2 * Copyright (c) 2015 Google, Inc
3 * Written by Simon Glass <sjg@chromium.org>
5 * SPDX-License-Identifier: GPL-2.0+
13 #include <power/tps65090.h>
15 static int cros_ec_ldo_set_bus_speed(struct udevice
*dev
, unsigned int speed
)
20 static int cros_ec_ldo_xfer(struct udevice
*dev
, struct i2c_msg
*msg
,
23 bool is_read
= nmsgs
> 1;
27 * Look for reads and writes of the LDO registers. In either case the
28 * first message is a write with the register number as the first byte.
30 if (!nmsgs
|| !msg
->len
|| (msg
->flags
& I2C_M_RD
)) {
31 debug("%s: Invalid message\n", __func__
);
35 fet_id
= msg
->buf
[0] - REG_FET_BASE
;
36 if (fet_id
< 1 || fet_id
> MAX_FET_NUM
) {
37 debug("%s: Invalid FET %d\n", __func__
, fet_id
);
44 ret
= cros_ec_get_ldo(dev
->parent
, fet_id
, &state
);
46 msg
[1].buf
[0] = state
?
47 FET_CTRL_ENFET
| FET_CTRL_PGFET
: 0;
49 bool on
= msg
->buf
[1] & FET_CTRL_ENFET
;
51 ret
= cros_ec_set_ldo(dev
->parent
, fet_id
, on
);
57 /* Indicate that the message is unimplemented */
61 static const struct dm_i2c_ops cros_ec_i2c_ops
= {
62 .xfer
= cros_ec_ldo_xfer
,
63 .set_bus_speed
= cros_ec_ldo_set_bus_speed
,
66 static const struct udevice_id cros_ec_i2c_ids
[] = {
67 { .compatible
= "google,cros-ec-ldo-tunnel" },
71 U_BOOT_DRIVER(cros_ec_ldo
) = {
72 .name
= "cros_ec_ldo_tunnel",
74 .of_match
= cros_ec_i2c_ids
,
75 .ops
= &cros_ec_i2c_ops
,