Messages in this thread | | | From | Ulf Hansson <> | Date | Mon, 28 Nov 2016 12:09:33 +0100 | Subject | Re: [PATCH 7/10] mmc: sdhci-xenon: Add support to PHYs of Marvell Xenon SDHC |
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> > Could you please tell me the requirement of "op_code" parameter in > mmc_send_tuning()? > According to mmc_send_tuning(),it seems that tuning command(CMD19/CMD21) > is required. Thus device will not response mmc_send_tuning() if current > speed mode doesn't support tuning command. > Please correct me if I am wrong. >
When the mmc core decides it's time to execute tuning, it invokes the ->execute_tuning() host ops, which has the "opcode" as a parameter. You should be able to use it when calling mmc_send_tuning().
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Kind regards Uffe
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