- 04 Mar, 2014 9 commits
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Balaji T K authored
Add pbias regulator node as a child of system control module - syscon. Signed-off-by:
Balaji T K <balajitk@ti.com> Acked-by:
Tony Lindgren <tony@atomide.com> Tested-by:
Florian Vaussard <florian.vaussard@epfl.ch> Tested-by:
Stefan Roese <sr@denx.de> Signed-off-by:
Chris Ball <chris@printf.net>
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Balaji T K authored
In DT case, PBAIS registers are programmed via regulator, use regulator APIs to control PBIAS. Signed-off-by:
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Balaji T K authored
pbias register controls internal power supply to sd card i/o pads in most OMAPs (OMAP2-5, DRA7). Control bits for selecting voltage level and enabling/disabling are in the same PBIAS register. Signed-off-by:
Mark Brown <broonie@linaro.org> Tested-by:
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Balaji T K authored
handle vcc and vcc_aux independently to reduce indent. Signed-off-by:
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Balaji T K authored
Use devm_regulator API, while at it use devm_regulator_get_optional for optional vmmc_aux supply Signed-off-by:
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Daniel Mack authored
This should probably be done implicitly through mmc_of_parse(), but that doesn't play well along with the multi-slot model the hsmmc driver features. Hence, for now, do it manually. The properties are already documented in Documentation/devicetree/bindings/mmc/mmc.txt. Signed-off-by:
Daniel Mack <zonque@gmail.com> Acked-by:
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Nishanth Menon authored
MMC1 is the only MMC interface available on the platform. Further, since the platform is based on older revision of SoC which is not capable of doing multi-block reads, mark it with compatibility for the same and add pinmux to ensure that all relevant pins are configured for non-MMC boot mode. Signed-off-by:
Nishanth Menon <nm@ti.com> Acked-by:
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Nishanth Menon authored
When device is booted using devicetree, platforms impacted by Erratum 2.1.1.128 is not detected easily in the mmc driver. This erratum indicates that the module cannot do multi-block transfers. Platforms such as LDP which use OMAP3 ES revision prior to ES3.0 are impacted by this. Provide a new compatible property "ti,omap3-pre-es3-hsmmc" to allow driver to determine if driver needs to implement quirks associated with the specific module version (primarily because the IP revision information is not sufficient for the same). Signed-off-by:
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Dan Carpenter authored
Static checkers complain that testing for both "next" and "!next" is duplicative. Signed-off-by:
Dan Carpenter <dan.carpenter@oracle.com> Acked-by:
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- 03 Mar, 2014 7 commits
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Felipe Balbi authored
Fix the following build errors: drivers/mmc/host/dw_mmc-k3.c: In function ‘dw_mci_k3_suspend’: drivers/mmc/host/dw_mmc-k3.c:58:2: error: implicit declaration of function ‘dw_mci_suspend’ [-Werror=implicit-function-declaration] ret = dw_mci_suspend(host); ^ drivers/mmc/host/dw_mmc-k3.c: In function ‘dw_mci_k3_resume’: drivers/mmc/host/dw_mmc-k3.c:76:2: error: implicit declaration of function ‘dw_mci_resume’ [-Werror=implicit-function-declaration] return dw_mci_resume(host); ^ drivers/mmc/host/dw_mmc-k3.c: At top level: drivers/mmc/host/dw_mmc-k3.c:53:12: warning: ‘dw_mci_k3_suspend’ defined but not used [-Wunused-function] static int dw_mci_k3_suspend(struct device *dev) ^ drivers/mmc/host/dw_mmc-k3.c:65:12: warning: ‘dw_mci_k3_resume’ defined but not used [-Wunused-function] static int dw_mci_k3_resume(struct device *dev) ^ Signed-off-by:Felipe Balbi <balbi@ti.com> Acked-by:
Jaehoon Chung <jh80.chung@samsung.com> Signed-off-by:
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Tomasz Figa authored
This patch modifies sdhci_s3c_consider_clock() to fail if bus clock being considered can not provide frequency lower or equal requested, instead of returning the lowest supported. Signed-off-by:
Tomasz Figa <tomasz.figa@gmail.com> Tested-by:
Heiko Stuebner <heiko@sntech.de> Acked-by:
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Tomasz Figa authored
Currently the driver assumes at probe that controller is configured for last valid enumerated bus clock. This assumption is completely wrong, as there is no way to ensure such configuration until the hardware gets first configured (by calling sdhci_s3c_set_clock()). This patch modifies the driver to set current clock at probe to unknown state (represented by negative value) and make sure that the hardware gets actually configured to selected clock in sdhci_s3c_set_clock(). Signed-off-by:
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Tomasz Figa authored
This patch reimplements functions calculating minimum and maximum clock rates to leverage clock rate cache introduced by previous patches. In addition, the calculation is simplified to just comparing input clock rates (max case) or input clock rates divided by maximum divisor (min case), which is basically what the original code did, but with much more unnecessary work. Signed-off-by:
