linux-kernel - [PATCH v3 3/3] mtd: mchp48l640: add support for Fujitsu MB85RS128TY FRAM

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Message-Id: <20241203-mb85rs128ty-v3-3-79107d54d839@pengutronix.de>
Date: Tue, 03 Dec 2024 11:38:37 +0100
From: Jonas Rebmann <jre@...gutronix.de>
To: Miquel Raynal <miquel.raynal@...tlin.com>, 
 Richard Weinberger <richard@....at>, Vignesh Raghavendra <vigneshr@...com>, 
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Heiko Schocher <hs@...x.de>
Cc: linux-mtd@...ts.infradead.org, linux-kernel@...r.kernel.org, 
 devicetree@...r.kernel.org, David Jander <david@...tonic.nl>, 
 kernel@...gutronix.de, Jonas Rebmann <jre@...gutronix.de>
Subject: [PATCH v3 3/3] mtd: mchp48l640: add support for Fujitsu
 MB85RS128TY FRAM

From: David Jander <david@...tonic.nl>

The Fujitsu FRAM chips use the same command set as Microchip EERAM.
The only differences are that the Fujitsu FRAM chips don't really have a
page size limit, nor do they automatically reset the WEL bit.

Signed-off-by: David Jander <david@...tonic.nl>
Reviewed-by: Heiko Schocher <hs@...x.de>
Signed-off-by: Jonas Rebmann <jre@...gutronix.de>
---
 drivers/mtd/devices/mchp48l640.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/drivers/mtd/devices/mchp48l640.c b/drivers/mtd/devices/mchp48l640.c
index 4cdd24aaed416fc7e40a8060b5c7eaf6684fc6d5..7584d0ba93969d79ba3d9c7a97bc63bd0e5ef327 100644
--- a/drivers/mtd/devices/mchp48l640.c
+++ b/drivers/mtd/devices/mchp48l640.c
@@ -303,6 +303,12 @@ static const struct mchp48_caps mchp48l640_caps = {
 	.auto_disable_wel = true,
 };
 
+static const struct mchp48_caps mb85rs128ty_caps = {
+	.size = SZ_16K,
+	.page_size = 256,
+	.auto_disable_wel = false,
+};
+
 static int mchp48l640_probe(struct spi_device *spi)
 {
 	struct mchp48l640_flash *flash;
@@ -361,6 +367,10 @@ static const struct of_device_id mchp48l640_of_table[] = {
 		.compatible = "microchip,48l640",
 		.data = &mchp48l640_caps,
 	},
+	{
+		.compatible = "fujitsu,mb85rs128ty",
+		.data = &mb85rs128ty_caps,
+	},
 	{}
 };
 MODULE_DEVICE_TABLE(of, mchp48l640_of_table);
@@ -370,6 +380,10 @@ static const struct spi_device_id mchp48l640_spi_ids[] = {
 		.name = "48l640",
 		.driver_data = (kernel_ulong_t)&mchp48l640_caps,
 	},
+	{
+		.name = "mb85rs128ty",
+		.driver_data = (kernel_ulong_t)&mb85rs128ty_caps,
+	},
 	{}
 };
 MODULE_DEVICE_TABLE(spi, mchp48l640_spi_ids);

-- 
2.39.5