[PATCH v2 3/4] pinctrl: imx: Match the standard SCMI pinctrl device

[Sudeep Holla]

Use the standard "pinctrl" SCMI device name instead of the i.MX-specific
"pinctrl-imx" name. Standard devices no longer have exclusive request
tracking, so the i.MX and generic pinctrl drivers can register for the
same protocol/name pair. Their probe checks select the appropriate
driver for the platform.

This solves the issue that occurs when both "pinmux" and "pinmux-imx"
devices that share the same fwnode as only the first device registered
is assigned as the owner of the fwnode. If this owner device fails to
probe (e.g., its driver is blocklisted or missing), it never reaches
the driver_bound() stage and the system skips cleaning up its supplier
links. Even if a alternative device binds successfully, the system
still looks to the broken original owner. As a result, all dependent
hardware components (I2C, SPI, UART, USB, MMC, PCIe) defer probing
forever, halting the boot process.

Note that the solution doesn't support same fwnode being shared by
multiple devices and associated fw_devlink feature.

Cc: Pengutronix Kernel Team <kernel at pengutronix.de>
Cc: NXP S32 Linux Team <s32 at nxp.com>
Cc: Linus Walleij <linusw at kernel.org>
Reported-by: Peng Fan <peng.fan at nxp.com>
Closes: https://lore.kernel.org/all/20260928-driver-core-v1-1-0846bb8e0f32@nxp.com
Reviewed-by: Peng Fan <peng.fan at nxp.com>
Tested-by: Peng Fan <peng.fan at nxp.com> #i.MX95 EVK
Signed-off-by: Sudeep Holla <sudeep.holla at kernel.org>
---
 drivers/firmware/arm_scmi/bus.c              | 1 -
 drivers/pinctrl/freescale/pinctrl-imx-scmi.c | 2 +-
 2 files changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/firmware/arm_scmi/bus.c b/drivers/firmware/arm_scmi/bus.c
index 230ee9f6f1aa..6be31b5121b3 100644
--- a/drivers/firmware/arm_scmi/bus.c
+++ b/drivers/firmware/arm_scmi/bus.c
@@ -199,7 +199,6 @@ static const struct scmi_device_id scmi_std_id_table[] = {
 	{ SCMI_PROTOCOL_VOLTAGE, "regulator" },
 	{ SCMI_PROTOCOL_POWERCAP, "powercap" },
 	{ SCMI_PROTOCOL_PINCTRL, "pinctrl" },
-	{ SCMI_PROTOCOL_PINCTRL, "pinctrl-imx" },
 	{ },
 };
 
diff --git a/drivers/pinctrl/freescale/pinctrl-imx-scmi.c b/drivers/pinctrl/freescale/pinctrl-imx-scmi.c
index 613552e35070..b259a526ccc1 100644
--- a/drivers/pinctrl/freescale/pinctrl-imx-scmi.c
+++ b/drivers/pinctrl/freescale/pinctrl-imx-scmi.c
@@ -354,7 +354,7 @@ static int scmi_pinctrl_imx_probe(struct scmi_device *sdev)
 }
 
 static const struct scmi_device_id scmi_id_table[] = {
-	{ SCMI_PROTOCOL_PINCTRL, "pinctrl-imx" },
+	{ SCMI_PROTOCOL_PINCTRL, "pinctrl" },
 	{ }
 };
 MODULE_DEVICE_TABLE(scmi, scmi_id_table);

-- 
2.43.0