Add basic cpu support, including cpu revision, cpu type,
cpu core detection.
Signed-off-by: Peng Fan <peng....@nxp.com>
Cc: Stefano Babic <sba...@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
--
2.14.1
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