soc: esp32c6: add Wi-Fi support

Enables Wi-Fi support.

Signed-off-by: Sylvio Alves <sylvio.alves@espressif.com>

boards/espressif/esp32c6_devkitc/doc/index.rst

@@ -111,6 +111,8 @@ Current Zephyr's ESP32-C6-DevKitC board supports the following features:
 +------------+------------+-------------------------------------+
 | USB-CDC    | on-chip    | serial                              |
 +------------+------------+-------------------------------------+
+| Wi-Fi      | on-chip    |                                     |
++------------+------------+-------------------------------------+
 
 System requirements
 *******************

drivers/clock_control/clock_control_esp32.c

@@ -47,6 +47,7 @@
 #include <hal/clk_tree_ll.h>
 #include <hal/usb_serial_jtag_ll.h>
 #include <esp_private/esp_pmu.h>
+#include <esp_private/esp_modem_clock.h>
 #include <ocode_init.h>
 #endif
 
@@ -87,6 +88,20 @@ static bool reset_reason_is_cpu_reset(void)
 #if defined(CONFIG_SOC_SERIES_ESP32C6)
 static void esp32_clock_perip_init(void)
 {
+	soc_rtc_slow_clk_src_t rtc_slow_clk_src = rtc_clk_slow_src_get();
+	modem_clock_lpclk_src_t modem_lpclk_src =
+		(modem_clock_lpclk_src_t)((rtc_slow_clk_src == SOC_RTC_SLOW_CLK_SRC_RC_SLOW)
+						  ? MODEM_CLOCK_LPCLK_SRC_RC_SLOW
+					  : (rtc_slow_clk_src == SOC_RTC_SLOW_CLK_SRC_XTAL32K)
+						  ? MODEM_CLOCK_LPCLK_SRC_XTAL32K
+					  : (rtc_slow_clk_src == SOC_RTC_SLOW_CLK_SRC_RC32K)
+						  ? MODEM_CLOCK_LPCLK_SRC_RC32K
+					  : (rtc_slow_clk_src == SOC_RTC_SLOW_CLK_SRC_OSC_SLOW)
+						  ? MODEM_CLOCK_LPCLK_SRC_EXT32K
+						  : SOC_RTC_SLOW_CLK_SRC_RC_SLOW);
+
+	modem_clock_select_lp_clock_source(PERIPH_WIFI_MODULE, modem_lpclk_src, 0);
+
 	soc_reset_reason_t rst_reason = esp_rom_get_reset_reason(0);
 
 	if ((rst_reason != RESET_REASON_CPU0_MWDT0) && (rst_reason != RESET_REASON_CPU0_MWDT1) &&

dts/riscv/espressif/esp32c6/esp32c6_common.dtsi

@@ -56,6 +56,11 @@
 		status = "okay";
 	};
 
+	wifi: wifi {
+		compatible = "espressif,esp32-wifi";
+		status = "disabled";
+	};
+
 	soc {
 		#address-cells = <1>;
 		#size-cells = <1>;

samples/net/wifi/shell/socs/esp32c6.conf

@@ -0,0 +1,11 @@
+CONFIG_WIFI=y
+
+CONFIG_NETWORKING=y
+CONFIG_NET_L2_ETHERNET=y
+
+CONFIG_NET_IPV6=n
+CONFIG_NET_IPV4=y
+CONFIG_NET_DHCPV4=y
+CONFIG_ESP32_WIFI_STA_AUTO_DHCPV4=y
+
+CONFIG_NET_LOG=y

samples/net/wifi/shell/socs/esp32c6.overlay

@@ -0,0 +1,9 @@
+/*
+ * Copyright (c) 2024 Espressif Systems (Shanghai) Co., Ltd.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+&wifi {
+	status = "okay";
+};

soc/espressif/esp32c6/default.ld

@@ -388,8 +388,9 @@ SECTIONS
     *libzephyr.a:bootloader_random*.*(.literal.bootloader_random_enable .text.bootloader_random_enable)
 
 #if defined(CONFIG_ESP32_WIFI_IRAM_OPT)
-    *libnet80211.a:( .wifi0iram  .wifi0iram.* .wifislpiram .wifislpiram.* .wifiextrairam .wifiextrairam.*)
-    *libpp.a:( .wifi0iram  .wifi0iram.* .wifislpiram .wifislpiram.* .wifiextrairam .wifiextrairam.*)
+    *libnet80211.a:( .wifi0iram  .wifi0iram.* .wifislpiram .wifislpiram.* .wifiextrairam .wifiextrairam.* .wifi_extra_iram.*)
+    *libpp.a:( .wifi0iram  .wifi0iram.* .wifislpiram .wifislpiram.* .wifiextrairam .wifiextrairam.* .wifi_extra_iram.*)
+    *libcoexist.a:(.wifi_slp_iram .wifi_slp_iram.*)
 
     /* [mapping:esp_wifi] */
     *(.literal.wifi_clock_enable_wrapper .text.wifi_clock_enable_wrapper)
@@ -737,8 +738,8 @@ SECTIONS
     __rom_region_start = ABSOLUTE(.);
 
 #if !defined(CONFIG_ESP32_WIFI_IRAM_OPT)
-    *libnet80211.a:( .wifi0iram  .wifi0iram.* .wifislpiram .wifislpiram.* .wifiextrairam .wifiextrairam.*)
-    *libpp.a:( .wifi0iram  .wifi0iram.* .wifislpiram .wifislpiram.* .wifiextrairam .wifiextrairam.*)
+    *libnet80211.a:( .wifi0iram  .wifi0iram.* .wifislpiram .wifislpiram.* .wifiextrairam .wifiextrairam.* .wifi_extra_iram.*)
+    *libpp.a:( .wifi0iram  .wifi0iram.* .wifislpiram .wifislpiram.* .wifiextrairam .wifiextrairam.* .wifi_extra_iram.*)
 #endif /* CONFIG_ESP32_WIFI_IRAM_OPT */
 
 #if !defined(CONFIG_ESP32_WIFI_RX_IRAM_OPT)

west.yml

@@ -157,7 +157,7 @@ manifest:
       groups:
         - hal
     - name: hal_espressif
-      revision: 07ff57e8d197765652b7819b297415d859ed7815
+      revision: 8d7054f34e6d05e2917410ff0630ee88f553521d
       path: modules/hal/espressif
       west-commands: west/west-commands.yml
       groups: