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drivers: entropy_nrf5: Use device name and IRQ priority from DTS

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Instead of using Kconfig options for setting the device name and IRQ
priority for the entropy_nrf5 driver, get these settings from the rng
node defined in DTS for a given SoC.

Provide also fixups for CONFIG_ENTROPY_NAME, until applications using
entropy drivers are converted to use DTS as well.

Signed-off-by: Andrzej Głąbek <andrzej.glabek@nordicsemi.no>
This commit is contained in:
Andrzej Głąbek 2020-04-03 13:48:00 +00:00 • committed by Kumar Gala
commit 97e4c0cbad
6 changed files with 33 additions and 17 deletions
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8
boards/posix/nrf52_bsim/dts_fixup.h Normal file
View file

@ -0,0 +1,8 @@
/* Copyright (c) 2020 Nordic Semiconductor ASA */
/* SPDX-License-Identifier: Apache-2.0 */
/* Board level DTS fixup file */
#ifndef CONFIG_ENTROPY_NAME
#define CONFIG_ENTROPY_NAME DT_LABEL(DT_INST(0, nordic_nrf_rng))
#endif

10
drivers/entropy/Kconfig.nrf5
View file

@ -16,6 +16,7 @@ menuconfig ENTROPY_NRF5_RNG
depends on !ENTROPY_NRF_FORCE_ALT
depends on HAS_HW_NRF_RNG
select ENTROPY_HAS_DRIVER
select HAS_DTS_ENTROPY
default y
help
This option enables the RNG peripheral, which is a random number
@ -67,13 +68,4 @@ config ENTROPY_NRF5_ISR_THRESHOLD
buffer goes below this number hardware entropy generation will be
started.
config ENTROPY_NRF5_PRI
int "RNG interrupt priority"
range 0 2 if SOC_SERIES_NRF51X
range 0 5 if SOC_COMPATIBLE_NRF52X || SOC_SERIES_NRF53X
default 2 if SOC_SERIES_NRF51X
default 5 if SOC_COMPATIBLE_NRF52X || SOC_SERIES_NRF53X
help
nRF5X RNG IRQ priority.
endif # ENTROPY_NRF5_RNG

20
drivers/entropy/entropy_nrf5.c
View file

@ -10,6 +10,11 @@
#include <soc.h>
#include <hal/nrf_rng.h>
#define DT_DRV_COMPAT nordic_nrf_rng
#define IRQN DT_INST_IRQN(0)
#define IRQ_PRIO DT_INST_IRQ(0, priority)
/*
* The nRF5 RNG HW has several characteristics that need to be taken
* into account by the driver to achieve energy efficient generation
@ -266,8 +271,8 @@ static int entropy_nrf5_get_entropy_isr(struct device *dev, u8_t *buf, u16_t len
int irq_enabled;
key = irq_lock();
irq_enabled = irq_is_enabled(RNG_IRQn);
irq_disable(RNG_IRQn);
irq_enabled = irq_is_enabled(IRQN);
irq_disable(IRQN);
irq_unlock(key);
nrf_rng_event_clear(NRF_RNG, NRF_RNG_EVENT_VALRDY);
@ -284,7 +289,7 @@ static int entropy_nrf5_get_entropy_isr(struct device *dev, u8_t *buf, u16_t len
}
byte = random_byte_get();
NVIC_ClearPendingIRQ(RNG_IRQn);
NVIC_ClearPendingIRQ(IRQN);
if (byte < 0) {
continue;
@ -294,7 +299,7 @@ static int entropy_nrf5_get_entropy_isr(struct device *dev, u8_t *buf, u16_t len
} while (len);
if (irq_enabled) {
irq_enable(RNG_IRQn);
irq_enable(IRQN);
}
}
@ -308,7 +313,7 @@ static const struct entropy_driver_api entropy_nrf5_api_funcs = {
.get_entropy_isr = entropy_nrf5_get_entropy_isr
};
DEVICE_AND_API_INIT(entropy_nrf5, CONFIG_ENTROPY_NAME,
DEVICE_AND_API_INIT(entropy_nrf5, DT_INST_LABEL(0),
entropy_nrf5_init, &entropy_nrf5_data, NULL,
PRE_KERNEL_1, CONFIG_KERNEL_INIT_PRIORITY_DEVICE,
&entropy_nrf5_api_funcs);
@ -342,9 +347,8 @@ static int entropy_nrf5_init(struct device *device)
nrf_rng_int_enable(NRF_RNG, NRF_RNG_INT_VALRDY_MASK);
nrf_rng_task_trigger(NRF_RNG, NRF_RNG_TASK_START);
IRQ_CONNECT(RNG_IRQn, CONFIG_ENTROPY_NRF5_PRI, isr,
&entropy_nrf5_data, 0);
irq_enable(RNG_IRQn);
IRQ_CONNECT(IRQN, IRQ_PRIO, isr, &entropy_nrf5_data, 0);
irq_enable(IRQN);
return 0;
}

4
soc/arm/nordic_nrf/nrf51/dts_fixup.h
View file

@ -2,6 +2,10 @@
/* SoC level DTS fixup file */
#ifndef CONFIG_ENTROPY_NAME
#define CONFIG_ENTROPY_NAME DT_LABEL(DT_INST(0, nordic_nrf_rng))
#endif
#define DT_NUM_IRQ_PRIO_BITS DT_ARM_V6M_NVIC_E000E100_ARM_NUM_IRQ_PRIORITY_BITS
#define DT_ADC_0_NAME DT_NORDIC_NRF_ADC_ADC_0_LABEL

4
soc/arm/nordic_nrf/nrf52/dts_fixup.h
View file

@ -2,6 +2,10 @@
/* SoC level DTS fixup file */
#ifndef CONFIG_ENTROPY_NAME
#define CONFIG_ENTROPY_NAME DT_LABEL(DT_INST(0, nordic_nrf_rng))
#endif
#define DT_NUM_IRQ_PRIO_BITS DT_ARM_V7M_NVIC_E000E100_ARM_NUM_IRQ_PRIORITY_BITS
#define DT_ADC_0_NAME DT_NORDIC_NRF_SAADC_ADC_0_LABEL

4
soc/arm/nordic_nrf/nrf53/dts_fixup.h
View file

@ -6,6 +6,10 @@
/* SoC level DTS fixup file */
#ifndef CONFIG_ENTROPY_NAME
#define CONFIG_ENTROPY_NAME DT_LABEL(DT_INST(0, nordic_nrf_rng))
#endif
#define DT_NUM_IRQ_PRIO_BITS \
DT_ARM_V8M_NVIC_E000E100_ARM_NUM_IRQ_PRIORITY_BITS