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mirror of https://github.com/edk2-porting/linux-next.git synced 2024-12-25 21:54:06 +08:00
linux-next/drivers/mmc/core
Adrian Hunter d23029332c mmc: mmc: Improve reliability of mmc_select_hs400()
mmc_select_hs400() calls __mmc_switch() which checks the switch is
successful using CMD13 (SEND_STATUS).  The problem is that it does that
using the timing settings of the previous mode.  That is prone to error,
especially when switching from HS to HS400 because the timing parameters
for HS mode are tighter than the timing parameters for HS400 mode.

In the case when CMD13 polling is used (i.e. not MMC_CAP_WAIT_WHILE_BUSY)
with the switch command, it must be assumed that using different modes on
the card and host must work.

However in the case when CMD13 polling is not used
(i.e. MMC_CAP_WAIT_WHILE_BUSY) mmc_select_hs400() can be made more
reliable by setting the host to the correct timing before sending CMD13.

This patch does that.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: <stable@vger.kernel.org> # 4.2+
Tested-by: Alim Akhtar <alim.akhtar@samsung.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2015-11-09 13:16:32 +01:00
..
bus.c Revert "mmc: core: Convert mmc_driver to device_driver" 2015-04-17 11:48:01 +02:00
bus.h mmc: rename dev_to_mmc_card() to mmc_dev_to_card() 2010-10-23 21:11:12 +08:00
core.c mmc: core: Add mmc_regulator_set_vqmmc() 2015-10-26 16:00:10 +01:00
core.h mmc: core: Remove MMC_CLKGATE 2015-10-26 16:00:09 +01:00
debugfs.c mmc: core: Remove MMC_CLKGATE 2015-10-26 16:00:09 +01:00
host.c mmc: core: Add DT bindings for eMMC hardware reset support 2015-10-27 10:21:15 +01:00
host.h mmc: host: Add facility to support re-tuning 2015-06-01 09:06:53 +02:00
Kconfig mmc: core: Remove MMC_CLKGATE 2015-10-26 16:00:09 +01:00
Makefile mmc: pwrseq: add driver for emmc hardware reset 2015-02-04 09:45:09 +01:00
mmc_ops.c mmc: mmc: extend the mmc_send_tuning() 2015-10-27 10:38:41 +01:00
mmc_ops.h mmc: core: Convert __mmc_switch() into an internal core function 2015-10-26 15:59:54 +01:00
mmc.c mmc: mmc: Improve reliability of mmc_select_hs400() 2015-11-09 13:16:32 +01:00
pwrseq_emmc.c mmc: pwrseq: Use highest priority for eMMC restart handler 2015-10-27 11:11:06 +01:00
pwrseq_simple.c mmc: pwrseq_simple: use GPIO descriptors array API 2015-10-26 15:59:59 +01:00
pwrseq.c mmc: pwrseq: Fix error code propagation in mmc_pwrseq_simple_alloc() 2015-04-17 10:17:19 +02:00
pwrseq.h mmc: pwrseq: simplify alloc/free hooks 2015-03-23 14:13:42 +01:00
quirks.c mmc: core: Remove MMC_CLKGATE 2015-10-26 16:00:09 +01:00
sd_ops.c mmc: sd: warn if card stays busy during init 2014-07-09 11:26:07 +02:00
sd_ops.h mmc: add erase, secure erase, trim and secure trim operations 2010-08-12 08:43:30 -07:00
sd.c mmc: skip reclaiming host on mmc_add_card() error 2015-10-26 16:00:14 +01:00
sd.h mmc: drop the speed mode of card's state 2014-05-12 18:05:53 -04:00
sdio_bus.c mmc: core: Attach PM domain prior probing of SDIO func driver 2015-06-04 10:03:51 +02:00
sdio_bus.h
sdio_cis.c mmc: sdio: Change pr_warning to pr_warn_ratelimited 2012-07-22 15:25:48 -04:00
sdio_cis.h sdio: split up common and function CIS parsing 2007-09-23 20:44:22 +02:00
sdio_io.c mmc: sdio: Use multiple scatter/gather list 2012-12-06 13:54:43 -05:00
sdio_irq.c mmc: core: Remove MMC_CLKGATE 2015-10-26 16:00:09 +01:00
sdio_ops.c mmc: sdio: Use multiple scatter/gather list 2012-12-06 13:54:43 -05:00
sdio_ops.h mmc: Add mmc_is_io_op helper function 2015-10-26 16:00:01 +01:00
sdio.c mmc: core: Remove MMC_CLKGATE 2015-10-26 16:00:09 +01:00
slot-gpio.c mmc: slot-gpio: Allow host driver to provide isr for card-detect interrupts 2015-01-19 09:56:29 +01:00
slot-gpio.h mmc: slot-gpio: Make mmc_gpio_alloc() available for MMC core 2015-01-19 09:56:17 +01:00