diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/misc/cros_ec_spi.c | 87 |
1 files changed, 78 insertions, 9 deletions
diff --git a/drivers/misc/cros_ec_spi.c b/drivers/misc/cros_ec_spi.c index 015333f..e403664 100644 --- a/drivers/misc/cros_ec_spi.c +++ b/drivers/misc/cros_ec_spi.c @@ -15,23 +15,34 @@ #include <common.h> #include <cros_ec.h> +#include <dm.h> +#include <errno.h> #include <spi.h> +DECLARE_GLOBAL_DATA_PTR; + +#ifdef CONFIG_DM_CROS_EC +int cros_ec_spi_packet(struct udevice *udev, int out_bytes, int in_bytes) +{ + struct cros_ec_dev *dev = udev->uclass_priv; +#else int cros_ec_spi_packet(struct cros_ec_dev *dev, int out_bytes, int in_bytes) { +#endif + struct spi_slave *slave = dev_get_parentdata(dev->dev); int rv; /* Do the transfer */ - if (spi_claim_bus(dev->spi)) { + if (spi_claim_bus(slave)) { debug("%s: Cannot claim SPI bus\n", __func__); return -1; } - rv = spi_xfer(dev->spi, max(out_bytes, in_bytes) * 8, + rv = spi_xfer(slave, max(out_bytes, in_bytes) * 8, dev->dout, dev->din, SPI_XFER_BEGIN | SPI_XFER_END); - spi_release_bus(dev->spi); + spi_release_bus(slave); if (rv) { debug("%s: Cannot complete SPI transfer\n", __func__); @@ -56,10 +67,19 @@ int cros_ec_spi_packet(struct cros_ec_dev *dev, int out_bytes, int in_bytes) * @param din_len Maximum size of response in bytes * @return number of bytes in response, or -1 on error */ +#ifdef CONFIG_DM_CROS_EC +int cros_ec_spi_command(struct udevice *udev, uint8_t cmd, int cmd_version, + const uint8_t *dout, int dout_len, + uint8_t **dinp, int din_len) +{ + struct cros_ec_dev *dev = udev->uclass_priv; +#else int cros_ec_spi_command(struct cros_ec_dev *dev, uint8_t cmd, int cmd_version, const uint8_t *dout, int dout_len, uint8_t **dinp, int din_len) { +#endif + struct spi_slave *slave = dev_get_parentdata(dev->dev); int in_bytes = din_len + 4; /* status, length, checksum, trailer */ uint8_t *out; uint8_t *p; @@ -92,7 +112,7 @@ int cros_ec_spi_command(struct cros_ec_dev *dev, uint8_t cmd, int cmd_version, */ memset(dev->din, '\0', in_bytes); - if (spi_claim_bus(dev->spi)) { + if (spi_claim_bus(slave)) { debug("%s: Cannot claim SPI bus\n", __func__); return -1; } @@ -113,10 +133,10 @@ int cros_ec_spi_command(struct cros_ec_dev *dev, uint8_t cmd, int cmd_version, p = dev->din + sizeof(int64_t) - 2; len = dout_len + 4; cros_ec_dump_data("out", cmd, out, len); - rv = spi_xfer(dev->spi, max(len, in_bytes) * 8, out, p, + rv = spi_xfer(slave, max(len, in_bytes) * 8, out, p, SPI_XFER_BEGIN | SPI_XFER_END); - spi_release_bus(dev->spi); + spi_release_bus(slave); if (rv) { debug("%s: Cannot complete SPI transfer\n", __func__); @@ -146,6 +166,7 @@ int cros_ec_spi_command(struct cros_ec_dev *dev, uint8_t cmd, int cmd_version, return len; } +#ifndef CONFIG_DM_CROS_EC int cros_ec_spi_decode_fdt(struct cros_ec_dev *dev, const void *blob) { /* Decode interface-specific FDT params */ @@ -165,11 +186,59 @@ int cros_ec_spi_decode_fdt(struct cros_ec_dev *dev, const void *blob) */ int cros_ec_spi_init(struct cros_ec_dev *dev, const void *blob) { - dev->spi = spi_setup_slave_fdt(blob, dev->node, dev->parent_node); - if (!dev->spi) { + int ret; + + ret = spi_setup_slave_fdt(blob, dev->node, dev->parent_node, + &slave); + if (ret) { debug("%s: Could not setup SPI slave\n", __func__); - return -1; + return ret; } return 0; } +#endif + +#ifdef CONFIG_DM_CROS_EC +int cros_ec_probe(struct udevice *dev) +{ + struct spi_slave *slave = dev_get_parentdata(dev); + int ret; + + /* + * TODO(sjg@chromium.org) + * + * This is really horrible at present. It is an artifact of removing + * the child_pre_probe() method for SPI. Everything here could go in + * an automatic function, except that spi_get_bus_and_cs() wants to + * set it up manually and call device_probe_child(). + * + * The solution may be to re-enable the child_pre_probe() method for + * SPI and have it do nothing if the child is already passed in via + * device_probe_child(). + */ + slave->dev = dev; + ret = spi_ofdata_to_platdata(gd->fdt_blob, dev->of_offset, slave); + if (ret) + return ret; + return cros_ec_register(dev); +} + +struct dm_cros_ec_ops cros_ec_ops = { + .packet = cros_ec_spi_packet, + .command = cros_ec_spi_command, +}; + +static const struct udevice_id cros_ec_ids[] = { + { .compatible = "google,cros-ec" }, + { } +}; + +U_BOOT_DRIVER(cros_ec_spi) = { + .name = "cros_ec", + .id = UCLASS_CROS_EC, + .of_match = cros_ec_ids, + .probe = cros_ec_probe, + .ops = &cros_ec_ops, +}; +#endif |