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path: root/drivers/mmc/host/sdhci-sprd.c
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2024-04-26mmc: sdhci-sprd: Constify struct sdhci_opsKrzysztof Kozlowski
The local struct sdhci_ops can be made const for code safety. Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org> Acked-by: Adrian Hunter <adrian.hunter@intel.com> Reviewed-by: Baolin Wang <baolin.wang@linux.alibaba.com> Link: https://lore.kernel.org/r/20240414-mmc-const-sdhci-ops-v2-3-262f81faadac@kernel.org Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2024-04-02mmc: sdhci-sprd: Remove unused of_gpio.hAndy Shevchenko
of_gpio.h is deprecated and subject to remove. The driver doesn't use it, simply remove the unused header. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Reviewed-by: Baolin Wang <baolin.wang@linux.alibaba.com> Acked-by: Adrian Hunter <adrian.hunter@intel.com> Link: https://lore.kernel.org/r/20240307114500.3643489-1-andriy.shevchenko@linux.intel.com Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2024-01-03mmc: sdhci-sprd: Fix eMMC init failure after hw resetWenchao Chen
Some eMMC devices that do not close the auto clk gate after hw reset will cause eMMC initialization to fail. Let's fix this. Signed-off-by: Wenchao Chen <wenchao.chen@unisoc.com> Fixes: ff874dbc4f86 ("mmc: sdhci-sprd: Disable CLK_AUTO when the clock is less than 400K") Reviewed-by: Baolin Wang <baolin.wang@linux.alibaba.com> Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/20231204064934.21236-1-wenchao.chen@unisoc.com Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2023-11-23mmc: sdhci-sprd: Fix vqmmc not shutting down after the card was pulledWenchao Chen
With cat regulator_summary, we found that vqmmc was not shutting down after the card was pulled. cat /sys/kernel/debug/regulator/regulator_summary 1.before fix 1)Insert SD card vddsdio 1 1 0 unknown 3500mV 0mA 1200mV 3750mV 71100000.mmc-vqmmc 1 0mA 3500mV 3600mV 2)Pull out the SD card vddsdio 1 1 0 unknown 3500mV 0mA 1200mV 3750mV 71100000.mmc-vqmmc 1 0mA 3500mV 3600mV 2.after fix 1)Insert SD cardt vddsdio 1 1 0 unknown 3500mV 0mA 1200mV 3750mV 71100000.mmc-vqmmc 1 0mA 3500mV 3600mV 2)Pull out the SD card vddsdio 0 1 0 unknown 3500mV 0mA 1200mV 3750mV 71100000.mmc-vqmmc 0 0mA 3500mV 3600mV Fixes: fb8bd90f83c4 ("mmc: sdhci-sprd: Add Spreadtrum's initial host controller") Signed-off-by: Wenchao Chen <wenchao.chen@unisoc.com> Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/20231115083406.7368-1-wenchao.chen@unisoc.com Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2023-09-26mmc: sdhci-sprd: Fix error code in sdhci_sprd_tuning()Dan Carpenter
Return an error code if sdhci_sprd_get_best_clk_sample() fails. Currently, it returns success. Fixes: d83d251bf3c2 ("mmc: sdhci-sprd: Add SD HS mode online tuning") Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org> Reviewed-by: Wenchao Chen <wenchao.chen@unisoc.com> Reviewed-by: Baolin Wang <baolin.wang@linux.alibaba.com> Acked-by: Adrian Hunter <adrian.hunter@intel.com> Link: https://lore.kernel.org/r/a8af0a08-8405-43cc-bd83-85ff25f572ca@moroto.mountain Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2023-08-25mmc: sdhci-sprd: Add SD HS mode online tuningWenchao Chen
First of all, Unisoc's IC provides cmd delay and read delay to ensure that the host can get the correct data. However, according to SD Spec, there is no need to do tuning in high speed mode, but with the development of chip processes, it is more and more difficult to find a suitable delay to cover all the chips. Therefore, we need SD high speed mode online tuning. In addition, we added mmc_sd_switch() and mmc_send_status() to the header file to allow it to be usable by the driver. Signed-off-by: Wenchao Chen <wenchao.chen@unisoc.com> Link: https://lore.kernel.org/r/20230825091743.15613-3-wenchao.chen@unisoc.com Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2023-08-15mmc: sdhci-sprd: Convert to platform remove callback returning voidYangtao Li
