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Sun, 02 Nov 2025 03:59:26 -0800 (PST) Received: from localhost ([196.207.164.177]) by smtp.gmail.com with UTF8SMTPSA id ffacd0b85a97d-429c1406a45sm13910629f8f.47.2025.11.02.03.59.25 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 02 Nov 2025 03:59:25 -0800 (PST) Date: Sun, 2 Nov 2025 14:59:22 +0300 From: Dan Carpenter To: Lee Jones Cc: Arnd Bergmann , linux-kernel@vger.kernel.org, kernel-janitors@vger.kernel.org, Chen-Yu Tsai , Rob Herring , Peter Griffin , linaro-s32@linaro.org, NXP S32 Linux Team Subject: [PATCH v2] mfd: syscon: return -EPROBE_DEFER if the syscon is not found Message-ID: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Disposition: inline X-Mailer: git-send-email haha only kidding Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" These days we can register syscons with of_syscon_register_regmap() so when we can't find the syscon that probably means it hasn't been registered yet. Return -EPROBE_DEFER so the driver will try probing again. Signed-off-by: Dan Carpenter Reviewed-by: Arnd Bergmann Reviewed-by: Chen-Yu Tsai Acked-by: Rob Herring (Arm) --- v2: In v1, I added a property to the syscon yaml file, but those changes were not welcomed or required. The "syscon" compatible means "have Linux create a regmap for me" and my property meant the opposite so it was kind of pointless. So don't do that. Link to v1. https://lore.kernel.org/all/cover.1761753288.git.dan.carpenter@linaro.o= rg/ drivers/mfd/syscon.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/mfd/syscon.c b/drivers/mfd/syscon.c index ae71a2710bed..e5d5def594f6 100644 --- a/drivers/mfd/syscon.c +++ b/drivers/mfd/syscon.c @@ -183,7 +183,7 @@ static struct regmap *device_node_get_regmap(struct dev= ice_node *np, if (create_regmap) syscon =3D of_syscon_register(np, check_res); else - syscon =3D ERR_PTR(-EINVAL); + syscon =3D ERR_PTR(-EPROBE_DEFER); } mutex_unlock(&syscon_list_lock); =20 --=20 2.51.0