From: Benoit Cousson Date: Wed, 15 Feb 2012 17:37:34 +0000 (+0100) Subject: spi/omap: Add DT support to McSPI driver X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=d5a8003135da7afe311e4e13ff42000ab7cd2078;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git spi/omap: Add DT support to McSPI driver Add device tree support to the OMAP2+ McSPI driver. Add the bindings documentation. Based on original code from Rajendra. Signed-off-by: Benoit Cousson Cc: Grant Likely Cc: Rajendra Nayak Signed-off-by: Grant Likely --- diff --git a/Documentation/devicetree/bindings/spi/omap-spi.txt b/Documentation/devicetree/bindings/spi/omap-spi.txt new file mode 100644 index 000000000000..81df374adbb9 --- /dev/null +++ b/Documentation/devicetree/bindings/spi/omap-spi.txt @@ -0,0 +1,20 @@ +OMAP2+ McSPI device + +Required properties: +- compatible : + - "ti,omap2-spi" for OMAP2 & OMAP3. + - "ti,omap4-spi" for OMAP4+. +- ti,spi-num-cs : Number of chipselect supported by the instance. +- ti,hwmods: Name of the hwmod associated to the McSPI + + +Example: + +mcspi1: mcspi@1 { + #address-cells = <1>; + #size-cells = <0>; + compatible = "ti,omap4-mcspi"; + ti,hwmods = "mcspi1"; + ti,spi-num-cs = <4>; +}; + diff --git a/drivers/spi/spi-omap2-mcspi.c b/drivers/spi/spi-omap2-mcspi.c index 0b0dfb71c640..bb9274c2526d 100644 --- a/drivers/spi/spi-omap2-mcspi.c +++ b/drivers/spi/spi-omap2-mcspi.c @@ -34,6 +34,8 @@ #include #include #include +#include +#include #include @@ -1079,15 +1081,39 @@ static int omap_mcspi_runtime_resume(struct device *dev) return 0; } +static struct omap2_mcspi_platform_config omap2_pdata = { + .regs_offset = 0, +}; + +static struct omap2_mcspi_platform_config omap4_pdata = { + .regs_offset = OMAP4_MCSPI_REG_OFFSET, +}; + +static const struct of_device_id omap_mcspi_of_match[] = { + { + .compatible = "ti,omap2-mcspi", + .data = &omap2_pdata, + }, + { + .compatible = "ti,omap4-mcspi", + .data = &omap4_pdata, + }, + { }, +}; +MODULE_DEVICE_TABLE(of, omap_mcspi_of_match); static int __init omap2_mcspi_probe(struct platform_device *pdev) { struct spi_master *master; - struct omap2_mcspi_platform_config *pdata = pdev->dev.platform_data; + struct omap2_mcspi_platform_config *pdata; struct omap2_mcspi *mcspi; struct resource *r; int status = 0, i; char wq_name[20]; + u32 regs_offset = 0; + static int bus_num = 1; + struct device_node *node = pdev->dev.of_node; + const struct of_device_id *match; master = spi_alloc_master(&pdev->dev, sizeof *mcspi); if (master == NULL) { @@ -1098,13 +1124,26 @@ static int __init omap2_mcspi_probe(struct platform_device *pdev) /* the spi->mode bits understood by this driver: */ master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH; - if (pdev->id != -1) - master->bus_num = pdev->id; - master->setup = omap2_mcspi_setup; master->transfer = omap2_mcspi_transfer; master->cleanup = omap2_mcspi_cleanup; - master->num_chipselect = pdata->num_cs; + master->dev.of_node = node; + + match = of_match_device(omap_mcspi_of_match, &pdev->dev); + if (match) { + u32 num_cs = 1; /* default number of chipselect */ + pdata = match->data; + + of_property_read_u32(node, "ti,spi-num-cs", &num_cs); + master->num_chipselect = num_cs; + master->bus_num = bus_num++; + } else { + pdata = pdev->dev.platform_data; + master->num_chipselect = pdata->num_cs; + if (pdev->id != -1) + master->bus_num = pdev->id; + } + regs_offset = pdata->regs_offset; dev_set_drvdata(&pdev->dev, master); @@ -1124,8 +1163,8 @@ static int __init omap2_mcspi_probe(struct platform_device *pdev) goto free_master; } - r->start += pdata->regs_offset; - r->end += pdata->regs_offset; + r->start += regs_offset; + r->end += regs_offset; mcspi->phys = r->start; if (!request_mem_region(r->start, resource_size(r), dev_name(&pdev->dev))) { @@ -1285,7 +1324,8 @@ static struct platform_driver omap2_mcspi_driver = { .driver = { .name = "omap2_mcspi", .owner = THIS_MODULE, - .pm = &omap2_mcspi_pm_ops + .pm = &omap2_mcspi_pm_ops, + .of_match_table = omap_mcspi_of_match, }, .remove = __exit_p(omap2_mcspi_remove), };