1. 03 12月, 2020 5 次提交
  2. 29 11月, 2020 1 次提交
  3. 28 11月, 2020 1 次提交
    • Y
      mmc: fsl_esdhc: make sure delay chain locked for HS400 · 8ee802f8
      Yangbo Lu 提交于
      For eMMC HS400 mode, the DLL reset is a required step for mmc rescan.
      This step has not been documented in reference manual, but the RM will
      be fixed sooner or later.
      
      In previous commit to support eMMC HS400,
        db8f9367 mmc: fsl_esdhc: support eMMC HS400 mode
      
      the steps to configure DLL could be found in commit message,
        13. Set DLLCFG0[DLL_ENABLE] and DLLCFG0[DLL_FREQ_SEL].
        14. Wait for delay chain to lock.
      
      these would be fixed as,
        13.   Set DLLCFG0[DLL_ENABLE] and DLLCFG0[DLL_FREQ_SEL].
        13.1  Write DLLCFG0[DLL_RESET] to 1 and wait for 1us,
              then write DLLCFG0[DLL_RESET]
        14.   Wait for delay chain to lock.
      
      This patch is to add the step of DLL reset, and make sure delay chain
      locked for HS400.
      
      Fixes: db8f9367 ("mmc: fsl_esdhc: support eMMC HS400 mode")
      Signed-off-by: NYangbo Lu <yangbo.lu@nxp.com>
      Reviewed-by: NJaehoon Chung <jh80.chung@samsung.com>
      8ee802f8
  4. 25 11月, 2020 1 次提交
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