[U-Boot] [PATCH 12/23] imx: mx8m: add soc related settings and files
Peng Fan
peng.fan at nxp.com
Tue Nov 28 12:31:54 UTC 2017
Add SoC level initialization code
- arch_cpu_init
- mmu table
- detect cpu revision
- reset cpu and wdog settings
- M4 boot
- timer init
- wdog settings
- lowlevel init to save/restore registers
- a few dummy header file to avoid build failure
- ft_system_setup and ft_add_optee_node
- mmc env related
Signed-off-by: Peng Fan <peng.fan at nxp.com>
---
arch/arm/include/asm/arch-mx8m/crm_regs.h | 10 +
arch/arm/include/asm/arch-mx8m/gpio.h | 12 +
arch/arm/include/asm/arch-mx8m/sys_proto.h | 17 +
arch/arm/mach-imx/mx8m/Makefile | 3 +-
arch/arm/mach-imx/mx8m/lowlevel_init.S | 63 ++++
arch/arm/mach-imx/mx8m/soc.c | 544 +++++++++++++++++++++++++++++
6 files changed, 648 insertions(+), 1 deletion(-)
create mode 100644 arch/arm/include/asm/arch-mx8m/crm_regs.h
create mode 100644 arch/arm/include/asm/arch-mx8m/gpio.h
create mode 100644 arch/arm/include/asm/arch-mx8m/sys_proto.h
create mode 100644 arch/arm/mach-imx/mx8m/lowlevel_init.S
create mode 100644 arch/arm/mach-imx/mx8m/soc.c
diff --git a/arch/arm/include/asm/arch-mx8m/crm_regs.h b/arch/arm/include/asm/arch-mx8m/crm_regs.h
new file mode 100644
index 0000000000..6582318983
--- /dev/null
+++ b/arch/arm/include/asm/arch-mx8m/crm_regs.h
@@ -0,0 +1,10 @@
+/*
+ * Copyright 2017 NXP
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#ifndef _ASM_ARCH_MX8M_CRM_REGS_H
+#define _ASM_ARCH_MX8M_CRM_REGS_H
+/* Dummy header, some imx-common code needs this file */
+#endif
diff --git a/arch/arm/include/asm/arch-mx8m/gpio.h b/arch/arm/include/asm/arch-mx8m/gpio.h
new file mode 100644
index 0000000000..b666d37700
--- /dev/null
+++ b/arch/arm/include/asm/arch-mx8m/gpio.h
@@ -0,0 +1,12 @@
+/*
+ * Copyright 2017 NXP
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#ifndef __ASM_ARCH_MX8M_GPIO_H
+#define __ASM_ARCH_MX8M_GPIO_H
+
+#include <asm/mach-imx/gpio.h>
+
+#endif
diff --git a/arch/arm/include/asm/arch-mx8m/sys_proto.h b/arch/arm/include/asm/arch-mx8m/sys_proto.h
new file mode 100644
index 0000000000..0ceeba8528
--- /dev/null
+++ b/arch/arm/include/asm/arch-mx8m/sys_proto.h
@@ -0,0 +1,17 @@
+/*
+ * Copyright (C) 2017 NXP
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#ifndef __ARCH_MX8M_SYS_PROTO_H
+#define __ARCH_MX8M_SYS_PROTO_H
+
+#include <asm/mach-imx/sys_proto.h>
+
+void set_wdog_reset(struct wdog_regs *wdog);
+void enable_tzc380(void);
+void restore_boot_params(void);
+extern unsigned long rom_pointer[];
+enum boot_device get_boot_device(void);
+#endif
diff --git a/arch/arm/mach-imx/mx8m/Makefile b/arch/arm/mach-imx/mx8m/Makefile
index 05f38842f0..b1c5d74aab 100644
--- a/arch/arm/mach-imx/mx8m/Makefile