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Tomasz Figa authored
IS_ERR() must be used to make sure that not a valid clock was returned by clk_get() and company. Signed-off-by:
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Tomasz Figa authored
To fix scheduling while atomic happening in sdhci_s3c_set_clock() caused by calling clk_get_rate() that might sleep, this patch modifies the driver to cache rates of all bus clocks at probe time and then only use those cache values. Signed-off-by:
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Tomasz Figa authored
Current implementation of sdhci_s3c_consider_clock() is highly inefficient due to multiple integer divisions by variable performed in a loop. Since only divisors that are powers of two are considered, this patch replaces them with respective shifts, removing all the integer divisions. Signed-off-by:
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- 27 Feb, 2014 3 commits
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Dinh Nguyen authored
Introduce "altr,socfpga-dw-mshc" to enable Altera's SOCFPGA platform specific implementation of the dw_mmc driver. Also add the "syscon" binding to the "altr,sys-mgr" node. The clock driver can use the syscon driver to toggle the register for the SD/MMC clock phase shift settings. Finally, fix an indentation error for the sysmgr node. Signed-off-by:
Dinh Nguyen <dinguyen@altera.com> Acked-by:
Steffen Trumtrar <s.trumtrar@pengutronix.de> Tested-by:
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Dinh Nguyen authored
Like the rockchip, Altera's SOCFPGA platform specific implementation of the dw_mmc driver requires using the HOLD register for SD commands. This patch renames dw_mci_rockchip_prepare_command to dw_mci_pltfm_prepare_command so that SOCFPGA and Rockchip can use it. Signed-off-by:
Seungwon Jeon <tgih.jun@samsung.com> Signed-off-by:
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Dinh Nguyen authored
It turns now that the only really platform specific code that is needed for SOCFPGA is using the SDMMC_CMD_USE_HOLD_REG in the prepare_command function. Since the Rockchip already has this functionality, re-use the code that is already in dw_mmc-pltfm.c. Signed-off-by:
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- 25 Feb, 2014 10 commits
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Sachin Kamat authored
If mrq->sbc is not NULL but data->stop happens to be NULL, it will lead to NULL pointer dereferencing. Avoid this by having a NULL check for data->stop. Signed-off-by:
Sachin Kamat <sachin.kamat@linaro.org> Acked-by:
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Sachin Kamat authored
Commit c02cecb9 ("ARM: orion: move platform_data definitions") moved the file to the current location but forgot to remove the pointer to its previous location. Clean it up. While at it also change the header file protection macros appropriately. Signed-off-by:
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Sachin Kamat authored
Commit 1ef21f63 ("ARM: msm: move platform_data definitions") moved the file to the current location but forgot to remove the pointer to its previous location. Clean it up. While at it also change the header file protection macros appropriately. Signed-off-by:
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Sachin Kamat authored
Commit 0976f16d ("mmc: dw_mmc: add support tuning scheme") introduced the execute_tuning hook but did not add its description for kernel docs. Update the same. Signed-off-by:
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Sachin Kamat authored
The data structure of_match_ptr() protects is always compiled in. Hence of_match_ptr() is not needed. Signed-off-by:
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Sachin Kamat authored
The data structure of_match_ptr() protects is always compiled in. Hence of_match_ptr() is not needed. Signed-off-by:
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Sachin Kamat authored
The data structure of_match_ptr() protects is always compiled in. Hence of_match_ptr() is not needed. Signed-off-by:
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Sachin Kamat authored
pdata could be NULL if cd_gpio = -1. Dereference pdata only if it is not NULL. Signed-off-by:
Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by:
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Sachin Kamat authored
'of_id' is dereferenced before NULL pointer check. Move it to after the check. Signed-off-by:
Tony Prisk <linux@prisktech.co.nz> Signed-off-by:
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Sachin Kamat authored
sizeof should be of the parent structure type. Signed-off-by:
Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by:
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- 24 Feb, 2014 1 commit
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Tim Kryger authored
Enable the external clock needed by the host controller during the probe and disable it during the remove. Signed-off-by:
Tim Kryger <tim.kryger@linaro.org> Reviewed-by:
Markus Mayer <markus.mayer@linaro.org> Reviewed-by:
Matt Porter <matt.porter@linaro.org> Signed-off-by:
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- 23 Feb, 2014 10 commits
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Ulf Hansson authored
