[PATCH V7 0/3] mmc: mmci: add busy detect for stm32 sdmmc variant

[Ludovic Barre]

From: Ludovic Barre <ludovic.barre@xxxxxx>

This patch series adds busy detect for stm32 sdmmc variant.
Some adaptations are required:
-On sdmmc the data timer is started on data transfert
and busy state, so we must add hardware busy timeout support.
-Add busy_complete callback at mmci_host_ops to allow to define
a specific busy completion by variant.
-Add sdmmc busy_complete callback.

V7:
-Patch 1/3: rephrasing like proposed (thx ulf)
-If busy timeout is undefined => increase to 10s
-Keep busy_detect.
-Patch 3/3: rephrasing comment header
-Avoid twice read of status register
-Avoid writing in MMCIMASK0 & MMCICLEAR if not modified

V6:
-mmci_start_command: set datatimer only on rsp_busy flag
(remove host->mrq->data).
-move max_busy_timeout in set_ios callback.
-typo fix: err_msk, clks on one lines.

V5:
-Replaces !cmd->data to !host->mrq->data to avoid overwrite
 of datatimer register by the first command (cmd23, without data) of
 SBC request.

V4:
-Re-work with busy_complete callback
-In series, move "mmc: mmci: add hardware busy timeout feature" in
first to simplify busy_complete prototype with err_msk parameter.

V3:
-rebase on latest mmc next
-replace re-read by status parameter. 

V2:
-mmci_cmd_irq cleanup in separate patch.
-simplify the busy_detect_flag exclude
-replace sdmmc specific comment in
"mmc: mmci: avoid fake busy polling in mmci_irq"
to focus on common behavior

Ludovic Barre (3):
  mmc: mmci: add hardware busy timeout feature
  mmc: mmci: add busy_complete callback
  mmc: mmci: sdmmc: add busy_complete callback

 drivers/mmc/host/mmci.c             | 178 +++++++++++++++++-----------
 drivers/mmc/host/mmci.h             |   5 +
 drivers/mmc/host/mmci_stm32_sdmmc.c |  42 +++++++
 3 files changed, 159 insertions(+), 66 deletions(-)

-- 
2.17.1