From 7b43da4cfdd5e88157fe83a07cc49919080d3205 Mon Sep 17 00:00:00 2001 From: "Manjunathappa, Prakash" Date: Thu, 28 Mar 2013 18:42:00 +0530 Subject: mmc: davinci_mmc: add DT support Adds device tree support for davinci_mmc. Also add binding documentation. As of now tested for non-dma PIO mode and without GPIO card_detect/ write_protect option because of dependencies on EDMA and GPIO module DT support. Signed-off-by: Manjunathappa, Prakash Reviewed-by: Mark Rutland Tested-by: Sekhar Nori Cc: linux-mmc@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org Cc: davinci-linux-open-source@linux.davincidsp.com Cc: devicetree-discuss@lists.ozlabs.org Cc: cjb@laptop.org Cc: Sekhar Nori Cc: mporter@ti.com Cc: Arnd Bergmann Acked-by: Arnd Bergmann Acked-by: Chris Ball Signed-off-by: Sekhar Nori --- drivers/mmc/host/davinci_mmc.c | 70 +++++++++++++++++++++++++++++++++++++++--- 1 file changed, 66 insertions(+), 4 deletions(-) (limited to 'drivers/mmc') diff --git a/drivers/mmc/host/davinci_mmc.c b/drivers/mmc/host/davinci_mmc.c index b5f1c019ecad..f8a96d652e9e 100644 --- a/drivers/mmc/host/davinci_mmc.c +++ b/drivers/mmc/host/davinci_mmc.c @@ -34,6 +34,8 @@ #include #include #include +#include +#include #include @@ -522,14 +524,16 @@ static int __init davinci_acquire_dma_channels(struct mmc_davinci_host *host) dma_cap_set(DMA_SLAVE, mask); host->dma_tx = - dma_request_channel(mask, edma_filter_fn, &host->txdma); + dma_request_slave_channel_compat(mask, edma_filter_fn, + &host->txdma, mmc_dev(host->mmc), "tx"); if (!host->dma_tx) { dev_err(mmc_dev(host->mmc), "Can't get dma_tx channel\n"); return -ENODEV; } host->dma_rx = - dma_request_channel(mask, edma_filter_fn, &host->rxdma); + dma_request_slave_channel_compat(mask, edma_filter_fn, + &host->rxdma, mmc_dev(host->mmc), "rx"); if (!host->dma_rx) { dev_err(mmc_dev(host->mmc), "Can't get dma_rx channel\n"); r = -ENODEV; @@ -1169,9 +1173,62 @@ static struct platform_device_id davinci_mmc_devtype[] = { }; MODULE_DEVICE_TABLE(platform, davinci_mmc_devtype); -static int __init davinci_mmcsd_probe(struct platform_device *pdev) +static const struct of_device_id davinci_mmc_dt_ids[] = { + { + .compatible = "ti,dm6441-mmc", + .data = &davinci_mmc_devtype[MMC_CTLR_VERSION_1], + }, + { + .compatible = "ti,da830-mmc", + .data = &davinci_mmc_devtype[MMC_CTLR_VERSION_2], + }, + {}, +}; +MODULE_DEVICE_TABLE(of, davinci_mmc_dt_ids); + +static struct davinci_mmc_config + *mmc_parse_pdata(struct platform_device *pdev) { + struct device_node *np; struct davinci_mmc_config *pdata = pdev->dev.platform_data; + const struct of_device_id *match = + of_match_device(of_match_ptr(davinci_mmc_dt_ids), &pdev->dev); + u32 data; + + np = pdev->dev.of_node; + if (!np) + return pdata; + + pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); + if (!pdata) { + dev_err(&pdev->dev, "Failed to allocate memory for struct davinci_mmc_config\n"); + goto nodata; + } + + if (match) + pdev->id_entry = match->data; + + if (of_property_read_u32(np, "max-frequency", &pdata->max_freq)) + dev_info(&pdev->dev, "'max-frequency' property not specified, defaulting to 25MHz\n"); + + of_property_read_u32(np, "bus-width", &data); + switch (data) { + case 1: + case 4: + case 8: + pdata->wires = data; + break; + default: + pdata->wires = 1; + dev_info(&pdev->dev, "Unsupported buswidth, defaulting to 1 bit\n"); + } +nodata: + return pdata; +} + +static int __init davinci_mmcsd_probe(struct platform_device *pdev) +{ + struct davinci_mmc_config *pdata = NULL; struct mmc_davinci_host *host = NULL; struct mmc_host *mmc = NULL; struct resource *r, *mem = NULL; @@ -1179,7 +1236,11 @@ static int __init davinci_mmcsd_probe(struct platform_device *pdev) size_t mem_size; const struct platform_device_id *id_entry; - /* REVISIT: when we're fully converted, fail if pdata is NULL */ + pdata = mmc_parse_pdata(pdev); + if (pdata == NULL) { + dev_err(&pdev->dev, "Couldn't get platform data\n"); + return -ENOENT; + } ret = -ENODEV; r = platform_get_resource(pdev, IORESOURCE_MEM, 0); @@ -1421,6 +1482,7 @@ static struct platform_driver davinci_mmcsd_driver = { .name = "davinci_mmc", .owner = THIS_MODULE, .pm = davinci_mmcsd_pm_ops, + .of_match_table = of_match_ptr(davinci_mmc_dt_ids), }, .remove = __exit_p(davinci_mmcsd_remove), .id_table = davinci_mmc_devtype, -- cgit v1.2.1