[07/21] hw/arm/fsl-imx8mp: Add SNVS

Commit Message

Bernhard Beschow Jan. 20, 2025, 8:37 p.m. UTC

SNVS contains an RTC which allows Linux to deal correctly with time. This is
particularly useful when handling persistent storage which will be done in the
next patch.

Signed-off-by: Bernhard Beschow <[e-mail]>
---
 docs/system/arm/imx8mp-evk.rst |  1 +
 include/hw/arm/fsl-imx8mp.h    |  2 ++
 hw/arm/fsl-imx8mp.c            | 10 ++++++++++
 3 files changed, 13 insertions(+)

Patch

diff --git a/docs/system/arm/imx8mp-evk.rst b/docs/system/arm/imx8mp-evk.rst
index 3de4a73530..d7d08cc198 100644
--- a/docs/system/arm/imx8mp-evk.rst
+++ b/docs/system/arm/imx8mp-evk.rst
@@ -13,6 +13,7 @@  The ``imx8mp-evk`` machine implements the following devices:
  * Up to 4 Cortex-A53 Cores
  * Generic Interrupt Controller (GICv3)
  * 4 UARTs
+ * Secure Non-Volatile Storage (SNVS) including an RTC
  * Clock Tree
 
 Boot options
diff --git a/include/hw/arm/fsl-imx8mp.h b/include/hw/arm/fsl-imx8mp.h
index 979cdbd8c4..9d2a757c2a 100644
--- a/include/hw/arm/fsl-imx8mp.h
+++ b/include/hw/arm/fsl-imx8mp.h
@@ -12,6 +12,7 @@ 
 #include "cpu.h"
 #include "hw/char/imx_serial.h"
 #include "hw/intc/arm_gicv3_common.h"
+#include "hw/misc/imx7_snvs.h"
 #include "hw/misc/imx8mp_ccm.h"
 #include "qom/object.h"
 #include "qemu/units.h"
@@ -35,6 +36,7 @@  struct FslImx8mpState {
     GICv3State         gic;
     IMX8MPCCMState     ccm;
     IMX8MPAnalogState  analog;
+    IMX7SNVSState      snvs;
     IMXSerialState     uart[FSL_IMX8MP_NUM_UARTS];
 };
 
diff --git a/hw/arm/fsl-imx8mp.c b/hw/arm/fsl-imx8mp.c
index 311b8ee0cd..0abde2b1fc 100644
--- a/hw/arm/fsl-imx8mp.c
+++ b/hw/arm/fsl-imx8mp.c
@@ -204,6 +204,8 @@  static void fsl_imx8mp_init(Object *obj)
 
     object_initialize_child(obj, "analog", &s->analog, TYPE_IMX8MP_ANALOG);
 
+    object_initialize_child(obj, "snvs", &s->snvs, TYPE_IMX7_SNVS);
+
     for (i = 0; i < FSL_IMX8MP_NUM_UARTS; i++) {
         snprintf(name, NAME_SIZE, "uart%d", i + 1);
         object_initialize_child(obj, name, &s->uart[i], TYPE_IMX_SERIAL);
@@ -348,6 +350,13 @@  static void fsl_imx8mp_realize(DeviceState *dev, Error **errp)
                            qdev_get_gpio_in(gicdev, serial_table[i].irq));
     }
 
+    /* SNVS */
+    if (!sysbus_realize(SYS_BUS_DEVICE(&s->snvs), errp)) {
+        return;
+    }
+    sysbus_mmio_map(SYS_BUS_DEVICE(&s->snvs), 0,
+                    fsl_imx8mp_memmap[FSL_IMX8MP_SNVS_HP].addr);
+
     /* Unimplemented devices */
     for (i = 0; i < ARRAY_SIZE(fsl_imx8mp_memmap); i++) {
         switch (i) {
@@ -356,6 +365,7 @@  static void fsl_imx8mp_realize(DeviceState *dev, Error **errp)
         case FSL_IMX8MP_GIC_DIST:
         case FSL_IMX8MP_GIC_REDIST:
         case FSL_IMX8MP_RAM:
+        case FSL_IMX8MP_SNVS_HP:
         case FSL_IMX8MP_UART1 ... FSL_IMX8MP_UART4:
             /* device implemented and treated above */
             break;