linux-kernel - [PATCH 01/12] i2c: add i2c_adapter-specific printk helpers

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Message-Id: <20251223-i2c-printk-helpers-v1-1-46a08306afdb@oss.qualcomm.com>
Date: Tue, 23 Dec 2025 11:02:23 +0100
From: Bartosz Golaszewski <bartosz.golaszewski@....qualcomm.com>
To: Wolfram Sang <wsa+renesas@...g-engineering.com>,
        Andi Shyti <andi.shyti@...nel.org>, Chen-Yu Tsai <wens@...nel.org>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        Samuel Holland <samuel@...lland.org>,
        Khalil Blaiech <kblaiech@...dia.com>, Asmaa Mnebhi <asmaa@...dia.com>,
        Jean Delvare <jdelvare@...e.com>,
        Madhavan Srinivasan <maddy@...ux.ibm.com>,
        Michael Ellerman <mpe@...erman.id.au>,
        Nicholas Piggin <npiggin@...il.com>,
        "Christophe Leroy (CS GROUP)" <chleroy@...nel.org>,
        Andreas Färber <afaerber@...e.de>,
        Manivannan Sadhasivam <mani@...nel.org>
Cc: linux-i2c@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-sunxi@...ts.linux.dev,
        linuxppc-dev@...ts.ozlabs.org, linux-actions@...ts.infradead.org,
        Bartosz Golaszewski <brgl@...nel.org>,
        Bartosz Golaszewski <bartosz.golaszewski@....qualcomm.com>
Subject: [PATCH 01/12] i2c: add i2c_adapter-specific printk helpers

Add a set of i2c-specific printk helpers that wrap their device-level
counterparts and hide the dereferencing of struct device embedded in
struct i2c_adapter. This is done in order to allow moving this struct
device out of struct i2c_adapter into memory managed by i2c core.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@....qualcomm.com>
---
 include/linux/i2c.h | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/include/linux/i2c.h b/include/linux/i2c.h
index 20fd41b51d5c85ee1665395c07345faafd8e2fca..2225696c859f617479be4d5c9d304bb32cbf5e9d 100644
--- a/include/linux/i2c.h
+++ b/include/linux/i2c.h
@@ -768,6 +768,12 @@ struct i2c_adapter {
 };
 #define to_i2c_adapter(d) container_of(d, struct i2c_adapter, dev)
 
+#define i2c_err(adap, fmt, ...) dev_err(&(adap)->dev, fmt, ##__VA_ARGS__)
+#define i2c_warn(adap, fmt, ...) dev_warn(&(adap)->dev, fmt, ##__VA_ARGS__)
+#define i2c_notice(adap, fmt, ...) dev_notice(&(adap)->dev, fmt, ##__VA_ARGS__)
+#define i2c_info(adap, fmt, ...) dev_info(&(adap)->dev, fmt, ##__VA_ARGS__)
+#define i2c_dbg(adap, fmt, ...) dev_dbg(&(adap)->dev, fmt, ##__VA_ARGS__)
+
 static inline void *i2c_get_adapdata(const struct i2c_adapter *adap)
 {
 	return dev_get_drvdata(&adap->dev);

-- 
2.47.3