Messages in this thread Patch in this message | | | From | Mylène Josserand <> | Subject | [PATCH v4 04/10] ARM: sun8i: smp: Add hotplug support for sun8i-a83t | Date | Fri, 23 Feb 2018 14:37:36 +0100 |
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Add hotplug support for sun8i-a83t.
Hotplug CPU for CPU0 is currently not working. Remove the possibility to disable CPU0 only for sun8i-a83t.
Signed-off-by: Mylène Josserand <mylene.josserand@bootlin.com> --- arch/arm/mach-sunxi/mc_smp.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/arch/arm/mach-sunxi/mc_smp.c b/arch/arm/mach-sunxi/mc_smp.c index 3bd9066a1422..f2c2cfca28cd 100644 --- a/arch/arm/mach-sunxi/mc_smp.c +++ b/arch/arm/mach-sunxi/mc_smp.c @@ -579,6 +579,8 @@ static int sunxi_cluster_powerdown(unsigned int cluster) reg = readl(prcm_base + PRCM_PWROFF_GATING_REG(cluster)); if (is_sun9i) reg |= PRCM_PWROFF_GATING_REG_CLUSTER_SUN9I; + else + reg |= PRCM_PWROFF_GATING_REG_CLUSTER_SUN8I; writel(reg, prcm_base + PRCM_PWROFF_GATING_REG(cluster)); udelay(20); @@ -660,8 +662,12 @@ static int sunxi_mc_smp_cpu_kill(unsigned int l_cpu) return !ret; } -static bool sunxi_mc_smp_cpu_can_disable(unsigned int __unused) +static bool sunxi_mc_smp_cpu_can_disable(unsigned int cpu) { + /* CPU0 hotplug handled only for sun9i */ + if (!is_sun9i) + if (cpu == 0) + return false; return true; } #endif -- 2.11.0
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