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path: root/drivers/memory
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2013-03-25memory: emif: setup LP settings on freq updateAmbresh K
Program the power management shadow register on freq update Else the concept of threshold frequencies dont really matter as the system always uses the performance mode timing for LP which is programmed in at init time. Signed-off-by: Nishanth Menon <nm@ti.com> Signed-off-by: Ambresh K <ambresh@ti.com> Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com> Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-25memory: emif: Fix the lpmode timeout calculationLokesh Vutla
The driver tries to round up the specified timeout cycles to the next power of 2 value. This should be done defore updating timeout variable. Correcting this here. Reported-by: Nishanth Menon <nm@ti.com> Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com> Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-15drivers: memory: use module_platform_driver_probe()Fabio Porcedda
This patch converts the drivers to use the module_platform_driver_probe() macro which makes the code smaller and a bit simpler. Signed-off-by: Fabio Porcedda <fabio.porcedda@gmail.com> Cc: Benoit Cousson <b-cousson@ti.com> Cc: Aneesh V <aneesh@ti.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-15memory: tegra30: Fix build error w/o PMHiroshi Doyu
Make this depend on CONFIG_PM. Signed-off-by: Hiroshi Doyu <hdoyu@nvidia.com> Reviewed-by: Thierry Reding <thierry.reding@avionic-design.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-01-22memory: Convert to devm_ioremap_resource()Thierry Reding
Convert all uses of devm_request_and_ioremap() to the newly introduced devm_ioremap_resource() which provides more consistent error handling. devm_ioremap_resource() provides its own error messages so all explicit error messages can be removed from the failure code paths. Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-01-03Drivers: memory: remove __dev* attributes.Greg Kroah-Hartman
CONFIG_HOTPLUG is going away as an option. As a result, the __dev* markings need to be removed. This change removes the use of __devinit, __devexit_p, and __devinitconst, from these drivers. Based on patches originally written by Bill Pemberton, but redone by me in order to handle some of the coding style issues better, by hand. Cc: Bill Pemberton <wfp5p@virginia.edu> Cc: Hiroshi DOYU <hdoyu@nvidia.com> Cc: Stephen Warren <swarren@nvidia.com> Cc: Axel Lin <axel.lin@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-09-26memory: tegra{20,30}-mc: Fix reading incorrect register in mc_readl()Axel Lin
The code reading the register does not match the code writing to the register, fix it. Also fix the coding style in mc_writel() for better readability. Signed-off-by: Axel Lin <axel.lin@gmail.com> Acked-by: Stephen Warren <swarren@nvidia.com> Tested-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-09-26memory: emif: Add ifdef CONFIG_DEBUG_FS guard for emif_debugfs_[init|exit]Axel Lin
Add ifdef CONFIG_DEBUG_FS guard for emif_debugfs_[init|exit], and adds stub functions for the case CONFIG_DEBUG_FS is not set. When CONFIG_DEBUG_FS is enabled, debugfs_create_dir and debugfs_create_file return NULL on failure, fix it. Signed-off-by: Axel Lin <axel.lin@ingics.com> Acked-by : Santosh Shilimkar <santosh.shilimkar@ti.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-09-05memory: fix build when CONFIG_OF && !CONFIG_DDRStephen Warren
Commit e6b42eb "memory: emif: add device tree support to emif driver" added drivers/memory/of_memory.c, which references tables defined in lib/jedec_ddr_data.c. of_memory.c is compiled when CONFIG_OF, whereas jedec_ddr_data.c is compiled when CONFIG_DDR. This breaks the build when CONFIG_OF is defined but not CONFIG_DDR: drivers/built-in.o: In function `of_get_ddr_timings': drivers/memory/of_memory.c:138: undefined reference to `lpddr2_jedec_timings' drivers/built-in.o: In function `of_get_min_tck': drivers/memory/of_memory.c:62: undefined reference to `lpddr2_jedec_min_tck' make: *** [vmlinux] Error 1 To solve this, only compile of_memory.c when CONFIG_OF && CONFIG_DDR, otherwise, stub out the functions. Signed-off-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-09-04memory: emif: add device tree support to emif driverAneesh V
Device tree support for the EMIF driver. LPDDR2 generic timings extraction from device is managed using couple of helper functions which can be used by other memory controller drivers. Reviewed-by: Benoit Cousson <b-cousson@ti.com> Reviewed-by: Grant Likely <grant.likely@secretlab.ca> Tested-by: Lokesh Vutla <lokeshvutla@ti.com> Signed-off-by: Aneesh V <aneesh@ti.com> Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-05-14memory: tegra{20,30}-mc: Remove empty *_remove()Hiroshi DOYU
Remove unnecessary empty functions. Signed-off-by: Hiroshi DOYU <hdoyu@nvidia.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-05-14memory: tegra{20,30}-mc: Use dev_err_ratelimited()Hiroshi DOYU
Introduce a new dev_*_ratelimited() instead of pr_*_ratelimited() for better info to print. Signed-off-by: Hiroshi DOYU <hdoyu@nvidia.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-05-11ARM: tegra30: Make MC optional in KconfigHiroshi DOYU
For bare minimal system. Signed-off-by: Hiroshi DOYU <hdoyu@nvidia.com> Acked-by: Stephen Warren <swarren@wwwdotorg.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-05-11ARM: tegra20: Make MC optional in KconfigHiroshi DOYU
For bare minimal system. Signed-off-by: Hiroshi DOYU <hdoyu@nvidia.com> Acked-by: Stephen Warren <swarren@wwwdotorg.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-05-11ARM: tegra30: MC: Remove unnecessary BUG*()Hiroshi DOYU
