mirror of
https://github.com/edk2-porting/linux-next.git
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8e73e367f7
This branch contains code cleanups, moves and removals for 3.12.
There's a large number of various cleanups, and a nice net removal of
13500 lines of code.
Highlights worth mentioning are:
- A series of patches from Stephen Boyd removing the ARM local timer API.
- Move of Qualcomm MSM IOMMU code to drivers/iommu.
- Samsung PWM driver cleanups from Tomasz Figa, removing legacy PWM driver
and switching over to the drivers/pwm one.
- Removal of some unusued auto-generated headers for OMAP2+ (PRM/CM).
There's also a move of a header file out of include/linux/i2c/ to
platform_data, where it really belongs. It touches mostly ARM platform
code for include changes so we took it through our tree.
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Merge tag 'cleanup-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC cleanups from Olof Johansson:
"This branch contains code cleanups, moves and removals for 3.12.
There's a large number of various cleanups, and a nice net removal of
13500 lines of code.
Highlights worth mentioning are:
- A series of patches from Stephen Boyd removing the ARM local timer
API.
- Move of Qualcomm MSM IOMMU code to drivers/iommu.
- Samsung PWM driver cleanups from Tomasz Figa, removing legacy PWM
driver and switching over to the drivers/pwm one.
- Removal of some unusued auto-generated headers for OMAP2+ (PRM/CM).
There's also a move of a header file out of include/linux/i2c/ to
platform_data, where it really belongs. It touches mostly ARM
platform code for include changes so we took it through our tree"
* tag 'cleanup-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (83 commits)
ARM: OMAP2+: Add back the define for AM33XX_RST_GLOBAL_WARM_SW_MASK
gpio: (gpio-pca953x) move header to linux/platform_data/
arm: zynq: hotplug: Remove unreachable code
ARM: SAMSUNG: Remove unnecessary exynos4_default_sdhci*()
tegra: simplify use of devm_ioremap_resource
ARM: SAMSUNG: Remove plat/regs-timer.h header
ARM: SAMSUNG: Remove remaining uses of plat/regs-timer.h header
ARM: SAMSUNG: Remove pwm-clock infrastructure
ARM: SAMSUNG: Remove old PWM timer platform devices
pwm: Remove superseded pwm-samsung-legacy driver
ARM: SAMSUNG: Modify board files to use new PWM platform device
ARM: SAMSUNG: Rework private data handling in dev-backlight
pwm: Add new pwm-samsung driver
ARM: mach-mvebu: remove redundant DT parsing and validation
ARM: msm: Only compile io.c on platforms that use it
iommu/msm: Move mach includes to iommu directory
ARM: msm: Remove devices-iommu.c
ARM: msm: Move mach/board.h contents to common.h
ARM: msm: Migrate msm_timer to CLOCKSOURCE_OF_DECLARE
ARM: msm: Remove TMR and TMR0 static mappings
...
110 lines
2.7 KiB
C
110 lines
2.7 KiB
C
/*
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* Symmetric Multi Processing (SMP) support for Armada XP
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*
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* Copyright (C) 2012 Marvell
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*
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* Lior Amsalem <alior@marvell.com>
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* Yehuda Yitschak <yehuday@marvell.com>
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* Gregory CLEMENT <gregory.clement@free-electrons.com>
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* Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
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*
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* This file is licensed under the terms of the GNU General Public
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* License version 2. This program is licensed "as is" without any
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* warranty of any kind, whether express or implied.
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*
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* The Armada XP SoC has 4 ARMv7 PJ4B CPUs running in full HW coherency
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* This file implements the routines for preparing the SMP infrastructure
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* and waking up the secondary CPUs
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*/
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#include <linux/init.h>
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#include <linux/smp.h>
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#include <linux/clk.h>
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#include <linux/of.h>
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#include <linux/mbus.h>
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#include <asm/cacheflush.h>
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#include <asm/smp_plat.h>
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#include "common.h"
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#include "armada-370-xp.h"
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#include "pmsu.h"
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#include "coherency.h"
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static struct clk *__init get_cpu_clk(int cpu)
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{
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struct clk *cpu_clk;
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struct device_node *np = of_get_cpu_node(cpu, NULL);
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if (WARN(!np, "missing cpu node\n"))
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return NULL;
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cpu_clk = of_clk_get(np, 0);
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if (WARN_ON(IS_ERR(cpu_clk)))
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return NULL;
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return cpu_clk;
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}
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void __init set_secondary_cpus_clock(void)
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{
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int thiscpu, cpu;
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unsigned long rate;
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struct clk *cpu_clk;
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thiscpu = smp_processor_id();
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cpu_clk = get_cpu_clk(thiscpu);
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if (!cpu_clk)
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return;
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clk_prepare_enable(cpu_clk);
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rate = clk_get_rate(cpu_clk);
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/* set all the other CPU clk to the same rate than the boot CPU */
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for_each_possible_cpu(cpu) {
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if (cpu == thiscpu)
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continue;
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cpu_clk = get_cpu_clk(cpu);
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if (!cpu_clk)
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return;
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clk_set_rate(cpu_clk, rate);
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}
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}
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static void armada_xp_secondary_init(unsigned int cpu)
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{
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armada_xp_mpic_smp_cpu_init();
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}
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static int armada_xp_boot_secondary(unsigned int cpu, struct task_struct *idle)
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{
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pr_info("Booting CPU %d\n", cpu);
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armada_xp_boot_cpu(cpu, armada_xp_secondary_startup);
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return 0;
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}
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static void __init armada_xp_smp_init_cpus(void)
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{
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unsigned int ncores = num_possible_cpus();
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if (ncores == 0 || ncores > ARMADA_XP_MAX_CPUS)
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panic("Invalid number of CPUs in DT\n");
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set_smp_cross_call(armada_mpic_send_doorbell);
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}
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void __init armada_xp_smp_prepare_cpus(unsigned int max_cpus)
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{
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set_secondary_cpus_clock();
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flush_cache_all();
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set_cpu_coherent(cpu_logical_map(smp_processor_id()), 0);
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mvebu_mbus_add_window("bootrom", 0xfff00000, SZ_1M);
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}
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struct smp_operations armada_xp_smp_ops __initdata = {
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.smp_init_cpus = armada_xp_smp_init_cpus,
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.smp_prepare_cpus = armada_xp_smp_prepare_cpus,
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.smp_secondary_init = armada_xp_secondary_init,
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.smp_boot_secondary = armada_xp_boot_secondary,
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#ifdef CONFIG_HOTPLUG_CPU
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.cpu_die = armada_xp_cpu_die,
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#endif
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};
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