drivers: entropy: esp32: enable rng driver
for esp32c3 allowing wifi subsystem to use inside its driver. Signed-off-by: Felipe Neves <felipe.neves@espressif.com>
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6 changed files with 34 additions and 8 deletions
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@ -7,6 +7,9 @@ config BOARD
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default "esp32c3"
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depends on BOARD_ESP32C3_DEVKITM
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config ENTROPY_ESP32_RNG
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default y if ENTROPY_GENERATOR
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if BT
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config HEAP_MEM_POOL_SIZE
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@ -16,4 +19,4 @@ choice BT_HCI_BUS_TYPE
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default BT_ESP32
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endchoice
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endif # BT
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endif # BT
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@ -23,3 +23,7 @@
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status = "okay";
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current-speed = <115200>;
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};
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&trng0 {
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status = "okay";
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};
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@ -5,7 +5,7 @@
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config ENTROPY_ESP32_RNG
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bool "ESP32 entropy number generator driver"
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depends on SOC_ESP32
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depends on SOC_ESP32 || SOC_ESP32C3
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select ENTROPY_HAS_DRIVER
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default y
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help
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@ -7,18 +7,20 @@
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#define DT_DRV_COMPAT espressif_esp32_trng
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#include <string.h>
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#include <drivers/entropy.h>
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#include <soc/dport_reg.h>
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#include <hal/cpu_hal.h>
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#include <esp_clk.h>
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#include <soc/rtc.h>
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#include <soc/wdev_reg.h>
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#include <soc/rtc_cntl_reg.h>
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#include <soc/apb_ctrl_reg.h>
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#include <esp_system.h>
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#include <soc.h>
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#include <xtensa/core-macros.h>
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#include <drivers/entropy.h>
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extern int esp_clk_cpu_freq(void);
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extern int esp_clk_apb_freq(void);
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#ifdef CONFIG_SOC_ESP32
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#include <xtensa/core-macros.h>
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#include <soc/dport_reg.h>
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#endif
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static inline uint32_t entropy_esp32_get_u32(void)
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{
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@ -37,9 +39,10 @@ static inline uint32_t entropy_esp32_get_u32(void)
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uint32_t ccount;
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do {
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ccount = XTHAL_GET_CCOUNT();
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ccount = cpu_hal_get_cycle_count();
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} while (ccount - last_ccount < cpu_to_apb_freq_ratio * 16);
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last_ccount = ccount;
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return REG_READ(WDEV_RND_REG);
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}
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@ -8,6 +8,9 @@
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/ {
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#address-cells = <1>;
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#size-cells = <1>;
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chosen {
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zephyr,entropy = &trng0;
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};
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cpus {
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#address-cells = <1>;
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@ -37,6 +40,13 @@
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label = "UART_0";
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status = "disabled";
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};
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trng0: trng@3ff700b0 {
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compatible = "espressif,esp32-trng";
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reg = <0x3FF700B0 0x4>;
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label = "TRNG_0";
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status = "disabled";
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};
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};
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};
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@ -130,6 +130,12 @@ SECTIONS
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*libzephyr.a:log_backend_uart.*(.literal .text .literal.* .text.*)
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*liblib__libc__minimal.a:string.*(.literal .text .literal.* .text.*)
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*libgcov.a:(.literal .text .literal.* .text.*)
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*libnet80211.a:( .wifi0iram .wifi0iram.* .wifislpiram .wifislpiram.*)
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*libpp.a:( .wifi0iram .wifi0iram.* .wifislpiram .wifislpiram.*)
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*libnet80211.a:( .wifirxiram .wifirxiram.* .wifislprxiram .wifislprxiram.*)
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*libpp.a:( .wifirxiram .wifirxiram.* .wifislprxiram .wifislprxiram.*)
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. = ALIGN(4);
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_init_end = ABSOLUTE(.);
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_iram_text_end = ABSOLUTE(.); *(.srodata)
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