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| author |   Richard Zhao <richard.zhao@freescale.com> | 2012-07-07 22:56:42 +0800 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-07-09 09:53:44 -0700 |
| commit | fe6e125e30fb9d93fdfc5e3e3702b9c7c3076194 (patch) | |
| tree | e88ebed6c65ca251a5563a64c86e8d2b8e27916b /drivers/usb/chipidea/core.c | |
| parent | USB: Chipidea: add unified ci13xxx_{add,remove}_device for platform drivers (diff) | |
| download | linux-dev-fe6e125e30fb9d93fdfc5e3e3702b9c7c3076194.tar.xz linux-dev-fe6e125e30fb9d93fdfc5e3e3702b9c7c3076194.zip | |
USB: Chipidea: add ci13xxx device id management
We use ida_simple_get and ida_simple_remove to manage the ids.
Signed-off-by: Richard Zhao <richard.zhao@freescale.com>
Reviewed-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/chipidea/core.c')
| -rw-r--r-- | drivers/usb/chipidea/core.c | 21 |
1 files changed, 16 insertions, 5 deletions
diff --git a/drivers/usb/chipidea/core.c b/drivers/usb/chipidea/core.c index 8b9d06fd0325..39603d7b7916 100644 --- a/drivers/usb/chipidea/core.c +++ b/drivers/usb/chipidea/core.c @@ -56,6 +56,7 @@ #include <linux/init.h> #include <linux/platform_device.h> #include <linux/module.h> +#include <linux/idr.h> #include <linux/interrupt.h> #include <linux/io.h> #include <linux/irq.h> @@ -332,17 +333,24 @@ static irqreturn_t ci_irq(int irq, void *data) return ci->role == CI_ROLE_END ? ret : ci_role(ci)->irq(ci); } +static DEFINE_IDA(ci_ida); + struct platform_device *ci13xxx_add_device(struct device *dev, struct resource *res, int nres, struct ci13xxx_platform_data *platdata) { struct platform_device *pdev; - int ret; + int id, ret; - /* FIXME: find a way to choose id */ - pdev = platform_device_alloc("ci_hdrc", -1); - if (!pdev) - return ERR_PTR(-ENOMEM); + id = ida_simple_get(&ci_ida, 0, 0, GFP_KERNEL); + if (id < 0) + return ERR_PTR(id); + + pdev = platform_device_alloc("ci_hdrc", id); + if (!pdev) { + ret = -ENOMEM; + goto put_id; + } pdev->dev.parent = dev; pdev->dev.dma_mask = dev->dma_mask; @@ -365,6 +373,8 @@ struct platform_device *ci13xxx_add_device(struct device *dev, err: platform_device_put(pdev); +put_id: + ida_simple_remove(&ci_ida, id); return ERR_PTR(ret); } EXPORT_SYMBOL_GPL(ci13xxx_add_device); @@ -372,6 +382,7 @@ EXPORT_SYMBOL_GPL(ci13xxx_add_device); void ci13xxx_remove_device(struct platform_device *pdev) { platform_device_unregister(pdev); + ida_simple_remove(&ci_ida, pdev->id); } EXPORT_SYMBOL_GPL(ci13xxx_remove_device); |