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Enable llpm sample for nrf7120 #23179

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fe3b5ad
nrf: subsys: bluetooth: controller: Enable BT_CTLR_SDC_LLPM for nRF7120
rob-robinson-14 Jul 7, 2025
b987a8b
nrf: boards: nordic: nrf7120pdk: Enable prng for zephyr,entropy
rob-robinson-14 Jul 7, 2025
9204e64
samples: bluetooth: llpm: Enable sample to run without security protocol
rob-robinson-14 Jul 7, 2025
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6 changes: 6 additions & 0 deletions boards/nordic/nrf7120pdk/nrf7120pdk_nrf7120_cpuapp.dts
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Expand Up @@ -14,5 +14,11 @@

chosen {
zephyr,sram = &cpuapp_sram;
zephyr,entropy = &prng;
};

prng: prng {
compatible = "nordic,entropy-prng";
status = "okay";
};
};
6 changes: 6 additions & 0 deletions boards/nordic/nrf7120pdk/nrf7120pdk_nrf7120_cpuapp_emu.dts
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Expand Up @@ -17,6 +17,12 @@
zephyr,sram = &cpuapp_sram;
zephyr,console = &uart00;
zephyr,shell-uart = &uart00;
zephyr,entropy = &prng;
};

prng: prng {
compatible = "nordic,entropy-prng";
status = "okay";
};
};

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2 changes: 2 additions & 0 deletions drivers/entropy/Kconfig
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Expand Up @@ -4,6 +4,8 @@
#
# SPDX-License-Identifier: LicenseRef-Nordic-5-Clause

rsource "Kconfig.nrf_prng"

config ENTROPY_CC3XX
bool "Arm CC3XX RNG driver for Nordic devices"
depends on HAS_HW_NRF_CC3XX && !BUILD_WITH_TFM
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20 changes: 20 additions & 0 deletions drivers/entropy/Kconfig.nrf_prng
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@@ -0,0 +1,20 @@
# nRF fake entropy prng generator driver configuration
#
# Copyright (c) 2025 Nordic Semiconductor ASA
#
# SPDX-License-Identifier: LicenseRef-Nordic-5-Clause

if ENTROPY_GENERATOR

config FAKE_ENTROPY_NRF_PRNG
bool "A fake nRF entropy driver"
default y
depends on DT_HAS_NORDIC_ENTROPY_PRNG_ENABLED
depends on (SOC_SERIES_NRF54HX || SOC_SERIES_NRF92X || SOC_SERIES_NRF54LX || SOC_SERIES_NRF71X)
select ENTROPY_HAS_DRIVER
help
This is a super simple PRNG driver that can be used on nRF platforms that
do not have an entropy source.
This is NOT SAFE to use for cryptographic operations!
Comment on lines +7 to +18
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No, this already exists in zephyr and properly emits a warning with:

CONFIG_TEST_RANDOM_GENERATOR=y
CONFIG_TIMER_RANDOM_GENERATOR=y
CONFIG_TEST_CSPRNG_GENERATOR=y


endif
2 changes: 2 additions & 0 deletions samples/bluetooth/llpm/boards/nrf7120pdk_nrf7120_cpuapp.conf
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@@ -0,0 +1,2 @@
# Disabled Bluetooth Security Manager while crypto is not supported
CONFIG_BT_SMP=n
7 changes: 7 additions & 0 deletions samples/bluetooth/llpm/src/main.c
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Expand Up @@ -200,6 +200,13 @@ static void connected(struct bt_conn *conn, uint8_t err)
if (err) {
printk("Failed to set security: %d\n", err);
}
#else
/*Start service discovery*/
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/* Comments start after a space */

err = bt_gatt_dm_start(default_conn, BT_UUID_LATENCY, &discovery_cb,
&latency_client);
if (err) {
printk("Discover failed (err %d)\n", err);
}
#endif /* CONFIG_BT_SMP */
}

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2 changes: 1 addition & 1 deletion subsys/bluetooth/controller/Kconfig
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Expand Up @@ -108,7 +108,7 @@ config BT_CTLR_SDC_LLPM
bool "Enable Low Latency Packet Mode support"
select BT_CONN_PARAM_ANY if !BT_HCI_RAW
depends on (SOC_SERIES_NRF52X || SOC_SERIES_NRF54LX || SOC_SERIES_NRF54HX || \
SOC_SERIES_BSIM_NRF52X || SOC_SERIES_BSIM_NRF54LX)
SOC_SERIES_NRF71X || SOC_SERIES_BSIM_NRF52X || SOC_SERIES_BSIM_NRF54LX)
help
Low Latency Packet Mode (LLPM) is a Nordic proprietary addition
which lets the application use connection intervals down to 1 ms.
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