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  • 2020-06-01
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cfi_flash.c

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  • Forked from Reform / reform-boundary-uboot
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    • Thomas Chou's avatar
      22d6c8fa
      cfi_flash: reset timer in flash status check · 22d6c8fa
      Thomas Chou authored
      
      This patch adds reset_timer() before the flash status check
      waiting loop.
      
      Since the timer is basically running asynchronous to the cfi
      code, it is possible to call get_timer(0), then only a few
      _SYSCLK_ cycles later an interrupt is generated. This causes
      timeout even though much less time has elapsed. So the timer
      period registers should be reset before get_timer(0) is
      called.
      
      There is similar usage in nand_base.c.
      
      Signed-off-by: default avatarThomas Chou <thomas@wytron.com.tw>
      Signed-off-by: default avatarStefan Roese <sr@denx.de>
      22d6c8fa
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      cfi_flash: reset timer in flash status check
      Thomas Chou authored
      
      This patch adds reset_timer() before the flash status check
      waiting loop.
      
      Since the timer is basically running asynchronous to the cfi
      code, it is possible to call get_timer(0), then only a few
      _SYSCLK_ cycles later an interrupt is generated. This causes
      timeout even though much less time has elapsed. So the timer
      period registers should be reset before get_timer(0) is
      called.
      
      There is similar usage in nand_base.c.
      
      Signed-off-by: default avatarThomas Chou <thomas@wytron.com.tw>
      Signed-off-by: default avatarStefan Roese <sr@denx.de>