of/spi: Fix SPI module loading by using proper "spi:" modalias prefixes.

To get modprobe to automatically load the proper modules, we need to
prefix things with "spi:".  Partially based on Grant Likely's suggestions.

Signed-off-by: David Daney <david.daney@cavium.com>
[grant.likely: reworked because drivers/of/of_spi.c has been removed]
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>

1 files changed, 4 insertions, 1 deletions

diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c
index ab095acdb2a8..19ee901577da 100644
--- a/drivers/spi/spi.c
+++ b/drivers/spi/spi.c
@@ -824,6 +824,7 @@ static void of_register_spi_devices(struct spi_master *master)
         struct spi_device *spi;
         struct device_node *nc;
         const __be32 *prop;
+        char modalias[SPI_NAME_SIZE + 4];
         int rc;
         int len;
 
@@ -887,7 +888,9 @@ static void of_register_spi_devices(struct spi_master *master)
                 spi->dev.of_node = nc;
 
                 /* Register the new device */
-                request_module(spi->modalias);
+                snprintf(modalias, sizeof(modalias), "%s%s", SPI_MODULE_PREFIX,
+                         spi->modalias);
+                request_module(modalias);
                 rc = spi_add_device(spi);
                 if (rc) {
                         dev_err(&master->dev, "spi_device register error %s\n",