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| author |   Mark Brown <broonie@linaro.org> | 2013-10-25 09:51:29 +0100 |
|---|---|---|
| committer | Mark Brown <broonie@linaro.org> | 2013-10-25 09:51:29 +0100 |
| commit | c25b2c9eb36502f81c59df764074a475249a4550 (patch) | |
| tree | 9022af69f814d891419604978ff65330871236b6 /drivers/spi/spi-imx.c | |
| parent | Merge remote-tracking branch 'spi/topic/hspi' into spi-next (diff) | |
| parent | spi: spi-imx: only enable the clocks when we start to transfer a message (diff) | |
| download | linux-dev-c25b2c9eb36502f81c59df764074a475249a4550.tar.xz linux-dev-c25b2c9eb36502f81c59df764074a475249a4550.zip | |
Merge remote-tracking branch 'spi/topic/imx' into spi-next
Diffstat (limited to 'drivers/spi/spi-imx.c')
| -rw-r--r-- | drivers/spi/spi-imx.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/drivers/spi/spi-imx.c b/drivers/spi/spi-imx.c index 02d9f468b2b6..b80f2f70fef7 100644 --- a/drivers/spi/spi-imx.c +++ b/drivers/spi/spi-imx.c @@ -749,6 +749,35 @@ static void spi_imx_cleanup(struct spi_device *spi) { } +static int +spi_imx_prepare_message(struct spi_master *master, struct spi_message *msg) +{ + struct spi_imx_data *spi_imx = spi_master_get_devdata(master); + int ret; + + ret = clk_enable(spi_imx->clk_per); + if (ret) + return ret; + + ret = clk_enable(spi_imx->clk_ipg); + if (ret) { + clk_disable(spi_imx->clk_per); + return ret; + } + + return 0; +} + +static int +spi_imx_unprepare_message(struct spi_master *master, struct spi_message *msg) +{ + struct spi_imx_data *spi_imx = spi_master_get_devdata(master); + + clk_disable(spi_imx->clk_ipg); + clk_disable(spi_imx->clk_per); + return 0; +} + static int spi_imx_probe(struct platform_device *pdev) { struct device_node *np = pdev->dev.of_node; @@ -810,6 +839,8 @@ static int spi_imx_probe(struct platform_device *pdev) spi_imx->bitbang.txrx_bufs = spi_imx_transfer; spi_imx->bitbang.master->setup = spi_imx_setup; spi_imx->bitbang.master->cleanup = spi_imx_cleanup; + spi_imx->bitbang.master->prepare_message = spi_imx_prepare_message; + spi_imx->bitbang.master->unprepare_message = spi_imx_unprepare_message; spi_imx->bitbang.master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH; init_completion(&spi_imx->xfer_done); @@ -872,6 +903,8 @@ static int spi_imx_probe(struct platform_device *pdev) dev_info(&pdev->dev, "probed\n"); + clk_disable(spi_imx->clk_ipg); + clk_disable(spi_imx->clk_per); return ret; out_clk_put: |