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Diffstat (limited to 'drivers/spi')
-rw-r--r--drivers/spi/spi_bitbang.c10
1 files changed, 6 insertions, 4 deletions
diff --git a/drivers/spi/spi_bitbang.c b/drivers/spi/spi_bitbang.c
index 0525c99118c..6c3da64d609 100644
--- a/drivers/spi/spi_bitbang.c
+++ b/drivers/spi/spi_bitbang.c
@@ -138,8 +138,7 @@ static unsigned bitbang_txrx_32(
return t->len - count;
}
-static int
-bitbang_transfer_setup(struct spi_device *spi, struct spi_transfer *t)
+int spi_bitbang_setup_transfer(struct spi_device *spi, struct spi_transfer *t)
{
struct spi_bitbang_cs *cs = spi->controller_state;
u8 bits_per_word;
@@ -174,6 +173,7 @@ bitbang_transfer_setup(struct spi_device *spi, struct spi_transfer *t)
return 0;
}
+EXPORT_SYMBOL_GPL(spi_bitbang_setup_transfer);
/**
* spi_bitbang_setup - default setup for per-word I/O loops
@@ -203,7 +203,7 @@ int spi_bitbang_setup(struct spi_device *spi)
if (!cs->txrx_word)
return -EINVAL;
- retval = bitbang_transfer_setup(spi, NULL);
+ retval = spi_bitbang_setup_transfer(spi, NULL);
if (retval < 0)
return retval;
@@ -454,7 +454,9 @@ int spi_bitbang_start(struct spi_bitbang *bitbang)
bitbang->use_dma = 0;
bitbang->txrx_bufs = spi_bitbang_bufs;
if (!bitbang->master->setup) {
- bitbang->setup_transfer = bitbang_transfer_setup;
+ if (!bitbang->setup_transfer)
+ bitbang->setup_transfer =
+ spi_bitbang_setup_transfer;
bitbang->master->setup = spi_bitbang_setup;
bitbang->master->cleanup = spi_bitbang_cleanup;
}