diff options
Diffstat (limited to 'arch/arm/mach-imx/platsmp.c')
| -rw-r--r-- | arch/arm/mach-imx/platsmp.c | 35 |
1 files changed, 28 insertions, 7 deletions
diff --git a/arch/arm/mach-imx/platsmp.c b/arch/arm/mach-imx/platsmp.c index c2d1b329fba1..972639038be5 100644 --- a/arch/arm/mach-imx/platsmp.c +++ b/arch/arm/mach-imx/platsmp.c @@ -1,13 +1,7 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * Copyright 2011 Freescale Semiconductor, Inc. * Copyright 2011 Linaro Ltd. - * - * The code contained herein is licensed under the GNU General Public - * License. You may obtain a copy of the GNU General Public License - * Version 2 or later at the following locations: - * - * http://www.opensource.org/licenses/gpl-license.html - * http://www.gnu.org/copyleft/gpl.html */ #include <linux/init.h> @@ -98,6 +92,32 @@ const struct smp_operations imx_smp_ops __initconst = { #endif }; +/* + * Initialise the CPU possible map early - this describes the CPUs + * which may be present or become present in the system. + */ +static void __init imx7_smp_init_cpus(void) +{ + struct device_node *np; + int i, ncores = 0; + + /* The iMX7D SCU does not report core count, get it from DT */ + for_each_of_cpu_node(np) + ncores++; + + for (i = ncores; i < NR_CPUS; i++) + set_cpu_possible(i, false); +} + +const struct smp_operations imx7_smp_ops __initconst = { + .smp_init_cpus = imx7_smp_init_cpus, + .smp_boot_secondary = imx_boot_secondary, +#ifdef CONFIG_HOTPLUG_CPU + .cpu_die = imx_cpu_die, + .cpu_kill = imx_cpu_kill, +#endif +}; + #define DCFG_CCSR_SCRATCHRW1 0x200 static int ls1021a_boot_secondary(unsigned int cpu, struct task_struct *idle) @@ -115,6 +135,7 @@ static void __init ls1021a_smp_prepare_cpus(unsigned int max_cpus) np = of_find_compatible_node(NULL, NULL, "fsl,ls1021a-dcfg"); dcfg_base = of_iomap(np, 0); + of_node_put(np); BUG_ON(!dcfg_base); paddr = __pa_symbol(secondary_startup); |