Added debug statements

diff --git a/src/drivers/nvs/spi.c b/src/drivers/nvs/spi.c
index a4e6868..a5bd46a 100644 (file)
--- a/src/drivers/nvs/spi.c
+++ b/src/drivers/nvs/spi.c
@@ -85,8 +85,16 @@ int spi_read ( struct nvs_device *nvs, unsigned int address,
        struct spi_bus *bus = device->bus;
        unsigned int command = spi_command ( SPI_READ, address,
                                             device->munge_address );
+       int rc;
+
+       DBG ( "SPI %p reading %d bytes from %#04x\n", device, len, address );
+       if ( ( rc = bus->rw ( bus, device, command, address,
+                             NULL, data, len ) ) != 0 ) {
+               DBG ( "SPI %p failed to read data from device\n", device );
+               return rc;
+       }
 
-       return bus->rw ( bus, device, command, address, NULL, data, len );
+       return 0;
 }
 
 /**
@@ -106,16 +114,24 @@ int spi_write ( struct nvs_device *nvs, unsigned int address,
                                             device->munge_address );
        int rc;
 
+       DBG ( "SPI %p writing %d bytes to %#04x\n", device, len, address );
+
        if ( ( rc = bus->rw ( bus, device, SPI_WREN, -1,
-                             NULL, NULL, 0 ) ) != 0 )
+                             NULL, NULL, 0 ) ) != 0 ) {
+               DBG ( "SPI %p failed to write-enable device\n", device );
                return rc;
+       }
 
        if ( ( rc = bus->rw ( bus, device, command, address,
-                             data, NULL, len ) ) != 0 )
+                             data, NULL, len ) ) != 0 ) {
+               DBG ( "SPI %p failed to write data to device\n", device );
                return rc;
+       }
        
-       if ( ( rc = spi_wait ( device ) ) != 0 )
+       if ( ( rc = spi_wait ( device ) ) != 0 ) {
+               DBG ( "SPI %p failed to complete write operation\n", device );
                return rc;
+       }
 
        return 0;
 }