drivers: flash: silabs: Add DMA write support (4970e2a1) · Commits · Wenxi XU / zephyr

drivers/flash/Kconfig.silabs

+9 −0

Changes for drivers/flash/Kconfig.silabs: 9 added lines, 0 removed lines.
Original line number	Diff line number	Diff line
		@@ -12,3 +12,12 @@ config SOC_FLASH_SILABS_S2
		select MPU_ALLOW_FLASH_WRITE if ARM_MPU
		help
		Enable Silicon Labs Series 2 internal flash driver.

		if SOC_FLASH_SILABS_S2

		config SOC_FLASH_SILABS_S2_DMA_WRITE
		bool "Use DMA for flash write operations"
		depends on DMA
		default y if $(dt_compat_any_has_prop,$(DT_COMPAT_SILABS_SERIES2_FLASH_CONTROLLER),dmas)

		endif

drivers/flash/soc_flash_silabs_series2.c

+17 −0

Changes for drivers/flash/soc_flash_silabs_series2.c: 17 added lines, 0 removed lines.
Original line number	Diff line number	Diff line
		@@ -14,6 +14,7 @@
		#include <zephyr/kernel.h>
		#include <zephyr/device.h>
		#include <zephyr/drivers/flash.h>
		#include <zephyr/drivers/dma.h>
		#include <soc.h>
		#include <em_msc.h>

		@@ -22,6 +23,10 @@ LOG_MODULE_REGISTER(flash_silabs, CONFIG_FLASH_LOG_LEVEL);

		struct flash_silabs_data {
		struct k_sem lock;
		#ifdef CONFIG_SOC_FLASH_SILABS_S2_DMA_WRITE
		const struct device *dma_dev;
		uint32_t dma_channel;
		#endif
		};

		struct flash_silabs_config {
		@@ -89,7 +94,11 @@ static int flash_silabs_write(const struct device *dev, off_t offset, const void
		flash_silabs_write_protection(false);

		address = (uint8_t *)DT_REG_ADDR(SOC_NV_FLASH_NODE) + offset;
		#ifdef CONFIG_SOC_FLASH_SILABS_S2_DMA_WRITE
		ret = MSC_WriteWordDma(dev_data->dma_channel, address, data, size);
		#else
		ret = MSC_WriteWord(address, data, size);
		#endif
		if (ret < 0) {
		ret = -EIO;
		}
		@@ -188,6 +197,10 @@ static int flash_silabs_init(const struct device *dev)
		/* Lock the MSC module. */
		flash_silabs_write_protection(true);

		#ifdef CONFIG_SOC_FLASH_SILABS_S2_DMA_WRITE
		dev_data->dma_channel = dma_request_channel(dev_data->dma_dev, NULL);
		#endif

		LOG_INF("Device %s initialized", dev->name);

		return 0;
		@@ -207,6 +220,10 @@ static DEVICE_API(flash, flash_silabs_driver_api) = {
		/* clang-format off */
		static struct flash_silabs_data flash_silabs_data_0 = {
		.lock = Z_SEM_INITIALIZER(flash_silabs_data_0.lock, 1, 1),
		#ifdef CONFIG_SOC_FLASH_SILABS_S2_DMA_WRITE
		.dma_dev = DEVICE_DT_GET(DT_INST_DMAS_CTLR(0)),
		.dma_channel = -1,
		#endif
		};

		static const struct flash_silabs_config flash_silabs_config_0 = {

tests/drivers/flash/common/boards/xg24_rb4187c.overlay

0 → 100644

+12 −0

Changes for tests/drivers/flash/common/boards/xg24_rb4187c.overlay: 12 added lines, 0 removed lines.
Original line number	Diff line number	Diff line
		/*
		* Copyright (c) 2025 Silicon Laboratories Inc.
		* SPDX-License-Identifier: Apache-2.0
		*/

		&dma0 {
		status = "okay";
		};

		&msc {
		dmas = <&dma0 DMA_REQSEL_MSCWDATA>;
		};

tests/drivers/flash/common/testcase.yaml

+5 −0

Changes for tests/drivers/flash/common/testcase.yaml: 5 added lines, 0 removed lines.
Original line number	Diff line number	Diff line
		@@ -94,3 +94,8 @@ tests:
		- gd32vf103v_eval
		- gd32a503v_eval
		- gd32f470i_eval
		drivers.flash.common.silabs.dma:
		platform_allow:
		- xg24_rb4187c
		extra_configs:
		- CONFIG_DMA=y

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