From 43c50873854204cc5ca810516e160afb512303be Mon Sep 17 00:00:00 2001 From: Peng Fan Date: Mon, 26 Aug 2019 08:12:19 +0000 Subject: [PATCH] imx8: move i.MX8 cpu desc code to drivers/cpu/imx8_cpu.c Move cpu desc code to cpu driver directory and name it imx8_cpu.c No functional change. Signed-off-by: Peng Fan --- arch/arm/mach-imx/imx8/cpu.c | 168 -------------------------------- drivers/cpu/Makefile | 1 + drivers/cpu/imx8_cpu.c | 182 +++++++++++++++++++++++++++++++++++ 3 files changed, 183 insertions(+), 168 deletions(-) create mode 100644 drivers/cpu/imx8_cpu.c diff --git a/arch/arm/mach-imx/imx8/cpu.c b/arch/arm/mach-imx/imx8/cpu.c index 1a5d811373..4e6120cc03 100644 --- a/arch/arm/mach-imx/imx8/cpu.c +++ b/arch/arm/mach-imx/imx8/cpu.c @@ -528,171 +528,3 @@ u32 get_cpu_rev(void) return (id << 12) | rev; } -#if CONFIG_IS_ENABLED(CPU) -struct cpu_imx_platdata { - const char *name; - const char *rev; - const char *type; - u32 cpurev; - u32 freq_mhz; -}; - -const char *get_imx8_type(u32 imxtype) -{ - switch (imxtype) { - case MXC_CPU_IMX8QXP: - case MXC_CPU_IMX8QXP_A0: - return "QXP"; - case MXC_CPU_IMX8QM: - return "QM"; - 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 if (is_cortex_a53()) - return "A53"; - else if (is_cortex_a72()) - return "A72"; - else - return "?"; -} - -#if IS_ENABLED(CONFIG_IMX_SCU_THERMAL) -static int cpu_imx_get_temp(void) -{ - struct udevice *thermal_dev; - int cpu_tmp, ret; - - ret = uclass_get_device_by_name(UCLASS_THERMAL, "cpu-thermal0", - &thermal_dev); - - if (!ret) { - ret = thermal_get_temp(thermal_dev, &cpu_tmp); - if (ret) - return 0xdeadbeef; - } else { - return 0xdeadbeef; - } - - return cpu_tmp; -} -#else -static int cpu_imx_get_temp(void) -{ - return 0; -} -#endif - -int cpu_imx_get_desc(struct udevice *dev, char *buf, int size) -{ - struct cpu_imx_platdata *plat = dev_get_platdata(dev); - int ret; - - if (size < 100) - return -ENOSPC; - - ret = snprintf(buf, size, "NXP i.MX8%s Rev%s %s at %u MHz", - plat->type, plat->rev, plat->name, plat->freq_mhz); - - if (IS_ENABLED(CONFIG_IMX_SCU_THERMAL)) { - buf = buf + ret; - size = size - ret; - ret = snprintf(buf, size, " at %dC", cpu_imx_get_temp()); - } - - snprintf(buf + ret, size - ret, "\n"); - - return 0; -} - -static int cpu_imx_get_info(struct udevice *dev, struct cpu_info *info) -{ - struct cpu_imx_platdata *plat = dev_get_platdata(dev); - - info->cpu_freq = plat->freq_mhz * 1000; - info->features = BIT(CPU_FEAT_L1_CACHE) | BIT(CPU_FEAT_MMU); - return 0; -} - -static int cpu_imx_get_count(struct udevice *dev) -{ - return 4; -} - -static int cpu_imx_get_vendor(struct udevice *dev, char *buf, int size) -{ - snprintf(buf, size, "NXP"); - return 0; -} - -static const struct cpu_ops cpu_imx8_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, -}; - -static const struct udevice_id cpu_imx8_ids[] = { - { .compatible = "arm,cortex-a35" }, - { .compatible = "arm,cortex-a53" }, - { } -}; - -static ulong imx8_get_cpu_rate(void) -{ - ulong rate; - int ret; - int type = is_cortex_a35() ? SC_R_A35 : is_cortex_a53() ? - SC_R_A53 : SC_R_A72; - - ret = sc_pm_get_clock_rate(-1, type, SC_PM_CLK_CPU, - (sc_pm_clock_rate_t *)&rate); - if (ret) { - printf("Could not read CPU frequency: %d\n", ret); - return 0; - } - - return rate; -} - -static int imx8_cpu_probe(struct udevice *dev) -{ - struct cpu_imx_platdata *plat = dev_get_platdata(dev); - u32 cpurev; - - cpurev = get_cpu_rev(); - plat->cpurev = cpurev; - plat->name = get_core_name(); - plat->rev = get_imx8_rev(cpurev & 0xFFF); - plat->type = get_imx8_type((cpurev & 0xFF000) >> 12); - plat->freq_mhz = imx8_get_cpu_rate() / 1000000; - return 0; -} - -U_BOOT_DRIVER(cpu_imx8_drv) = { - .name = "imx8x_cpu", - .id = UCLASS_CPU, - .of_match = cpu_imx8_ids, - .ops = &cpu_imx8_ops, - .probe = imx8_cpu_probe, - .platdata_auto_alloc_size = sizeof(struct