[PATCH] pinctrl: denverton: Fix probe of MFD-created platform device

[Radek Válko]

The Denverton pinctrl device can be instantiated by the Intel LPC
driver as an MFD platform device named "denverton-pinctrl".

On affected systems the platform device does not carry the INTC3000
ACPI match data itself. As a result, intel_pinctrl_probe_by_hid()
fails to obtain the SoC data using device_get_match_data() and
returns -ENODATA.

This results in:

  denverton-pinctrl denverton-pinctrl.0:
  probe with driver denverton-pinctrl failed with error -61

Denverton has a single fixed intel_pinctrl_soc_data instance. Pass
dnv_soc_data directly to intel_pinctrl_probe() instead of requiring
firmware match data for the MFD-created platform device.

Tested on an Intel Atom C3000 system with LPC/eSPI device 8086:19dc.
Before this change the Denverton pinctrl driver failed to probe and
no Denverton GPIO controller was registered. After the change,
denverton-pinctrl.0 registers with pinmux and pinconf support and
exposes 154 GPIO lines.

Signed-off-by: Radek Válko <rvalko@xxxxxxxxxx>
---
 drivers/pinctrl/intel/pinctrl-denverton.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/pinctrl/intel/pinctrl-denverton.c b/drivers/pinctrl/intel/pinctrl-denverton.c
--- a/drivers/pinctrl/intel/pinctrl-denverton.c
+++ b/drivers/pinctrl/intel/pinctrl-denverton.c
@@ -250,6 +250,11 @@ static const struct intel_pinctrl_soc_data dnv_soc_data = {
 	.ncommunities = ARRAY_SIZE(dnv_communities),
 };
 
+static int dnv_pinctrl_probe(struct platform_device *pdev)
+{
+	return intel_pinctrl_probe(pdev, &dnv_soc_data);
+}
+
 static const struct acpi_device_id dnv_pinctrl_acpi_match[] = {
 	{ "INTC3000", (kernel_ulong_t)&dnv_soc_data },
 	{ }
@@ -263,7 +268,7 @@ static const struct platform_device_id dnv_pinctrl_platform_ids[] = {
 MODULE_DEVICE_TABLE(platform, dnv_pinctrl_platform_ids);
 
 static struct platform_driver dnv_pinctrl_driver = {
-	.probe = intel_pinctrl_probe_by_hid,
+	.probe = dnv_pinctrl_probe,
 	.driver = {
 		.name = "denverton-pinctrl",
 		.acpi_match_table = dnv_pinctrl_acpi_match,
-- 
2.47.0