The .remove() callback for a platform driver returns an int which makes many driver authors wrongly assume it's possible to do error handling by returning an error code. However the value returned is (mostly) ignored and this typically results in resource leaks. To improve here there is a quest to make the remove callback return void. In the first step of this quest all drivers are converted to .remove_new() which already returns void. Trivially convert this driver from always returning zero in the remove callback to the void returning variant. Cc: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Yangtao Li <frank.li@vivo.com> Acked-by: Adrian Hunter <adrian.hunter@intel.com> Acked-by: Chunyan Zhang <zhang.lyra@gmail.com> Link: https://lore.kernel.org/r/20230727070051.17778-35-frank.li@vivo.com Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2023-08-09mmc: Explicitly include correct DT includesRob Herring
The DT of_device.h and of_platform.h date back to the separate of_platform_bus_type before it as merged into the regular platform bus. As part of that merge prepping Arm DT support 13 years ago, they "temporarily" include each other. They also include platform_device.h and of.h. As a result, there's a pretty much random mix of those include files used throughout the tree. In order to detangle these headers and replace the implicit includes with struct declarations, users need to explicitly include the correct includes. Signed-off-by: Rob Herring <robh@kernel.org> Acked-by: Adrian Hunter <adrian.hunter@intel.com> Link: https://lore.kernel.org/r/20230718143054.1065288-1-robh@kernel.org Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2023-01-23mmc: sdhci-sprd: Replace SDHCI_QUIRK_MISSING_CAPSAdrian Hunter
SDHCI_QUIRK_MISSING_CAPS is not needed because sdhci_read_caps() can be called instead. In preparation to get rid of SDHCI_QUIRK_MISSING_CAPS, replace SDHCI_QUIRK_MISSING_CAPS with sdhci_read_caps(). __sdhci_read_caps() is also called from sdhci_setup_host() via sdhci_read_caps(), however only the first call to __sdhci_read_caps() does anything because after that host->read_caps has been set to true. Note, __sdhci_read_caps() does more than just set host->caps, such as do a reset, so calling __sdhci_read_caps() earlier could have unforeseen side-effects. However the code flow has been reviewed with that in mind. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Acked-by: Chunyan Zhang <zhang.lyra@gmail.com> Link: https://lore.kernel.org/r/20230113110011.129835-4-adrian.hunter@intel.com Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2022-12-09mmc: sdhci-sprd: Disable CLK_AUTO when the clock is less than 400KWenchao Chen
When the clock is less than 400K, some SD cards fail to initialize because CLK_AUTO is enabled. Fixes: fb8bd90f83c4 ("mmc: sdhci-sprd: Add Spreadtrum's initial host controller") Signed-off-by: Wenchao Chen <wenchao.chen@unisoc.com> Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/20221207051909.32126-1-wenchao.chen@unisoc.com Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2022-12-01mmc: sdhci-sprd: Fix no reset data and command after voltage switchWenchao Chen
After switching the voltage, no reset data and command will cause CMD2 timeout. Fixes: 29ca763fc26f ("mmc: sdhci-sprd: Add pin control support for voltage switch") Signed-off-by: Wenchao Chen <wenchao.chen@unisoc.com> Acked-by: Adrian Hunter <adrian.hunter@intel.com> Reviewed-by: Baolin Wang <baolin.wang@linux.alibaba.com> Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/20221130121328.25553-1-wenchao.chen@unisoc.com Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2022-10-11mmc: sdhci-sprd: Fix minimum clock limitWenchao Chen