The ux500 variants have HW busy detection support, which is indicated by the busy_detect flag. For these variants let's enable the MMC_CAP_WAIT_WHILE_BUSY flag and add the support for it. The mmc core will provide the RSP_BUSY command flag for those requests we should care about busy detection. Regarding the max_busy_timeout, the HW don't support busy detection timeouts so at this initial step let's make it simple and set it to zero to indicate we are able to support any timeout. Cc: Russell King <linux@arm.linux.org.uk> Cc: Johan Rudholm <jrudholm@gmail.com> Signed-off-by:
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Ulf Hansson authored
In case of a read operation both MCI_CMDRESPEND and MCI_DATAEND can be set in the status register when entering the interrupt handler. This is due to that the card start sending data before the host has acknowledged the command response. To resolve the issue for this scenario, we must start by handling the CMD irq instead of the DATA irq. The reason is beacuse the completion of the DATA irq will not respect the current command and then causing it to be garbled. Cc: Russell King <linux@arm.linux.org.uk> Cc: Johan Rudholm <jrudholm@gmail.com> Signed-off-by:
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Ulf Hansson authored
When sending a stop command at the recovery path, use a R1B response when the failing data request are a WRITE. Thus we also care about the busy detection completion in this case. For a failing READ request, we use a R1 response for the stop command, since we don't need to care about busy detection in this case. To align behavior between hosts supporting MMC_CAP_WAIT_WHILE_BUSY and those who are not, we add a CMD13 polling method for the card's status. We also respect whether the host has specified the max_busy_timeout, which means we may fallback to CMD13 polling if the timeout is greater than what the host are able to support. Signed-off-by:
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Ulf Hansson authored
Currently for write request we don't trust the hw busy detection to be fully handled by host, thus we also poll the card's status until we see it's gets out of the busy state. Still there are scenarios where it will a benefit to trust the hw busy detection done by the host, since no additional polling is needed. Let's prepare card_busy_detect() to be able to handle this. Signed-off-by:
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Ulf Hansson authored
To complete a data write request we poll for the card's status register by sending CMD13. The are other scenarios when this polling method are needed, which is why we here moves this code to it's own function. No functional change. Signed-off-by:
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Ulf Hansson authored
While using open ended transmission and thus ending the transfer by sending a stop command, we shall use R1B only for writes and R1 shall be used for reads. Previously R1B were used in both cases. Signed-off-by:
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Ulf Hansson authored
When sending the sleep command for host drivers supporting MMC_CAP_WAIT_WHILE_BUSY, we need to confirm that max_busy_timeout is big enough comparing to the sleep timeout specified from card's EXT_CSD. If this isn't case, we use a R1 response instead of R1B and fallback to use a delay instead. Do note that a max_busy_timeout set to zero by the host, is interpreted as it can cope with whatever timeout the mmc core provides it with. Signed-off-by:
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Ulf Hansson authored
Conform to the eMMC spec and use the CMD6 generic timeout from the EXT_CSD register, when switching to HS200 mode. Signed-off-by:
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Ulf Hansson authored
If the host controller supports busy detection in HW, we expect the MMC_CAP_WAIT_WHILE_BUSY to be set. Likewise the corresponding host->max_busy_timeout should reflect the maximum busy detection timeout supported by the host. Previously we expected a host that supported MMC_CAP_WAIT_WHILE_BUSY to cope with any timeout, which just isn't feasible due to HW limitations. For most switch operations, R1B responses are expected and thus we need to check for busy detection completion. To cope with cases where the requested busy detection timeout is greater than what the host are able to support, we fallback to use a R1 response instead. This will prevent the host from doing HW busy detection. In those cases, busy detection completion is handled by polling the for the card's status using CMD13. This is the same mechanism used when the host doesn't support MMC_CAP_WAIT_WHILE_BUSY. Do note, a host->max_busy_timeout set to zero, is interpreted by the mmc core as it don't know what the host supports. It will then provide the host with whatever timeout the mmc core finds suitable. For some cases the mmc core has unfurtunate no clue of what timeout to use. In these cases we provide the host with a timeout value of zero, which the host may interpret as use whatever timeout it finds suitable. Signed-off-by:
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Ulf Hansson authored
Instead of using several references to card->host, let's use a local variable. That means we can remove the BUG_ON verifications for the same pointers. Signed-off-by:
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