[mynewt-core] 01/03: mcu/nrf5340/tfm: Add FICR XOSC32TRIM read function

[ja...@apache.org]

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janc pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/mynewt-core.git

commit a11c5b15234cd0d3454500351a61f46cf4c5c0cf
Author: Szymon Janc <sz...@codecoup.pl>
AuthorDate: Wed Jun 7 15:43:47 2023 +0200

    mcu/nrf5340/tfm: Add FICR XOSC32TRIM read function
    
    New NSC function tfm_ficr_xosc32mtrim_read reads XOSC32TRIM from
    FICR register.
---
 hw/mcu/nordic/nrf5340/tfm/include/tfm/tfm.h | 9 +++++++++
 hw/mcu/nordic/nrf5340/tfm/pkg.yml           | 1 +
 hw/mcu/nordic/nrf5340/tfm/src/tfm.c         | 8 ++++++++
 3 files changed, 18 insertions(+)

diff --git a/hw/mcu/nordic/nrf5340/tfm/include/tfm/tfm.h b/hw/mcu/nordic/nrf5340/tfm/include/tfm/tfm.h
index 843eee154..5e50d0c57 100644
--- a/hw/mcu/nordic/nrf5340/tfm/include/tfm/tfm.h
+++ b/hw/mcu/nordic/nrf5340/tfm/include/tfm/tfm.h
@@ -78,3 +78,12 @@ int SECURE_CALL tfm_gpio_pin_mcu_select(uint32_t pin_number, nrf_gpio_pin_mcusel
  * @return 0 on success
  */
 int SECURE_CALL tfm_uicr_protect_device(uint8_t *approtect, uint8_t *secure_approtect, uint8_t *erase_protect);
+
+/**
+ * Read FICR XOSC32TRIM word
+ *
+ * @param xosc32mtrim - buffer for xosc32mtrim value
+ * @return 0 on success
+ *         TFM_ERR_ACCESS_DENIED - when read is denied by secure code
+ */
+int SECURE_CALL tfm_ficr_xosc32mtrim_read(uint32_t *xosc32mtrim);
diff --git a/hw/mcu/nordic/nrf5340/tfm/pkg.yml b/hw/mcu/nordic/nrf5340/tfm/pkg.yml
index 37d3c9756..bfd8e11e0 100644
--- a/hw/mcu/nordic/nrf5340/tfm/pkg.yml
+++ b/hw/mcu/nordic/nrf5340/tfm/pkg.yml
@@ -37,3 +37,4 @@ pkg.lflags.(MCU_APP_SECURE && TFM_EXPORT_NSC):
     - -utfm_uicr_otp_write
     - -utfm_gpio_pin_mcu_select
     - -utfm_uicr_protect_device
+    - -utfm_ficr_xosc32mtrim_read
diff --git a/hw/mcu/nordic/nrf5340/tfm/src/tfm.c b/hw/mcu/nordic/nrf5340/tfm/src/tfm.c
index f698ba020..22573db65 100644
--- a/hw/mcu/nordic/nrf5340/tfm/src/tfm.c
+++ b/hw/mcu/nordic/nrf5340/tfm/src/tfm.c
@@ -102,3 +102,11 @@ tfm_gpio_pin_mcu_select(uint32_t pin_number, nrf_gpio_pin_mcusel_t mcu_sel)
 
     return err;
 }
+
+int SECURE_CALL
+tfm_ficr_xosc32mtrim_read(uint32_t *xosc32mtrim)
+{
+    *xosc32mtrim = NRF_FICR_S->XOSC32MTRIM;
+
+    return 0;
+}