[PATCH v12 0/6] ARM: sunxi: Add driver for SD/MMC hosts found on Allwinner sunxi SoCs

[Hans de Goede]

Hi All,

Here is v12 of the sunxi-mmc patch-set David Lanzendörfer and I have been
working on, the mmc driver itself is unchanged from v11. New this version are
some dts patch changes, see below.

The first patch in this series is the patch adding the actual mmc driver and
should go in through the mmc tree.

All the other patches are devicetree patches adding / using the new fixed
reg_vcc3v3 supply to all sunxi board files, and should go upstream through
Maxime's sunxi-dts tree.

Changes since v1:
-Using mmc_of_parse instead of diy dt parsing
-Adding nodes for all mmc controller to the dtsi files,
 including sofar unused controllers
-Using generic GPIO slot library for WP/CD
-Adding additional MMC device nodes into DTSI files

Changes since v2:
-Add missing Signed-off-by tags
-Stop using __raw_readl / __raw_writel so that barriers are properly used
-Adding missing new lines
-Adding missing patch for automatic reparenting of clocks

Changes since v3:
-Move clk_enable / disable into host_init / exit (Hans)
-Fix hang on boot caused by irq storm (Hans)

Changes since v4:
-moving sunxi-mci.{c/h} to sunxi-mmc.{c/h}
-removing camel cases from the defines in  sunxi-mmc.h
-moving defines out of the struct definition
 since this is bad coding style
-adding documentation for the device tree binding
Changes since v5:
-adding host initialization for when the sdio irq is enabled
 (just to make sure having a defined state at all time)
-add mmc support fixup: set pullup on cd pins
-fixup: Don't set MMC_CAP_NEEDS_POLL /  MMC_CAP_4_BIT_DATA

Changes since v6:
-fixing copyright info in sunxi-mmc.*
-s/__SUNXI_MCI_H__/__SUNXI_MMC_H__/g
-s/SDXC_RESPONSE_/SDXC_RESP_/g
-s/define/definitions <- Comment from Priit Laes

Changes since v7:
-Merge sunxi-mmc.h into sunxi-mmc.c
-Various style fixes / cleanups based on Maxime's review
-sun6i support
-Fix a race condition in interrupt / tasklet interaction
-Split the dts patches into 3 per platform:
 1) Add mmc nodes to the dtsi
 2) Add mmc pinmux to the dtsi
 3) Add mmc nodes to the various board files
-Moved setting of bus-width and cd gpio polarity from .dtsi to the board-files
-Added sun6i dts patches

Changes since v8:
-Don't claim MMC_CAP_SDIO_IRQ by default, sdio-irq support appears to not
 always be reliable. Can be re-added to the caps on a per board basis
 through dts
-Added EXPORT_SYMBOL(clk_sunxi_mmc_phase_control)
-Moved bus-width and cd-inverted dts attributes for sun6i from dtsi to dts
-Squashed patches adding sun6i-a31-m9.dts and mmc support for m9 together
-Added a patch enabling the sdio wifi on the cubietruck in dts

Changes since v9:
-Drop the sun5i and sun6i dts pinmux patches as those have already been
 accepted
-Rename the mmc clock for the controller from "mod" to "mmc" so as
 to not confuse it with a regular mod0 clock
-Rename pinmux for the reference design card-detect pin from cd_pin_a to
 cd_pin_reference_design

Changes since v10:
-Dropped all dts and clk patches, as they are all accepted now
-Cleanup some somewhat weird names (leftovers from the android code):
 s/mci_readl/mmc_readl/
 s/mci_writel/mmc_write/
 s/smc_host/host/
-Switched to mmc_regulator_get_supply API and added fixed regulator nodes to
 all board files (introducing new dts patches)
-Got rid of duplicate ios info
-Stop checking card-detect before each request
-Drop usleep after changing the clock rate
-Drop incomplete / wrong voltage switching support
-Drop the large comment with values copy/pasted from the spec
-Move enable/disable clk + reset + irq calls from power up / down to
 probe / remove
-Make sunxi_mmc_clk_set_rate / sunxi_mmc_oclk_onoff return an error
-Use a threaded interrupt handler for sending an explicit stop on data errors
-Fix sunxi_mmc_send_manual_stop to properly stop ongoing SD_IO_RW_EXTENDED cmds

Changes since v11:
-Instead of adding a reg_vmmc0 regulator add a fixed reg_vcc3v3 regulator, as
 we may need it in other places too
-Also add a vmmc-supply entry to thr non mmc0 nodes on the 2 boards which have
 multiple sdcard slots.

Regards,

Hans