linux-kernel - [RFC PATCH 1/3] gnss: Add AI2 protocol used by some TI combo chips.

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Message-Id: <20231126191840.110564-2-andreas@kemnade.info>
Date:   Sun, 26 Nov 2023 20:18:38 +0100
From:   Andreas Kemnade <andreas@...nade.info>
To:     marcel@...tmann.org, johan.hedberg@...il.com, luiz.dentz@...il.com,
        johan@...nel.org, arnd@...db.de, gregkh@...uxfoundation.org,
        andreas@...nade.info, linux-bluetooth@...r.kernel.org,
        linux-kernel@...r.kernel.org, tomi.valkeinen@...asonboard.com,
        Tony Lindgren <tony@...mide.com>,
        Péter Ujfalusi <peter.ujfalusi@...il.com>,
        robh@...nel.org
Subject: [RFC PATCH 1/3] gnss: Add AI2 protocol used by some TI combo chips.

Texas Instruments uses something called Air Independent Interface (AI2) for
their WLAN/BT/GPS combo chips.
No public documentation is available, by looking into captured data, it
becomes clear that you can either raw data or encapsulated NMEA after some
initialization commands.

Signed-off-by: Andreas Kemnade <andreas@...nade.info>
---
 drivers/gnss/core.c  | 1 +
 include/linux/gnss.h | 1 +
 2 files changed, 2 insertions(+)

diff --git a/drivers/gnss/core.c b/drivers/gnss/core.c
index 48f2ee0f78c4d..cac9f45aec4b2 100644
--- a/drivers/gnss/core.c
+++ b/drivers/gnss/core.c
@@ -335,6 +335,7 @@ static const char * const gnss_type_names[GNSS_TYPE_COUNT] = {
 	[GNSS_TYPE_SIRF]	= "SiRF",
 	[GNSS_TYPE_UBX]		= "UBX",
 	[GNSS_TYPE_MTK]		= "MTK",
+	[GNSS_TYPE_AI2]		= "AI2",
 };
 
 static const char *gnss_type_name(const struct gnss_device *gdev)
diff --git a/include/linux/gnss.h b/include/linux/gnss.h
index 36968a0f33e8d..16b565dab83ea 100644
--- a/include/linux/gnss.h
+++ b/include/linux/gnss.h
@@ -23,6 +23,7 @@ enum gnss_type {
 	GNSS_TYPE_SIRF,
 	GNSS_TYPE_UBX,
 	GNSS_TYPE_MTK,
+	GNSS_TYPE_AI2,
 
 	GNSS_TYPE_COUNT
 };
-- 
2.39.2