+++ b/arch/arm/mach-imx/mx8m/Makefile
@@ -4,4 +4,5 @@
# SPDX-License-Identifier: GPL-2.0+
#
-obj-y += clock.o clock_slice.o
+obj-y += lowlevel_init.o
+obj-y += clock.o clock_slice.o soc.o
diff --git a/arch/arm/mach-imx/mx8m/lowlevel_init.S b/arch/arm/mach-imx/mx8m/lowlevel_init.S
new file mode 100644
index 0000000000..d388f3ba95
--- /dev/null
+++ b/arch/arm/mach-imx/mx8m/lowlevel_init.S
@@ -0,0 +1,63 @@
+/*
+ * Copyright 2017 NXP
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <config.h>
+
+.align 8
+.global rom_pointer
+rom_pointer:
+ .space 256
+
+/*
+ * Routine: save_boot_params (called after reset from start.S)
+ */
+
+.global save_boot_params
+save_boot_params:
+ /* The firmware provided ATAG/FDT address can be found in r2/x0 */
+ adr x0, rom_pointer
+ stp x1, x2, [x0], #16
+ stp x3, x4, [x0], #16
+ stp x5, x6, [x0], #16
+ stp x7, x8, [x0], #16
+ stp x9, x10, [x0], #16
+ stp x11, x12, [x0], #16
+ stp x13, x14, [x0], #16
+ stp x15, x16, [x0], #16
+ stp x17, x18, [x0], #16
+ stp x19, x20, [x0], #16
+ stp x21, x22, [x0], #16
+ stp x23, x24, [x0], #16
+ stp x25, x26, [x0], #16
+ stp x27, x28, [x0], #16
+ stp x29, x30, [x0], #16
+ mov x30, sp
+ str x30, [x0], #8
+
+ /* Returns */
+ b save_boot_params_ret
+
+.global restore_boot_params
+restore_boot_params:
+ adr x0, rom_pointer
+ ldp x1, x2, [x0], #16
+ ldp x3, x4, [x0], #16
+ ldp x5, x6, [x0], #16
+ ldp x7, x8, [x0], #16
+ ldp x9, x10, [x0], #16
+ ldp x11, x12, [x0], #16
+ ldp x13, x14, [x0], #16
+ ldp x15, x16, [x0], #16
+ ldp x17, x18, [x0], #16
+ ldp x19, x20, [x0], #16
+ ldp x21, x22, [x0], #16
+ ldp x23, x24, [x0], #16
+ ldp x25, x26, [x0], #16
+ ldp x27, x28, [x0], #16
+ ldp x29, x30, [x0], #16
+ ldr x0, [x0]
+ mov sp, x0
+ ret
diff --git a/arch/arm/mach-imx/mx8m/soc.c b/arch/arm/mach-imx/mx8m/soc.c
new file mode 100644
index 0000000000..acf96fc55f
--- /dev/null
+++ b/arch/arm/mach-imx/mx8m/soc.c
@@ -0,0 +1,544 @@
+/*
+ * Copyright 2017 NXP
+ *
+ * Peng Fan <peng.fan at nxp.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/arch/imx-regs.h>
+#include <asm/io.h>
+#include <asm/arch/clock.h>
+#include <asm/arch/sys_proto.h>
+#include <asm/mach-imx/hab.h>
+#include <asm/mach-imx/boot_mode.h>
+#include <asm/armv8/mmu.h>
+#include <errno.h>
+#include <fdt_support.h>
+#include <fsl_wdog.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#if defined(CONFIG_SECURE_BOOT)
+struct imx_sec_config_fuse_t const imx_sec_config_fuse = {
+ .bank = 1,
+ .word = 3,
+};
+#endif
+
+/*
+ * OCOTP_TESTER3[9:8] (see Fusemap Description Table offset 0x440)
+ * defines a 2-bit SPEED_GRADING
+ */
+#define OCOTP_TESTER3_SPEED_SHIFT 8
+#define OCOTP_TESTER3_SPEED_800MHZ 0
+#define OCOTP_TESTER3_SPEED_1GHZ 1
+#define OCOTP_TESTER3_SPEED_1300HZ 2
+#define OCOTP_TESTER3_SPEED_1500HZ 3
