On 05/24/2013 11:31 PM, Kishon Vijay Abraham I wrote:
> Modified dwc3-omap to receive connect and disconnect notification using
> extcon framework. Also did the necessary cleanups required after
> adapting to extcon framework.
>
> Signed-off-by: Kishon Vijay Abraham I <kishon@xxxxxx>
> ---
> drivers/usb/dwc3/dwc3-omap.c | 80 +++++++++++++++++++++++++++++++++----------
> include/linux/usb/dwc3-omap.h | 30 ----------------
> 2 files changed, 62 insertions(+), 48 deletions(-)
> delete mode 100644 include/linux/usb/dwc3-omap.h
Hi Kishon,
Thi patch is suspended until fix following build error.
(If kernel builds extcon fwr as module, dwc3-omap.c happen error message)
---
tree: git://git.kernel.org/pub/scm/linux/kernel/git/chanwoo/extcon extcon-next
head: 30f5d6ea2561c2a54e40b1e8e8f9bb30e064e01b
commit: 30f5d6ea2561c2a54e40b1e8e8f9bb30e064e01b [3/3] usb: dwc3: use extcon fwrk to receive connect/disconnect notification
config: i386-randconfig-x14-0530 (attached as .config)
All error/warnings:
drivers/built-in.o: In function `dwc3_omap_remove':
dwc3-omap.c:(.text+0x8c0fa): undefined reference to `extcon_unregister_interest'
dwc3-omap.c:(.text+0x8c102): undefined reference to `extcon_unregister_interest'
drivers/built-in.o: In function `dwc3_omap_probe':
dwc3-omap.c:(.text+0x8c5e6): undefined reference to `extcon_get_extcon_dev'
dwc3-omap.c:(.text+0x8c6a4): undefined reference to `extcon_register_interest'
dwc3-omap.c:(.text+0x8c6c9): undefined reference to `extcon_register_interest'
dwc3-omap.c:(.text+0x8c831): undefined reference to `extcon_get_cable_state'
dwc3-omap.c:(.text+0x8c851): undefined reference to `extcon_get_cable_state'
---
Also, I missed a issue of this patch. If h/w target use other USB device
instead of "palmas-usb", dwc-omap.c driver won't be operating.
So, I propose two method about this issue.
First, we can get extcon device name through platform data or dt.
Two, When use extcon_register_interest() to register notifier block,
NULL pointer pass to extcon_register_interest() instead of specific extcon
device name(palmas-usb). If extcon_register_interest() check NULL
pointer of extcon device name parameter, extcon fwr will find previous
registered extcon device and then register notifier block of consumer
device driver(dwc3-omap.c) to previous registered extcon device.
> + edev = extcon_get_extcon_dev("palmas-usb");
> + if (!edev) {
> + dev_dbg(dev, "couldn't get extcon device\n");
> + return -EPROBE_DEFER;
> + }
> +
> spin_lock_init(&omap->lock);
>
> omap->dev = dev;
> omap->irq = irq;
> omap->base = base;
> + omap->vbus_nb.notifier_call = dwc3_omap_vbus_notifier;
> + extcon_register_interest(&omap->extcon_vbus_dev, "palmas-usb", "USB",
> + &omap->vbus_nb);
> + omap->id_nb.notifier_call = dwc3_omap_id_notifier;
> + extcon_register_interest(&omap->extcon_id_dev, "palmas-usb", "USB-HOST",
> + &omap->id_nb);
> dev->dma_mask = &dwc3_omap_dma_mask;
>
> +
Thanks,
Chanwoo Choi
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