[PATCH v4 04/13] spi: dw: Use generic function to read reg address

[Sean Anderson]

Using an fdt-specific function causes problems when compiled with a live
tree.

Signed-off-by: Sean Anderson <seanga2 at gmail.com>
Tested-by Eugeniy Paltsev <Eugeniy.Paltsev at synopsys.com>
---
This patch was previously part of
https://patchwork.ozlabs.org/project/uboot/list/?series=161576

(no changes since v1)

 drivers/spi/designware_spi.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/spi/designware_spi.c b/drivers/spi/designware_spi.c
index 32de33f695..e8ba80ef41 100644
--- a/drivers/spi/designware_spi.c
+++ b/drivers/spi/designware_spi.c
@@ -160,6 +160,8 @@ static int dw_spi_ofdata_to_platdata(struct udevice *bus)
 	struct dw_spi_platdata *plat = bus->platdata;
 
 	plat->regs = dev_read_addr_ptr(bus);
+	if (!plat->regs)
+		return -EINVAL;
 
 	/* Use 500KHz as a suitable default */
 	plat->frequency = dev_read_u32_default(bus, "spi-max-frequency",
-- 
2.28.0