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d678a59d2d
When bringing in the series 'arm: dts: am62-beagleplay: Fix Beagleplay Ethernet"' I failed to notice that b4 noticed it was based on next and so took that as the base commit and merged that part of next to master. This reverts commitc8ffd1356d, reversing changes made to2ee6f3a5f7. Reported-by: Jonas Karlman <jonas@kwiboo.se> 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+
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/*
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* Copyright (c) 2015 Google, Inc
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* Written by Simon Glass <sjg@chromium.org>
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*/
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#include <common.h>
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#include <dm.h>
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#include <cros_ec.h>
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#include <errno.h>
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#include <i2c.h>
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#include <log.h>
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#include <power/tps65090.h>
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static int cros_ec_ldo_set_bus_speed(struct udevice *dev, unsigned int speed)
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{
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return 0;
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}
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static int cros_ec_ldo_xfer(struct udevice *dev, struct i2c_msg *msg,
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int nmsgs)
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{
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bool is_read = nmsgs > 1;
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int fet_id, ret;
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/*
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* Look for reads and writes of the LDO registers. In either case the
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* first message is a write with the register number as the first byte.
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*/
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if (!nmsgs || !msg->len || (msg->flags & I2C_M_RD)) {
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debug("%s: Invalid message\n", __func__);
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goto err;
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}
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fet_id = msg->buf[0] - REG_FET_BASE;
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if (fet_id < 1 || fet_id > MAX_FET_NUM) {
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debug("%s: Invalid FET %d\n", __func__, fet_id);
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goto err;
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}
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if (is_read) {
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uint8_t state;
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ret = cros_ec_get_ldo(dev->parent, fet_id, &state);
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if (!ret)
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msg[1].buf[0] = state ?
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FET_CTRL_ENFET | FET_CTRL_PGFET : 0;
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} else {
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bool on = msg->buf[1] & FET_CTRL_ENFET;
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ret = cros_ec_set_ldo(dev->parent, fet_id, on);
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}
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return ret;
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err:
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/* Indicate that the message is unimplemented */
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return -ENOSYS;
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}
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static const struct dm_i2c_ops cros_ec_i2c_ops = {
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.xfer = cros_ec_ldo_xfer,
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.set_bus_speed = cros_ec_ldo_set_bus_speed,
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};
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static const struct udevice_id cros_ec_i2c_ids[] = {
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{ .compatible = "google,cros-ec-ldo-tunnel" },
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{ }
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};
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U_BOOT_DRIVER(cros_ec_ldo) = {
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.name = "cros_ec_ldo_tunnel",
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.id = UCLASS_I2C,
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.of_match = cros_ec_i2c_ids,
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.ops = &cros_ec_i2c_ops,
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};
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