GK SDK 源码库: XMIPCLinuxV100R005C00SPC030 (kernel/tools/open_source excluded)

source/bootloader/u-boot-2020.01/drivers/i2c/cros_ec_tunnel.c

@@ -0,0 +1,61 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (c) 2015 Google, Inc
+ * Written by Simon Glass <sjg@chromium.org>
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <cros_ec.h>
+#include <errno.h>
+#include <i2c.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+struct cros_ec_i2c_bus {
+	int remote_bus;
+};
+
+static int cros_ec_i2c_set_bus_speed(struct udevice *dev, unsigned int speed)
+{
+	return 0;
+}
+
+static int cros_ec_i2c_xfer(struct udevice *dev, struct i2c_msg *msg,
+			    int nmsgs)
+{
+	struct cros_ec_i2c_bus *i2c_bus = dev_get_priv(dev);
+
+	return cros_ec_i2c_tunnel(dev->parent, i2c_bus->remote_bus, msg, nmsgs);
+}
+
+static int cros_ec_i2c_ofdata_to_platdata(struct udevice *dev)
+{
+	struct cros_ec_i2c_bus *i2c_bus = dev_get_priv(dev);
+	const void *blob = gd->fdt_blob;
+	int node = dev_of_offset(dev);
+
+	i2c_bus->remote_bus = fdtdec_get_uint(blob, node, "google,remote-bus",
+					      0);
+
+	return 0;
+}
+
+static const struct dm_i2c_ops cros_ec_i2c_ops = {
+	.xfer		= cros_ec_i2c_xfer,
+	.set_bus_speed	= cros_ec_i2c_set_bus_speed,
+};
+
+static const struct udevice_id cros_ec_i2c_ids[] = {
+	{ .compatible = "google,cros-ec-i2c-tunnel" },
+	{ }
+};
+
+U_BOOT_DRIVER(cros_ec_tunnel) = {
+	.name	= "cros_ec_tunnel",
+	.id	= UCLASS_I2C,
+	.of_match = cros_ec_i2c_ids,
+	.ofdata_to_platdata = cros_ec_i2c_ofdata_to_platdata,
+	.priv_auto_alloc_size = sizeof(struct cros_ec_i2c_bus),
+	.ops	= &cros_ec_i2c_ops,
+};