The Spreadtrum controller supports 100KHz minimal clock rate, which means that the current value 400KHz is wrong. Unfortunately this has also lead to fail to initialize some cards, which are allowed to require 100KHz to work. So, let's fix the problem by changing the minimal supported clock rate to 100KHz. Signed-off-by: Wenchao Chen <wenchao.chen@unisoc.com> Acked-by: Adrian Hunter <adrian.hunter@intel.com> Fixes: fb8bd90f83c4 ("mmc: sdhci-sprd: Add Spreadtrum's initial host controller") Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/20221011104935.10980-1-wenchao.chen666@gmail.com [Ulf: Clarified to commit-message] Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2022-09-20mmc: sdhci-sprd: Fix the limitation of divWenchao Chen
Because the bit field size of the divider coefficient register is 1023, it is limited before returning the value. Signed-off-by: Wenchao Chen <wenchao.chen@unisoc.com> Link: https://lore.kernel.org/r/20220914063702.20283-1-wenchao.chen666@gmail.com Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2021-10-12mmc: sdhci-sprd: Wait until DLL locked after being configuredZhenxiong Lai
According to the specification, DLL status has to be locked before using it. Signed-off-by: Zhenxiong Lai <zhenxiong.lai@unisoc.com> Signed-off-by: Chunyan Zhang <chunyan.zhang@unisoc.com> Acked-by: Adrian Hunter <adrian.hunter@intel.com> Link: https://lore.kernel.org/r/20210926092835.146449-1-zhang.lyra@gmail.com Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2021-06-14mmc: sdhci-sprd: use sdhci_sprd_writewKrzysztof Kozlowski
The sdhci_sprd_writew() was defined by never used in sdhci_ops: drivers/mmc/host/sdhci-sprd.c:134:20: warning: unused function 'sdhci_sprd_writew' Reported-by: kernel test robot <lkp@intel.com> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com> Link: https://lore.kernel.org/r/20210601095403.236007-2-krzysztof.kozlowski@canonical.com Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2021-02-01mmc: sdhci-sprd: Fix some resource leaks in the remove functionChristophe JAILLET
'sdhci_remove_host()' and 'sdhci_pltfm_free()' should be used in place of 'mmc_remove_host()' and 'mmc_free_host()'. This avoids some resource leaks, is more in line with the error handling path of the probe function, and is more consistent with other drivers. Fixes: fb8bd90f83c4 ("mmc: sdhci-sprd: Add Spreadtrum's initial host controller") Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> Acked-by: Orson Zhai <orson.zhai@gmail.com> Acked-by: Adrian Hunter <adrian.hunter@intel.com> Link: https://lore.kernel.org/r/20201217204236.163446-1-christophe.jaillet@wanadoo.fr Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2020-11-24mmc: sdhci-sprd: drop of_match_ptr from of_device_id tableKrzysztof Kozlowski
The driver can match only via the DT table so the table should be always used and the of_match_ptr does not have any sense (this also allows ACPI matching via PRP0001, even though it is not relevant here). This fixes compile warning (!CONFIG_OF on x86_64): drivers/mmc/host/sdhci-sprd.c:723:34: warning: ‘sdhci_sprd_of_match’ defined but not used [-Wunused-const-variable=] Reported-by: kernel test robot <lkp@intel.com> Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org> Acked-by: Chunyan Zhang <zhang.lyra@gmail.com> Link: https://lore.kernel.org/r/20201120162344.485921-1-krzk@kernel.org Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2020-09-25mmc: sdhci: fix indentation mistakesKrzysztof Kozlowski
Fix inconsistent indenting, reported by Smatch: drivers/mmc/host/sdhci-esdhc-imx.c:1380 sdhci_esdhc_imx_hwinit() warn: inconsistent indenting drivers/mmc/host/sdhci-sprd.c:390 sdhci_sprd_request_done() warn: inconsistent indenting Reported-by: kernel test robot <lkp@intel.com> Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org> Link: https://lore.kernel.org/r/20200923153739.30327-2-krzk@kernel.org Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2020-09-07mmc: Set PROBE_PREFER_ASYNCHRONOUS for drivers that existed in v5.4Douglas Anderson
