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* metag: Remove arch/metag/James Hogan2018-02-221-59/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The earliest Meta architecture port of Linux I have a record of was an import of a Meta port of Linux v2.4.1 in February 2004, which was worked on significantly over the next few years by Graham Whaley, Will Newton, Matt Fleming, myself and others. Eventually the port was merged into mainline in v3.9 in March 2013, not long after Imagination Technologies bought MIPS Technologies and shifted its CPU focus over to the MIPS architecture. As a result, though the port was maintained for a while, kept on life support for a while longer, and useful for testing a few specific drivers for which I don't have ready access to the equivalent MIPS hardware, it is now essentially dead with no users. It is also stuck using an out-of-tree toolchain based on GCC 4.2.4 which is no longer maintained, now struggles to build modern kernels due to toolchain bugs, and doesn't itself build with a modern GCC. The latest buildroot port is still using an old uClibc snapshot which is no longer served, and the latest uClibc doesn't build with GCC 4.2.4. So lets call it a day and drop the Meta architecture port from the kernel. RIP Meta. Signed-off-by: James Hogan <jhogan@kernel.org> Link: https://lkml.kernel.org/r/95906b76-6ce1-3f84-eaba-c29b4ae952eb@roeck-us.net Reviewed-by: Guenter Roeck <linux@roeck-us.net> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Acked-by: Graham Whaley <graham.whaley@gmail.com> Cc: linux-metag@vger.kernel.org
* metag: init common clk and use "core" clkJames Hogan2013-06-131-0/+8
| | | | | | | | | | | | | | | | If the common clock framework is enabled, call of_clk_init(NULL) in time_init() to register device tree clocks with the clock framework. After this time_init() calls a new function init_metag_clocks(), which looks for a clock named "core" in the node compatible with "img,meta" (usually the root node). If found the get_core_freq machine callback is overridden to obtain the core clock frequency using that clock. Signed-off-by: James Hogan <james.hogan@imgtec.com> Cc: Mike Turquette <mturquette@linaro.org> Cc: Grant Likely <grant.likely@linaro.org> Cc: Rob Herring <rob.herring@calxeda.com> Cc: devicetree-discuss@lists.ozlabs.org
* metag: Time keepingJames Hogan2013-03-021-0/+51
Add time keeping code for metag. Meta hardware threads have 2 timers. The background timer (TXTIMER) is used as a free-running time base, and the interrupt timer (TXTIMERI) is used for the timer interrupt. Both counters traditionally count at approximately 1MHz. Signed-off-by: James Hogan <james.hogan@imgtec.com> Cc: John Stultz <johnstul@us.ibm.com> Cc: Thomas Gleixner <tglx@linutronix.de>
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