cpu_imx_platdata), - .flags = DM_FLAG_PRE_RELOC, -}; -#endif diff --git a/drivers/cpu/Makefile b/drivers/cpu/Makefile index be0300cd4a..0b5dbc7c88 100644 --- a/drivers/cpu/Makefile +++ b/drivers/cpu/Makefile @@ -7,6 +7,7 @@ obj-$(CONFIG_CPU) += cpu-uclass.o obj-$(CONFIG_ARCH_BMIPS) += bmips_cpu.o +obj-$(CONFIG_ARCH_IMX8) += imx8_cpu.o obj-$(CONFIG_CPU_MPC83XX) += mpc83xx_cpu.o obj-$(CONFIG_CPU_RISCV) += riscv_cpu.o obj-$(CONFIG_SANDBOX) += cpu_sandbox.o diff --git a/drivers/cpu/imx8_cpu.c b/drivers/cpu/imx8_cpu.c new file mode 100644 index 0000000000..95653683ac --- /dev/null +++ b/drivers/cpu/imx8_cpu.c @@ -0,0 +1,182 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright 2019 NXP + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +DECLARE_GLOBAL_DATA_PTR; + +struct cpu_imx_platdata { + const char *name; + const char *rev; + const char *type; + u32 cpurev; + u32 freq_mhz; +}; + +const char *get_imx8_type(u32 imxtype) +{ + switch (imxtype) { + case MXC_CPU_IMX8QXP: + case MXC_CPU_IMX8QXP_A0: + return "QXP"; + case MXC_CPU_IMX8QM: + return "QM"; + 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 if (is_cortex_a53()) + return "A53"; + else if (is_cortex_a72()) + return "A72"; + else + return "?"; +} + +#if IS_ENABLED(CONFIG_IMX_SCU_THERMAL) +static int cpu_imx_get_temp(void) +{ + struct udevice *thermal_dev; + int cpu_tmp, ret; + + ret = uclass_get_device_by_name(UCLASS_THERMAL, "cpu-thermal0", + &thermal_dev); + + if (!ret) { + ret = thermal_get_temp(thermal_dev, &cpu_tmp); + if (ret) + return 0xdeadbeef; + } else { + return 0xdeadbeef; + } + + return cpu_tmp; +} +#else +static int cpu_imx_get_temp(void) +{ + return 0; +} +#endif + +int cpu_imx_get_desc(struct udevice *dev, char *buf, int size) +{ + struct cpu_imx_platdata *plat = dev_get_platdata(dev); + int ret; + + if (size < 100) + return -ENOSPC; + + ret = snprintf(buf, size, "NXP i.MX8%s Rev%s %s at %u MHz", + plat->type, plat->rev, plat->name, plat->freq_mhz); + + if (IS_ENABLED(CONFIG_IMX_SCU_THERMAL)) { + buf = buf + ret; + size = size - ret; + ret = snprintf(buf, size, " at %dC", cpu_imx_get_temp()); + } + + snprintf(buf + ret, size - ret, "\n"); + + return 0; +} + +static int cpu_imx_get_info(struct udevice *dev, struct cpu_info *info) +{ + struct cpu_imx_platdata *plat = dev_get_platdata(dev); + + info->cpu_freq = plat->freq_mhz * 1000; + info->features = BIT(CPU_FEAT_L1_CACHE) | BIT(CPU_FEAT_MMU); + return 0; +} + +static int cpu_imx_get_count(struct udevice *dev) +{ + return 4; +} + +static int cpu_imx_get_vendor(struct udevice *dev, char *buf, int size) +{ + snprintf(buf, size, "NXP"); + return 0; +} + +static const struct cpu_ops cpu_imx8_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, +}; + +static const struct udevice_id cpu_imx8_ids[] = { + { .compatible = "arm,cortex-a35" }, + { .compatible = "arm,cortex-a53" }, + { } +}; + +static ulong imx8_get_cpu_rate(void) +{ + ulong rate; + int ret; + int type = is_cortex_a35() ? SC_R_A35 : is_cortex_a53() ? + SC_R_A53 : SC_R_A72; + + ret = sc_pm_get_clock_rate(-1, type, SC_PM_CLK_CPU, + (sc_pm_clock_rate_t *)&rate); + if (ret) { + printf("Could not read CPU frequency: %d\n", ret); + return 0; + } + + return rate; +} + +static int imx8_cpu_probe(struct udevice *dev) +{ + struct cpu_imx_platdata *plat = dev_get_platdata(dev); + u32 cpurev; + + cpurev = get_cpu_rev(); + plat->cpurev = cpurev; + plat->name = get_core_name(); + plat->rev = get_imx8_rev(cpurev & 0xFFF); + plat->type = get_imx8_type((cpurev & 0xFF000) >> 12); + plat->freq_mhz = imx8_get_cpu_rate() / 1000000; + return 0; +} + +U_BOOT_DRIVER(cpu_imx8_drv) = { + .name = "imx8x_cpu", + .id = UCLASS_CPU, + .of_match = cpu_imx8_ids, + .ops = &cpu_imx8_ops, + .probe = imx8_cpu_probe, + .platdata_auto_alloc_size = sizeof(struct cpu_imx_platdata), + .flags = DM_FLAG_PRE_RELOC, +}; -- 2.39.5