1 /* 2 * Copyright (c) 2015 Google, Inc 3 * Written by Simon Glass <sjg@chromium.org> 4 * 5 * SPDX-License-Identifier: GPL-2.0+ 6 */ 7 8 #include <common.h> 9 #include <dm.h> 10 #include <cros_ec.h> 11 #include <errno.h> 12 #include <i2c.h> 13 14 DECLARE_GLOBAL_DATA_PTR; 15 16 struct cros_ec_i2c_bus { 17 int remote_bus; 18 }; 19 20 static int cros_ec_i2c_set_bus_speed(struct udevice *dev, unsigned int speed) 21 { 22 return 0; 23 } 24 25 static int cros_ec_i2c_xfer(struct udevice *dev, struct i2c_msg *msg, 26 int nmsgs) 27 { 28 struct cros_ec_i2c_bus *i2c_bus = dev_get_priv(dev); 29 30 return cros_ec_i2c_tunnel(dev->parent, i2c_bus->remote_bus, msg, nmsgs); 31 } 32 33 static int cros_ec_i2c_ofdata_to_platdata(struct udevice *dev) 34 { 35 struct cros_ec_i2c_bus *i2c_bus = dev_get_priv(dev); 36 const void *blob = gd->fdt_blob; 37 int node = dev->of_offset; 38 39 i2c_bus->remote_bus = fdtdec_get_uint(blob, node, "google,remote-bus", 40 0); 41 42 return 0; 43 } 44 45 static const struct dm_i2c_ops cros_ec_i2c_ops = { 46 .xfer = cros_ec_i2c_xfer, 47 .set_bus_speed = cros_ec_i2c_set_bus_speed, 48 }; 49 50 static const struct udevice_id cros_ec_i2c_ids[] = { 51 { .compatible = "google,cros-ec-i2c-tunnel" }, 52 { } 53 }; 54 55 U_BOOT_DRIVER(cros_ec_tunnel) = { 56 .name = "cros_ec_tunnel", 57 .id = UCLASS_I2C, 58 .of_match = cros_ec_i2c_ids, 59 .ofdata_to_platdata = cros_ec_i2c_ofdata_to_platdata, 60 .priv_auto_alloc_size = sizeof(struct cros_ec_i2c_bus), 61 .ops = &cros_ec_i2c_ops, 62 }; 63