diff options
| author | Xu Yilun <yilun.xu@intel.com> | 2020-06-11 11:25:06 +0800 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2020-06-15 23:36:01 +0100 |
| commit | 3011d314751535782508a86bbd8de415ea99909f (patch) | |
| tree | 032bcba612b8f1af536f39fe80103bf08e3056a6 /drivers/spi/spi-altera.c | |
| parent | 064e8af7159539fc2310870841e7f215b4f633e9 (diff) | |
| download | linux-3011d314751535782508a86bbd8de415ea99909f.tar.bz2 | |
spi: altera: add 32bit data width transfer support.
Add support for 32bit width data register, then it supports 32bit
data width spi slave device and spi transfers.
Signed-off-by: Xu Yilun <yilun.xu@intel.com>
Signed-off-by: Wu Hao <hao.wu@intel.com>
Signed-off-by: Matthew Gerlach <matthew.gerlach@linux.intel.com>
Signed-off-by: Russ Weight <russell.h.weight@intel.com>
Reviewed-by: Tom Rix <trix@redhat.com>
Link: https://lore.kernel.org/r/1591845911-10197-2-git-send-email-yilun.xu@intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/spi/spi-altera.c')
| -rw-r--r-- | drivers/spi/spi-altera.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/spi/spi-altera.c b/drivers/spi/spi-altera.c index 41d71ba7fd32..d5fa0c5706b0 100644 --- a/drivers/spi/spi-altera.c +++ b/drivers/spi/spi-altera.c @@ -86,6 +86,13 @@ static void altera_spi_tx_word(struct altera_spi *hw) txd = (hw->tx[hw->count * 2] | (hw->tx[hw->count * 2 + 1] << 8)); break; + case 4: + txd = (hw->tx[hw->count * 4] + | (hw->tx[hw->count * 4 + 1] << 8) + | (hw->tx[hw->count * 4 + 2] << 16) + | (hw->tx[hw->count * 4 + 3] << 24)); + break; + } } @@ -106,6 +113,13 @@ static void altera_spi_rx_word(struct altera_spi *hw) hw->rx[hw->count * 2] = rxd; hw->rx[hw->count * 2 + 1] = rxd >> 8; break; + case 4: + hw->rx[hw->count * 4] = rxd; + hw->rx[hw->count * 4 + 1] = rxd >> 8; + hw->rx[hw->count * 4 + 2] = rxd >> 16; + hw->rx[hw->count * 4 + 3] = rxd >> 24; + break; + } } |