN);
-	case_REGD(QATAR);
-	case_REGD(UK);
-	case_REGD(THAILAND);
-	}
+	p += scnprintf(p, end - p, "%s\n", rtw89_regd_get_string(regd));
 
 	return p - buf;
 }
 
-#undef case_REGD
-
 struct dbgfs_txpwr_table {
 	const struct txpwr_map *byr;
 	const struct txpwr_map *lmt;
diff --git a/drivers/net/wireless/realtek/rtw89/regd.c b/drivers/net/wireless/realtek/rtw89/regd.c
index 655323a79608..49e9540f2049 100644
--- a/drivers/net/wireless/realtek/rtw89/regd.c
+++ b/drivers/net/wireless/realtek/rtw89/regd.c
@@ -588,6 +588,38 @@ static void rtw89_regd_setup_6ghz(struct rtw89_dev *rtwdev, struct wiphy *wiphy)
 	kfree(sband);
 }
 
+#define RTW89_DEF_REGD_STR(regd) \
+	[RTW89_ ## regd] = #regd
+
+static const char * const rtw89_regd_string[] = {
+	RTW89_DEF_REGD_STR(WW),
+	RTW89_DEF_REGD_STR(ETSI),
+	RTW89_DEF_REGD_STR(FCC),
+	RTW89_DEF_REGD_STR(MKK),
+	RTW89_DEF_REGD_STR(NA),
+	RTW89_DEF_REGD_STR(IC),
+	RTW89_DEF_REGD_STR(KCC),
+	RTW89_DEF_REGD_STR(ACMA),
+	RTW89_DEF_REGD_STR(NCC),
+	RTW89_DEF_REGD_STR(MEXICO),
+	RTW89_DEF_REGD_STR(CHILE),
+	RTW89_DEF_REGD_STR(UKRAINE),
+	RTW89_DEF_REGD_STR(CN),
+	RTW89_DEF_REGD_STR(QATAR),
+	RTW89_DEF_REGD_STR(UK),
+	RTW89_DEF_REGD_STR(THAILAND),
+};
+
+static_assert(ARRAY_SIZE(rtw89_regd_string) == RTW89_REGD_NUM);
+
+const char *rtw89_regd_get_string(enum rtw89_regulation_type regd)
+{
+	if (regd < 0 || regd >= RTW89_REGD_NUM)
+		return "(unknown)";
+
+	return rtw89_regd_string[regd];
+}
+
 int rtw89_regd_setup(struct rtw89_dev *rtwdev)
 {
 	struct rtw89_regulatory_info *regulatory = &rtwdev->regulatory;
-- 
2.25.1