[Patch V3 31/44] arm: imx8ulp: Probe the S400 MU device in arch init

Peng Fan (OSS)
2021-07-19T07:19:36Z

From: Ye Li <ye.li@nxp.com>

Need probe the S400 MU device in arch_cpu_init_dm, so we can use
S400 API in u-boot

Signed-off-by: Ye Li <ye.li@nxp.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
---
arch/arm/mach-imx/imx8ulp/soc.c | 35 ++++++++++++++++++++++++++++++++-
1 file changed, 34 insertions(+), 1 deletion(-)

diff --git a/arch/arm/mach-imx/imx8ulp/soc.c b/arch/arm/mach-imx/imx8ulp/soc.c
index c5e20408c6..8828a94318 100644
--- a/arch/arm/mach-imx/imx8ulp/soc.c
+++ b/arch/arm/mach-imx/imx8ulp/soc.c
@@ -16,6 +16,12 @@
#include <asm/arch/mu_hal.h>
#include <cpu_func.h>
#include <asm/setup.h>
+#include <dm.h>
+#include <dm/device-internal.h>
+#include <dm/lists.h>
+#include <dm/uclass.h>
+#include <dm/device.h>
+#include <dm/uclass-internal.h>

DECLARE_GLOBAL_DATA_PTR;

@@ -322,7 +328,18 @@ int dram_init(void)
#ifdef CONFIG_SERIAL_TAG
void get_board_serial(struct tag_serialnr *serialnr)
{
- /* TODO */
+ u32 uid[4];
+ u32 res;
+ int ret;
+
+ ret = ahab_read_common_fuse(1, uid, 4, &res);
+ if (ret)
+ printf("ahab read fuse failed %d, 0x%x\n", ret, res);
+ else
+ printf("UID 0x%x,0x%x,0x%x,0x%x\n", uid[0], uid[1], uid[2], uid[3]);
+
+ serialnr->low = uid[0];
+ serialnr->high = uid[3];
}
#endif

@@ -396,6 +413,22 @@ int arch_cpu_init(void)
return 0;
}

+int arch_cpu_init_dm(void)
+{
+ struct udevice *devp;
+ int node, ret;
+
+ node = fdt_node_offset_by_compatible(gd->fdt_blob, -1, "fsl,imx8ulp-mu");
+
+ ret = uclass_get_device_by_of_offset(UCLASS_MISC, node, &devp);
+ if (ret) {
+ printf("could not get S400 mu %d\n", ret);
+ return ret;
+ }
+
+ return 0;
+}
+
#if defined(CONFIG_SPL_BUILD)
__weak void __noreturn jump_to_image_no_args(struct spl_image_info *spl_image)
{
--
2.30.0