+
+u32 get_cpu_speed_grade_hz(void)
+{
+ struct ocotp_regs *ocotp = (struct ocotp_regs *)OCOTP_BASE_ADDR;
+ struct fuse_bank *bank = &ocotp->bank[1];
+ struct fuse_bank1_regs *fuse =
+ (struct fuse_bank1_regs *)bank->fuse_regs;
+ u32 val;
+
+ val = readl(&fuse->tester3);
+ val >>= OCOTP_TESTER3_SPEED_SHIFT;
+ val &= 0x3;
+
+ switch (val) {
+ case OCOTP_TESTER3_SPEED_800MHZ:
+ return 800000000;
+ case OCOTP_TESTER3_SPEED_1GHZ:
+ return 1000000000;
+ case OCOTP_TESTER3_SPEED_1300HZ:
+ return 1300000000;
+ case OCOTP_TESTER3_SPEED_1500HZ:
+ return 1500000000;
+ }
+ return 0;
+}
+
+/*
+ * OCOTP_TESTER3[7:6] (see Fusemap Description Table offset 0x440)
+ * defines a 2-bit SPEED_GRADING
+ */
+#define OCOTP_TESTER3_TEMP_SHIFT 6
+
+/* CPU Temperature Grades */
+#define TEMP_COMMERCIAL 0
+#define TEMP_EXTCOMMERCIAL 1
+#define TEMP_INDUSTRIAL 2
+#define TEMP_AUTOMOTIVE 3
+
+u32 get_cpu_temp_grade(int *minc, int *maxc)
+{
+ struct ocotp_regs *ocotp = (struct ocotp_regs *)OCOTP_BASE_ADDR;
+ struct fuse_bank *bank = &ocotp->bank[1];
+ struct fuse_bank1_regs *fuse =
+ (struct fuse_bank1_regs *)bank->fuse_regs;
+ u32 val;
+
+ val = readl(&fuse->tester3);
+ val >>= OCOTP_TESTER3_TEMP_SHIFT;
+ val &= 0x3;
+
+ if (minc && maxc) {
+ if (val == TEMP_AUTOMOTIVE) {
+ *minc = -40;
+ *maxc = 125;
+ } else if (val == TEMP_INDUSTRIAL) {
+ *minc = -40;
+ *maxc = 105;
+ } else if (val == TEMP_EXTCOMMERCIAL) {
+ *minc = -20;
+ *maxc = 105;
+ } else {
+ *minc = 0;
+ *maxc = 95;
+ }
+ }
+ return val;
+}
+
+int timer_init(void)
+{
+#ifdef CONFIG_SPL_BUILD
+ void __iomem *sctr_base = (void __iomem *)SCTR_BASE_ADDR;
+ unsigned long freq;
+ u32 val;
+
+ freq = readl(sctr_base + CNTFID0_OFF);
+
+ /* Update with accurate clock frequency */
+ asm volatile("msr cntfrq_el0, %0" : : "r" (freq) : "memory");
+
+ val = readl(sctr_base + CNTCR_OFF);
+ val &= ~(SC_CNTCR_FREQ0 | SC_CNTCR_FREQ1);
+ val |= SC_CNTCR_FREQ0 | SC_CNTCR_ENABLE | SC_CNTCR_HDBG;
+ writel(val, sctr_base + CNTCR_OFF);
+#endif
+
+ gd->arch.tbl = 0;
+ gd->arch.tbu = 0;
+
+ return 0;
+}
+
+void enable_tzc380(void)
+{
+ u32 val;
+
+ /* Enable TZASC and lock setting */
+ val = readl(IOMUXC_GPR10);
+ val |= GPR_TZASC_EN;
+ writel(val, IOMUXC_GPR10);
+ val |= GPR_TZASC_EN_LOCK;
+ writel(val, IOMUXC_GPR10);
+}
+
+void set_wdog_reset(struct wdog_regs *wdog)
+{
+ u32 reg = readw(&wdog->wcr);
+ /*
+ * Output WDOG_B signal to reset external pmic or POR_B decided by
+ * the board desgin. Without external reset, the peripherals/DDR/
+ * PMIC are not reset, that may cause system working abnormal.
+ */
+ reg = readw(&wdog->wcr);
+ reg |= 1 << 3;
+ /*
+ * WDZST bit is write-once only bit. Align this bit in kernel,
+ * otherwise kernel code will have no chance to set this bit.
