Masayuki Ishikawa
466ab56c10
Merged in masayuki2009/nuttx.nuttx/fe310_gpio (pull request #1097)
fe310 gpio
* arch: risc-v: Add arch/risc-v/src/common/up_mdelay.c
* arch: risc-v: Add arch/risc-v/src/common/up_udelay.c
* arch: fe310: Add #include <stdint.h> to fe310_start.c
* arch: risc-v: Add up_ack_irq() definition to commpn/up_internal.h
* arch: fe310: Add FE310 GPIO driver
* boards: hifive-revb: Add compiler optimization
* boards: hifive1-revb: Add auto leds related files.
* arch: fe310: Add CPU activity led to fe310_idle.c
* boards: hifive-revb: Add a button
NOTE: still having a trouble in signal handling.
Approved-by: Gregory Nutt <gnutt@nuttx.org>