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drivers: entropy: esp32c6: Add support

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Add support of entropy (TRNG) driver for ESP32C6

Signed-off-by: Raffael Rostagno <raffael.rostagno@espressif.com>
This commit is contained in:
Raffael Rostagno 2024-08-20 16:18:26 -03:00 committed by Carles Cufí
parent 4c151ab67c
commit b4148f17b7
2 changed files with 35 additions and 1 deletions
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28
drivers/entropy/entropy_esp32.c
View file

@ -12,7 +12,13 @@
#include <esp_system.h>
#include <soc.h>
#include <esp_cpu.h>
#include <zephyr/logging/log.h>
#include <zephyr/drivers/entropy.h>
#if defined(SOC_RNG_CLOCK_IS_INDEPENDENT)
#include <zephyr/drivers/clock_control.h>
#endif
LOG_MODULE_REGISTER(entropy, CONFIG_ENTROPY_LOG_LEVEL);
static inline uint32_t entropy_esp32_get_u32(void)
{
@ -58,8 +64,28 @@ static int entropy_esp32_get_entropy(const struct device *dev, uint8_t *buf,
static int entropy_esp32_init(const struct device *dev)
{
int ret = 0;
#if defined(SOC_RNG_CLOCK_IS_INDEPENDENT)
const struct device *clock_dev =
DEVICE_DT_GET(DT_CLOCKS_CTLR(DT_NODELABEL(trng0)));
clock_control_subsys_t clock_subsys =
(clock_control_subsys_t)DT_CLOCKS_CELL(DT_NODELABEL(trng0), offset);
if (!device_is_ready(clock_dev)) {
return -ENODEV;
}
ret = clock_control_on(clock_dev, clock_subsys);
if (ret != 0) {
LOG_ERR("Error enabling TRNG clock");
}
#else
/* clock initialization handled by clock manager */
return 0;
#endif
return ret;
}
static const struct entropy_driver_api entropy_esp32_api_funcs = {

8
dts/riscv/espressif/esp32c6/esp32c6_common.dtsi
View file

@ -15,6 +15,7 @@
#size-cells = <1>;
chosen {
zephyr,entropy = &trng0;
zephyr,flash-controller = &flash;
};
@ -101,6 +102,13 @@
status = "disabled";
};
trng0: trng@600b2808 {
compatible = "espressif,esp32-trng";
reg = <0x600B2808 0x4>;
clocks = <&rtc ESP32_RNG_MODULE>;
status = "disabled";
};
spi2: spi@60081000 {
compatible = "espressif,esp32-spi";
reg = <0x60081000 DT_SIZE_K(4)>;