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| author | Martin Blumenstingl <martin.blumenstingl@googlemail.com> | 2017-09-17 18:45:19 +0200 |
|---|---|---|
| committer | Kevin Hilman <khilman@baylibre.com> | 2017-10-29 16:29:21 +0100 |
| commit | 0606326effc66201223de26d71c2779a108ee452 (patch) | |
| tree | 758c4d35d76033364b7bf688ef36a79e04e7f0f3 /arch/arm/include/asm/smp_scu.h | |
| parent | dt-bindings: Amlogic: Add Meson8 and Meson8b SMP related documentation (diff) | |
| download | linux-0606326effc66201223de26d71c2779a108ee452.tar.xz linux-0606326effc66201223de26d71c2779a108ee452.zip | |
ARM: smp_scu: add a helper for powering on a specific CPU
To boot the secondary CPUs on the Amlogic Meson8/Meson8m2 (Cortex-A9)
and Meson8b (Cortex-A5) SoCs we have to enable SCU mode SCU_PM_NORMAL,
otherwise the secondary cores will not start.
This patch adds a scu_cpu_power_enable() function which can be used to
enable SCU_PM_NORMAL for a specific (logical) CPU. An internal helper
function is also created, to avoid code duplication with
scu_power_mode().
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Acked-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: Kevin Hilman <khilman@baylibre.com>
Diffstat (limited to 'arch/arm/include/asm/smp_scu.h')
| -rw-r--r-- | arch/arm/include/asm/smp_scu.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/arm/include/asm/smp_scu.h b/arch/arm/include/asm/smp_scu.h index 5983f6bc62d5..4c47bdfd4f61 100644 --- a/arch/arm/include/asm/smp_scu.h +++ b/arch/arm/include/asm/smp_scu.h @@ -27,6 +27,7 @@ static inline unsigned long scu_a9_get_base(void) #ifdef CONFIG_HAVE_ARM_SCU unsigned int scu_get_core_count(void __iomem *); int scu_power_mode(void __iomem *, unsigned int); +int scu_cpu_power_enable(void __iomem *, unsigned int); #else static inline unsigned int scu_get_core_count(void __iomem *scu_base) { @@ -36,6 +37,11 @@ static inline int scu_power_mode(void __iomem *scu_base, unsigned int mode) { return -EINVAL; } +static inline int scu_cpu_power_enable(void __iomem *scu_base, + unsigned int mode) +{ + return -EINVAL; +} #endif #if defined(CONFIG_SMP) && defined(CONFIG_HAVE_ARM_SCU) |