linux-kernel - [PATCH v3 6/8] greybus: Add mikroBUS manifest types

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Date: Sat, 16 Mar 2024 00:19:04 +0530
From: Ayush Singh <ayushdevel1325@...il.com>
To: linux-kernel@...r.kernel.org
Cc: Ayush Singh <ayushdevel1325@...il.com>,
	jkridner@...gleboard.org,
	robertcnelson@...gleboard.org,
	Vaishnav M A <vaishnav@...gleboard.org>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Nishanth Menon <nm@...com>,
	Vignesh Raghavendra <vigneshr@...com>,
	Tero Kristo <kristo@...nel.org>,
	Derek Kiernan <derek.kiernan@....com>,
	Dragan Cvetic <dragan.cvetic@....com>,
	Arnd Bergmann <arnd@...db.de>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Liam Girdwood <lgirdwood@...il.com>,
	Mark Brown <broonie@...nel.org>,
	Jiri Slaby <jirislaby@...nel.org>,
	Johan Hovold <johan@...nel.org>,
	Alex Elder <elder@...nel.org>,
	devicetree@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-spi@...r.kernel.org,
	linux-serial@...r.kernel.org,
	greybus-dev@...ts.linaro.org
Subject: [PATCH v3 6/8] greybus: Add mikroBUS manifest types

Add data structures for parsing mikroBUS manifests, which are based on
greybus manifest.

Signed-off-by: Ayush Singh <ayushdevel1325@...il.com>
---
 include/linux/greybus/greybus_manifest.h | 49 ++++++++++++++++++++++++
 1 file changed, 49 insertions(+)

diff --git a/include/linux/greybus/greybus_manifest.h b/include/linux/greybus/greybus_manifest.h
index bef9eb2093e9..83241e19d9b3 100644
--- a/include/linux/greybus/greybus_manifest.h
+++ b/include/linux/greybus/greybus_manifest.h
@@ -23,6 +23,9 @@ enum greybus_descriptor_type {
 	GREYBUS_TYPE_STRING		= 0x02,
 	GREYBUS_TYPE_BUNDLE		= 0x03,
 	GREYBUS_TYPE_CPORT		= 0x04,
+	GREYBUS_TYPE_MIKROBUS		= 0x05,
+	GREYBUS_TYPE_PROPERTY		= 0x06,
+	GREYBUS_TYPE_DEVICE		= 0x07,
 };
 
 enum greybus_protocol {
@@ -151,6 +154,49 @@ struct greybus_descriptor_cport {
 	__u8	protocol_id;	/* enum greybus_protocol */
 } __packed;
 
+/*
+ * A mikrobus descriptor is used to describe the details
+ * about the bus ocnfiguration for the add-on board
+ * connected to the mikrobus port.
+ */
+struct greybus_descriptor_mikrobus {
+	__u8 pin_state[12];
+} __packed;
+
+/*
+ * A property descriptor is used to pass named properties
+ * to device drivers through the unified device properties
+ * interface under linux/property.h
+ */
+struct greybus_descriptor_property {
+	__u8 length;
+	__u8 id;
+	__u8 propname_stringid;
+	__u8 type;
+	__u8 value[];
+} __packed;
+
+/*
+ * A device descriptor is used to describe the
+ * details required by a add-on board device
+ * driver.
+ */
+struct greybus_descriptor_device {
+	__u8 id;
+	__u8 driver_stringid;
+	__u8 protocol;
+	__u8 reg;
+	__le32 max_speed_hz;
+	__u8 irq;
+	__u8 irq_type;
+	__u8 mode;
+	__u8 prop_link;
+	__u8 gpio_link;
+	__u8 reg_link;
+	__u8 clock_link;
+	__u8 pad[1];
+} __packed;
+
 struct greybus_descriptor_header {
 	__le16	size;
 	__u8	type;		/* enum greybus_descriptor_type */
@@ -164,6 +210,9 @@ struct greybus_descriptor {
 		struct greybus_descriptor_interface	interface;
 		struct greybus_descriptor_bundle	bundle;
 		struct greybus_descriptor_cport		cport;
+		struct greybus_descriptor_mikrobus	mikrobus;
+		struct greybus_descriptor_property	property;
+		struct greybus_descriptor_device	device;
 	};
 } __packed;
 
-- 
2.44.0