From: Peng Fan peng.fan@nxp.com
Add basic cpu support, including cpu revision, cpu type, cpu core detection.
Signed-off-by: Peng Fan peng.fan@nxp.com Reviewed-by: Anatolij Gustschin agust@denx.de Cc: Stefano Babic sbabic@denx.de --- arch/arm/mach-imx/imx8/Makefile | 7 +++ arch/arm/mach-imx/imx8/cpu.c | 93 +++++++++++++++++++++++++++++++++ 2 files changed, 100 insertions(+) create mode 100644 arch/arm/mach-imx/imx8/Makefile create mode 100644 arch/arm/mach-imx/imx8/cpu.c
diff --git a/arch/arm/mach-imx/imx8/Makefile b/arch/arm/mach-imx/imx8/Makefile new file mode 100644 index 0000000000..57876139a1 --- /dev/null +++ b/arch/arm/mach-imx/imx8/Makefile @@ -0,0 +1,7 @@ +# +# Copyright 2018 NXP +# +# SPDX-License-Identifier: GPL-2.0+ +# + +obj-y += cpu.o diff --git a/arch/arm/mach-imx/imx8/cpu.c b/arch/arm/mach-imx/imx8/cpu.c new file mode 100644 index 0000000000..0b841e291d --- /dev/null +++ b/arch/arm/mach-imx/imx8/cpu.c @@ -0,0 +1,93 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright 2018 NXP + */ + +#include <common.h> +#include <clk.h> +#include <dm.h> +#include <dm/device-internal.h> +#include <dm/lists.h> +#include <dm/uclass.h> +#include <errno.h> +#include <asm/arch/sci/sci.h> +#include <asm/arch-imx/cpu.h> +#include <asm/armv8/cpu.h> + +DECLARE_GLOBAL_DATA_PTR; + +u32 get_cpu_rev(void) +{ + u32 id = 0, rev = 0; + int ret; + + ret = sc_misc_get_control(-1, SC_R_SYSTEM, SC_C_ID, &id); + if (ret) + return 0; + + rev = (id >> 5) & 0xf; + id = (id & 0x1f) + MXC_SOC_IMX8; /* Dummy ID for chip */ + + return (id << 12) | rev; +} + +#ifdef CONFIG_DISPLAY_CPUINFO +const char *get_imx8_type(u32 imxtype) +{ + switch (imxtype) { + case MXC_CPU_IMX8QXP: + return "8QXP"; + default: + return "??"; + } +} + +const char *get_imx8_rev(u32 rev) +{ + switch (rev) { + case CHIP_REV_A: + return "A"; + case CHIP_REV_B: + return "B"; + default: + return "?"; + } +} + +const char *get_core_name(void) +{ + if (is_cortex_a35()) + return "A35"; + else + return "?"; +} + +int print_cpuinfo(void) +{ + struct udevice *dev; + struct clk cpu_clk; + int ret; + + ret = uclass_get_device(UCLASS_CPU, 0, &dev); + if (ret) + return 0; + + ret = clk_get_by_index(dev, 0, &cpu_clk); + if (ret) { + dev_err(dev, "failed to clk\n"); + return 0; + } + + u32 cpurev; + + cpurev = get_cpu_rev(); + + printf("CPU: Freescale i.MX%s rev%s %s at %ld MHz\n", + get_imx8_type((cpurev & 0xFF000) >> 12), + get_imx8_rev((cpurev & 0xFFF)), + get_core_name(), + clk_get_rate(&cpu_clk) / 1000000); + + return 0; +} +#endif