linux-kernel - [PATCH 4/4] mfd: tqmx86: add detection for secondary I2C controller

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Message-ID: <7975988b26074b9417db3009e70de97bc0a24ab6.1760525985.git.matthias.schiffer@ew.tq-group.com>
Date: Wed, 15 Oct 2025 13:03:09 +0200
From: Matthias Schiffer <matthias.schiffer@...tq-group.com>
To: Andi Shyti <andi.shyti@...nel.org>
Cc: linux-i2c@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux@...tq-group.com,
	Matthias Schiffer <matthias.schiffer@...tq-group.com>
Subject: [PATCH 4/4] mfd: tqmx86: add detection for secondary I2C controller

Many TQMx86 PLDs contain 2 I2C controllers. Add support for the second
one.

Signed-off-by: Matthias Schiffer <matthias.schiffer@...tq-group.com>
---
 drivers/mfd/tqmx86.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/drivers/mfd/tqmx86.c b/drivers/mfd/tqmx86.c
index 6447406f5026f..a6f0a185904e9 100644
--- a/drivers/mfd/tqmx86.c
+++ b/drivers/mfd/tqmx86.c
@@ -20,6 +20,7 @@
 #define TQMX86_IOBASE	0x180
 #define TQMX86_IOSIZE	0x20
 #define TQMX86_IOBASE_I2C1	0x1a0
+#define TQMX86_IOBASE_I2C2	0x1aa
 #define TQMX86_IOSIZE_I2C	0xa
 #define TQMX86_IOBASE_WATCHDOG	0x18b
 #define TQMX86_IOSIZE_WATCHDOG	0x2
@@ -52,6 +53,7 @@
 #define TQMX86_REG_IO_EXT_INT_12		3
 #define TQMX86_REG_IO_EXT_INT_MASK		0x3
 #define TQMX86_REG_IO_EXT_INT_I2C1_SHIFT	0
+#define TQMX86_REG_IO_EXT_INT_I2C2_SHIFT	2
 #define TQMX86_REG_IO_EXT_INT_GPIO_SHIFT	4
 #define TQMX86_REG_SAUC		0x17
 
@@ -68,6 +70,10 @@ static uint i2c1_irq;
 module_param(i2c1_irq, uint, 0);
 MODULE_PARM_DESC(i2c1_irq, "I2C1 IRQ number (valid parameters: 7, 9, 12)");
 
+static uint i2c2_irq;
+module_param(i2c2_irq, uint, 0);
+MODULE_PARM_DESC(i2c2_irq, "I2C2 IRQ number (valid parameters: 7, 9, 12)");
+
 static const struct resource tqmx_watchdog_resources[] = {
 	DEFINE_RES_IO(TQMX86_IOBASE_WATCHDOG, TQMX86_IOSIZE_WATCHDOG),
 };
@@ -338,6 +344,11 @@ static int tqmx86_probe(struct platform_device *pdev)
 	if (err)
 		return err;
 
+	err = tqmx86_detect_i2c(dev, "I2C2", TQMX86_IOBASE_I2C2, clock_khz, i2c2_irq,
+				NULL, 0, io_base, TQMX86_REG_IO_EXT_INT_I2C2_SHIFT);
+	if (err)
+		return err;
+
 	return devm_mfd_add_devices(dev, PLATFORM_DEVID_NONE,
 				    tqmx86_devs,
 				    ARRAY_SIZE(tqmx86_devs),
-- 
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