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bus: mhi: host: pci_generic: Add IP_CTRL channel for Sierra EM919x/EM929x

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IP_CTRL is a standard Qualcomm MHI control channel (channels 18/19) that
carries the host serial control lines (DTR/RTS) to the modem; it is not
Sierra-specific. It was not enumerated for any device in pci_generic, so
the host had no way to drive those signals.

Add it to the Sierra em919x channel config (shared by the EM919x and
EM929x) using the control event ring.

Signed-off-by: Peter Hunt <peter.hunt@opengear.com>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@oss.qualcomm.com>
Reviewed-by: Loic Poulain <loic.poulain@oss.qualcomm.com>
This commit is contained in:
Peter Hunt 2026-08-20 08:49:26 +10:00 committed by Manivannan Sadhasivam
parent cee9395acd
commit 83c29a55b8
1 changed files with 2 additions and 0 deletions
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2
drivers/bus/mhi/host/pci_generic.c
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@ -732,6 +732,8 @@ static const struct mhi_channel_config mhi_sierra_em919x_channels[] = {
MHI_CHANNEL_CONFIG_DL(13, "MBIM", 128, 0),
MHI_CHANNEL_CONFIG_UL(14, "QMI", 32, 0),
MHI_CHANNEL_CONFIG_DL(15, "QMI", 32, 0),
MHI_CHANNEL_CONFIG_UL(18, "IP_CTRL", 32, 0),
MHI_CHANNEL_CONFIG_DL(19, "IP_CTRL", 32, 0),
MHI_CHANNEL_CONFIG_UL(32, "DUN", 32, 0),
MHI_CHANNEL_CONFIG_DL(33, "DUN", 32, 0),
MHI_CHANNEL_CONFIG_HW_UL(100, "IP_HW0", 512, 1),