linux-kernel - [PATCH v5 00/14] mmc: sdhci-omap: Add UHS/HS200 mode support

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Date:   Fri, 27 Apr 2018 17:17:09 +0530
From:   Kishon Vijay Abraham I <kishon@...com>
To:     Ulf Hansson <ulf.hansson@...aro.org>,
        Adrian Hunter <adrian.hunter@...el.com>
CC:     Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        <linux-mmc@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <linux-omap@...r.kernel.org>,
        <kishon@...com>
Subject: [PATCH v5 00/14] mmc: sdhci-omap: Add UHS/HS200 mode support

Add UHS/HS200 mode support in sdhci-omap. The programming sequence
for voltage switching, tuning is followed from AM572x TRM
http://www.ti.com/lit/ug/spruhz6j/spruhz6j.pdf
(Similar to all AM57x/DRA7x SoCs). The patch series also implements
workaround for errata published in
http://www.ti.com/lit/er/sprz429l/sprz429l.pdf

patches are created on top of
git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc.git next

The patches along with dt has also been pushed to
https://github.com/kishon/linux-wip.git sdhci_uhs_v5

Changes from v4:
*) Added comment in sdhci for disabling HS200/HS400 mode
*) Fixed a couple of chunks in "Program a relatively accurate SW timeout
   value" which were missed in the previous revision
*) Added a patch in sdhci-omap to get IODelay values of 3.3v DDR mode.
*) Added pinctrl binding documentation for sdhci-omap which was missed
   before.

Changes from v3:
*) Fixed Adrian's comment on error handling when __sdhci_add_host()
   fails
*) Used Adrian's patches for programming SW timeout value.

Changes from v2:
*) Patches in v2 already applied to mmc -next are dropped from the
   series.
*) Changed SW timeout logic as per Adrians's suggestion
*) Validated SDIO with the current patches (added a couple of fixes
   found while adding SDIO support).
*) Used soc_device_match() instead of pdata-quirks as per Tony's
   suggestions.

Changes from v1:
*) Only poll on DAT0 and DATI for card_busy status
*) Cleanup iodelay patch as suggested by Tony.
*) Added quirk to disable HW timeout
*) Use the existing data timer but program a relatively accurate
   SW timeout value (Impacts all platforms)
*) Fix a bug in sdhci which was using data_timer for non data line
   commands

Adrian Hunter (2):
  mmc: sdhci: Add quirk to disable HW timeout
  mmc: sdhci: Factor out target_timeout calculation

Kishon Vijay Abraham I (12):
  mmc: sdhci-omap: Fix when capabilities are obtained from
    SDHCI_CAPABILITIES reg
  mmc: sdhci-omap: Remove setting ADMA capability in driver
  mmc: sdhci-omap: Workaround for Errata i843
  mmc: sdhci-omap: Invoke sdhci_get_of_property to read sdhci dt
    properties
  mmc: sdhci: Disable 1.8v modes (HS200/HS400/UHS) if controller can't
    support 1.8v
  mmc: sdhci: Program a relatively accurate SW timeout value
  mmc: sdhci-omap: Workaround for Errata i834
  dt-bindings: sdhci-omap: Add K2G specific binding
  mmc: sdhci-omap: Add support for MMC/SD controller in k2g SoC
  mmc: sdhci-omap: Add sdhci_omap specific ops for enable_sdio_irq
  dt-bindings: sdhci-omap: Add pinctrl bindings
  mmc: sdhci-omap: Get IODelay values for 3.3v DDR mode

 .../devicetree/bindings/mmc/sdhci-omap.txt    |   7 +
 drivers/mmc/host/sdhci-omap.c                 |  92 +++++++++--
 drivers/mmc/host/sdhci.c                      | 148 ++++++++++++++----
 drivers/mmc/host/sdhci.h                      |  15 ++
 include/linux/mmc/host.h                      |   4 +
 5 files changed, 226 insertions(+), 40 deletions(-)

-- 
2.17.0