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author | Linus Torvalds <torvalds@linux-foundation.org> | 2014-04-05 21:19:54 (GMT) |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-04-05 21:19:54 (GMT) |
commit | ff050ad12c551233e546506409c89eb2f640d9f3 (patch) | |
tree | 8ae29fece122a91cbd6160fb2ca34c0ea82c3df9 /arch/arm/kernel | |
parent | dfc25e4503aef6b82a1de4a0fbe19aafa8648fbe (diff) | |
parent | 9233087dc468f75bdeb7830c694c09dc74be88c4 (diff) | |
download | linux-ff050ad12c551233e546506409c89eb2f640d9f3.tar.xz |
Merge tag 'soc-3.15' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC specific changes from Arnd Bergmann:
"Lots of changes specific to one of the SoC families. Some that stick
out are:
- mach-qcom gains new features, most importantly SMP support for the
newer chips (Stephen Boyd, Rohit Vaswani)
- mvebu gains support for three new SoCs: Armada 375, 380 and 385
(Thomas Petazzoni and Free-electrons team)
- SMP support for Rockchips (Heiko Stübner)
- Lots of i.MX changes (Shawn Guo)
- Added support for BCM5301x SoC (Hauke Mehrtens)
- Multiplatform support for Marvell Kirkwood and Dove (Andrew Lunn
and Sebastian Hesselbarth doing the final part of a long journey)
- Unify davinci platforms and remove obsolete ones (Sekhar Nori, Arnd
Bergmann)"
* tag 'soc-3.15' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (126 commits)
ARM: sunxi: Select HAVE_ARM_ARCH_TIMER
ARM: cache-tauros2: remove ARMv6 code
ARM: mvebu: don't select CONFIG_NEON
ARM: davinci: fix DT booting with default defconfig
ARM: configs: bcm_defconfig: enable bcm590xx regulator support
ARM: davinci: remove tnetv107x support
MAINTAINERS: Update ARM STi maintainers
ARM: restrict BCM_KONA_UART to ARCH_BCM_MOBILE
ARM: bcm21664: Add board support.
ARM: sunxi: Add the new watchog compatibles to the reboot code
ARM: enable ARM_HAS_SG_CHAIN for multiplatform
ARM: davinci: remove da8xx_omapl_defconfig
ARM: davinci: da8xx: fix multiple watchdog device registration
ARM: davinci: add da8xx specific configs to davinci_all_defconfig
ARM: davinci: enable da8xx build concurrently with older devices
ARM: BCM5301X: workaround suppress fault
ARM: BCM5301X: add early debugging support
ARM: BCM5301X: initial support for the BCM5301X/BCM470X SoCs with ARM CPU
ARM: mach-bcm: Remove GENERIC_TIME
ARM: shmobile: APMU: Fix warnings due to improper printk formats
...
Diffstat (limited to 'arch/arm/kernel')
-rw-r--r-- | arch/arm/kernel/devtree.c | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/arch/arm/kernel/devtree.c b/arch/arm/kernel/devtree.c index f751714..c7419a5 100644 --- a/arch/arm/kernel/devtree.c +++ b/arch/arm/kernel/devtree.c @@ -18,6 +18,7 @@ #include <linux/of_fdt.h> #include <linux/of_irq.h> #include <linux/of_platform.h> +#include <linux/smp.h> #include <asm/cputype.h> #include <asm/setup.h> @@ -63,6 +64,34 @@ void __init arm_dt_memblock_reserve(void) } } +#ifdef CONFIG_SMP +extern struct of_cpu_method __cpu_method_of_table_begin[]; +extern struct of_cpu_method __cpu_method_of_table_end[]; + +static int __init set_smp_ops_by_method(struct device_node *node) +{ + const char *method; + struct of_cpu_method *m = __cpu_method_of_table_begin; + + if (of_property_read_string(node, "enable-method", &method)) + return 0; + + for (; m < __cpu_method_of_table_end; m++) + if (!strcmp(m->method, method)) { + smp_set_ops(m->ops); + return 1; + } + + return 0; +} +#else +static inline int set_smp_ops_by_method(struct device_node *node) +{ + return 1; +} +#endif + + /* * arm_dt_init_cpu_maps - Function retrieves cpu nodes from the device tree * and builds the cpu logical map array containing MPIDR values related to @@ -79,6 +108,7 @@ void __init arm_dt_init_cpu_maps(void) * read as 0. */ struct device_node *cpu, *cpus; + int found_method = 0; u32 i, j, cpuidx = 1; u32 mpidr = is_smp() ? read_cpuid_mpidr() & MPIDR_HWID_BITMASK : 0; @@ -150,8 +180,18 @@ void __init arm_dt_init_cpu_maps(void) } tmp_map[i] = hwid; + + if (!found_method) + found_method = set_smp_ops_by_method(cpu); } + /* + * Fallback to an enable-method in the cpus node if nothing found in + * a cpu node. + */ + if (!found_method) + set_smp_ops_by_method(cpus); + if (!bootcpu_valid) { pr_warn("DT missing boot CPU MPIDR[23:0], fall back to default cpu_logical_map\n"); return; |