diff options
| author | Jan Glauber <jglauber@cavium.com> | 2016-07-23 12:42:51 +0200 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2016-07-24 21:54:29 +0100 |
| commit | b9e64763b68dbbf87a54b28edf89cd92c8ef51dd (patch) | |
| tree | 15f40ec53818b06d9b000cde89211c101b9202fd /drivers/spi/spi-octeon.c | |
| parent | 187fc9b37458547e198eaf9af4b33c56999748ad (diff) | |
| download | lwn-b9e64763b68dbbf87a54b28edf89cd92c8ef51dd.tar.gz lwn-b9e64763b68dbbf87a54b28edf89cd92c8ef51dd.zip | |
spi: octeon: Store system clock freqency in struct octeon_spi
Storing the system clock frequency in struct octeon_spi avoids
calling the MIPS specific octeon_get_io_clock_rate() for every transfer.
Signed-off-by: Jan Glauber <jglauber@cavium.com>
Tested-by: Steven J. Hill <steven.hill@cavium.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/spi/spi-octeon.c')
| -rw-r--r-- | drivers/spi/spi-octeon.c | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/drivers/spi/spi-octeon.c b/drivers/spi/spi-octeon.c index b53ba530a1c8..e72204089a88 100644 --- a/drivers/spi/spi-octeon.c +++ b/drivers/spi/spi-octeon.c @@ -30,6 +30,7 @@ struct octeon_spi { void __iomem *register_base; u64 last_cfg; u64 cs_enax; + int sys_freq; }; static void octeon_spi_wait_ready(struct octeon_spi *p) @@ -53,7 +54,6 @@ static int octeon_spi_do_transfer(struct octeon_spi *p, union cvmx_mpi_cfg mpi_cfg; union cvmx_mpi_tx mpi_tx; unsigned int clkdiv; - unsigned int speed_hz; int mode; bool cpha, cpol; const u8 *tx_buf; @@ -65,9 +65,7 @@ static int octeon_spi_do_transfer(struct octeon_spi *p, cpha = mode & SPI_CPHA; cpol = mode & SPI_CPOL; - speed_hz = xfer->speed_hz; - - clkdiv = octeon_get_io_clock_rate() / (2 * speed_hz); + clkdiv = p->sys_freq / (2 * xfer->speed_hz); mpi_cfg.u64 = 0; @@ -194,6 +192,7 @@ static int octeon_spi_probe(struct platform_device *pdev) } p->register_base = reg_base; + p->sys_freq = octeon_get_io_clock_rate(); master->num_chipselect = 4; master->mode_bits = SPI_CPHA | |