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