kernel/linux.git/include/linux/mmc/host.h, branch v4.19.16

mmc: core: Drop the unused mmc_power_save|restore_host()

2018-07-16T09:21:45+00:00

The last user of mmc_power_save|restore_host() APIs is gone, hence let's drop them. Drop also the corresponding bus_ops callback, ->power_save|restore() as those becomes redundant. Cc: Tony Lindgren Cc: Eyal Reizer Signed-off-by: Ulf Hansson

mmc: core: more fine-grained hooks for HS400 tuning

2018-07-16T09:21:45+00:00

This adds two new HS400 tuning operations: * hs400_downgrade * hs400_complete These supplement the existing HS400 operation: * prepare_hs400_tuning This is motivated by a requirement of Renesas SDHI for the following: 1. Disabling SCC before selecting to HS if selection of HS400 has occurred. This can be done in an implementation of prepare_hs400_tuning_downgrade 2. Updating registers after switching to HS400 This can be done in an implementation of complete_hs400_tuning If hs400_downgrade or hs400_complete are not implemented then they are not called. Thus means there should be no affect for existing drivers as none implemt these ops. Signed-off-by: Simon Horman Signed-off-by: Ulf Hansson

mmc: core: add tunable delay waiting for power to be stable

2018-05-21T08:38:50+00:00

The hard-coded 10ms delay in mmc_power_up came from commit 79bccc5aefb4 ("mmc: increase power up delay"), which said "The TI controller on Toshiba Tecra M5 needs more time to power up or the cards will init incorrectly or not at all." But it's too engineering solution for a special board but force all platforms to wait for that long time, especially painful for mmc_power_up for eMMC when booting. However, it's added since 2009, and we can't tell if other platforms benefit from it. But in practise, the modern hardware are most likely to have a stable power supply with 1ms after setting it for no matter PMIC or discrete power. And more importnatly, most regulators implement the callback of ->set_voltage_time_sel() for regulator core to wait for specific period of time for the power supply to be stable, which means once regulator_set_voltage_* return, the power should reach the the minimum voltage that works for initialization. Of course, if there are some other ways for host to power the card, we should allow them to argue a suitable delay as well. With this patch, we could assign the delay from firmware, or we could assigne it via ->set_ios() callback from host drivers. Signed-off-by: Shawn Lin Signed-off-by: Ulf Hansson

Merge branch 'sdhci_omap' into next

2018-05-03T08:34:06+00:00

Merge immutable branch for sdhci-omap to add UHS/HS200 mode support. Signed-off-by: Ulf Hansson

mmc: sdhci: Disable 1.8v modes (HS200/HS400/UHS) if controller can't support 1.8v

2018-05-03T07:36:19+00:00

The SDHCI controller in a SoC might support HS200/HS400 (indicated using mmc-hs200-1_8v/mmc-hs400-1_8v dt property), but if the board is modeled such that the IO lines are not connected to 1.8v then HS200/HS400 cannot be supported. Disable HS200/HS400 if the board does not have 1.8v connected to the IO lines. Also Disable DDR/UHS in 1.8v if the IO lines are not connected to 1.8v. Signed-off-by: Kishon Vijay Abraham I Acked-by: Tony Lindgren Signed-off-by: Ulf Hansson

mmc: core: Add capability to avoid 3.3V signaling

2018-05-02T13:08:44+00:00

Some SD host controllers cannot handle extended use of 3.3V signaling. To accommodate these controllers, add a capability that requires us to negotiate the voltage down from 3.3V during card initialization. Signed-off-by: Kyle Roeschley Signed-off-by: Jennifer Dahm Signed-off-by: Ulf Hansson

mmc: core: Remove code no longer needed after the switch to blk-mq

2017-12-11T12:05:58+00:00

Remove code no longer needed after the switch to blk-mq. Signed-off-by: Adrian Hunter Acked-by: Linus Walleij Tested-by: Linus Walleij Signed-off-by: Ulf Hansson

mmc: block: blk-mq: Add support for direct completion

2017-12-11T11:44:35+00:00

For blk-mq, add support for completing requests directly in the ->done callback. That means that error handling and urgent background operations must be handled by recovery_work in that case. Signed-off-by: Adrian Hunter Acked-by: Linus Walleij Signed-off-by: Ulf Hansson Tested-by: Linus Walleij

mmc: core: Add parameter use_blk_mq

2017-12-11T11:44:33+00:00

Until mmc has blk-mq support fully implemented and tested, add a parameter use_blk_mq, set to true if config option MMC_MQ_DEFAULT is selected, which it is by default. Signed-off-by: Adrian Hunter Acked-by: Linus Walleij Signed-off-by: Ulf Hansson Tested-by: Linus Walleij

mmc: parse new binding for eMMC fixed driver type

2017-10-30T10:50:38+00:00

Parse the new binding and store it in the host struct after doing some sanity checks. The code is designed to support fixed SD driver type if we ever need that. Signed-off-by: Wolfram Sang Reviewed-by: Simon Horman Signed-off-by: Ulf Hansson