[ot] hw/opentitan: Add GPIO device

Signed-off-by: Samuel Ortiz <[email protected]>
Signed-off-by: Emmanuel Blot <[email protected]>

Author: rivos-eblot

docs/opentitan/gpio.md

@@ -0,0 +1,15 @@
+# OT GPIO
+
+## Initial configuration
+
+It is possible to configure initial values of the GPIO input pins:
+
+OpenTitan GPIO driver accept a global option:
+
+- `ot-gpio.in` that defines the input values of the GPIO port as a 32-bit value
+
+### Example
+
+```
+-global ot-gpio.in=0x00ffff00
+```

hw/opentitan/Kconfig

@@ -31,6 +31,9 @@ config OT_ENTROPY_SRC
 config OT_FLASH
     bool
 
+config OT_GPIO
+    bool
+
 config OT_HMAC
     bool
 

hw/opentitan/meson.build

@@ -14,6 +14,7 @@ softmmu_ss.add(when: 'CONFIG_OT_CSRNG', if_true: [files('ot_csrng.c'), libtomcry
 softmmu_ss.add(when: 'CONFIG_OT_EDN', if_true: files('ot_edn.c'))
 softmmu_ss.add(when: 'CONFIG_OT_ENTROPY_SRC', if_true: [files('ot_entropy_src.c'), libtomcrypt_dep])
 softmmu_ss.add(when: 'CONFIG_OT_FLASH', if_true: files('ot_flash.c'))
+softmmu_ss.add(when: 'CONFIG_OT_GPIO', if_true: files('ot_gpio.c'))
 softmmu_ss.add(when: 'CONFIG_OT_HMAC', if_true: [files('ot_hmac.c'), libtomcrypt_dep])
 softmmu_ss.add(when: 'CONFIG_OT_IBEX_WRAPPER', if_true: files('ot_ibex_wrapper.c'))
 softmmu_ss.add(when: 'CONFIG_OT_KMAC', if_true: [files('ot_kmac.c'), libtomcrypt_dep])