Accessing interleaved MC register offsets/ranges are verified. BUG*()s in accessors can be removed. Signed-off-by: Hiroshi DOYU <hdoyu@nvidia.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-05-11ARM: tegra20: MC: Remove unnecessary BUG*()Hiroshi DOYU
Accessing interleaved MC register offsets/ranges are verified. BUG*()s in accessors can be removed. Signed-off-by: Hiroshi DOYU <hdoyu@nvidia.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-05-10ARM: tegra30: Add Tegra Memory Controller(MC) driverHiroshi DOYU
Tegra Memory Controller(MC) driver for Tegra30 Added to support MC General interrupts, mainly for IOMMU(SMMU). Signed-off-by: Hiroshi DOYU <hdoyu@nvidia.com> Acked-by: Stephen Warren <swarren@wwwdotorg.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-05-10ARM: tegra20: Add Tegra Memory Controller(MC) driverHiroshi DOYU
Tegra Memory Controller(MC) driver for Tegra20 Added to support MC General interrupts, mainly for IOMMU(GART). Signed-off-by: Hiroshi DOYU <hdoyu@nvidia.com> Acked-by: Stephen Warren <swarren@wwwdotorg.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-05-04memory: emif: Add Kconfig dependency for TI EMIF controllerSantosh Shilimkar
Make TI_EMIF depends on ARCH_OMAP2PLUS to avoid build breaks on other architectures. In future if other TI non OMAP socs start using it, the dependency can be extended. Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Reported-by: Paul Gortmaker <paul.gortmaker@windriver.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-05-02memory: emif: add debugfs entries for emifAneesh V
Add debug entries for: 1. calculated registers per frequency 2. last polled value of MR4(temperature level of LPDDR2 memory) Signed-off-by: Aneesh V <aneesh@ti.com> Reviewed-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Reviewed-by: Benoit Cousson <b-cousson@ti.com> [santosh.shilimkar@ti.com: Moved to drivers/memory from drivers/misc] Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Tested-by: Lokesh Vutla <lokeshvutla@ti.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-05-02memory: emif: add one-time settingsAneesh V
Add settings that are not dependent on frequency or any other transient parameters. This includes - power managment control init - impedence calibration control - frequency independent phy configuration registers - initialization of temperature polling Signed-off-by: Aneesh V <aneesh@ti.com> Reviewed-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Reviewed-by: Benoit Cousson <b-cousson@ti.com> [santosh.shilimkar@ti.com: Moved to drivers/memory from drivers/misc] Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Tested-by: Lokesh Vutla <lokeshvutla@ti.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-05-02memory: emif: add interrupt and temperature handlingAneesh V
Add an ISR for EMIF that: 1. reports details of access errors 2. takes action on thermal events Also clear all interrupts on shut-down. Pending IRQs may casue problems during warm-reset. Temperature handling: EMIF can be configured to poll the temperature level of an LPDDR2 device from the MR4 mode register in the device. EMIF generates an interrupt whenever it identifies a temperature level change between two consecutive pollings. Some of the timing parameters need to be de-rated at high temperatures. The interrupt handler takes care of doing this and also takes care of going back to nominal settings when temperature falls back to nominal levels. Signed-off-by: Aneesh V <aneesh@ti.com> Reviewed-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Reviewed-by: Benoit Cousson <b-cousson@ti.com> [santosh.shilimkar@ti.com: Moved to drivers/memory from drivers/misc] Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-05-02memory: emif: handle frequency and voltage change eventsAneesh V
Change SDRAM timings and other settings as necessary on voltage and frequency changes. We calculate these register settings based on data from the device data sheet and inputs such a frequency, voltage state(stable or ramping), temperature level etc. TODO: frequency and voltage change handling needs to be integrated with clock framework and regulator framework respectively. This is not done today due to missing pieces in the kernel. Signed-off-by: Aneesh V <aneesh@ti.com> Reviewed-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Reviewed-by: Benoit Cousson <b-cousson@ti.com> [santosh.shilimkar@ti.com: Moved to drivers/memory from drivers/misc] Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Tested-by: Lokesh Vutla <lokeshvutla@ti.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-05-02memory: emif: add basic infrastructure for EMIF driverAneesh V
EMIF is an SDRAM controller used in various Texas Instruments SoCs. EMIF supports, based on its revision, one or more of LPDDR2/DDR2/DDR3 protocols. Add the basic infrastructure for EMIF driver that includes driver registration, probe, parsing of platform data etc. Signed-off-by: Aneesh V <aneesh@ti.com> Reviewed-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Reviewed-by: Benoit Cousson <b-cousson@ti.com> [santosh.shilimkar@ti.com: Moved to drivers/memory from drivers/misc] Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Tested-by: Lokesh Vutla <lokeshvutla@ti.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-05-02memory: emif: add register definitions for EMIFAneesh V
Add register offsets and bit field definitions for EMIF module in TI SoCs Signed-off-by: Aneesh V <aneesh@ti.com> Reviewed-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Reviewed-by: Benoit Cousson <b-cousson@ti.com> [santosh.shilimkar@ti.com: Moved to drivers/memory from drivers/misc] Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Tested-by: Lokesh Vutla <lokeshvutla@ti.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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