board: st: move type-c stusb1600 controller code in a driver
Migrate the ST Microelectronics STUSB160X Type-C controller code in
a generic I2C driver in st/common, based on Linux one in :
drivers/usb/typec/stusb160x.c
This patch simplifies the stm32mp1 board code and allows to reuse
this STUSB160X driver in other boards.
Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
Reviewed-by: Patrice Chotard <patrice.chotard@st.com>
diff --git a/board/st/common/Kconfig b/board/st/common/Kconfig
index 750dbb6..ddcf33a 100644
--- a/board/st/common/Kconfig
+++ b/board/st/common/Kconfig
@@ -69,3 +69,10 @@
depends on ARCH_STM32MP && SET_DFU_ALT_INFO
help
This defines the partitions of ram used to build dfu dynamically.
+
+config TYPEC_STUSB160X
+ tristate "STMicroelectronics STUSB160X Type-C controller driver"
+ depends on DM_I2C
+ help
+ Say Y if your system has STMicroelectronics STUSB160X Type-C port
+ controller.
diff --git a/board/st/common/Makefile b/board/st/common/Makefile
index 012bfbb..65bbebd 100644
--- a/board/st/common/Makefile
+++ b/board/st/common/Makefile
@@ -10,3 +10,5 @@
obj-$(CONFIG_SYS_MTDPARTS_RUNTIME) += stm32mp_mtdparts.o
obj-$(CONFIG_SET_DFU_ALT_INFO) += stm32mp_dfu.o
endif
+
+obj-$(CONFIG_TYPEC_STUSB160X) += stusb160x.o
diff --git a/board/st/common/stusb160x.c b/board/st/common/stusb160x.c
new file mode 100644
index 0000000..f1197f9
--- /dev/null
+++ b/board/st/common/stusb160x.c
@@ -0,0 +1,46 @@
+// SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause
+/*
+ * STMicroelectronics STUSB Type-C controller driver
+ * based on Linux drivers/usb/typec/stusb160x.c
+ *
+ * Copyright (C) 2020, STMicroelectronics - All Rights Reserved
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <i2c.h>
+
+/* REGISTER */
+#define STUSB160X_CC_CONNECTION_STATUS 0x0E
+
+/* STUSB160X_CC_CONNECTION_STATUS bitfields */
+#define STUSB160X_CC_ATTACH BIT(0)
+
+int stusb160x_cable_connected(void)
+{
+ struct udevice *dev;
+ int ret;
+
+ ret = uclass_get_device_by_driver(UCLASS_I2C_GENERIC,
+ DM_GET_DRIVER(stusb160x),
+ &dev);
+ if (ret < 0)
+ return ret;
+
+ ret = dm_i2c_reg_read(dev, STUSB160X_CC_CONNECTION_STATUS);
+ if (ret < 0)
+ return 0;
+
+ return ret & STUSB160X_CC_ATTACH;
+}
+
+static const struct udevice_id stusb160x_ids[] = {
+ { .compatible = "st,stusb1600" },
+ {}
+};
+
+U_BOOT_DRIVER(stusb160x) = {
+ .name = "stusb160x",
+ .id = UCLASS_I2C_GENERIC,
+ .of_match = stusb160x_ids,
+};
diff --git a/board/st/common/stusb160x.h b/board/st/common/stusb160x.h
new file mode 100644
index 0000000..fe39840
--- /dev/null
+++ b/board/st/common/stusb160x.h
@@ -0,0 +1,10 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2020, STMicroelectronics
+ */
+
+#ifdef CONFIG_TYPEC_STUSB160X
+int stusb160x_cable_connected(void);
+#else
+int stusb160x_cable_connected(void) { return -ENODEV; }
+#endif