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mfd: lpss: Fix enumerate i2c device issue with kernels < 6.x #150

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mfd: lpss: Fix enumerate i2c device issue with kernels < 6.x #150

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4 changes: 4 additions & 0 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -192,3 +192,7 @@ Three ways are available:
sudo dkms add .
sudo dkms autoinstall ipu6-drivers/0.0.0
```

### Note
If your kernel version is below v5.19, you will need to apply this patch.
On the intel platform, The i2c port 6 and 7 might not have been registered in the PCIe bus.
29 changes: 29 additions & 0 deletions patch/0001-mfd-lpss-Fix-enumerate-i2c-device-issue.patch
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@@ -0,0 +1,29 @@
From 7d333ca1a7e9ada6e8513fc90c067616c0172036 Mon Sep 17 00:00:00 2001
From: "jason.z.chen" <[email protected]>
Date: Thu, 2 Feb 2023 16:28:17 +0800
Subject: [PATCH] mfd: lpss: Fix enumerate i2c device issue

Add the device id of pci for i2c controller which can be
recognized by lpss driver

Signed-off-by: jason.z.chen <[email protected]>
---
drivers/mfd/intel-lpss-pci.c | 2 ++
1 file changed, 2 insertions(+)

diff --git a/drivers/mfd/intel-lpss-pci.c b/drivers/mfd/intel-lpss-pci.c
index c54d19fb184c..2d7e73477714 100644
--- a/drivers/mfd/intel-lpss-pci.c
+++ b/drivers/mfd/intel-lpss-pci.c
@@ -305,6 +305,8 @@ static const struct pci_device_id intel_lpss_pci_ids[] = {
{ PCI_VDEVICE(INTEL, 0x51c5), (kernel_ulong_t)&bxt_i2c_info },
{ PCI_VDEVICE(INTEL, 0x51c6), (kernel_ulong_t)&bxt_i2c_info },
{ PCI_VDEVICE(INTEL, 0x51c7), (kernel_ulong_t)&bxt_uart_info },
+ { PCI_VDEVICE(INTEL, 0x51d8), (kernel_ulong_t)&bxt_i2c_info },
+ { PCI_VDEVICE(INTEL, 0x51d9), (kernel_ulong_t)&bxt_i2c_info },
{ PCI_VDEVICE(INTEL, 0x51e8), (kernel_ulong_t)&bxt_i2c_info },
{ PCI_VDEVICE(INTEL, 0x51e9), (kernel_ulong_t)&bxt_i2c_info },
{ PCI_VDEVICE(INTEL, 0x51ea), (kernel_ulong_t)&bxt_i2c_info },
--
2.34.1