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path: root/drivers/spi/spi-uclass.c
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Diffstat (limited to 'drivers/spi/spi-uclass.c')
-rw-r--r--drivers/spi/spi-uclass.c83
1 files changed, 49 insertions, 34 deletions
diff --git a/drivers/spi/spi-uclass.c b/drivers/spi/spi-uclass.c
index 2c134eb39f..63a6217cc6 100644
--- a/drivers/spi/spi-uclass.c
+++ b/drivers/spi/spi-uclass.c
@@ -98,11 +98,21 @@ int spi_post_bind(struct udevice *dev)
return dm_scan_fdt_node(dev, gd->fdt_blob, dev->of_offset, false);
}
-int spi_post_probe(struct udevice *dev)
+int spi_child_post_bind(struct udevice *dev)
{
- struct dm_spi_bus *spi = dev->uclass_priv;
+ struct dm_spi_slave_platdata *plat = dev_get_parent_platdata(dev);
- spi->max_hz = fdtdec_get_int(gd->fdt_blob, dev->of_offset,
+ if (dev->of_offset == -1)
+ return 0;
+
+ return spi_slave_ofdata_to_platdata(gd->fdt_blob, dev->of_offset, plat);
+}
+
+int spi_post_probe(struct udevice *bus)
+{
+ struct dm_spi_bus *spi = bus->uclass_priv;
+
+ spi->max_hz = fdtdec_get_int(gd->fdt_blob, bus->of_offset,
"spi-max-frequency", 0);
return 0;
@@ -110,18 +120,29 @@ int spi_post_probe(struct udevice *dev)
int spi_child_pre_probe(struct udevice *dev)
{
+ struct dm_spi_slave_platdata *plat = dev_get_parent_platdata(dev);
struct spi_slave *slave = dev_get_parentdata(dev);
+ /*
+ * This is needed because we pass struct spi_slave around the place
+ * instead slave->dev (a struct udevice). So we have to have some
+ * way to access the slave udevice given struct spi_slave. Once we
+ * change the SPI API to use udevice instead of spi_slave, we can
+ * drop this.
+ */
slave->dev = dev;
+ slave->max_hz = plat->max_hz;
+ slave->mode = plat->mode;
+
return 0;
}
int spi_chip_select(struct udevice *dev)
{
- struct spi_slave *slave = dev_get_parentdata(dev);
+ struct dm_spi_slave_platdata *plat = dev_get_parent_platdata(dev);
- return slave ? slave->cs : -ENOENT;
+ return plat ? plat->cs : -ENOENT;
}
int spi_find_chip_select(struct udevice *bus, int cs, struct udevice **devp)
@@ -130,17 +151,11 @@ int spi_find_chip_select(struct udevice *bus, int cs, struct udevice **devp)
for (device_find_first_child(bus, &dev); dev;
device_find_next_child(&dev)) {
- struct spi_slave store;
- struct spi_slave *slave = dev_get_parentdata(dev);
+ struct dm_spi_slave_platdata *plat;
- if (!slave) {
- slave = &store;
- spi_ofdata_to_platdata(gd->fdt_blob, dev->of_offset,
- slave);
- }
- debug("%s: slave=%p, cs=%d\n", __func__, slave,
- slave ? slave->cs : -1);
- if (slave && slave->cs == cs) {
+ plat = dev_get_parent_platdata(dev);
+ debug("%s: plat=%p, cs=%d\n", __func__, plat, plat->cs);
+ if (plat->cs == cs) {
*devp = dev;
return 0;
}
@@ -224,7 +239,6 @@ int spi_get_bus_and_cs(int busnum, int cs, int speed, int mode,
struct udevice **busp, struct spi_slave **devp)
{
struct udevice *bus, *dev;
- struct spi_slave *slave;
bool created = false;
int ret;
@@ -241,11 +255,17 @@ int spi_get_bus_and_cs(int busnum, int cs, int speed, int mode,
* SPI flash chip - we will bind to the correct driver.
*/
if (ret == -ENODEV && drv_name) {
+ struct dm_spi_slave_platdata *plat;
+
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,
@@ -254,23 +274,13 @@ int spi_get_bus_and_cs(int busnum, int cs, int speed, int mode,
}
if (!device_active(dev)) {
- slave = (struct spi_slave *)calloc(1,
- sizeof(struct spi_slave));
- if (!slave) {
- ret = -ENOMEM;
- goto err;
- }
+ struct spi_slave *slave;
- ret = spi_ofdata_to_platdata(gd->fdt_blob, dev->of_offset,
- slave);
+ ret = device_probe(dev);
if (ret)
goto err;
- slave->cs = cs;
+ slave = dev_get_parentdata(dev);
slave->dev = dev;
- ret = device_probe_child(dev, slave);
- free(slave);
- if (ret)
- goto err;
}
ret = spi_set_speed_mode(bus, speed, mode);
@@ -284,6 +294,8 @@ int spi_get_bus_and_cs(int busnum, int cs, int speed, int mode,
return 0;
err:
+ debug("%s: Error path, credted=%d, device '%s'\n", __func__,
+ created, dev->name);
if (created) {
device_remove(dev);
device_unbind(dev);
@@ -330,13 +342,13 @@ void spi_free_slave(struct spi_slave *slave)
slave->dev = NULL;
}
-int spi_ofdata_to_platdata(const void *blob, int node,
- struct spi_slave *spi)
+int spi_slave_ofdata_to_platdata(const void *blob, int node,
+ struct dm_spi_slave_platdata *plat)
{
int mode = 0;
- spi->cs = fdtdec_get_int(blob, node, "reg", -1);
- spi->max_hz = fdtdec_get_int(blob, node, "spi-max-frequency", 0);
+ plat->cs = fdtdec_get_int(blob, node, "reg", -1);
+ plat->max_hz = fdtdec_get_int(blob, node, "spi-max-frequency", 0);
if (fdtdec_get_bool(blob, node, "spi-cpol"))
mode |= SPI_CPOL;
if (fdtdec_get_bool(blob, node, "spi-cpha"))
@@ -345,7 +357,7 @@ int spi_ofdata_to_platdata(const void *blob, int node,
mode |= SPI_CS_HIGH;
if (fdtdec_get_bool(blob, node, "spi-half-duplex"))
mode |= SPI_PREAMBLE;
- spi->mode = mode;
+ plat->mode = mode;
return 0;
}
@@ -359,6 +371,9 @@ UCLASS_DRIVER(spi) = {
.child_pre_probe = spi_child_pre_probe,
.per_device_auto_alloc_size = sizeof(struct dm_spi_bus),
.per_child_auto_alloc_size = sizeof(struct spi_slave),
+ .per_child_platdata_auto_alloc_size =
+ sizeof(struct dm_spi_slave_platdata),
+ .child_post_bind = spi_child_post_bind,
};
UCLASS_DRIVER(spi_generic) = {
generated by cgit (git 2.34.1) at 2024-12-25 19:12:08 +0000