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Thu, 28 May 2026 06:51:54 -0700 (PDT) From: Svyatoslav Ryhel To: Lee Jones , Daniel Thompson , Jingoo Han , Pavel Machek , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Jonathan Cameron , David Lechner , =?UTF-8?q?Nuno=20S=C3=A1?= , Andy Shevchenko , Helge Deller , Svyatoslav Ryhel Cc: Johan Hovold , dri-devel@lists.freedesktop.org, linux-leds@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-iio@vger.kernel.org, linux-fbdev@vger.kernel.org Subject: [PATCH v2 4/6] mfd: lm3533: Set DMA mask Date: Thu, 28 May 2026 16:51:21 +0300 Message-ID: <20260528135123.103745-5-clamor95@gmail.com> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20260528135123.103745-1-clamor95@gmail.com> References: <20260528135123.103745-1-clamor95@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Missing coherent_dma_mask assigning triggers the following warning in dmesg: [ 3.287872] platform lm3533-backlight.0: DMA mask not set Since this warning might be elevated to an error in the future, set coherent_dma_mask to zero because both the core and cells do not utilize DMA. Signed-off-by: Svyatoslav Ryhel --- drivers/mfd/lm3533-core.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/mfd/lm3533-core.c b/drivers/mfd/lm3533-core.c index 519f8c16a3f3..3cfdebf5fb52 100644 --- a/drivers/mfd/lm3533-core.c +++ b/drivers/mfd/lm3533-core.c @@ -526,6 +526,10 @@ static int lm3533_i2c_probe(struct i2c_client *i2c) LM3533_BOOST_FREQ_MAX); lm3533->boost_freq = lm3533->boost_freq / (500 * KILO) - 1; + /* LM3533 and child devices do not use DMA */ + i2c->dev.coherent_dma_mask = 0; + i2c->dev.dma_mask = &i2c->dev.coherent_dma_mask; + return lm3533_device_init(lm3533); } -- 2.51.0