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spi: bfin-sport: Calculate transfer speed unconditionally 

SPI core validates the transfer speed and defaults to spi->max_speed_hz in
case the transfer speed is not set so code here won't use the
chip->baud value (which is derived from spi->max_speed_hz).

Please note driver uses chip->baud at the beginning of message transmission
by calling the bfin_sport_spi_restore_state() but then programs per
transfer speed in bfin_sport_spi_pump_transfers(). I'm not familiar with
the HW so I don't know would it be possible to remove chip->baud completely
by either using constant value in bfin_sport_spi_restore_state() or by
removing the tclkdiv register write there.

Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Jarkko Nikula 2015-09-15 16:26:16 +03:00 committed by Mark Brown
parent 6ff33f3902
commit 57b48ab49b
1 changed files with 1 additions and 4 deletions
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5
drivers/spi/spi-bfin-sport.c
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@ -352,10 +352,7 @@ bfin_sport_spi_pump_transfers(unsigned long data)
transfer = drv_data->cur_transfer;
chip = drv_data->cur_chip;
if (transfer->speed_hz)
transfer_speed = bfin_sport_hz_to_spi_baud(transfer->speed_hz);
else
transfer_speed = chip->baud;
transfer_speed = bfin_sport_hz_to_spi_baud(transfer->speed_hz);
bfin_write(&drv_data->regs->tclkdiv, transfer_speed);
SSYNC();