diff options
Diffstat (limited to 'drivers/spi/spi-s3c64xx.c')
| -rw-r--r-- | drivers/spi/spi-s3c64xx.c | 57 |
1 files changed, 52 insertions, 5 deletions
diff --git a/drivers/spi/spi-s3c64xx.c b/drivers/spi/spi-s3c64xx.c index 3d21f8a35837..a1e84686c70c 100644 --- a/drivers/spi/spi-s3c64xx.c +++ b/drivers/spi/spi-s3c64xx.c @@ -156,12 +156,14 @@ struct s3c64xx_spi_port_config { int quirks; bool high_speed; bool clk_from_cmu; + bool clk_ioclk; }; /** * struct s3c64xx_spi_driver_data - Runtime info holder for SPI driver. * @clk: Pointer to the spi clock. * @src_clk: Pointer to the clock used to generate SPI signals. + * @ioclk: Pointer to the i/o clock between master and slave * @master: Pointer to the SPI Protocol master. * @cntrlr_info: Platform specific data for the controller this driver manages. * @tgl_spi: Pointer to the last CS left untoggled by the cs_change hint. @@ -181,6 +183,7 @@ struct s3c64xx_spi_driver_data { void __iomem *regs; struct clk *clk; struct clk *src_clk; + struct clk *ioclk; struct platform_device *pdev; struct spi_master *master; struct s3c64xx_spi_info *cntrlr_info; @@ -1154,6 +1157,21 @@ static int s3c64xx_spi_probe(struct platform_device *pdev) goto err_disable_clk; } + if (sdd->port_conf->clk_ioclk) { + sdd->ioclk = devm_clk_get(&pdev->dev, "spi_ioclk"); + if (IS_ERR(sdd->ioclk)) { + dev_err(&pdev->dev, "Unable to acquire 'ioclk'\n"); + ret = PTR_ERR(sdd->ioclk); + goto err_disable_src_clk; + } + + ret = clk_prepare_enable(sdd->ioclk); + if (ret) { + dev_err(&pdev->dev, "Couldn't enable clock 'ioclk'\n"); + goto err_disable_src_clk; + } + } + pm_runtime_set_autosuspend_delay(&pdev->dev, AUTOSUSPEND_TIMEOUT); pm_runtime_use_autosuspend(&pdev->dev); pm_runtime_set_active(&pdev->dev); @@ -1200,6 +1218,8 @@ err_pm_put: pm_runtime_disable(&pdev->dev); pm_runtime_set_suspended(&pdev->dev); + clk_disable_unprepare(sdd->ioclk); +err_disable_src_clk: clk_disable_unprepare(sdd->src_clk); err_disable_clk: clk_disable_unprepare(sdd->clk); @@ -1218,6 +1238,8 @@ static int s3c64xx_spi_remove(struct platform_device *pdev) writel(0, sdd->regs + S3C64XX_SPI_INT_EN); + clk_disable_unprepare(sdd->ioclk); + clk_disable_unprepare(sdd->src_clk); clk_disable_unprepare(sdd->clk); @@ -1276,6 +1298,7 @@ static int s3c64xx_spi_runtime_suspend(struct device *dev) clk_disable_unprepare(sdd->clk); clk_disable_unprepare(sdd->src_clk); + clk_disable_unprepare(sdd->ioclk); return 0; } @@ -1286,17 +1309,28 @@ static int s3c64xx_spi_runtime_resume(struct device *dev) struct s3c64xx_spi_driver_data *sdd = spi_master_get_devdata(master); int ret; + if (sdd->port_conf->clk_ioclk) { + ret = clk_prepare_enable(sdd->ioclk); + if (ret != 0) + return ret; + } + ret = clk_prepare_enable(sdd->src_clk); if (ret != 0) - return ret; + goto err_disable_ioclk; ret = clk_prepare_enable(sdd->clk); - if (ret != 0) { - clk_disable_unprepare(sdd->src_clk); - return ret; - } + if (ret != 0) + goto err_disable_src_clk; return 0; + +err_disable_src_clk: + clk_disable_unprepare(sdd->src_clk); +err_disable_ioclk: + clk_disable_unprepare(sdd->ioclk); + + return ret; } #endif /* CONFIG_PM */ @@ -1352,6 +1386,16 @@ static struct s3c64xx_spi_port_config exynos7_spi_port_config = { .quirks = S3C64XX_SPI_QUIRK_CS_AUTO, }; +static struct s3c64xx_spi_port_config exynos5433_spi_port_config = { + .fifo_lvl_mask = { 0x1ff, 0x7f, 0x7f, 0x7f, 0x7f, 0x1ff}, + .rx_lvl_offset = 15, + .tx_st_done = 25, + .high_speed = true, + .clk_from_cmu = true, + .clk_ioclk = true, + .quirks = S3C64XX_SPI_QUIRK_CS_AUTO, +}; + static const struct platform_device_id s3c64xx_spi_driver_ids[] = { { .name = "s3c2443-spi", @@ -1382,6 +1426,9 @@ static const struct of_device_id s3c64xx_spi_dt_match[] = { { .compatible = "samsung,exynos7-spi", .data = (void *)&exynos7_spi_port_config, }, + { .compatible = "samsung,exynos5433-spi", + .data = (void *)&exynos5433_spi_port_config, + }, { }, }; MODULE_DEVICE_TABLE(of, s3c64xx_spi_dt_match); |