diff options
| author | Shawn Guo <shawn.guo@linaro.org> | 2011-07-14 08:35:48 +0800 |
|---|---|---|
| committer | Shawn Guo <shawn.guo@linaro.org> | 2011-07-27 09:31:56 +0800 |
| commit | 580975d7f48d7d047e22bb0f42adf7557801d8d4 (patch) | |
| tree | 811134cad5d6d051d853e48f2d84e6f25fab49d0 /drivers/dma/imx-sdma.c | |
| parent | 40ad5b37914368a4f2c5ff1e72712375d6f1188b (diff) | |
dmaengine: imx-sdma: add device tree probe support
It adds device tree probe support for imx-sdma driver.
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: Vinod Koul <vinod.koul@intel.com>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Acked-by: Vinod Koul <vinod.koul@intel.com>
Diffstat (limited to 'drivers/dma/imx-sdma.c')
| -rw-r--r-- | drivers/dma/imx-sdma.c | 42 |
1 files changed, 39 insertions, 3 deletions
diff --git a/drivers/dma/imx-sdma.c b/drivers/dma/imx-sdma.c index df400691f9a..1eb60ded2f0 100644 --- a/drivers/dma/imx-sdma.c +++ b/drivers/dma/imx-sdma.c @@ -32,6 +32,8 @@ #include <linux/slab.h> #include <linux/platform_device.h> #include <linux/dmaengine.h> +#include <linux/of.h> +#include <linux/of_device.h> #include <asm/irq.h> #include <mach/sdma.h> @@ -332,6 +334,13 @@ static struct platform_device_id sdma_devtypes[] = { }; MODULE_DEVICE_TABLE(platform, sdma_devtypes); +static const struct of_device_id sdma_dt_ids[] = { + { .compatible = "fsl,imx31-sdma", .data = &sdma_devtypes[IMX31_SDMA], }, + { .compatible = "fsl,imx35-sdma", .data = &sdma_devtypes[IMX35_SDMA], }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, sdma_dt_ids); + #define SDMA_H_CONFIG_DSPDMA (1 << 12) /* indicates if the DSPDMA is used */ #define SDMA_H_CONFIG_RTD_PINS (1 << 11) /* indicates if Real-Time Debug pins are enabled */ #define SDMA_H_CONFIG_ACR (1 << 4) /* indicates if AHB freq /core freq = 2 or 1 */ @@ -1250,6 +1259,10 @@ err_dma_alloc: static int __init sdma_probe(struct platform_device *pdev) { + const struct of_device_id *of_id = + of_match_device(sdma_dt_ids, &pdev->dev); + struct device_node *np = pdev->dev.of_node; + const char *fw_name; int ret; int irq; struct resource *iores; @@ -1265,7 +1278,7 @@ static int __init sdma_probe(struct platform_device *pdev) iores = platform_get_resource(pdev, IORESOURCE_MEM, 0); irq = platform_get_irq(pdev, 0); - if (!iores || irq < 0 || !pdata) { + if (!iores || irq < 0) { ret = -EINVAL; goto err_irq; } @@ -1295,6 +1308,8 @@ static int __init sdma_probe(struct platform_device *pdev) if (!sdma->script_addrs) goto err_alloc; + if (of_id) + pdev->id_entry = of_id->data; sdma->devtype = pdev->id_entry->driver_data; dma_cap_set(DMA_SLAVE, sdma->dma_device.cap_mask); @@ -1325,10 +1340,30 @@ static int __init sdma_probe(struct platform_device *pdev) if (ret) goto err_init; - if (pdata->script_addrs) + if (pdata && pdata->script_addrs) sdma_add_scripts(sdma, pdata->script_addrs); - sdma_get_firmware(sdma, pdata->fw_name); + if (pdata) { + sdma_get_firmware(sdma, pdata->fw_name); + } else { + /* + * Because that device tree does not encode ROM script address, + * the RAM script in firmware is mandatory for device tree + * probe, otherwise it fails. + */ + ret = of_property_read_string(np, "fsl,sdma-ram-script-name", + &fw_name); + if (ret) { + dev_err(&pdev->dev, "failed to get firmware name\n"); + goto err_init; + } + + ret = sdma_get_firmware(sdma, fw_name); + if (ret) { + dev_err(&pdev->dev, "failed to get firmware\n"); + goto err_init; + } + } sdma->dma_device.dev = &pdev->dev; @@ -1376,6 +1411,7 @@ static int __exit sdma_remove(struct platform_device *pdev) static struct platform_driver sdma_driver = { .driver = { .name = "imx-sdma", + .of_match_table = sdma_dt_ids, }, .id_table = sdma_devtypes, .remove = __exit_p(sdma_remove), |