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| author | Stefan Agner <stefan.agner@toradex.com> | 2018-06-24 21:09:57 +0200 |
|---|---|---|
| committer | Stefano Babic <sbabic@denx.de> | 2018-07-23 10:54:23 +0200 |
| commit | 28a5af11f876a4fa6f1913281985e53b5ed4ba23 (patch) | |
| tree | 0e566ad98f860e1a74bb084d7cd37638f04ab343 | |
| parent | a89eb89b385908df511190cef7e360cb4c3f12f6 (diff) | |
| download | u-boot-28a5af11f876a4fa6f1913281985e53b5ed4ba23.zip u-boot-28a5af11f876a4fa6f1913281985e53b5ed4ba23.tar.gz u-boot-28a5af11f876a4fa6f1913281985e53b5ed4ba23.tar.bz2 | |
imx: mx7: psci: support CPU0 on/off
So far psci_cpu_(on|off) only worked for CPU1. Allow to control
CPU0 too. This allows to run the Linux PSCI checker successfully:
[ 2.213447] psci_checker: PSCI checker started using 2 CPUs
[ 2.219107] psci_checker: Starting hotplug tests
[ 2.223859] psci_checker: Trying to turn off and on again all CPUs
[ 2.267191] IRQ21 no longer affine to CPU0
[ 2.293266] Retrying again to check for CPU kill
[ 2.302269] CPU0 killed.
[ 2.311648] psci_checker: Trying to turn off and on again group 0 (CPUs 0-1)
[ 2.354354] IRQ21 no longer affine to CPU0
[ 2.383222] Retrying again to check for CPU kill
[ 2.392148] CPU0 killed.
[ 2.398063] psci_checker: Hotplug tests passed OK
[ 2.402910] psci_checker: Starting suspend tests (10 cycles per state)
[ 2.410019] psci_checker: cpuidle not available on CPU 0, ignoring
[ 2.416452] psci_checker: cpuidle not available on CPU 1, ignoring
[ 2.422757] psci_checker: Could not start suspend tests on any CPU
[ 2.429370] psci_checker: PSCI checker completed
Signed-off-by: Stefan Agner <stefan.agner@toradex.com>
| -rw-r--r-- | arch/arm/mach-imx/mx7/psci-mx7.c | 20 |
1 files changed, 12 insertions, 8 deletions
diff --git a/arch/arm/mach-imx/mx7/psci-mx7.c b/arch/arm/mach-imx/mx7/psci-mx7.c index 8b839d3..cd72449 100644 --- a/arch/arm/mach-imx/mx7/psci-mx7.c +++ b/arch/arm/mach-imx/mx7/psci-mx7.c @@ -14,8 +14,10 @@ #define GPC_CPU_PGC_SW_PDN_REQ 0xfc #define GPC_CPU_PGC_SW_PUP_REQ 0xf0 +#define GPC_PGC_C0 0x800 #define GPC_PGC_C1 0x840 +#define BM_CPU_PGC_SW_PDN_PUP_REQ_CORE0_A7 0x1 #define BM_CPU_PGC_SW_PDN_PUP_REQ_CORE1_A7 0x2 /* below is for i.MX7D */ @@ -58,22 +60,24 @@ static inline void imx_gpcv2_set_m_core_pgc(bool enable, u32 offset) writel(enable, GPC_IPS_BASE_ADDR + offset); } -__secure void imx_gpcv2_set_core1_power(bool pdn) +__secure void imx_gpcv2_set_core_power(int cpu, bool pdn) { u32 reg = pdn ? GPC_CPU_PGC_SW_PUP_REQ : GPC_CPU_PGC_SW_PDN_REQ; + u32 pgc = cpu ? GPC_PGC_C1 : GPC_PGC_C0; + u32 pdn_pup_req = cpu ? BM_CPU_PGC_SW_PDN_PUP_REQ_CORE1_A7 : + BM_CPU_PGC_SW_PDN_PUP_REQ_CORE0_A7; u32 val; - imx_gpcv2_set_m_core_pgc(true, GPC_PGC_C1); + imx_gpcv2_set_m_core_pgc(true, pgc); val = readl(GPC_IPS_BASE_ADDR + reg); - val |= BM_CPU_PGC_SW_PDN_PUP_REQ_CORE1_A7; + val |= pdn_pup_req; writel(val, GPC_IPS_BASE_ADDR + reg); - while ((readl(GPC_IPS_BASE_ADDR + reg) & - BM_CPU_PGC_SW_PDN_PUP_REQ_CORE1_A7) != 0) + while ((readl(GPC_IPS_BASE_ADDR + reg) & pdn_pup_req) != 0) ; - imx_gpcv2_set_m_core_pgc(false, GPC_PGC_C1); + imx_gpcv2_set_m_core_pgc(false, pgc); } __secure void imx_enable_cpu_ca7(int cpu, bool enable) @@ -116,7 +120,7 @@ __secure s32 psci_cpu_on(u32 __always_unused function_id, u32 mpidr, u32 ep, psci_set_state(cpu, PSCI_AFFINITY_LEVEL_ON_PENDING); - imx_gpcv2_set_core1_power(true); + imx_gpcv2_set_core_power(cpu, true); imx_enable_cpu_ca7(cpu, true); return ARM_PSCI_RET_SUCCESS; @@ -132,7 +136,7 @@ __secure s32 psci_cpu_off(void) psci_set_state(cpu, PSCI_AFFINITY_LEVEL_OFF); imx_enable_cpu_ca7(cpu, false); - imx_gpcv2_set_core1_power(false); + imx_gpcv2_set_core_power(cpu, false); writel(0, SRC_BASE_ADDR + cpu * 8 + SRC_GPR1_MX7D + 4); while (1) |