watchdog: ziirave_wdt: Add support to upload the firmware.
This patch adds and entry to the sysfs to start firmware upload process on the specified device with the requested firmware. The uploading of the firmware needs only to happen once per firmware upgrade, as the firmware is stored in persistent storage. If the firmware upload or the firmware verification fails then we print and error message and exit. Signed-off-by: NEnric Balletbo i Serra <enric.balletbo@collabora.com> Reviewed-by: NGuenter Roeck <linux@roeck-us.net> Signed-off-by: NGuenter Roeck <linux@roeck-us.net> Signed-off-by: NWim Van Sebroeck <wim@iguana.be>
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