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2014-07-17ARM: tegra: Convert PMC to a driverThierry Reding2-4/+65
This commit converts the PMC support code to a platform driver. Because the boot process needs to call into this driver very early, also set up a minimal environment via an early initcall. Signed-off-by: Thierry Reding <treding@nvidia.com>
2014-07-17soc/tegra: fuse: Set up in early initcallThierry Reding1-1/+0
Rather than rely on explicit initialization order called from SoC setup code, use a plain initcall and rely on initcall ordering to take care of dependencies. This driver exposes some functionality (querying the chip ID) needed at very early stages of the boot process. An early initcall is good enough provided that some of the dependencies are deferred to later stages. To make sure any abuses are easily caught, output a warning message if the chip ID is queried while it can't be read yet. Signed-off-by: Thierry Reding <treding@nvidia.com>
2014-07-17soc/tegra: Implement runtime check for Tegra SoCsThierry Reding1-0/+14
Subsequent patches will move some of the initialization code from SoC setup code to regular initcalls. To prevent breakage on other SoCs in multi-platform builds, these initcalls need to check that they indeed run on Tegra. Signed-off-by: Thierry Reding <treding@nvidia.com>
2014-07-17soc/tegra: fuse: move APB DMA into Tegra20 fuse driverPeter De Schrijver1-14/+0
The Tegra20 fuse driver is the only user of tegra_apb_readl_using_dma(). Therefore we can simply the code by incorporating the APB DMA handling into the driver directly. tegra_apb_writel_using_dma() is dropped because there are no users. Signed-off-by: Peter De Schrijver <pdeschrijver@nvidia.com> Signed-off-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Thierry Reding <treding@nvidia.com>
2014-07-17soc/tegra: Add efuse driver for TegraPeter De Schrijver1-1/+19
Implement fuse driver for Tegra20, Tegra30, Tegra114 and Tegra124. This replaces functionality previously provided in arch/arm/mach-tegra, which is removed in this patch. While at it, move the only user of the global tegra_revision variable over to tegra_sku_info.revision and export tegra_fuse_readl() to allow drivers to read calibration fuses. Signed-off-by: Peter De Schrijver <pdeschrijver@nvidia.com> Signed-off-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Thierry Reding <treding@nvidia.com>
2014-07-17ARM: tegra: move fuse exports to soc/tegra/fuse.hPeter De Schrijver1-0/+16
All fuse related functionality will move to a driver in the following patches. To prepare for this, export all the required functionality in a global header file and move all users of fuse.h to soc/tegra/fuse.h. While we're at it, remove tegra_bct_strapping, as its only user was removed in Commit a7cbe92cef27 ("ARM: tegra: remove tegra EMC scaling driver"). Signed-off-by: Peter De Schrijver <pdeschrijver@nvidia.com> Signed-off-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Thierry Reding <treding@nvidia.com>
2014-07-17ARM: tegra: export apb dma readl/writelPeter De Schrijver1-0/+14
Export APB DMA readl and writel. These are needed because we can't access the fuses directly on Tegra20 without potentially causing a system hang. Also have the APB DMA readl and writel return an error in case of a read failure instead of just returning zero or ignore write failures. Signed-off-by: Peter De Schrijver <pdeschrijver@nvidia.com> Signed-off-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Thierry Reding <treding@nvidia.com>
2014-07-17ARM: tegra: Use a function to get the chip IDThierry Reding1-0/+10
Instead of using a simple variable access to get at the Tegra chip ID, use a function so that we can run additional code. This can be used to determine where the chip ID is being accessed without being available. That in turn will be handy for resolving boot sequence dependencies in order to convert more code to regular initcalls rather than a sequence fixed by Tegra SoC setup code. Signed-off-by: Thierry Reding <treding@nvidia.com>
2014-07-17ARM: tegra: Move includes to include/soc/tegraThierry Reding4-0/+200
In order to not clutter the include/linux directory with SoC specific headers, move the Tegra-specific headers out into a separate directory. Signed-off-by: Thierry Reding <treding@nvidia.com>