diff options
| author | Clark Wang <xiaoning.wang@nxp.com> | 2019-03-06 09:30:34 +0300 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2019-03-18 15:16:37 +0300 |
| commit | f5e5afdb0e56e81123e02b6a64dd32adc19a90d4 (patch) | |
| tree | cbaf391b4c352ddc3af268253ed3d3fe3cd8b27d /drivers/spi/spi-fsl-lpspi.c | |
| parent | 2e541b64ee5269278fde5c87953a9963a8219ed4 (diff) | |
| download | linux-f5e5afdb0e56e81123e02b6a64dd32adc19a90d4.tar.xz | |
spi: lpspi: Add i.MX8 boards support for lpspi
Add both ipg and per clock for lpspi to support i.MX8QM/QXP boards.
Signed-off-by: Clark Wang <xiaoning.wang@nxp.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/spi/spi-fsl-lpspi.c')
| -rw-r--r-- | drivers/spi/spi-fsl-lpspi.c | 52 |
1 files changed, 41 insertions, 11 deletions
diff --git a/drivers/spi/spi-fsl-lpspi.c b/drivers/spi/spi-fsl-lpspi.c index 391863914043..f363c000d24a 100644 --- a/drivers/spi/spi-fsl-lpspi.c +++ b/drivers/spi/spi-fsl-lpspi.c @@ -84,7 +84,8 @@ struct lpspi_config { struct fsl_lpspi_data { struct device *dev; void __iomem *base; - struct clk *clk; + struct clk *clk_ipg; + struct clk *clk_per; bool is_slave; void *rx_buf; @@ -151,8 +152,19 @@ static int lpspi_prepare_xfer_hardware(struct spi_controller *controller) { struct fsl_lpspi_data *fsl_lpspi = spi_controller_get_devdata(controller); + int ret; + + ret = clk_prepare_enable(fsl_lpspi->clk_ipg); + if (ret) + return ret; + + ret = clk_prepare_enable(fsl_lpspi->clk_per); + if (ret) { + clk_disable_unprepare(fsl_lpspi->clk_ipg); + return ret; + } - return clk_prepare_enable(fsl_lpspi->clk); + return 0; } static int lpspi_unprepare_xfer_hardware(struct spi_controller *controller) @@ -160,7 +172,8 @@ static int lpspi_unprepare_xfer_hardware(struct spi_controller *controller) struct fsl_lpspi_data *fsl_lpspi = spi_controller_get_devdata(controller); - clk_disable_unprepare(fsl_lpspi->clk); + clk_disable_unprepare(fsl_lpspi->clk_ipg); + clk_disable_unprepare(fsl_lpspi->clk_per); return 0; } @@ -241,7 +254,7 @@ static int fsl_lpspi_set_bitrate(struct fsl_lpspi_data *fsl_lpspi) unsigned int perclk_rate, scldiv; u8 prescale; - perclk_rate = clk_get_rate(fsl_lpspi->clk); + perclk_rate = clk_get_rate(fsl_lpspi->clk_per); for (prescale = 0; prescale < 8; prescale++) { scldiv = perclk_rate / (clkdivs[prescale] * config.speed_hz) - 2; @@ -526,15 +539,30 @@ static int fsl_lpspi_probe(struct platform_device *pdev) goto out_controller_put; } - fsl_lpspi->clk = devm_clk_get(&pdev->dev, "ipg"); - if (IS_ERR(fsl_lpspi->clk)) { - ret = PTR_ERR(fsl_lpspi->clk); + fsl_lpspi->clk_per = devm_clk_get(&pdev->dev, "per"); + if (IS_ERR(fsl_lpspi->clk_per)) { + ret = PTR_ERR(fsl_lpspi->clk_per); + goto out_controller_put; + } + + fsl_lpspi->clk_ipg = devm_clk_get(&pdev->dev, "ipg"); + if (IS_ERR(fsl_lpspi->clk_ipg)) { + ret = PTR_ERR(fsl_lpspi->clk_ipg); + goto out_controller_put; + } + + ret = clk_prepare_enable(fsl_lpspi->clk_ipg); + if (ret) { + dev_err(&pdev->dev, + "can't enable lpspi ipg clock, ret=%d\n", ret); goto out_controller_put; } - ret = clk_prepare_enable(fsl_lpspi->clk); + ret = clk_prepare_enable(fsl_lpspi->clk_per); if (ret) { - dev_err(&pdev->dev, "can't enable lpspi clock, ret=%d\n", ret); + dev_err(&pdev->dev, + "can't enable lpspi per clock, ret=%d\n", ret); + clk_disable_unprepare(fsl_lpspi->clk_ipg); goto out_controller_put; } @@ -542,7 +570,8 @@ static int fsl_lpspi_probe(struct platform_device *pdev) fsl_lpspi->txfifosize = 1 << (temp & 0x0f); fsl_lpspi->rxfifosize = 1 << ((temp >> 8) & 0x0f); - clk_disable_unprepare(fsl_lpspi->clk); + clk_disable_unprepare(fsl_lpspi->clk_per); + clk_disable_unprepare(fsl_lpspi->clk_ipg); ret = devm_spi_register_controller(&pdev->dev, controller); if (ret < 0) { @@ -564,7 +593,8 @@ static int fsl_lpspi_remove(struct platform_device *pdev) struct fsl_lpspi_data *fsl_lpspi = spi_controller_get_devdata(controller); - clk_disable_unprepare(fsl_lpspi->clk); + clk_disable_unprepare(fsl_lpspi->clk_per); + clk_disable_unprepare(fsl_lpspi->clk_ipg); return 0; } |