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ig4: Add support for Lunar Lake-M I2C

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this patch adds PCI IDs to the ig4(4) driver:
- Lunar Lake-M (0xa878, 0xa879, 0xa87a, 0xa87b)
These controllers use the Tiger Lake hardware revision of the I2C IP.
Adding these IDs enables support for peripherals connected to the I2C Bus.
Tested on: Intel Lunar Lake (LENOVO_MT_21QX_BU_Think_FM_ThinkPad T14s Gen 6)

Signed-off-by: Defenso-EBO <etienne.bonnand@defenso.fr>

MFC after: 2 weeks

Sponsored by: Defenso

Reviewed by: imp
Pull Request: https://github.com/freebsd/freebsd-src/pull/1995
This commit is contained in:
Defenso-EBO
2026-01-29 10:47:13 +01:00
committed by Warner Losh
parent 98bdf63f6e
commit 851dffef53
1 changed files with 8 additions and 0 deletions
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sys/dev/ichiic/ig4_pci.c
+8
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@@ -192,6 +192,10 @@ static int ig4iic_pci_detach(device_t dev);
#define PCI_CHIP_ARROWLAKE_U_I2C_3 0x777b8086
#define PCI_CHIP_ARROWLAKE_U_I2C_4 0x77508086
#define PCI_CHIP_ARROWLAKE_U_I2C_5 0x77518086
#define PCI_CHIP_LUNARLAKE_M_I2C_0 0xa8788086
#define PCI_CHIP_LUNARLAKE_M_I2C_1 0xa8798086
#define PCI_CHIP_LUNARLAKE_M_I2C_2 0xa87a8086
#define PCI_CHIP_LUNARLAKE_M_I2C_3 0xa87b8086
struct ig4iic_pci_device {
uint32_t devid;
@@ -328,6 +332,10 @@ static struct ig4iic_pci_device ig4iic_pci_devices[] = {
{ PCI_CHIP_ARROWLAKE_U_I2C_3, "Intel Arrow Lake-H/U I2C Controller-3", IG4_TIGERLAKE},
{ PCI_CHIP_ARROWLAKE_U_I2C_4, "Intel Arrow Lake-H/U I2C Controller-4", IG4_TIGERLAKE},
{ PCI_CHIP_ARROWLAKE_U_I2C_5, "Intel Arrow Lake-H/U I2C Controller-5", IG4_TIGERLAKE},
{ PCI_CHIP_LUNARLAKE_M_I2C_0, "Intel Lunar Lake-M I2C Controller-0", IG4_TIGERLAKE},
{ PCI_CHIP_LUNARLAKE_M_I2C_1, "Intel Lunar Lake-M I2C Controller-1", IG4_TIGERLAKE},
{ PCI_CHIP_LUNARLAKE_M_I2C_2, "Intel Lunar Lake-M I2C Controller-2", IG4_TIGERLAKE},
{ PCI_CHIP_LUNARLAKE_M_I2C_3, "Intel Lunar Lake-M I2C Controller-3", IG4_TIGERLAKE},
};
static int