spi: Add of-platdata support to SPI and SPI flash

Some boards may want to use these subsystems with of-platdata in SPL. Add
support for this by avoiding any device tree access in this case.

Signed-off-by: Simon Glass <sjg@chromium.org>

drivers/mtd/spi/spi_flash.c

@@ -1138,7 +1138,7 @@ int spi_flash_scan(struct spi_flash *flash)
 		return ret;
 #endif
 
-#if CONFIG_IS_ENABLED(OF_CONTROL)
+#if CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)
 	ret = spi_flash_decode_fdt(gd->fdt_blob, flash);
 	if (ret) {
 		debug("SF: FDT decode error\n");

drivers/spi/spi-uclass.c

@@ -108,6 +108,7 @@ int spi_xfer(struct spi_slave *slave, unsigned int bitlen,
 	return dm_spi_xfer(slave->dev, bitlen, dout, din, flags);
 }
 
+#if !CONFIG_IS_ENABLED(OF_PLATDATA)
 static int spi_child_post_bind(struct udevice *dev)
 {
 	struct dm_spi_slave_platdata *plat = dev_get_parent_platdata(dev);
@@ -117,14 +118,16 @@ static int spi_child_post_bind(struct udevice *dev)
 
 	return spi_slave_ofdata_to_platdata(gd->fdt_blob, dev->of_offset, plat);
 }
+#endif
 
 static int spi_post_probe(struct udevice *bus)
 {
+#if !CONFIG_IS_ENABLED(OF_PLATDATA)
 	struct dm_spi_bus *spi = dev_get_uclass_priv(bus);
 
 	spi->max_hz = fdtdec_get_int(gd->fdt_blob, bus->of_offset,
 				     "spi-max-frequency", 0);
-
+#endif
 #if defined(CONFIG_NEEDS_MANUAL_RELOC)
 	struct dm_spi_ops *ops = spi_get_ops(bus);
 
@@ -274,7 +277,11 @@ int spi_get_bus_and_cs(int busnum, int cs, int speed, int mode,
 	bool created = false;
 	int ret;
 
+#if CONFIG_IS_ENABLED(OF_PLATDATA)
+	ret = uclass_first_device_err(UCLASS_SPI, &bus);
+#else
 	ret = uclass_get_device_by_seq(UCLASS_SPI, busnum, &bus);
+#endif
 	if (ret) {
 		printf("Invalid bus %d (err=%d)\n", busnum, ret);
 		return ret;
@@ -436,14 +443,18 @@ UCLASS_DRIVER(spi) = {
 	.id		= UCLASS_SPI,
 	.name		= "spi",
 	.flags		= DM_UC_FLAG_SEQ_ALIAS,
+#if !CONFIG_IS_ENABLED(OF_PLATDATA)
 	.post_bind	= dm_scan_fdt_dev,
+#endif
 	.post_probe	= spi_post_probe,
 	.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),
+#if !CONFIG_IS_ENABLED(OF_PLATDATA)
 	.child_post_bind = spi_child_post_bind,
+#endif
 };
 
 UCLASS_DRIVER(spi_generic) = {