linux-kernel - [PATCH 0/4] mmc: core: Preparations to support SD UHS-II cards

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Message-Id: <20210225170352.76872-1-ulf.hansson@linaro.org>
Date:   Thu, 25 Feb 2021 18:03:48 +0100
From:   Ulf Hansson <ulf.hansson@...aro.org>
To:     linux-mmc@...r.kernel.org, Ulf Hansson <ulf.hansson@...aro.org>,
        Adrian Hunter <adrian.hunter@...el.com>
Cc:     AKASHI Takahiro <takahiro.akashi@...aro.org>,
        Ben Chuang <ben.chuang@...esyslogic.com.tw>,
        greg.tu@...esyslogic.com.tw, Renius Chen <reniuschengl@...il.com>,
        Masami Hiramatsu <masami.hiramatsu@...aro.org>,
        Takao Orito <orito.takao@...ionext.com>,
        linux-kernel@...r.kernel.org
Subject: [PATCH 0/4] mmc: core: Preparations to support SD UHS-II cards

A series [1] that has been collaborative worked upon by Takahiro Akashi
(Linaro) and Ben Chuang (Genesys Logic) is targeting to add SD UHS-II support
to the mmc subsystem.

Throughout the reviews, we realized that the changes affecting the mmc core to
support the UHS-II interface/protocol might not be entirely straightforward to
implement. Especially, I expressed some concerns about the code that manages
power on/off, initialization and power management of a SD UHS-II card.

Therefore, I have posted this small series to try to help to put some of the
foundation in the mmc core in place. Hopefully this can provide some guidance
and an overall structure, of how I think the code could evolve.

More details are available in the commit messages and through comments in the
code, for each path.

Kind regards
Uffe

[1]
https://lkml.org/lkml/2020/11/5/1472

Ulf Hansson (4):
  mmc: core: Cleanup printing of speed mode at card insertion
  mmc: core: Prepare to support SD UHS-II cards
  mmc: core: Announce successful insertion of an SD UHS-II card
  mmc: core: Extend support for mmc regulators with a vqmmc2

 drivers/mmc/core/Makefile    |   2 +-
 drivers/mmc/core/bus.c       |  38 +++--
 drivers/mmc/core/core.c      |  17 ++-
 drivers/mmc/core/core.h      |   1 +
 drivers/mmc/core/host.h      |   5 +
 drivers/mmc/core/regulator.c |  34 +++++
 drivers/mmc/core/sd_uhs2.c   | 289 +++++++++++++++++++++++++++++++++++
 include/linux/mmc/card.h     |   6 +
 include/linux/mmc/host.h     |  30 ++++
 9 files changed, 404 insertions(+), 18 deletions(-)
 create mode 100644 drivers/mmc/core/sd_uhs2.c

-- 
2.25.1