dm: spi: Add logging of some return values

When SPI flash operations fail it is helpful to be able to see the error
codes and where they are generated. Add logging to capture this
information for read operations.

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

drivers/mtd/spi/sf-uclass.c

@@ -14,18 +14,18 @@ DECLARE_GLOBAL_DATA_PTR;
 
 int spi_flash_read_dm(struct udevice *dev, u32 offset, size_t len, void *buf)
 {
-	return sf_get_ops(dev)->read(dev, offset, len, buf);
+	return log_ret(sf_get_ops(dev)->read(dev, offset, len, buf));
 }
 
 int spi_flash_write_dm(struct udevice *dev, u32 offset, size_t len,
 		       const void *buf)
 {
-	return sf_get_ops(dev)->write(dev, offset, len, buf);
+	return log_ret(sf_get_ops(dev)->write(dev, offset, len, buf));
 }
 
 int spi_flash_erase_dm(struct udevice *dev, u32 offset, size_t len)
 {
-	return sf_get_ops(dev)->erase(dev, offset, len);
+	return log_ret(sf_get_ops(dev)->erase(dev, offset, len));
 }
 
 /*

drivers/mtd/spi/sf_probe.c

@@ -97,7 +97,7 @@ static int spi_flash_std_read(struct udevice *dev, u32 offset, size_t len,
 {
 	struct spi_flash *flash = dev_get_uclass_priv(dev);
 
-	return spi_flash_cmd_read_ops(flash, offset, len, buf);
+	return log_ret(spi_flash_cmd_read_ops(flash, offset, len, buf));
 }
 
 static int spi_flash_std_write(struct udevice *dev, u32 offset, size_t len,

drivers/mtd/spi/spi_flash.c

@@ -471,14 +471,14 @@ int spi_flash_cmd_read_ops(struct spi_flash *flash, u32 offset,
 	u8 cmdsz;
 	u32 remain_len, read_len, read_addr;
 	int bank_sel = 0;
-	int ret = -1;
+	int ret = 0;
 
 	/* Handle memory-mapped SPI */
 	if (flash->memory_map) {
 		ret = spi_claim_bus(spi);
 		if (ret) {
 			debug("SF: unable to claim SPI bus\n");
-			return ret;
+			return log_ret(ret);
 		}
 		spi_xfer(spi, 0, NULL, NULL, SPI_XFER_MMAP);
 		spi_flash_copy_mmap(data, flash->memory_map + offset, len);
@@ -501,7 +501,7 @@ int spi_flash_cmd_read_ops(struct spi_flash *flash, u32 offset,
 #ifdef CONFIG_SPI_FLASH_BAR
 		ret = write_bar(flash, read_addr);
 		if (ret < 0)
-			return ret;
+			return log_ret(ret);
 		bank_sel = flash->bank_curr;
 #endif
 		remain_len = ((SPI_FLASH_16MB_BOUN << flash->shift) *
@@ -531,7 +531,7 @@ int spi_flash_cmd_read_ops(struct spi_flash *flash, u32 offset,
 	ret = clean_bar(flash);
 #endif
 
-	return ret;
+	return log_ret(ret);
 }
 
 #ifdef CONFIG_SPI_FLASH_SST

drivers/spi/spi-uclass.c

@@ -63,11 +63,11 @@ int dm_spi_claim_bus(struct udevice *dev)
 		int ret = spi_set_speed_mode(bus, speed, slave->mode);
 
 		if (ret)
-			return ret;
+			return log_ret(ret);
 		slave->speed = speed;
 	}
 
-	return ops->claim_bus ? ops->claim_bus(dev) : 0;
+	return log_ret(ops->claim_bus ? ops->claim_bus(dev) : 0);
 }
 
 void dm_spi_release_bus(struct udevice *dev)
@@ -92,7 +92,7 @@ int dm_spi_xfer(struct udevice *dev, unsigned int bitlen,
 
 int spi_claim_bus(struct spi_slave *slave)
 {
-	return dm_spi_claim_bus(slave->dev);
+	return log_ret(dm_spi_claim_bus(slave->dev));
 }
 
 void spi_release_bus(struct spi_slave *slave)