drivers: flash: Add support Renesas MRAM driver #96715

khoa-nguyen-18 · 2025-09-29T10:55:26Z

Add support Renesas MRAM driver for RA devices
Enable MRAM node on Renesas ek_ra8p1 and mck_ra8t2
Move the MRAM and SRAM resources defination to SoC DTS layer
Add support test app flash/common to test MRAM on ek_ra8p1 and mck_ra8t2
Update SRAM lable for ek_ra8p1 and mck_ra8t2 in samples/subsys/ipc

github-actions · 2025-09-29T10:56:32Z

The following west manifest projects have changed revision in this Pull Request:

Name	Old Revision	New Revision	Diff

✅ All manifest checks OK

Note: This message is automatically posted and updated by the Manifest GitHub Action.

quytranpzz · 2025-09-29T11:02:16Z

drivers/flash/Kconfig.renesas_ra

+	select FLASH_HAS_NO_EXPLICIT_ERASE
+	select USE_RA_FSP_MRAM
+	help
+	  Enable Flash HP driver for RA series


It should be mram?

My mistake, thank you for pointing this out. I've updated it

quytranpzz · 2025-09-29T11:05:29Z

drivers/flash/soc_flash_renesas_ra_mram.c

+
+	if (!size) {
+		return 0;
+	}


Move above line 114, if size = 0, no need to check the others

I've updated it. Thank you

quytranpzz · 2025-09-29T11:06:21Z

drivers/flash/soc_flash_renesas_ra_mram.c

+
+	if (!len) {
+		return 0;
+	}


move above line 67

Updated this also. Thank you

quytranpzz · 2025-09-29T11:06:51Z

drivers/flash/soc_flash_renesas_ra_mram.c

+
+	if (!len) {
+		return 0;
+	}


move above line 89

I've updated it. Thank you

drivers/flash/soc_flash_renesas_ra_mram.c

quytranpzz · 2025-09-29T11:29:58Z

drivers/flash/soc_flash_renesas_ra_mram.c

+
+#define MRAM_RENESAS_RA_INIT(index)                                                                \
+	static struct mram_renesas_ra_data mram_renesas_ra_data_##index = {                        \
+		.area_address = DT_REG_ADDR(index), .area_size = DT_REG_SIZE(index)};              \


Suggested change

.area_address = DT_REG_ADDR(index), .area_size = DT_REG_SIZE(index)}; \

.area_address = DT_REG_ADDR(index), .area_size = DT_REG_SIZE(index),}; \

Just to make it easier to read when running clang-format

Sure, thank you. I've updated

quytranpzz · 2025-09-30T06:12:46Z

drivers/flash/soc_flash_renesas_ra_mram.c

@@ -0,0 +1,232 @@
+/*
+ * Copyright (c) 2024-2025 Renesas Electronics Corporation


Suggested change

* Copyright (c) 2024-2025 Renesas Electronics Corporation

* Copyright (c) 2025 Renesas Electronics Corporation

Thank you, my mistake. I've updated it

quytranpzz · 2025-09-30T06:43:39Z

drivers/flash/soc_flash_renesas_ra_mram.c

+		return -EINVAL;
+	}
+
+	err = R_MRAM_Write(ctrl_data, (uint32_t)data, (uint32_t)(offset + mram_data->area_address),


Since this driver uses FLASH_HAS_NO_EXPLICIT_ERASE, it doesn't require an erase operation before writing data, and data can be overwritten. Should we add mutex here?

Good point. My mistake for not considering this case. I've updated it to add a mutex lock. Thank you

drivers/flash/soc_flash_renesas_ra_mram.c

dts/arm/renesas/ra/ra8/r7ka8p1kflcac.dtsi

dts/arm/renesas/ra/ra8/r7ka8t2lfecac.dtsi

khoa-nguyen-18 · 2025-10-13T02:16:25Z

Rebase to solve the conflicts
Updated based on review feedback

khoa-nguyen-18 · 2025-10-13T03:22:17Z

Since we plan to support MCUBoot on RA8P1 and RA8T2, and it depends on this MRAM PR being merged.
I’d really appreciate it if @de-nordic, @thenguyenyf, and @quytranpzz could help push this PR forward quickly.

quytranpzz · 2025-10-13T05:12:34Z

drivers/flash/soc_flash_renesas_ra_mram.c

+				.erase_value = 0xff,                                               \
+			},                                                                         \


Suggested change

.erase_value = 0xff, \

}, \

.erase_value = 0xff, \

.caps = {

.no_explicit_erase = true,

},

}, \

thank you, I've updated it

Add support Renesas MRAM driver for RA devices Signed-off-by: Khoa Nguyen <[email protected]>

- Add support MRAM node on Renesas SoC dts layer for RA8P1, RA8T2 - Move the MRAM and SRAM resource defination to SoC dts layer Signed-off-by: Khoa Nguyen <[email protected]>

Update zephyr,flash to MRAM label for ek_ra8p1 and mck_ra8t2 Signed-off-by: Khoa Nguyen <[email protected]>