+ */
+ reg |= 1 << 0;
+ writew(reg, &wdog->wcr);
+}
+
+static struct mm_region imx8m_mem_map[] = {
+ {
+ .virt = 0x0UL,
+ .phys = 0x0UL,
+ .size = 0x100000UL,
+ .attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) |
+ PTE_BLOCK_OUTER_SHARE
+ }, {
+ .virt = 0x100000UL,
+ .phys = 0x100000UL,
+ .size = 0x8000UL,
+ .attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) |
+ PTE_BLOCK_NON_SHARE |
+ PTE_BLOCK_PXN | PTE_BLOCK_UXN
+ }, {
+ .virt = 0x7C0000UL,
+ .phys = 0x7C0000UL,
+ .size = 0x80000UL,
+ .attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) |
+ PTE_BLOCK_NON_SHARE |
+ PTE_BLOCK_PXN | PTE_BLOCK_UXN
+ }, {
+ .virt = 0x900000UL,
+ .phys = 0x900000UL,
+ .size = 0x200000UL,
+ .attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) |
+ PTE_BLOCK_OUTER_SHARE
+ }, {
+ .virt = 0xB00000UL,
+ .phys = 0xB00000UL,
+ .size = 0x3f500000UL,
+ .attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) |
+ PTE_BLOCK_NON_SHARE |
+ PTE_BLOCK_PXN | PTE_BLOCK_UXN
+ }, {
+ .virt = 0x40000000UL,
+ .phys = 0x40000000UL,
+ .size = 0xC0000000UL,
+ .attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) |
+ PTE_BLOCK_OUTER_SHARE
+ }, {
+ .virt = 0x100000000UL,
+ .phys = 0x100000000UL,
+ .size = 0x040000000UL,
+ .attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) |
+ PTE_BLOCK_OUTER_SHARE
+ }, {
+ /* List terminator */
+ 0,
+ }
+};
+
+struct mm_region *mem_map = imx8m_mem_map;
+
+u32 get_cpu_rev(void)
+{
+ u32 reg = readl((void __iomem *)DIGPROG);
+ u32 type = (reg >> 16) & 0xff;
+ u32 rom_version;
+
+ reg &= 0xff;
+
+ if (reg == 0x10) {
+ /*
+ * For B0 chip, the DIGPROG is not updated, still TO1.0.
+ * we have to check ROM version further
+ */
+ rom_version = readl((void __iomem *)0x800);
+ if (rom_version != 0x10) {
+ rom_version = readl((void __iomem *)0x83c);
+ if (rom_version >= 0x20)
+ reg = 0x20;
+ }
+ }
+
+ return (type << 12) | reg;
+}
+
+void imx_set_wdog_powerdown(bool enable)
+{
+ struct wdog_regs *wdog1 = (struct wdog_regs *)WDOG1_BASE_ADDR;
+ struct wdog_regs *wdog2 = (struct wdog_regs *)WDOG2_BASE_ADDR;
+ struct wdog_regs *wdog3 = (struct wdog_regs *)WDOG3_BASE_ADDR;
+
+ /* Write to the PDE (Power Down Enable) bit */
+ writew(enable, &wdog1->wmcr);
+ writew(enable, &wdog2->wmcr);
+ writew(enable, &wdog3->wmcr);
+}
+
+int arch_cpu_init(void)
+{
+ /*
+ * Init timer at very early state, because sscg pll setting
+ * will use it
+ */
+ timer_init();
+ clock_init();
+
+ imx_set_wdog_powerdown(false);
+
+ return 0;
+}
+
+#if defined(CONFIG_FEC_MXC)
+void imx_get_mac_from_fuse(int dev_id, unsigned char *mac)
+{
+ struct ocotp_regs *ocotp = (struct ocotp_regs *)OCOTP_BASE_ADDR;
+ struct fuse_bank *bank = &ocotp->bank[9];
+ struct fuse_bank9_regs *fuse =
+ (struct fuse_bank9_regs *)bank->fuse_regs;
+ u32 value = readl(&fuse->mac_addr1);
+
+ mac[0] = (value >> 8);
+ mac[1] = value;
+
+ value = readl(&fuse->mac_addr0);
+ mac[2] = value >> 24;
+ mac[3] = value >> 16;
+ mac[4] = value >> 8;
+ mac[5] = value;
+}
+#endif
+
+#ifdef CONFIG_IMX_BOOTAUX
+#define FSL_SIP_SRC 0xC2000005
+#define FSL_SIP_SRC_M4_START 0x00
+#define FSL_SIP_SRC_M4_STARTED 0x01
+int arch_auxiliary_core_up(u32 core_id, ulong boot_private_data)
+{
+ u32 stack, pc;
+
+ if (!boot_private_data)
+ return -EINVAL;
+
+ stack = *(u32 *)boot_private_data;
+ pc = *(u32 *)(boot_private_data + 4);
+
+ /* Set the stack and pc to M4 bootROM */
+ writel(stack, M4_BOOTROM_BASE_ADDR);
+ writel(pc, M4_BOOTROM_BASE_ADDR + 4);
+
+ /* Enable M4 */
+ call_imx_sip(FSL_SIP_SRC, FSL_SIP_SRC_M4_START, 0, 0);
+
+ return 0;
+}
+
+int arch_auxiliary_core_check_up(u32 core_id)
+{
+ return call_imx_sip(FSL_SIP_SRC, FSL_SIP_SRC_M4_STARTED, 0, 0);
+}
+#endif
+
+enum boot_device get_boot_device(void)
+{
+ struct bootrom_sw_info **p =
+ is_soc_rev(CHIP_REV_1_0) ?
