83d290c56f
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
76 lines
1.6 KiB
C
76 lines
1.6 KiB
C
// 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>
|
|
#include <power/tps65090.h>
|
|
|
|
static int cros_ec_ldo_set_bus_speed(struct udevice *dev, unsigned int speed)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int cros_ec_ldo_xfer(struct udevice *dev, struct i2c_msg *msg,
|
|
int nmsgs)
|
|
{
|
|
bool is_read = nmsgs > 1;
|
|
int fet_id, ret;
|
|
|
|
/*
|
|
* Look for reads and writes of the LDO registers. In either case the
|
|
* first message is a write with the register number as the first byte.
|
|
*/
|
|
if (!nmsgs || !msg->len || (msg->flags & I2C_M_RD)) {
|
|
debug("%s: Invalid message\n", __func__);
|
|
goto err;
|
|
}
|
|
|
|
fet_id = msg->buf[0] - REG_FET_BASE;
|
|
if (fet_id < 1 || fet_id > MAX_FET_NUM) {
|
|
debug("%s: Invalid FET %d\n", __func__, fet_id);
|
|
goto err;
|
|
}
|
|
|
|
if (is_read) {
|
|
uint8_t state;
|
|
|
|
ret = cros_ec_get_ldo(dev->parent, fet_id, &state);
|
|
if (!ret)
|
|
msg[1].buf[0] = state ?
|
|
FET_CTRL_ENFET | FET_CTRL_PGFET : 0;
|
|
} else {
|
|
bool on = msg->buf[1] & FET_CTRL_ENFET;
|
|
|
|
ret = cros_ec_set_ldo(dev->parent, fet_id, on);
|
|
}
|
|
|
|
return ret;
|
|
|
|
err:
|
|
/* Indicate that the message is unimplemented */
|
|
return -ENOSYS;
|
|
}
|
|
|
|
static const struct dm_i2c_ops cros_ec_i2c_ops = {
|
|
.xfer = cros_ec_ldo_xfer,
|
|
.set_bus_speed = cros_ec_ldo_set_bus_speed,
|
|
};
|
|
|
|
static const struct udevice_id cros_ec_i2c_ids[] = {
|
|
{ .compatible = "google,cros-ec-ldo-tunnel" },
|
|
{ }
|
|
};
|
|
|
|
U_BOOT_DRIVER(cros_ec_ldo) = {
|
|
.name = "cros_ec_ldo_tunnel",
|
|
.id = UCLASS_I2C,
|
|
.of_match = cros_ec_i2c_ids,
|
|
.ops = &cros_ec_i2c_ops,
|
|
};
|