Add support test app `flash/common` to test MRAM on Renesas ek_ra8p1, mck_ra8t2 Signed-off-by: Khoa Nguyen <[email protected]>

Update sram label for Renesas devices Signed-off-by: Khoa Nguyen <[email protected]>

sonarqubecloud · 2025-10-13T10:47:19Z

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

github-actions bot added manifest manifest-hal_renesas DNM (manifest) This PR should not be merged (controlled by action-manifest) labels Sep 29, 2025

zephyrbot added area: Devicetree Bindings area: Boards/SoCs platform: Renesas RA Renesas Electronics Corporation, RA platform: Renesas Renesas area: Flash area: Tests Issues related to a particular existing or missing test labels Sep 29, 2025

zephyrbot requested review from KhiemNguyenT, andrzej-kaczmarek, blauret, de-nordic, duynguyenxa, ioannis-karachalios, nashif, rghaddab, soburi, thaoluonguw, thenguyenyf and ydamigos September 29, 2025 10:57

zephyrbot assigned de-nordic Sep 29, 2025

khoa-nguyen-18 force-pushed the support_renesas_ra_mram branch from 01fc044 to d7590f5 Compare September 29, 2025 10:59

quytranpzz reviewed Sep 29, 2025

View reviewed changes

khoa-nguyen-18 force-pushed the support_renesas_ra_mram branch from d7590f5 to bffea20 Compare September 30, 2025 02:55

zephyrbot added area: Open AMP area: Samples Samples area: IPC Inter-Process Communication labels Sep 30, 2025

zephyrbot requested a review from doki-nordic September 30, 2025 02:57

quytranpzz reviewed Sep 30, 2025

View reviewed changes

khoa-nguyen-18 force-pushed the support_renesas_ra_mram branch from bffea20 to 7695d77 Compare October 3, 2025 09:29

github-actions bot removed the DNM (manifest) This PR should not be merged (controlled by action-manifest) label Oct 3, 2025

zephyrbot requested review from iuliana-prodan and kartben October 3, 2025 09:31

khoa-nguyen-18 requested a review from quytranpzz October 3, 2025 09:39

khoa-nguyen-18 added this to the v4.3.0 milestone Oct 7, 2025

thenguyenyf reviewed Oct 7, 2025

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khoa-nguyen-18 force-pushed the support_renesas_ra_mram branch from 7695d77 to 74badae Compare October 13, 2025 02:10

github-actions bot removed manifest manifest-hal_renesas labels Oct 13, 2025

khoa-nguyen-18 force-pushed the support_renesas_ra_mram branch from 74badae to c6ed31b Compare October 13, 2025 02:21

khoa-nguyen-18 requested a review from thenguyenyf October 13, 2025 02:47

quytranpzz reviewed Oct 13, 2025

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khoa-nguyen-18 force-pushed the support_renesas_ra_mram branch from c6ed31b to bbfe396 Compare October 13, 2025 10:19

khoa-nguyen-18 added 5 commits October 13, 2025 17:20

drivers: flash: Add support Renesas MRAM driver

605cda1

Add support Renesas MRAM driver for RA devices Signed-off-by: Khoa Nguyen <[email protected]>

dts: arm: renesas: ra: Add support MRAM node on SoC dts layer

c087e33

- Add support MRAM node on Renesas SoC dts layer for RA8P1, RA8T2 - Move the MRAM and SRAM resource defination to SoC dts layer Signed-off-by: Khoa Nguyen <[email protected]>

boards: renesas: Update zephyr,flash to MRAM label

82ef37a

Update zephyr,flash to MRAM label for ek_ra8p1 and mck_ra8t2 Signed-off-by: Khoa Nguyen <[email protected]>

tests: drivers: flash: Add support flash/common to test MRAM

79ceb8b

Add support test app `flash/common` to test MRAM on Renesas ek_ra8p1, mck_ra8t2 Signed-off-by: Khoa Nguyen <[email protected]>

samples: subsys: ipc: Update sram label for Renesas devices

8df36ad

Update sram label for Renesas devices Signed-off-by: Khoa Nguyen <[email protected]>

khoa-nguyen-18 force-pushed the support_renesas_ra_mram branch from bbfe396 to 8df36ad Compare October 13, 2025 10:20

khoa-nguyen-18 requested a review from quytranpzz October 13, 2025 10:21

	.area_address = DT_REG_ADDR(index), .area_size = DT_REG_SIZE(index)}; \
	.area_address = DT_REG_ADDR(index), .area_size = DT_REG_SIZE(index),}; \

		@@ -0,0 +1,232 @@
		/*
		* Copyright (c) 2024-2025 Renesas Electronics Corporation

	* Copyright (c) 2024-2025 Renesas Electronics Corporation
	* Copyright (c) 2025 Renesas Electronics Corporation

drivers: flash: Add support Renesas MRAM driver #96715

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drivers: flash: Add support Renesas MRAM driver #96715

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