This is like commit 3d3451124f3d ("mmc: sdhci-msm: Prefer asynchronous probe") but applied to a whole pile of drivers. This batch converts the drivers that appeared to be around in the v5.4 timeframe. Signed-off-by: Douglas Anderson <dianders@chromium.org> Link: https://lore.kernel.org/r/20200903162412.5.I2b630c4d40ff4ea61d5b30b8ccfe95890e257100@changeid Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2020-08-23treewide: Use fallthrough pseudo-keywordGustavo A. R. Silva
Replace the existing /* fall through */ comments and its variants with the new pseudo-keyword macro fallthrough[1]. Also, remove unnecessary fall-through markings when it is the case. [1] https://www.kernel.org/doc/html/v5.7/process/deprecated.html?highlight=fallthrough#implicit-switch-case-fall-through Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
2020-05-28mmc: host: sdhci-sprd: Implement the request_atomic() APIBaolin Wang
Implement the request_atomic() API for nonremovable cards, that means we can submit next request in the irq hard handler context to reduce latency. Moreover factor out the AUTO CMD23 checking into a separate function to reduce duplicate code. Signed-off-by: Baolin Wang <baolin.wang7@gmail.com> Acked-by: Adrian Hunter <adrian.hunter@intel.com> Link: https://lore.kernel.org/r/60142fe6c6c1dbba2696e775564ae2166786f0bc.1586744073.git.baolin.wang7@gmail.com Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2020-05-28mmc: host: Prepare host drivers for mmc_regulator_set_vqmmc() returning > 0Marek Vasut
Patch all drivers which use mmc_regulator_set_vqmmc() and prepare them for the fact that mmc_regulator_set_vqmmc() can return a value > 0, which would happen if the signal voltage switch did NOT happen, because the voltage was already set correctly. Signed-off-by: Marek Vasut <marex@denx.de> Link: https://lore.kernel.org/r/20200416163649.336967-1-marex@denx.de [Ulf: Re-worked/simplified the code a bit] Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2020-05-28mmc: sdhci-sprd: Drop redundant cap flagsUlf Hansson
The MMC_CAP_ERASE and MMC_CAP_CMD23 flags are already being set in the common sdhci_setup_host(). This makes it redundant to set them for sdhci-sprd, so let's drop them. Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> Reviewed-by: Baolin Wang <baolin.wang7@gmail.com> Acked-by: Adrian Hunter <adrian.hunter@intel.com> Link: https://lore.kernel.org/r/20200406113724.8504-1-ulf.hansson@linaro.org
2020-03-24mmc: sdhci-sprd: Set the missing MMC_CAP_WAIT_WHILE_BUSY flagBaolin Wang
The Spreadtrum host controller supports HW busy detection for commands with R1B responses, but also for I/O operations. This means when the host gets a transfer complete event, that always indicates the busy signal is released. Let's inform the mmc core about this, via setting the corresponding MMC_CAP_WAIT_WHILE_BUSY flag, as to remove some redundant software busy polling. Signed-off-by: Baolin Wang <baolin.wang7@gmail.com> Acked-by: Adrian Hunter <adrian.hunter@intel.com> Link: https://lore.kernel.org/r/96f16647f6a6e8cb058c44e46c61b122df027059.1582535202.git.baolin.wang7@gmail.com Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2020-03-24mmc: host: sdhci-sprd: Add software queue supportBaolin Wang
Add software queue support to improve the performance. Signed-off-by: Baolin Wang <baolin.wang@linaro.org> Signed-off-by: Baolin Wang <baolin.wang7@gmail.com> Link: https://lore.kernel.org/r/f629b32943aae9e30ffa17acf4af06c270417001.1581478569.git.baolin.wang7@gmail.com Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2019-08-30mmc: sdhci-sprd: clear the UHS-I modes read from registersChunyan Zhang
sprd's sd host controller supports SDR50/SDR104/DDR50 though, the UHS-I mode used by the specific card can be selected via devicetree only. Fixes: fb8bd90f83c4 ("mmc: sdhci-sprd: Add Spreadtrum's initial host controller") Signed-off-by: Chunyan Zhang <chunyan.zhang@unisoc.com> Signed-off-by: Chunyan Zhang <zhang.lyra@gmail.com> Reviewed-by: Baolin Wang <baolin.wang@linaro.org> Tested-by: Baolin Wang <baolin.wang@linaro.org> Cc: stable@vger.kernel.org Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2019-08-30mms: sdhci-sprd: add SDHCI_QUIRK_BROKEN_CARD_DETECTIONChunyan Zhang
