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0cfbd328d6
With this patch, USB activity can be signaled by blinking a LED. There are two triggers, one for activity on USB host and one for USB gadget. Both triggers should work with all host/device controllers. Tested only with musb. Performace: I measured performance overheads on ARM Cortex-A8 (TI AM335x) running on 600 MHz. Duration of usb_led_activity(): - with no LED attached to the trigger: 2 ± 1 µs - with one GPIO LED attached to the trigger: 2 ± 1 µs or 8 ± 2 µs (two peaks in histogram) Duration of functions calling usb_led_activity() (with this patch applied and no LED attached to the trigger): - __usb_hcd_giveback_urb(): 10 - 25 µs - usb_gadget_giveback_request(): 2 - 6 µs Signed-off-by: Michal Sojka <sojka@merica.cz> Acked-by: Felipe Balbi <balbi@ti.com> Tested-by: Felipe Balbi <balbi@ti.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
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| .. | ||
| amd5536udc.c | ||
| amd5536udc.h | ||
| at91_udc.c | ||
| at91_udc.h | ||
| atmel_usba_udc.c | ||
| atmel_usba_udc.h | ||
| bcm63xx_udc.c | ||
| dummy_hcd.c | ||
| fotg210-udc.c | ||
| fotg210.h | ||
| fsl_mxc_udc.c | ||
| fsl_qe_udc.c | ||
| fsl_qe_udc.h | ||
| fsl_udc_core.c | ||
| fsl_usb2_udc.h | ||
| fusb300_udc.c | ||
| fusb300_udc.h | ||
| gadget_chips.h | ||
| goku_udc.c | ||
| goku_udc.h | ||
| gr_udc.c | ||
| gr_udc.h | ||
| Kconfig | ||
| lpc32xx_udc.c | ||
| m66592-udc.c | ||
| m66592-udc.h | ||
| Makefile | ||
| mv_u3d_core.c | ||
| mv_u3d.h | ||
| mv_udc_core.c | ||
| mv_udc.h | ||
| net2272.c | ||
| net2272.h | ||
| net2280.c | ||
| net2280.h | ||
| omap_udc.c | ||
| omap_udc.h | ||
| pch_udc.c | ||
| pxa25x_udc.c | ||
| pxa25x_udc.h | ||
| pxa27x_udc.c | ||
| pxa27x_udc.h | ||
| r8a66597-udc.c | ||
| r8a66597-udc.h | ||
| s3c2410_udc.c | ||
| s3c2410_udc.h | ||
| s3c-hsudc.c | ||
| udc-core.c | ||
| udc-xilinx.c | ||