+ (struct bootrom_sw_info **)ROM_SW_INFO_ADDR_A0 :
+ (struct bootrom_sw_info **)ROM_SW_INFO_ADDR;
+
+ enum boot_device boot_dev = SD1_BOOT;
+ u8 boot_type = (*p)->boot_dev_type;
+ u8 boot_instance = (*p)->boot_dev_instance;
+
+ switch (boot_type) {
+ case BOOT_TYPE_SD:
+ boot_dev = boot_instance + SD1_BOOT;
+ break;
+ case BOOT_TYPE_MMC:
+ boot_dev = boot_instance + MMC1_BOOT;
+ break;
+ case BOOT_TYPE_NAND:
+ boot_dev = NAND_BOOT;
+ break;
+ case BOOT_TYPE_QSPI:
+ boot_dev = QSPI_BOOT;
+ break;
+ case BOOT_TYPE_WEIM:
+ boot_dev = WEIM_NOR_BOOT;
+ break;
+ case BOOT_TYPE_SPINOR:
+ boot_dev = SPI_NOR_BOOT;
+ break;
+ case BOOT_TYPE_USB:
+ boot_dev = USB_BOOT;
+ break;
+ default:
+ break;
+ }
+
+ return boot_dev;
+}
+
+bool is_usb_boot(void)
+{
+ return get_boot_device() == USB_BOOT;
+}
+
+#ifdef CONFIG_ENV_IS_IN_MMC
+__weak int board_mmc_get_env_dev(int devno)
+{
+ return CONFIG_SYS_MMC_ENV_DEV;
+}
+
+int mmc_get_env_dev(void)
+{
+ struct bootrom_sw_info **p =
+ is_soc_rev(CHIP_REV_1_0) ?
+ (struct bootrom_sw_info **)ROM_SW_INFO_ADDR_A0 :
+ (struct bootrom_sw_info **)ROM_SW_INFO_ADDR;
+ int devno = (*p)->boot_dev_instance;
+ u8 boot_type = (*p)->boot_dev_type;
+
+ /* If not boot from sd/mmc, use default value */
+ if ((boot_type != BOOT_TYPE_SD) && (boot_type != BOOT_TYPE_MMC))
+ return CONFIG_SYS_MMC_ENV_DEV;
+
+ return board_mmc_get_env_dev(devno);
+}
+#endif
+
+#ifdef CONFIG_OF_SYSTEM_SETUP
+static int ft_add_optee_node(void *fdt, bd_t *bd)
+{
+ const char *path, *subpath;
+ int offs;
+
+ /*
+ * No TEE space allocated indicating no TEE running, so no
+ * need to add optee node in dts
+ */
+ if (!rom_pointer[1])
+ return 0;
+
+ offs = fdt_increase_size(fdt, 512);
+ if (offs) {
+ printf("No Space for dtb\n");
+ return 1;
+ }
+
+ path = "/firmware";
+ offs = fdt_path_offset(fdt, path);
+ if (offs < 0) {
+ path = "/";
+ offs = fdt_path_offset(fdt, path);
+
+ if (offs < 0) {
+ printf("Could not find root node.\n");
+ return 1;
+ }
+
+ subpath = "firmware";
+ offs = fdt_add_subnode(fdt, offs, subpath);
+ if (offs < 0)
+ printf("Could not create %s node.\n", subpath);
+ }
+
+ subpath = "optee";
+ offs = fdt_add_subnode(fdt, offs, subpath);
+ if (offs < 0)
+ printf("Could not create %s node.\n", subpath);
+
+ fdt_setprop_string(fdt, offs, "compatible", "linaro,optee-tz");
+ fdt_setprop_string(fdt, offs, "method", "smc");
+
+ return 0;
+}
+
+int ft_system_setup(void *blob, bd_t *bd)
+{
+ static const char * const status = "disabled";
+ static const char * const usb_dwc3_path = "/usb at 38100000/dwc3";
+ static const char * const speed = "high-speed";
