[PATCH] bus: mhi: host: pci_generic: Add DUN channel configuration

From: Krishna Chaitanya Chundru

Date: Fri Sep 25 2026 - 00:38:17 EST


Add the DUN uplink (ch32) and downlink (ch33) channel definitions to
the Qualcomm modem MHI channel configuration table.
 
These channels are used for transporting AT commands over MHI.
Defining them allows the MHI core to create the corresponding DUN MHI
devices and enables userspace access to the modem AT interface through
the associated client driver.

Signed-off-by: Krishna Chaitanya Chundru <krishna.chundru@xxxxxxxxxxxxxxxx>
---
drivers/bus/mhi/host/pci_generic.c | 2 ++
1 file changed, 2 insertions(+)

diff --git a/drivers/bus/mhi/host/pci_generic.c b/drivers/bus/mhi/host/pci_generic.c
index b636e2c23b4d..cb4e921d9029 100644
--- a/drivers/bus/mhi/host/pci_generic.c
+++ b/drivers/bus/mhi/host/pci_generic.c
@@ -322,6 +322,8 @@ static const struct mhi_channel_config modem_qcom_v1_mhi_channels[] = {
MHI_CHANNEL_CONFIG_DL(15, "QMI", 4, 0),
MHI_CHANNEL_CONFIG_UL(20, "IPCR", 8, 0),
MHI_CHANNEL_CONFIG_DL(21, "IPCR", 8, 0),
+ MHI_CHANNEL_CONFIG_UL(32, "DUN", 32, 0),
+ MHI_CHANNEL_CONFIG_DL(33, "DUN", 32, 0),
MHI_CHANNEL_CONFIG_UL_FP(34, "FIREHOSE", 32, 0),
MHI_CHANNEL_CONFIG_DL_FP(35, "FIREHOSE", 32, 0),
MHI_CHANNEL_CONFIG_UL(46, "IP_SW0", 64, 2),

---
base-commit: 165768bb70265b5c38cf0b73fafd75be235f8b14
change-id: 20260925-mhi_dun-abb504fe785f

Best regards,
--
Krishna Chaitanya Chundru <krishna.chundru@xxxxxxxxxxxxxxxx>