1 From ae4f027580168814f734cf3c41a662a7f10c744c Mon Sep 17 00:00:00 2001
2 From: David Brownell <dbrownell-Rn4VEauK+AKRv+LV9MX5uipxlwaOVQ5f@public.gmane.org>
3 Date: Tue, 31 Mar 2009 12:28:31 -0700
4 Subject: [PATCH] nop-usb-xceiv: behave when linked as a module
6 The NOP OTG transceiver driver needs to be usable from modules.
7 Make sure its symbols are always accessible at both compile and
8 link time, and make sure the device instance is allocated from
9 the heap so that device lifetime rules are obeyed.
11 Signed-off-by: David Brownell <dbrownell-Rn4VEauK+AKRv+LV9MX5uipxlwaOVQ5f@public.gmane.org>
13 drivers/usb/otg/nop-usb-xceiv.c | 25 ++++++++++---------------
14 include/linux/usb/otg.h | 4 ++--
15 2 files changed, 12 insertions(+), 17 deletions(-)
17 diff --git a/drivers/usb/otg/nop-usb-xceiv.c b/drivers/usb/otg/nop-usb-xceiv.c
18 index 4b933f6..9ed5ea5 100644
19 --- a/drivers/usb/otg/nop-usb-xceiv.c
20 +++ b/drivers/usb/otg/nop-usb-xceiv.c
22 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25 - * this is to add "nop" transceiver for all those phy which is
26 - * autonomous such as isp1504 etc.
27 + * This provides a "nop" transceiver for PHYs which are
28 + * autonomous such as isp1504, isp1707, etc.
31 #include <linux/module.h>
32 @@ -36,30 +36,25 @@ struct nop_usb_xceiv {
36 -static u64 nop_xceiv_dmamask = DMA_32BIT_MASK;
38 -static struct platform_device nop_xceiv_device = {
39 - .name = "nop_usb_xceiv",
42 - .dma_mask = &nop_xceiv_dmamask,
43 - .coherent_dma_mask = DMA_32BIT_MASK,
44 - .platform_data = NULL,
47 +static struct platform_device *pd;
49 void usb_nop_xceiv_register(void)
51 - if (platform_device_register(&nop_xceiv_device) < 0) {
54 + pd = platform_device_register_simple("nop_usb_xceiv", -1, NULL, 0);
56 printk(KERN_ERR "Unable to register usb nop transceiver\n");
60 +EXPORT_SYMBOL(usb_nop_xceiv_register);
62 void usb_nop_xceiv_unregister(void)
64 - platform_device_unregister(&nop_xceiv_device);
65 + platform_device_unregister(pd);
67 +EXPORT_SYMBOL(usb_nop_xceiv_unregister);
69 static inline struct nop_usb_xceiv *xceiv_to_nop(struct otg_transceiver *x)
71 diff --git a/include/linux/usb/otg.h b/include/linux/usb/otg.h
72 index 54f2424..7df8bae 100644
73 --- a/include/linux/usb/otg.h
74 +++ b/include/linux/usb/otg.h
75 @@ -80,10 +80,10 @@ struct otg_transceiver {
77 /* for board-specific init logic */
78 extern int otg_set_transceiver(struct otg_transceiver *);
79 -#ifdef CONFIG_NOP_USB_XCEIV
81 +/* sometimes transceivers are accessed only through e.g. ULPI */
82 extern void usb_nop_xceiv_register(void);
83 extern void usb_nop_xceiv_unregister(void);
87 /* for usb host and peripheral controller drivers */