linux-dev - Linux kernel development work

Age	Commit message (Collapse)	Author	Files	Lines
2015-06-15	cpufreq: qoriq: optimize the CPU frequency switching time	Tang Yuantian	1	-11/+21
	Each time the CPU switches its frequency, the clock nodes in DTS are walked through to find proper clock source. This is very time-consuming, for example, it is up to 500+ us on T4240. Besides, switching time varies from clock to clock. To optimize this, each input clock of CPU is buffered, so that it can be picked up instantly when needed. Since for each CPU each input clock is stored in a pointer which takes 4 or 8 bytes memory and normally there are several input clocks per CPU, that will not take much memory as well. Signed-off-by: Tang Yuantian <Yuantian.Tang@freescale.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2015-04-11	cpufreq: fix qoriq uniprocessor build	Arnd Bergmann	1	-0/+2
	The qoriq-cpufreq driver contains a hack for powerpc to include asm/smp.h on uniprocessor builds so it can get the hardware CPU number. On ARM, it does not require this hack, but instead gets a compile error: In file included from drivers/cpufreq/qoriq-cpufreq.c:24:0: arch/arm/include/asm/smp.h:18:3: error: #error "<asm/smp.h> included in non-SMP build" arch/arm/include/asm/smp.h:21:0: warning: "raw_smp_processor_id" redefined This adds an #ifdef to mirror the one in its get_cpu_physical_id() function. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Fixes: 2f249358eedaf ("cpufreq: qoriq: rename the driver") Cc: Tang Yuantian <Yuantian.Tang@freescale.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2015-03-18	cpufreq: qoriq: rename the driver	Tang Yuantian	1	-0/+372
	This driver works on all QorIQ platforms which include ARM-based cores and PPC-based cores. Rename it in order to represent better. Signed-off-by: Tang Yuantian <Yuantian.Tang@freescale.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>