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authorPatrick Delaunay <patrick.delaunay@st.com>2020-06-29 10:34:06 +0200
committerPatrick Delaunay <patrick.delaunay@st.com>2020-07-07 16:01:23 +0200
commit03fb03842a1e16f89477d4a968712cc2422be217 (patch)
tree419a34f964dfc4aa2d31f89fc74e2c5da89c73cc /board/st/common/stusb160x.c
parentd5d726d3cc47691ace3c68fa31147ad104aaf579 (diff)
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>
Diffstat (limited to 'board/st/common/stusb160x.c')
-rw-r--r--board/st/common/stusb160x.c46
1 files changed, 46 insertions, 0 deletions
diff --git a/board/st/common/stusb160x.c b/board/st/common/stusb160x.c
new file mode 100644
index 0000000000..f1197f9faa
--- /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,
+};