From c4941a82a45d571ed64623ca3113f44157a9251c Mon Sep 17 00:00:00 2001
From: Andrew Zaborowski <andrew.zaborowski@intel.com>
Date: Tue, 4 Oct 2016 05:47:52 +0200
Subject: [PATCH] scan: Implement scan_channel_to_freq

This function does the inverse of scan_freq_to_channel
---
 src/scan.c | 21 +++++++++++++++++++++
 src/scan.h |  1 +
 2 files changed, 22 insertions(+)

diff --git a/src/scan.c b/src/scan.c
index f13c8026..44ea8d27 100644
--- a/src/scan.c
+++ b/src/scan.c
@@ -1092,6 +1092,27 @@ uint8_t scan_freq_to_channel(uint32_t freq, enum scan_band *out_band)
 	return 0;
 }
 
+uint32_t scan_channel_to_freq(uint8_t channel, enum scan_band band)
+{
+	if (band == SCAN_BAND_2_4_GHZ) {
+		if (channel >= 1 && channel <= 13)
+			return 2407 + 5 * channel;
+
+		if (channel == 14)
+			return 2484;
+	}
+
+	if (band == SCAN_BAND_5_GHZ) {
+		if (channel >= 1 && channel <= 179)
+			return 5000 + 5 * channel;
+
+		if (channel >= 181 && channel <= 199)
+			return 4000 + 5 * channel;
+	}
+
+	return 0;
+}
+
 struct scan_freq_set {
 	uint16_t channels_2ghz;
 	struct l_uintset *channels_5ghz;
diff --git a/src/scan.h b/src/scan.h
index 12257541..65c7e386 100644
--- a/src/scan.h
+++ b/src/scan.h
@@ -86,6 +86,7 @@ void bss_get_supported_ciphers(struct scan_bss *bss,
 				uint16_t *group_ciphers);
 
 uint8_t scan_freq_to_channel(uint32_t freq, enum scan_band *out_band);
+uint32_t scan_channel_to_freq(uint8_t channel, enum scan_band band);
 
 struct scan_freq_set *scan_freq_set_new(void);
 void scan_freq_set_free(struct scan_freq_set *freqs);