[PATCH v4 1/3] dm: extcon: add an uclass for extcon

[Svyatoslav Ryhel]

Add a new simple uclass for extcon. Currently all setup is done
in the probe. Uclass struct and ops are empty for now.

Signed-off-by: Svyatoslav Ryhel <clamor95 at gmail.com>
Reviewed-by: Simon Glass <sjg at chromium.org>
---
 drivers/Kconfig                |  2 ++
 drivers/Makefile               |  1 +
 drivers/extcon/Kconfig         | 15 +++++++++++++++
 drivers/extcon/Makefile        |  5 +++++
 drivers/extcon/extcon-uclass.c | 16 ++++++++++++++++
 include/dm/uclass-id.h         |  1 +
 include/extcon.h               | 19 +++++++++++++++++++
 7 files changed, 59 insertions(+)
 create mode 100644 drivers/extcon/Kconfig
 create mode 100644 drivers/extcon/Makefile
 create mode 100644 drivers/extcon/extcon-uclass.c
 create mode 100644 include/extcon.h

diff --git a/drivers/Kconfig b/drivers/Kconfig
index 9101e538b0..75937fbb6d 100644
--- a/drivers/Kconfig
+++ b/drivers/Kconfig
@@ -36,6 +36,8 @@ source "drivers/dfu/Kconfig"
 
 source "drivers/dma/Kconfig"
 
+source "drivers/extcon/Kconfig"
+
 source "drivers/fastboot/Kconfig"
 
 source "drivers/firmware/Kconfig"
diff --git a/drivers/Makefile b/drivers/Makefile
index 58be410135..ed1e71c4d6 100644
--- a/drivers/Makefile
+++ b/drivers/Makefile
@@ -9,6 +9,7 @@ obj-$(CONFIG_$(SPL_TPL_)DM) += core/
 obj-$(CONFIG_$(SPL_TPL_)DMA) += dma/
 obj-$(CONFIG_$(SPL_TPL_)DMA_LEGACY) += dma/
 obj-$(CONFIG_$(SPL_TPL_)DFU) += dfu/
+obj-$(CONFIG_$(SPL_TPL_)EXTCON) += extcon/
 obj-$(CONFIG_$(SPL_TPL_)GPIO) += gpio/
 obj-$(CONFIG_$(SPL_TPL_)DRIVERS_MISC) += misc/
 obj-$(CONFIG_$(SPL_TPL_)SYSRESET) += sysreset/
diff --git a/drivers/extcon/Kconfig b/drivers/extcon/Kconfig
new file mode 100644
index 0000000000..8a50250d21
--- /dev/null
+++ b/drivers/extcon/Kconfig
@@ -0,0 +1,15 @@
+menu "Extcon Support"
+
+config EXTCON
+	bool "External Connector Class (extcon) support"
+	depends on DM
+	help
+	  Say Y here to enable external connector class (extcon) support.
+	  This allows monitoring external connectors and supports external
+	  connectors with multiple states; i.e., an extcon that may have
+	  multiple cables attached. For example, an external connector
+	  of a device may be used to connect an HDMI cable and a AC adaptor,
+	  and to host USB ports. Many of 30-pin connectors including PDMI
+	  are also good examples.
+
+endmenu
diff --git a/drivers/extcon/Makefile b/drivers/extcon/Makefile
new file mode 100644
index 0000000000..2510e91c07
--- /dev/null
+++ b/drivers/extcon/Makefile
@@ -0,0 +1,5 @@
+# SPDX-License-Identifier: GPL-2.0+
+#
+# Copyright (C) 2023 Svyatoslav Ryhel <clamor95 at gmail.com>
+
+obj-$(CONFIG_EXTCON) += extcon-uclass.o
diff --git a/drivers/extcon/extcon-uclass.c b/drivers/extcon/extcon-uclass.c
new file mode 100644
index 0000000000..9dd22b5762
--- /dev/null
+++ b/drivers/extcon/extcon-uclass.c
@@ -0,0 +1,16 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2023 Svyatoslav Ryhel <clamor95 at gmail.com>
+ */
+
+#define LOG_CATEGORY UCLASS_EXTCON
+
+#include <common.h>
+#include <extcon.h>
+#include <dm.h>
+
+UCLASS_DRIVER(extcon) = {
+	.id			= UCLASS_EXTCON,
+	.name			= "extcon",
+	.per_device_plat_auto	= sizeof(struct extcon_uc_plat),
+};
diff --git a/include/dm/uclass-id.h b/include/dm/uclass-id.h
index 576237b954..94ab46c5ba 100644
--- a/include/dm/uclass-id.h
+++ b/include/dm/uclass-id.h
@@ -56,6 +56,7 @@ enum uclass_id {
 	UCLASS_EFI_MEDIA,	/* Devices provided by UEFI firmware */
 	UCLASS_ETH,		/* Ethernet device */
 	UCLASS_ETH_PHY,		/* Ethernet PHY device */
+	UCLASS_EXTCON,		/* External Connector Class */
 	UCLASS_FIRMWARE,	/* Firmware */
 	UCLASS_FPGA,		/* FPGA device */
 	UCLASS_FUZZING_ENGINE,	/* Fuzzing engine */
diff --git a/include/extcon.h b/include/extcon.h
new file mode 100644
index 0000000000..d060f5a3c1
--- /dev/null
+++ b/include/extcon.h
@@ -0,0 +1,19 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (C) 2023 Svyatoslav Ryhel <clamor95 at gmail.com>
+ */
+
+#ifndef __EXTCON_H
+#define __EXTCON_H
+
+struct udevice;
+
+/**
+ * struct extcon_uc_plat - Platform data the uclass stores about each device
+ *
+ * To be filled
+ */
+struct extcon_uc_plat {
+};
+
+#endif
-- 
2.39.2