[PATCH v6 9/9] ACPI / scan: Create platform device for CS35L41

[Stefan Binding]

From: Lucas Tanure <tanureal at opensource.cirrus.com>

The ACPI device with CSC3551 or CLSA0100 are sound cards
with multiple instances of CS35L41 connected by I2C or SPI
to the main CPU.

We add an ID to the ignore_serial_bus_ids list to enumerate
all I2C or SPI devices correctly.

The same IDs are also added into serial-multi-instantiate
so that the driver can correctly enumerate the ACPI.

Signed-off-by: Lucas Tanure <tanureal at opensource.cirrus.com>
Signed-off-by: Stefan Binding <sbinding at opensource.cirrus.com>
---
 drivers/acpi/scan.c                             |  3 +++
 drivers/platform/x86/serial-multi-instantiate.c | 14 ++++++++++++++
 2 files changed, 17 insertions(+)

diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index 48db5e80c2dc..ebd10af3ff7f 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -1744,8 +1744,11 @@ static bool acpi_device_enumeration_by_parent(struct acpi_device *device)
 	 */
 		{"BSG1160", },
 		{"BSG2150", },
+		{"CSC3551", },
 		{"INT33FE", },
 		{"INT3515", },
+	/* Non-conforming _HID for Cirrus Logic already released */
+		{"CLSA0100", },
 	/*
 	 * HIDs of device with an UartSerialBusV2 resource for which userspace
 	 * expects a regular tty cdev to be created (instead of the in kernel
diff --git a/drivers/platform/x86/serial-multi-instantiate.c b/drivers/platform/x86/serial-multi-instantiate.c
index 3f05385ca2cf..d09f11eac4f8 100644
--- a/drivers/platform/x86/serial-multi-instantiate.c
+++ b/drivers/platform/x86/serial-multi-instantiate.c
@@ -308,6 +308,17 @@ static const struct smi_node int3515_data = {
 	.bus_type = SMI_I2C,
 };
 
+static const struct smi_node cs35l41_hda = {
+	.instances = {
+		{ "cs35l41-hda", IRQ_RESOURCE_GPIO, 0 },
+		{ "cs35l41-hda", IRQ_RESOURCE_GPIO, 0 },
+		{ "cs35l41-hda", IRQ_RESOURCE_GPIO, 0 },
+		{ "cs35l41-hda", IRQ_RESOURCE_GPIO, 0 },
+		{}
+	},
+	.bus_type = SMI_AUTO_DETECT,
+};
+
 /*
  * Note new device-ids must also be added to serial_multi_instantiate_ids in
  * drivers/acpi/scan.c: acpi_device_enumeration_by_parent().
@@ -316,6 +327,9 @@ static const struct acpi_device_id smi_acpi_ids[] = {
 	{ "BSG1160", (unsigned long)&bsg1160_data },
 	{ "BSG2150", (unsigned long)&bsg2150_data },
 	{ "INT3515", (unsigned long)&int3515_data },
+	{ "CSC3551", (unsigned long)&cs35l41_hda },
+	/* Non-conforming _HID for Cirrus Logic already released */
+	{ "CLSA0100", (unsigned long)&cs35l41_hda },
 	{ }
 };
 MODULE_DEVICE_TABLE(acpi, smi_acpi_ids);
-- 
2.25.1