sprd's sd host controller doesn't support detection to card insert or remove. Fixes: fb8bd90f83c4 ("mmc: sdhci-sprd: Add Spreadtrum's initial host controller") Signed-off-by: Chunyan Zhang <chunyan.zhang@unisoc.com> Signed-off-by: Chunyan Zhang <zhang.lyra@gmail.com> Reviewed-by: Baolin Wang <baolin.wang@linaro.org> Tested-by: Baolin Wang <baolin.wang@linaro.org> Cc: stable@vger.kernel.org Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2019-08-30mmc: sdhci-sprd: add SDHCI_QUIRK2_PRESET_VALUE_BROKENChunyan Zhang
The bit of PRESET_VAL_ENABLE in HOST_CONTROL2 register is reserved on sprd's sd host controller, set quirk2 to disable configuring this. Fixes: fb8bd90f83c4 ("mmc: sdhci-sprd: Add Spreadtrum's initial host controller") Signed-off-by: Chunyan Zhang <chunyan.zhang@unisoc.com> Signed-off-by: Chunyan Zhang <zhang.lyra@gmail.com> Reviewed-by: Baolin Wang <baolin.wang@linaro.org> Tested-by: Baolin Wang <baolin.wang@linaro.org> Cc: stable@vger.kernel.org Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2019-08-30mmc: sdhci-sprd: add get_ro hook functionChunyan Zhang
sprd's sd host controller doesn't support write protect to sd card. Fixes: fb8bd90f83c4 ("mmc: sdhci-sprd: Add Spreadtrum's initial host controller") Signed-off-by: Chunyan Zhang <chunyan.zhang@unisoc.com> Signed-off-by: Chunyan Zhang <zhang.lyra@gmail.com> Reviewed-by: Baolin Wang <baolin.wang@linaro.org> Tested-by: Baolin Wang <baolin.wang@linaro.org> Cc: stable@vger.kernel.org Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2019-08-30mmc: sdhci-sprd: fixed incorrect clock dividerChunyan Zhang
The register SDHCI_CLOCK_CONTROL should be cleared before config clock divider, otherwise the frequency configured maybe lower than we expected. Fixes: fb8bd90f83c4 ("mmc: sdhci-sprd: Add Spreadtrum's initial host controller") Signed-off-by: Chunyan Zhang <chunyan.zhang@unisoc.com> Signed-off-by: Chunyan Zhang <zhang.lyra@gmail.com> Reviewed-by: Baolin Wang <baolin.wang@linaro.org> Tested-by: Baolin Wang <baolin.wang@linaro.org> Cc: stable@vger.kernel.org Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2019-08-06mmc: sdhci-sprd: Fix the incorrect soft reset operation when runtime resumingBaolin Wang
The SD host controller specification defines 3 types software reset: software reset for data line, software reset for command line and software reset for all. Software reset for all means this reset affects the entire Host controller except for the card detection circuit. In sdhci_runtime_resume_host() we always do a software "reset for all", which causes the Spreadtrum variant controller to work abnormally after resuming. To fix the problem, let's do a software reset for the data and the command part, rather than "for all". However, as sdhci_runtime_resume() is a common sdhci function and we don't want to change the behaviour for other variants, let's introduce a new in-parameter for it. This enables the caller to decide if a "reset for all" shall be done or not. Signed-off-by: Baolin Wang <baolin.wang@linaro.org> Fixes: fb8bd90f83c4 ("mmc: sdhci-sprd: Add Spreadtrum's initial host controller") Cc: stable@vger.kernel.org Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2019-07-22mmc: host: sdhci-sprd: Fix the missing pm_runtime_put_noidle()Baolin Wang
When the SD host controller tries to probe again due to the derferred probe mechanism, it will always keep the SD host device as runtime resume state due to missing the runtime put operation in error path last time. Thus add the pm_runtime_put_noidle() in error path to make the PM runtime counter balance, which can make the SD host device's PM runtime work well. Signed-off-by: Baolin Wang <baolin.wang@linaro.org> Acked-by: Adrian Hunter <adrian.hunter@intel.com> Fixes: fb8bd90f83c4 ("mmc: sdhci-sprd: Add Spreadtrum's initial host controller") Cc: stable@vger.kernel.org Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2019-07-10mmc: sdhci-sprd: Add pin control support for voltage switchBaolin Wang
