Commit 55f2d72c authored by Bartosz Bilas's avatar Bartosz Bilas Committed by Carles Cufi
Browse files

drivers: eth_esp32: allow selecting ref clk source 



In case of boards where REF_CLK signal is not connected
to the GPIO0 by default add the possibility to use
the optional GPIO16/GPIO17 as a REF CLK source.

Signed-off-by: default avatarBartosz Bilas <bartosz.bilas@hotmail.com>
parent 052f0994

drivers/ethernet/eth_esp32.c

+12 −0
Original line number Diff line number Diff line
@@ -17,6 +17,7 @@ 
#include <esp_mac.h>

#include <hal/emac_hal.h>

#include <hal/emac_ll.h>

#include <soc/rtc.h>



#include "eth.h"
@@ -223,8 +224,19 @@ int eth_esp32_initialize(const struct device *dev) 


	if (strcmp(phy_connection_type, "rmii") == 0) {

		emac_hal_iomux_init_rmii();

#if DT_INST_NODE_HAS_PROP(0, ref_clk_output_gpios)

		BUILD_ASSERT(DT_INST_GPIO_PIN(0, ref_clk_output_gpios) == 16 ||

			DT_INST_GPIO_PIN(0, ref_clk_output_gpios) == 17,

			"Only GPIO16/17 are allowed as a GPIO REF_CLK source!");

		int ref_clk_gpio = DT_INST_GPIO_PIN(0, ref_clk_output_gpios);



		emac_hal_iomux_rmii_clk_output(ref_clk_gpio);

		emac_ll_clock_enable_rmii_output(dev_data->hal.ext_regs);

		rtc_clk_apll_enable(true, 0, 0, 6, 2);

#else

		emac_hal_iomux_rmii_clk_input();

		emac_ll_clock_enable_rmii_input(dev_data->hal.ext_regs);

#endif

	} else if (strcmp(phy_connection_type, "mii") == 0) {

		emac_hal_iomux_init_mii();

		emac_ll_clock_enable_mii(dev_data->hal.ext_regs);

dts/bindings/ethernet/espressif,esp32-eth.yaml

+5 −0
Original line number Diff line number Diff line
@@ -14,3 +14,8 @@ properties: 


  phy-connection-type:

    default: "rmii"



  ref-clk-output-gpios:

    type: phandle-array

    description: |

      GPIO to output RMII Clock.

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