From 83a82e4b9d1d16ab1aae55429972ab38e4b1aff7 Mon Sep 17 00:00:00 2001 From: Nikita Shubin Date: Thu, 10 Jun 2021 10:37:28 +0300 Subject: [PATCH] spi: ep93xx: add DT support for Cirrus EP93xx - find register range from the device tree - provide clock access via of - use_dma as a DT node Signed-off-by: Nikita Shubin --- drivers/spi/spi-ep93xx.c | 33 ++++++++++++++++++++++++++++++++- 1 file changed, 32 insertions(+), 1 deletion(-) diff --git a/drivers/spi/spi-ep93xx.c b/drivers/spi/spi-ep93xx.c index 5896a7b2fade0..cf7f654926ab1 100644 --- a/drivers/spi/spi-ep93xx.c +++ b/drivers/spi/spi-ep93xx.c @@ -22,6 +22,7 @@ #include #include #include +#include #include #include #include @@ -644,6 +645,25 @@ static void ep93xx_spi_release_dma(struct ep93xx_spi *espi) free_page((unsigned long)espi->zeropage); } +#ifdef CONFIG_OF +static struct ep93xx_spi_info dt_spi_info; + +static struct ep93xx_spi_info *ep93xx_spi_get_platdata(struct platform_device *pdev) +{ + struct device_node *np = pdev->dev.of_node; + + if (np && of_property_read_bool(np, "use_dma")) + dt_spi_info.use_dma = 1; + + return &dt_spi_info; +} +#else +static struct ep93xx_spi_info *ep93xx_spi_get_platdata(struct platform_device *pdev) +{ + return dev_get_platdata(&pdev->dev); +} +#endif + static int ep93xx_spi_probe(struct platform_device *pdev) { struct spi_master *master; @@ -653,7 +673,7 @@ static int ep93xx_spi_probe(struct platform_device *pdev) int irq; int error; - info = dev_get_platdata(&pdev->dev); + info = ep93xx_spi_get_platdata(pdev); if (!info) { dev_err(&pdev->dev, "missing platform data\n"); return -EINVAL; @@ -726,6 +746,8 @@ static int ep93xx_spi_probe(struct platform_device *pdev) /* make sure that the hardware is disabled */ writel(0, espi->mmio + SSPCR1); + master->dev.of_node = pdev->dev.of_node; + error = devm_spi_register_master(&pdev->dev, master); if (error) { dev_err(&pdev->dev, "failed to register SPI master\n"); @@ -755,9 +777,18 @@ static int ep93xx_spi_remove(struct platform_device *pdev) return 0; } +#ifdef CONFIG_OF +static const struct of_device_id ep93xx_spi_of_ids[] = { + { .compatible = "cirrus,ep93xx-spi" }, + {}, +}; +MODULE_DEVICE_TABLE(of, ep93xx_spi_of_ids); +#endif + static struct platform_driver ep93xx_spi_driver = { .driver = { .name = "ep93xx-spi", + .of_match_table = of_match_ptr(ep93xx_spi_of_ids), }, .probe = ep93xx_spi_probe, .remove = ep93xx_spi_remove, -- 2.30.2