From: Hou Zhiqiang Zhiqiang.Hou@nxp.com
Release the secondary cores through the PSCI request.
Signed-off-by: Hou Zhiqiang Zhiqiang.Hou@nxp.com --- V3: - No change.
drivers/cpu/imx8_cpu.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+)
diff --git a/drivers/cpu/imx8_cpu.c b/drivers/cpu/imx8_cpu.c index c1315cc32dd..8525eba37c6 100644 --- a/drivers/cpu/imx8_cpu.c +++ b/drivers/cpu/imx8_cpu.c @@ -7,6 +7,7 @@ #include <dm.h> #include <thermal.h> #include <asm/global_data.h> +#include <asm/ptrace.h> #include <asm/system.h> #include <firmware/imx/sci/sci.h> #include <asm/arch/sys_proto.h> @@ -15,6 +16,7 @@ #include <imx_thermal.h> #include <linux/bitops.h> #include <linux/clk-provider.h> +#include <linux/psci.h>
DECLARE_GLOBAL_DATA_PTR;
@@ -242,12 +244,34 @@ static int cpu_imx_is_current(struct udevice *dev) return 0; }
+static int cpu_imx_release_core(const struct udevice *dev, phys_addr_t addr) +{ + struct cpu_imx_plat *plat = dev_get_plat(dev); + struct pt_regs regs; + + regs.regs[0] = PSCI_0_2_FN64_CPU_ON; + regs.regs[1] = plat->mpidr; + regs.regs[2] = addr; + regs.regs[3] = 0; + + smc_call(®s); + if (regs.regs[0]) { + printf("Failed to release CPU core (mpidr: 0x%x)\n", plat->mpidr); + return -1; + } + + printf("Released CPU core (mpidr: 0x%x) to address 0x%llx\n", plat->mpidr, addr); + + return 0; +} + static const struct cpu_ops cpu_imx_ops = { .get_desc = cpu_imx_get_desc, .get_info = cpu_imx_get_info, .get_count = cpu_imx_get_count, .get_vendor = cpu_imx_get_vendor, .is_current = cpu_imx_is_current, + .release_core = cpu_imx_release_core, };
static const struct udevice_id cpu_imx_ids[] = {