diff options
Diffstat (limited to 'package/boot/uboot-mediatek/patches/002-0028-cpu-add-basic-cpu-driver-for-MediaTek-ARM-chips.patch')
| -rw-r--r-- | package/boot/uboot-mediatek/patches/002-0028-cpu-add-basic-cpu-driver-for-MediaTek-ARM-chips.patch | 133 |
1 files changed, 133 insertions, 0 deletions
diff --git a/package/boot/uboot-mediatek/patches/002-0028-cpu-add-basic-cpu-driver-for-MediaTek-ARM-chips.patch b/package/boot/uboot-mediatek/patches/002-0028-cpu-add-basic-cpu-driver-for-MediaTek-ARM-chips.patch new file mode 100644 index 0000000000..01871781f0 --- /dev/null +++ b/package/boot/uboot-mediatek/patches/002-0028-cpu-add-basic-cpu-driver-for-MediaTek-ARM-chips.patch @@ -0,0 +1,133 @@ +From e3c707d23a3a5bc1ba9b8c03731a32c3714ae56a Mon Sep 17 00:00:00 2001 +From: Weijie Gao <weijie.gao@mediatek.com> +Date: Wed, 31 Aug 2022 19:05:20 +0800 +Subject: [PATCH 28/32] cpu: add basic cpu driver for MediaTek ARM chips + +Add basic CPU driver used to retrieve CPU model information. + +Signed-off-by: Weijie Gao <weijie.gao@mediatek.com> +--- + drivers/cpu/Makefile | 1 + + drivers/cpu/mtk_cpu.c | 106 ++++++++++++++++++++++++++++++++++++++++++ + 2 files changed, 107 insertions(+) + create mode 100644 drivers/cpu/mtk_cpu.c + +--- a/drivers/cpu/Makefile ++++ b/drivers/cpu/Makefile +@@ -9,6 +9,7 @@ obj-$(CONFIG_CPU) += cpu-uclass.o + obj-$(CONFIG_ARCH_BMIPS) += bmips_cpu.o + obj-$(CONFIG_ARCH_IMX8) += imx8_cpu.o + obj-$(CONFIG_ARCH_AT91) += at91_cpu.o ++obj-$(CONFIG_ARCH_MEDIATEK) += mtk_cpu.o + obj-$(CONFIG_CPU_MPC83XX) += mpc83xx_cpu.o + obj-$(CONFIG_CPU_RISCV) += riscv_cpu.o + obj-$(CONFIG_SANDBOX) += cpu_sandbox.o +--- /dev/null ++++ b/drivers/cpu/mtk_cpu.c +@@ -0,0 +1,106 @@ ++// SPDX-License-Identifier: GPL-2.0 ++/* ++ * Copyright (C) 2022 MediaTek Inc. All rights reserved. ++ * ++ * Author: Weijie Gao <weijie.gao@mediatek.com> ++ */ ++ ++#include <linux/types.h> ++#include <cpu.h> ++#include <dm.h> ++#include <fdt_support.h> ++#include <mapmem.h> ++#include <asm/global_data.h> ++#include <linux/io.h> ++ ++DECLARE_GLOBAL_DATA_PTR; ++ ++struct mtk_cpu_plat { ++ void __iomem *hwver_base; ++}; ++ ++static int mtk_cpu_get_desc(const struct udevice *dev, char *buf, int size) ++{ ++ struct mtk_cpu_plat *plat = dev_get_plat(dev); ++ ++ snprintf(buf, size, "MediaTek MT%04X", readl(plat->hwver_base)); ++ ++ return 0; ++} ++ ++static int mtk_cpu_get_count(const struct udevice *dev) ++{ ++ return 1; ++} ++ ++static int mtk_cpu_get_vendor(const struct udevice *dev, char *buf, int size) ++{ ++ snprintf(buf, size, "MediaTek"); ++ ++ return 0; ++} ++ ++static int mtk_cpu_probe(struct udevice *dev) ++{ ++ struct mtk_cpu_plat *plat = dev_get_plat(dev); ++ const void *fdt = gd->fdt_blob, *reg; ++ int offset, parent, len, na, ns; ++ u64 addr; ++ ++ if (!fdt) ++ return -ENODEV; ++ ++ offset = fdt_path_offset(fdt, "/hwver"); ++ if (offset < 0) ++ return -ENODEV; ++ ++ parent = fdt_parent_offset(fdt, offset); ++ if (parent < 0) ++ return -ENODEV; ++ ++ na = fdt_address_cells(fdt, parent); ++ if (na < 1) ++ return -ENODEV; ++ ++ ns = fdt_size_cells(gd->fdt_blob, parent); ++ if (ns < 0) ++ return -ENODEV; ++ ++ reg = fdt_getprop(gd->fdt_blob, offset, "reg", &len); ++ if (!reg) ++ return -ENODEV; ++ ++ if (ns) ++ addr = fdt_translate_address(fdt, offset, reg); ++ else ++ addr = fdt_read_number(reg, na); ++ ++ plat->hwver_base = map_sysmem(addr, 0); ++ if (!plat->hwver_base) ++ return -EINVAL; ++ ++ return 0; ++} ++ ++static const struct cpu_ops mtk_cpu_ops = { ++ .get_desc = mtk_cpu_get_desc, ++ .get_count = mtk_cpu_get_count, ++ .get_vendor = mtk_cpu_get_vendor, ++}; ++ ++static const struct udevice_id mtk_cpu_ids[] = { ++ { .compatible = "arm,cortex-a7" }, ++ { .compatible = "arm,cortex-a53" }, ++ { .compatible = "arm,cortex-a73" }, ++ { /* sentinel */ } ++}; ++ ++U_BOOT_DRIVER(cpu_mtk) = { ++ .name = "mtk-cpu", ++ .id = UCLASS_CPU, ++ .of_match = mtk_cpu_ids, ++ .ops = &mtk_cpu_ops, ++ .probe = mtk_cpu_probe, ++ .plat_auto = sizeof(struct mtk_cpu_plat), ++ .flags = DM_FLAG_PRE_RELOC, ++}; |