linux-kernel - [PATCH v4 1/3] eeprom: at24: Add support for Microchip 24AA025E48/24AA025E64 EEPROMs

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Message-ID: <20240703084704.197697-2-andrei.simion@microchip.com>
Date: Wed, 3 Jul 2024 11:47:02 +0300
From: Andrei Simion <andrei.simion@...rochip.com>
To: <brgl@...ev.pl>, <robh@...nel.org>, <krzk+dt@...nel.org>,
	<conor+dt@...nel.org>, <nicolas.ferre@...rochip.com>,
	<alexandre.belloni@...tlin.com>, <claudiu.beznea@...on.dev>, <arnd@...db.de>,
	<gregkh@...uxfoundation.org>
CC: <linux-i2c@...r.kernel.org>, <devicetree@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, <linux-arm-kernel@...ts.infradead.org>,
	Claudiu Beznea <claudiu.beznea@...rochip.com>, Andrei Simion
	<andrei.simion@...rochip.com>
Subject: [PATCH v4 1/3] eeprom: at24: Add support for Microchip 24AA025E48/24AA025E64 EEPROMs

From: Claudiu Beznea <claudiu.beznea@...rochip.com>

Add "microchip,24aa025e48", "microchip,24aa025e64" compatible for the
usage w/ 24AA025E{48, 64} type of EEPROMs where "24aa025e48" stands
for EUI-48 address and "24aa025e64" stands for EUI-64 address.

Signed-off-by: Claudiu Beznea <claudiu.beznea@...rochip.com>
[andrei.simion@...rochip.com: Use AT24_DATA_CHIP with AT24_FLAG_READONLY for
24AA025E{48, 64} type of EEPROMs. Reword commit message.]
Signed-off-by: Andrei Simion <andrei.simion@...rochip.com>
---
v3 -> v4:
- Use AT24_CHIP_DATA with AT24_FLAG_READONLY
- drop AT24_CHIP_DATA_CB_AO
- drop AT24_CHIP_DATA_AO
- drop u8 adjoff
- change the commit title

v2 -> v3:
- add specific compatible name according with
https://ww1.microchip.com/downloads/en/DeviceDoc/24AA02E48-24AA025E48-24AA02E64-24AA025E64-Data-Sheet-20002124H.pdf
- add extended macros to init structure with explicit value for adjoff
- drop co-developed-by to maintain the commit history
 (chronological order of modifications)

v1 -> v2:
- no change
---
 drivers/misc/eeprom/at24.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/misc/eeprom/at24.c b/drivers/misc/eeprom/at24.c
index 4bd4f32bcdab..ca872e3465ed 100644
--- a/drivers/misc/eeprom/at24.c
+++ b/drivers/misc/eeprom/at24.c
@@ -174,6 +174,10 @@ AT24_CHIP_DATA(at24_data_24mac402, 48 / 8,
 	AT24_FLAG_MAC | AT24_FLAG_READONLY);
 AT24_CHIP_DATA(at24_data_24mac602, 64 / 8,
 	AT24_FLAG_MAC | AT24_FLAG_READONLY);
+AT24_CHIP_DATA(at24_data_24aa025e48, 48 / 8,
+	AT24_FLAG_READONLY);
+AT24_CHIP_DATA(at24_data_24aa025e64, 64 / 8,
+	AT24_FLAG_READONLY);
 /* spd is a 24c02 in memory DIMMs */
 AT24_CHIP_DATA(at24_data_spd, 2048 / 8,
 	AT24_FLAG_READONLY | AT24_FLAG_IRUGO);
@@ -218,6 +222,8 @@ static const struct i2c_device_id at24_ids[] = {
 	{ "24cs02",	(kernel_ulong_t)&at24_data_24cs02 },
 	{ "24mac402",	(kernel_ulong_t)&at24_data_24mac402 },
 	{ "24mac602",	(kernel_ulong_t)&at24_data_24mac602 },
+	{ "24aa025e48",	(kernel_ulong_t)&at24_data_24aa025e48 },
+	{ "24aa025e64",	(kernel_ulong_t)&at24_data_24aa025e64 },
 	{ "spd",	(kernel_ulong_t)&at24_data_spd },
 	{ "24c02-vaio",	(kernel_ulong_t)&at24_data_24c02_vaio },
 	{ "24c04",	(kernel_ulong_t)&at24_data_24c04 },
@@ -270,6 +276,8 @@ static const struct of_device_id __maybe_unused at24_of_match[] = {
 	{ .compatible = "atmel,24c1024",	.data = &at24_data_24c1024 },
 	{ .compatible = "atmel,24c1025",	.data = &at24_data_24c1025 },
 	{ .compatible = "atmel,24c2048",	.data = &at24_data_24c2048 },
+	{ .compatible = "microchip,24aa025e48",	.data = &at24_data_24aa025e48 },
+	{ .compatible = "microchip,24aa025e64",	.data = &at24_data_24aa025e64 },
 	{ /* END OF LIST */ },
 };
 MODULE_DEVICE_TABLE(of, at24_of_match);
-- 
2.34.1