diff options
author | Lee Jones <lee.jones@linaro.org> | 2013-05-15 10:51:48 +0100 |
---|---|---|
committer | Linus Walleij <linus.walleij@linaro.org> | 2013-06-04 11:12:05 +0200 |
commit | 313bdb11e52a301aa7f6f8729a87ff0908785163 (patch) | |
tree | b0c2c6da3561c8bbe844e6e7a297129e363807e7 /drivers/usb/musb/ux500.c | |
parent | 2968da0b2c7297a29d49c7084d6865c2cf627093 (diff) |
usb: musb: ux500: add device tree probing support
This patch will allow ux500-musb to be probed and configured solely from
configuration found in Device Tree.
Cc: Rob Herring <rob.herring@calxeda.com>
Cc: linux-usb@vger.kernel.org
Cc: devicetree-discuss@lists.ozlabs.org
Acked-by: Felipe Balbi <balbi@ti.com>
Acked-by: Fabio Baltieri <fabio.baltieri@linaro.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/usb/musb/ux500.c')
-rw-r--r-- | drivers/usb/musb/ux500.c | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/drivers/usb/musb/ux500.c b/drivers/usb/musb/ux500.c index 3cf10bcaf118..f0beee7b868e 100644 --- a/drivers/usb/musb/ux500.c +++ b/drivers/usb/musb/ux500.c @@ -25,6 +25,7 @@ #include <linux/clk.h> #include <linux/err.h> #include <linux/io.h> +#include <linux/of.h> #include <linux/platform_device.h> #include <linux/usb/musb-ux500.h> @@ -194,14 +195,57 @@ static const struct musb_platform_ops ux500_ops = { .set_vbus = ux500_musb_set_vbus, }; +static struct musb_hdrc_platform_data * +ux500_of_probe(struct platform_device *pdev, struct device_node *np) +{ + struct musb_hdrc_platform_data *pdata; + const char *mode; + int strlen; + + pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); + if (!pdata) + return NULL; + + mode = of_get_property(np, "dr_mode", &strlen); + if (!mode) { + dev_err(&pdev->dev, "No 'dr_mode' property found\n"); + return NULL; + } + + if (strlen > 0) { + if (!strcmp(mode, "host")) + pdata->mode = MUSB_HOST; + if (!strcmp(mode, "otg")) + pdata->mode = MUSB_OTG; + if (!strcmp(mode, "peripheral")) + pdata->mode = MUSB_PERIPHERAL; + } + + return pdata; +} + static int ux500_probe(struct platform_device *pdev) { struct musb_hdrc_platform_data *pdata = pdev->dev.platform_data; + struct device_node *np = pdev->dev.of_node; struct platform_device *musb; struct ux500_glue *glue; struct clk *clk; int ret = -ENOMEM; + if (!pdata) { + if (np) { + pdata = ux500_of_probe(pdev, np); + if (!pdata) + goto err0; + + pdev->dev.platform_data = pdata; + } else { + dev_err(&pdev->dev, "no pdata or device tree found\n"); + goto err0; + } + } + glue = kzalloc(sizeof(*glue), GFP_KERNEL); if (!glue) { dev_err(&pdev->dev, "failed to allocate glue context\n"); @@ -230,6 +274,7 @@ static int ux500_probe(struct platform_device *pdev) musb->dev.parent = &pdev->dev; musb->dev.dma_mask = &pdev->dev.coherent_dma_mask; musb->dev.coherent_dma_mask = pdev->dev.coherent_dma_mask; + musb->dev.of_node = pdev->dev.of_node; glue->dev = &pdev->dev; glue->musb = musb; @@ -328,12 +373,18 @@ static const struct dev_pm_ops ux500_pm_ops = { #define DEV_PM_OPS NULL #endif +static const struct of_device_id ux500_match[] = { + { .compatible = "stericsson,db8500-musb", }, + {} +}; + static struct platform_driver ux500_driver = { .probe = ux500_probe, .remove = ux500_remove, .driver = { .name = "musb-ux500", .pm = DEV_PM_OPS, + .of_match_table = ux500_match, }, }; |