+
+ int i = 0;
+ int rc;
+ int nodeoff;
+
+ if (get_boot_device() == USB_BOOT) {
+ static const char * const nodes_path[] = {
+ "/dcss at 32e00000",
+ "/hdmi at 32c00000",
+ "/hdmi_cec at 32c33800",
+ "/hdmi_drm at 32c00000",
+ "/display-subsystem",
+ "/sound-hdmi"
+ };
+
+ for (i = 0; i < ARRAY_SIZE(nodes_path); i++) {
+ nodeoff = fdt_path_offset(blob, nodes_path[i]);
+ if (nodeoff < 0)
+ continue; /* Not found, skip it */
+
+ printf("Found %s node\n", nodes_path[i]);
+
+add_status:
+ rc = fdt_setprop(blob, nodeoff, "status", status,
+ strlen(status) + 1);
+ if (rc) {
+ if (rc == -FDT_ERR_NOSPACE) {
+ rc = fdt_increase_size(blob, 512);
+ if (!rc)
+ goto add_status;
+ }
+ printf("Unable to update property %s:%s, err=%s\n",
+ nodes_path[i], "status",
+ fdt_strerror(rc));
+ } else {
+ printf("Modify %s:%s disabled\n",
+ nodes_path[i], "status");
+ }
+ }
+
+ nodeoff = fdt_path_offset(blob, usb_dwc3_path);
+ if (nodeoff >= 0) {
+ printf("Found %s node\n", usb_dwc3_path);
+
+usb_modify_speed:
+
+ rc = fdt_setprop(blob, nodeoff, "maximum-speed",
+ speed, strlen(speed) + 1);
+ if (rc) {
+ if (rc == -FDT_ERR_NOSPACE) {
+ rc = fdt_increase_size(blob, 512);
+ if (!rc)
+ goto usb_modify_speed;
+ }
+ printf("Unable to set property %s:%s, err=%s\n",
+ usb_dwc3_path, "maximum-speed",
+ fdt_strerror(rc));
+ } else {
+ printf("Modify %s:%s = %s\n",
+ usb_dwc3_path, "maximum-speed", speed);
+ }
+ } else {
+ printf("Can't found %s node\n", usb_dwc3_path);
+ }
+ }
+
+ /* Disable the CPU idle for A0 chip since the HW does not support it */
+ if (is_soc_rev(CHIP_REV_1_0)) {
+ static const char * const nodes_path[] = {
+ "/cpus/cpu at 0",
+ "/cpus/cpu at 1",
+ "/cpus/cpu at 2",
+ "/cpus/cpu at 3",
+ };
+
+ for (i = 0; i < ARRAY_SIZE(nodes_path); i++) {
+ nodeoff = fdt_path_offset(blob, nodes_path[i]);
+ if (nodeoff < 0)
+ continue; /* Not found, skip it */
+
+ printf("Found %s node\n", nodes_path[i]);
+
+ rc = fdt_delprop(blob, nodeoff, "cpu-idle-states");
+ if (rc) {
+ printf("Unable to update property %s:%s, err=%s\n",
+ nodes_path[i], "status", fdt_strerror(rc));
+ } else {
+ printf("Remove %s:%s\n",
+ nodes_path[i], "cpu-idle-states");
+ }
+ }
+ }
+
+ return ft_add_optee_node(blob, bd);
+}
+#endif
+
+void reset_cpu(ulong addr)
+{
+ struct watchdog_regs *wdog = (struct watchdog_regs *)WDOG1_BASE_ADDR;
+
+ /* Clear WDA to trigger WDOG_B immediately */
+ writew((WCR_WDE | WCR_SRS), &wdog->wcr);
+
+ while (1) {
+ /*
+ * spin for .5 seconds before reset
+ */
+ }
+}
--
2.14.1
More information about the U-Boot
mailing list