For Spreadtrum SD card voltage switching, besides regulator setting, it also need switch related pin's state to output corresponding voltage. This patch adds pin control operation to support voltage switch. Signed-off-by: Baolin Wang <baolin.wang@linaro.org> Acked-by: Adrian Hunter <adrian.hunter@intel.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2019-07-10mmc: sdhci-sprd: Add start_signal_voltage_switch opsBaolin Wang
For Spreadtrum SD host controller, we can not use standard SD registers to change and detect the I/O voltage signals, since our voltage regulator for I/O is fixed in hardware, and no signals were connected to the SD controller. Thus add Spreadtrum specific voltage switch ops to change voltage instead of using standard SD host registers. Signed-off-by: Baolin Wang <baolin.wang@linaro.org> Acked-by: Adrian Hunter <adrian.hunter@intel.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2019-06-10mmc: sdhci-sprd: Add PHY DLL delay configurationBaolin Wang
Set the PHY DLL delay for each timing mode, which is used to sample the clock accurately and make the clock more stable. Signed-off-by: Baolin Wang <baolin.wang@linaro.org> Acked-by: Adrian Hunter <adrian.hunter@intel.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2019-06-10mmc: sdhci-sprd: Enable PHY DLL to make clock stableBaolin Wang
For the Spreadtrum SD host controller, when we changed the clock to be more than 52M, we should enable the PHY DLL which is used to track the clock frequency to make the clock work more stable. Otherwise deviation may occur of the higher clock. Signed-off-by: Baolin Wang <baolin.wang@linaro.org> Acked-by: Adrian Hunter <adrian.hunter@intel.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2019-06-10mmc: sdhci-sprd: Add HS400 enhanced strobe modeBaolin Wang
Add HS400 enhanced strobe mode support for Spreadtrum SD host controller. Signed-off-by: Baolin Wang <baolin.wang@linaro.org> Acked-by: Adrian Hunter <adrian.hunter@intel.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2019-06-10mmc: sdhci-sprd: Implement the get_max_timeout_count() interfaceBaolin Wang
Implement the get_max_timeout_count() interface to set the Spredtrum SD host controller actual maximum timeout count. Signed-off-by: Baolin Wang <baolin.wang@linaro.org> Acked-by: Adrian Hunter <adrian.hunter@intel.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2019-06-10mmc: sdhci-sprd: Add optional gate clock supportBaolin Wang
For the Spreadtrum SC9860 platform, we should enable another gate clock '2x_enable' to make the SD host controller work well. Signed-off-by: Baolin Wang <baolin.wang@linaro.org> Acked-by: Adrian Hunter <adrian.hunter@intel.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2019-06-10mmc: sdhci-sprd: Check the enable clock's return value correctlyBaolin Wang
Missed to check the enable clock's return value, fix it. Signed-off-by: Baolin Wang <baolin.wang@linaro.org> Acked-by: Adrian Hunter <adrian.hunter@intel.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2018-10-08mmc: sdhci-sprd: Add Spreadtrum's initial host controllerChunyan Zhang
This patch adds the initial support of Secure Digital Host Controller Interface compliant controller found in some latest Spreadtrum chipsets. This patch has been tested on the version of SPRD-R11 controller. R11 is a variant based on SD v4.0 specification. With this driver, R11 mmc can be initialized, can be mounted, read and written. Original-by: Billows Wu <billows.wu@unisoc.com> Signed-off-by: Chunyan Zhang <chunyan.zhang@unisoc.com> Acked-by: Adrian Hunter <adrian.hunter@intel.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-02 15:39:23 +0000