int dm_spi_claim_bus(struct udevice *dev)
{
struct udevice *bus = dev->parent;
struct dm_spi_ops *ops = spi_get_ops(bus);
struct dm_spi_bus *spi = dev_get_uclass_priv(bus);
struct spi_slave *slave = dev_get_parent_priv(dev);
int speed;
int ret;
speed = slave->max_hz;
if (spi->max_hz) {
if (speed)
speed = min(speed, (int)spi->max_hz);
else
speed = spi->max_hz;
}
if (!speed)
speed = 100000;
if (speed != slave->speed) {
ret = spi_set_speed_mode(bus, speed, slave->mode);
if (ret)
return ret;
slave->speed = speed;
}
return ops->claim_bus ? ops->claim_bus(dev) : 0;
}
int spi_claim_bus(struct spi_slave *slave)
{
struct udevice *dev = slave->dev;
struct udevice *bus = dev->parent;
struct dm_spi_ops *ops = spi_get_ops(bus);
struct dm_spi_bus *spi = bus->uclass_priv;
int speed;
int ret;
speed = slave->max_hz;
if (spi->max_hz) {
if (speed)
speed = min(speed, (int)spi->max_hz);
else
speed = spi->max_hz;
}
if (!speed)
speed = 100000;
ret = spi_set_speed_mode(bus, speed, slave->mode);
if (ret)
return ret;
return ops->claim_bus ? ops->claim_bus(bus) : 0;
}
int spi_get_bus_and_cs(int busnum, int cs, int speed, int mode,
const char *drv_name, const char *dev_name,
struct udevice **busp, struct spi_slave **devp)
{
struct udevice *bus, *dev;
struct dm_spi_slave_platdata *plat;
bool created = false;
int ret;
ret = uclass_get_device_by_seq(UCLASS_SPI, busnum, &bus);
if (ret) {
printf("Invalid bus %d (err=%d)\n", busnum, ret);
return ret;
}
ret = spi_find_chip_select(bus, cs, &dev);
/*
* If there is no such device, create one automatically. This means
* that we don't need a device tree node or platform data for the
* SPI flash chip - we will bind to the correct driver.
*/
if (ret == -ENODEV && drv_name) {
debug("%s: Binding new device '%s', busnum=%d, cs=%d, driver=%s\n",
__func__, dev_name, busnum, cs, drv_name);
ret = device_bind_driver(bus, drv_name, dev_name, &dev);
if (ret)
return ret;
plat = dev_get_parent_platdata(dev);
plat->cs = cs;
plat->max_hz = speed;
plat->mode = mode;
created = true;
} else if (ret) {
printf("Invalid chip select %d:%d (err=%d)\n", busnum, cs,
ret);
return ret;
}
if (!device_active(dev)) {
struct spi_slave *slave;
ret = device_probe(dev);
if (ret)
goto err;
slave = dev_get_parent_priv(dev);
slave->dev = dev;
}
plat = dev_get_parent_platdata(dev);
if (!speed) {
speed = plat->max_hz;
mode = plat->mode;
}
ret = spi_set_speed_mode(bus, speed, mode);
if (ret)
goto err;
*busp = bus;
*devp = dev_get_parent_priv(dev);
debug("%s: bus=%p, slave=%p\n", __func__, bus, *devp);
return 0;
err:
debug("%s: Error path, created=%d, device '%s'\n", __func__,
created, dev->name);
if (created) {
device_remove(dev);
device_unbind(dev);
}
return ret;
}
