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* memory: Convert to devm_ioremap_resource()Thierry Reding2013-01-223-11/+11
| | | | | | | | | | | 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>
* Drivers: memory: remove __dev* attributes.Greg Kroah-Hartman2013-01-042-4/+4
| | | | | | | | | | | | | | | | | 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>
* memory: tegra{20,30}-mc: Fix reading incorrect register in mc_readl()Axel Lin2012-09-262-22/+10
| | | | | | | | | | | | 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>
* memory: emif: Add ifdef CONFIG_DEBUG_FS guard for emif_debugfs_[init|exit]Axel Lin2012-09-261-6/+17
| | | | | | | | | | | | 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>
* memory: fix build when CONFIG_OF && !CONFIG_DDRStephen Warren2012-09-052-2/+4
| | | | | | | | | | | | | | | | | | | | 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>
* memory: emif: add device tree support to emif driverAneesh V2012-09-054-1/+371
| | | | | | | | | | | | | | | 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>
* memory: tegra{20,30}-mc: Remove empty *_remove()Hiroshi DOYU2012-05-142-12/+0
| | | | | | | Remove unnecessary empty functions. Signed-off-by: Hiroshi DOYU <hdoyu@nvidia.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* memory: tegra{20,30}-mc: Use dev_err_ratelimited()Hiroshi DOYU2012-05-142-4/+6
| | | | | | | | 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>
* ARM: tegra30: Make MC optional in KconfigHiroshi DOYU2012-05-121-1/+7
| | | | | | | | 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>
* ARM: tegra20: Make MC optional in KconfigHiroshi DOYU2012-05-121-1/+7
| | | | | | | | 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>
* ARM: tegra30: MC: Remove unnecessary BUG*()Hiroshi DOYU2012-05-121-12/+8
| | | | | | | | 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>
* ARM: tegra20: MC: Remove unnecessary BUG*()Hiroshi DOYU2012-05-121-6/+6
| | | | | | | | 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>
* ARM: tegra30: Add Tegra Memory Controller(MC) driverHiroshi DOYU2012-05-103-0/+396
| | | | | | | | | 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>
* ARM: tegra20: Add Tegra Memory Controller(MC) driverHiroshi DOYU2012-05-103-0/+267
| | | | | | | | | 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>
* memory: emif: Add Kconfig dependency for TI EMIF controllerSantosh Shilimkar2012-05-051-0/+1
| | | | | | | | | | | 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>
* memory: emif: add debugfs entries for emifAneesh V2012-05-021-0/+138
| | | | | | | | | | | | | | | 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>
* memory: emif: add one-time settingsAneesh V2012-05-021-0/+148
| | | | | | | | | | | | | | | | | 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>
* memory: emif: add interrupt and temperature handlingAneesh V2012-05-021-2/+209
| | | | | | | | | | | | | | | | | | | | | | | | | | | 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>
* memory: emif: handle frequency and voltage change eventsAneesh V2012-05-022-4/+1020
| | | | | | | | | | | | | | | | | | | | | 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>
* memory: emif: add basic infrastructure for EMIF driverAneesh V2012-05-024-0/+323
| | | | | | | | | | | | | | | | | 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>
* memory: emif: add register definitions for EMIFAneesh V2012-05-021-0/+454
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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