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Mon, 29 Jan 2024 04:28:37 -0800 (PST) Received: from 192.168.10.7 ([2409:8a6a:542c:83f1:d1e7:d095:b7df:289d]) by smtp.gmail.com with ESMTPSA id c38-20020a630d26000000b005cfb6b8e471sm5833300pgl.14.2024.01.29.04.28.33 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 29 Jan 2024 04:28:37 -0800 (PST) From: Jianhua Lu To: Jianhua Lu , Lee Jones , Daniel Thompson , Jingoo Han , Helge Deller Cc: dri-devel@lists.freedesktop.org, linux-fbdev@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH] backlight: ktz8866: Correct the check for of_property_read_u32 Date: Mon, 29 Jan 2024 20:28:29 +0800 Message-ID: <20240129122829.16248-1-lujianhua000@gmail.com> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1789427801652946331 X-GMAIL-MSGID: 1789427801652946331 of_property_read_u32 returns 0 when success, so reverse the return value to get the true value. Fixes: f8449c8f7355 ("backlight: ktz8866: Add support for Kinetic KTZ8866 backlight") Signed-off-by: Jianhua Lu Reviewed-by: Daniel Thompson --- drivers/video/backlight/ktz8866.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/video/backlight/ktz8866.c b/drivers/video/backlight/ktz8866.c index 9c980f2571ee..014877b5a984 100644 --- a/drivers/video/backlight/ktz8866.c +++ b/drivers/video/backlight/ktz8866.c @@ -97,20 +97,20 @@ static void ktz8866_init(struct ktz8866 *ktz) { unsigned int val = 0; - if (of_property_read_u32(ktz->client->dev.of_node, "current-num-sinks", &val)) + if (!of_property_read_u32(ktz->client->dev.of_node, "current-num-sinks", &val)) ktz8866_write(ktz, BL_EN, BIT(val) - 1); else /* Enable all 6 current sinks if the number of current sinks isn't specified. */ ktz8866_write(ktz, BL_EN, BIT(6) - 1); - if (of_property_read_u32(ktz->client->dev.of_node, "kinetic,current-ramp-delay-ms", &val)) { + if (!of_property_read_u32(ktz->client->dev.of_node, "kinetic,current-ramp-delay-ms", &val)) { if (val <= 128) ktz8866_write(ktz, BL_CFG2, BIT(7) | (ilog2(val) << 3) | PWM_HYST); else ktz8866_write(ktz, BL_CFG2, BIT(7) | ((5 + val / 64) << 3) | PWM_HYST); } - if (of_property_read_u32(ktz->client->dev.of_node, "kinetic,led-enable-ramp-delay-ms", &val)) { + if (!of_property_read_u32(ktz->client->dev.of_node, "kinetic,led-enable-ramp-delay-ms", &val)) { if (val == 0) ktz8866_write(ktz, BL_DIMMING, 0); else {