diff options
author | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2019-07-20 07:07:56 +0300 |
---|---|---|
committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2019-07-20 07:07:56 +0300 |
commit | c39f2d9db0fd81ea20bb5cce9b3f082ca63753e2 (patch) | |
tree | 8e80ed5601b4fb8880a2ca8e08802bc8b1f850bd /arch/arm/mach-exynos/mcpm-exynos.c | |
parent | Merge branch 'next' into for-linus (diff) | |
parent | Input: alps - fix a mismatch between a condition check and its comment (diff) | |
download | linux-dev-c39f2d9db0fd81ea20bb5cce9b3f082ca63753e2.tar.xz linux-dev-c39f2d9db0fd81ea20bb5cce9b3f082ca63753e2.zip |
Merge branch 'next' into for-linus
Prepare second round of input updates for 5.3 merge window.
Diffstat (limited to 'arch/arm/mach-exynos/mcpm-exynos.c')
-rw-r--r-- | arch/arm/mach-exynos/mcpm-exynos.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/arch/arm/mach-exynos/mcpm-exynos.c b/arch/arm/mach-exynos/mcpm-exynos.c index 72bc035bedbe..9a681b421ae1 100644 --- a/arch/arm/mach-exynos/mcpm-exynos.c +++ b/arch/arm/mach-exynos/mcpm-exynos.c @@ -75,14 +75,25 @@ static int exynos_cpu_powerup(unsigned int cpu, unsigned int cluster) */ if (cluster && cluster == MPIDR_AFFINITY_LEVEL(cpu_logical_map(0), 1)) { + unsigned int timeout = 16; + /* * Before we reset the Little cores, we should wait * the SPARE2 register is set to 1 because the init * codes of the iROM will set the register after * initialization. */ - while (!pmu_raw_readl(S5P_PMU_SPARE2)) + while (timeout && !pmu_raw_readl(S5P_PMU_SPARE2)) { + timeout--; udelay(10); + } + + if (timeout == 0) { + pr_err("cpu %u cluster %u powerup failed\n", + cpu, cluster); + exynos_cpu_power_down(cpunr); + return -ETIMEDOUT; + } pmu_raw_writel(EXYNOS5420_KFC_CORE_RESET(cpu), EXYNOS_SWRESET); |