Hi Deepanjan, have a look at ledtrig-ata on how to register a LED trigger for each port [1]. Currently this provides only an activity indicator, however, extending it to the features you described should not be too difficult. Let me know if you need more hints/help with that.
Cheers Daniel 1: https://dev.openwrt.org/browser/trunk/target/linux/generic/patches-3.18/834-ledtrig-libata.patch On Mon, Mar 30, 2015 at 09:38:15AM +0000, Deepanjan Kar wrote: > Dear All, > > I would be thankful if you could provide me hint on to how to implement a > driver for LED for a AHCI Controller. > At present the LED is driven by GPIO. > The requirement is that the LED should GLOW SOLID once the SATA link is UP, > TOGGLE during SATA traffic and GLOW HOLLOW once the link is down. > > The driver should expose the LEDS to SYSFS for control from the user. > > A driver for LEDS for USB is present in drivers/leds/ledtrig-usbdev.c. > This uses a function call "usb_register_notify" to get notified from the USB > Core about the USB link. > > Do we have something similar for SATA ? > > Regards, > Deepanjan > > _______________________________________________ > openwrt-devel mailing list > openwrt-devel@lists.openwrt.org > https://lists.openwrt.org/cgi-bin/mailman/listinfo/openwrt-devel _______________________________________________ openwrt-devel mailing list openwrt-devel@lists.openwrt.org https://lists.openwrt.org/cgi-bin/mailman/listinfo/openwrt-devel
