diff options
| author | Gao Pan <pandy.gao@nxp.com> | 2016-11-24 12:04:44 +0100 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2016-11-25 14:04:41 +0100 |
| commit | 3ffa1a5dc696f661754bf145813433fda92371b2 (patch) | |
| tree | 00dadd3ad3a993a6d3c8fe64377ef5262b289a55 /drivers/spi | |
| parent | spi: imx: add devicetree binding for lpspi (diff) | |
| download | linux-3ffa1a5dc696f661754bf145813433fda92371b2.tar.xz linux-3ffa1a5dc696f661754bf145813433fda92371b2.zip | |
spi: imx: use prepare_transfer_hardware() for lpspi
The old driver enable clk in fsl_lpspi_prepare_message() and
disable clk in fsl_lpspi_unprepare_message().
Rather than doing this per message it's a bit better to do it
in prepare_transfer_hardware(), that way if there's a sequence
of messages queued one after another we don't turn the clock on
and off all the time.
Signed-off-by: Gao Pan <pandy.gao@nxp.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/spi')
| -rw-r--r-- | drivers/spi/spi-fsl-lpspi.c | 10 |
1 files changed, 4 insertions, 6 deletions
diff --git a/drivers/spi/spi-fsl-lpspi.c b/drivers/spi/spi-fsl-lpspi.c index bcb7b284d2f2..d7ce32aa083b 100644 --- a/drivers/spi/spi-fsl-lpspi.c +++ b/drivers/spi/spi-fsl-lpspi.c @@ -148,16 +148,14 @@ static void fsl_lpspi_intctrl(struct fsl_lpspi_data *fsl_lpspi, writel(enable, fsl_lpspi->base + IMX7ULP_IER); } -static int fsl_lpspi_prepare_message(struct spi_master *master, - struct spi_message *msg) +static int lpspi_prepare_xfer_hardware(struct spi_master *master) { struct fsl_lpspi_data *fsl_lpspi = spi_master_get_devdata(master); return clk_prepare_enable(fsl_lpspi->clk); } -static int -fsl_lpspi_unprepare_message(struct spi_master *master, struct spi_message *msg) +static int lpspi_unprepare_xfer_hardware(struct spi_master *master) { struct fsl_lpspi_data *fsl_lpspi = spi_master_get_devdata(master); @@ -438,8 +436,8 @@ static int fsl_lpspi_probe(struct platform_device *pdev) fsl_lpspi->dev = &pdev->dev; master->transfer_one_message = fsl_lpspi_transfer_one_msg; - master->prepare_message = fsl_lpspi_prepare_message; - master->unprepare_message = fsl_lpspi_unprepare_message; + master->prepare_transfer_hardware = lpspi_prepare_xfer_hardware; + master->unprepare_transfer_hardware = lpspi_unprepare_xfer_hardware; master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH; master->flags = SPI_MASTER_MUST_RX | SPI_MASTER_MUST_TX; master->dev.of_node = pdev->dev.of_node; |