diff options
| author | Lorenzo Bianconi <lorenzo.bianconi@redhat.com> | 2018-07-28 10:19:13 +0200 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2018-08-01 15:50:24 +0200 |
| commit | 304d34360b099020a12af2abb7e1ac506f4ba16d (patch) | |
| tree | 895183b4b3325dd53340300697a0484282d7bed6 /drivers/spi/spi-bitbang.c | |
| parent | spi: add SPI controller driver for UniPhier SoC (diff) | |
| download | linux-304d34360b099020a12af2abb7e1ac506f4ba16d.tar.xz linux-304d34360b099020a12af2abb7e1ac506f4ba16d.zip | |
spi: add flags parameter to txrx_word function pointers
Add the capability to specify the flag parameter used in
bitbang_txrx_be_cpha{0,1} through the txrx_word function pointers of
spi_bitbang data structure. That feature will be used to add spi-3wire
support to the spi-gpio controller
Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi@redhat.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/spi/spi-bitbang.c')
| -rw-r--r-- | drivers/spi/spi-bitbang.c | 34 |
1 files changed, 21 insertions, 13 deletions
diff --git a/drivers/spi/spi-bitbang.c b/drivers/spi/spi-bitbang.c index 3aa9e6e3dac8..76f1b534bdd7 100644 --- a/drivers/spi/spi-bitbang.c +++ b/drivers/spi/spi-bitbang.c @@ -49,22 +49,26 @@ struct spi_bitbang_cs { unsigned nsecs; /* (clock cycle time)/2 */ u32 (*txrx_word)(struct spi_device *spi, unsigned nsecs, - u32 word, u8 bits); + u32 word, u8 bits, unsigned flags); unsigned (*txrx_bufs)(struct spi_device *, u32 (*txrx_word)( struct spi_device *spi, unsigned nsecs, - u32 word, u8 bits), - unsigned, struct spi_transfer *); + u32 word, u8 bits, + unsigned flags), + unsigned, struct spi_transfer *, + unsigned); }; static unsigned bitbang_txrx_8( struct spi_device *spi, u32 (*txrx_word)(struct spi_device *spi, unsigned nsecs, - u32 word, u8 bits), + u32 word, u8 bits, + unsigned flags), unsigned ns, - struct spi_transfer *t + struct spi_transfer *t, + unsigned flags ) { unsigned bits = t->bits_per_word; unsigned count = t->len; @@ -76,7 +80,7 @@ static unsigned bitbang_txrx_8( if (tx) word = *tx++; - word = txrx_word(spi, ns, word, bits); + word = txrx_word(spi, ns, word, bits, flags); if (rx) *rx++ = word; count -= 1; @@ -88,9 +92,11 @@ static unsigned bitbang_txrx_16( struct spi_device *spi, u32 (*txrx_word)(struct spi_device *spi, unsigned nsecs, - u32 word, u8 bits), + u32 word, u8 bits, + unsigned flags), unsigned ns, - struct spi_transfer *t + struct spi_transfer *t, + unsigned flags ) { unsigned bits = t->bits_per_word; unsigned count = t->len; @@ -102,7 +108,7 @@ static unsigned bitbang_txrx_16( if (tx) word = *tx++; - word = txrx_word(spi, ns, word, bits); + word = txrx_word(spi, ns, word, bits, flags); if (rx) *rx++ = word; count -= 2; @@ -114,9 +120,11 @@ static unsigned bitbang_txrx_32( struct spi_device *spi, u32 (*txrx_word)(struct spi_device *spi, unsigned nsecs, - u32 word, u8 bits), + u32 word, u8 bits, + unsigned flags), unsigned ns, - struct spi_transfer *t + struct spi_transfer *t, + unsigned flags ) { unsigned bits = t->bits_per_word; unsigned count = t->len; @@ -128,7 +136,7 @@ static unsigned bitbang_txrx_32( if (tx) word = *tx++; - word = txrx_word(spi, ns, word, bits); + word = txrx_word(spi, ns, word, bits, flags); if (rx) *rx++ = word; count -= 4; @@ -236,7 +244,7 @@ static int spi_bitbang_bufs(struct spi_device *spi, struct spi_transfer *t) struct spi_bitbang_cs *cs = spi->controller_state; unsigned nsecs = cs->nsecs; - return cs->txrx_bufs(spi, cs->txrx_word, nsecs, t); + return cs->txrx_bufs(spi, cs->txrx_word, nsecs, t, 0); } /*----------------------------------------------------------------------*/ |