+// SPDX-License-Identifier: GPL-2.0+
/*
* Chromium OS cros_ec driver - SPI interface
*
* Copyright (c) 2012 The Chromium OS Authors.
- *
- * SPDX-License-Identifier: GPL-2.0+
*/
/*
#include <cros_ec.h>
#include <dm.h>
#include <errno.h>
+#include <log.h>
#include <spi.h>
-DECLARE_GLOBAL_DATA_PTR;
-
int cros_ec_spi_packet(struct udevice *udev, int out_bytes, int in_bytes)
{
struct cros_ec_dev *dev = dev_get_uclass_priv(udev);
- struct spi_slave *slave = dev_get_parentdata(dev->dev);
+ struct spi_slave *slave = dev_get_parent_priv(dev->dev);
+ ulong start;
+ uint8_t byte;
int rv;
/* Do the transfer */
return -1;
}
- rv = spi_xfer(slave, max(out_bytes, in_bytes) * 8,
- dev->dout, dev->din,
- SPI_XFER_BEGIN | SPI_XFER_END);
+ rv = spi_xfer(slave, out_bytes * 8, dev->dout, NULL, SPI_XFER_BEGIN);
+ if (rv)
+ goto done;
+ start = get_timer(0);
+ while (1) {
+ rv = spi_xfer(slave, 8, NULL, &byte, 0);
+ if (byte == SPI_PREAMBLE_END_BYTE)
+ break;
+ if (rv)
+ goto done;
+ if (get_timer(start) > 100) {
+ rv = -ETIMEDOUT;
+ goto done;
+ }
+ }
+ rv = spi_xfer(slave, in_bytes * 8, NULL, dev->din, 0);
+done:
+ spi_xfer(slave, 0, NULL, NULL, SPI_XFER_END);
spi_release_bus(slave);
if (rv) {
uint8_t **dinp, int din_len)
{
struct cros_ec_dev *dev = dev_get_uclass_priv(udev);
- struct spi_slave *slave = dev_get_parentdata(dev->dev);
+ struct spi_slave *slave = dev_get_parent_priv(dev->dev);
int in_bytes = din_len + 4; /* status, length, checksum, trailer */
uint8_t *out;
uint8_t *p;
};
static const struct udevice_id cros_ec_ids[] = {
- { .compatible = "google,cros-ec" },
+ { .compatible = "google,cros-ec-spi" },
{ }
};
-U_BOOT_DRIVER(cros_ec_spi) = {
- .name = "cros_ec",
+U_BOOT_DRIVER(google_cros_ec_spi) = {
+ .name = "google_cros_ec_spi",
.id = UCLASS_CROS_EC,
.of_match = cros_ec_ids,
.probe = cros_ec_probe,