diff options
| author | Adrian Hunter <adrian.hunter@intel.com> | 2026-01-06 18:44:12 +0200 |
|---|---|---|
| committer | Alexandre Belloni <alexandre.belloni@bootlin.com> | 2026-01-14 15:53:34 +0100 |
| commit | b8460480f62e16751876a1f367dc14fb62867463 (patch) | |
| tree | 982dbcb30f84fe49a823abbb3b2db2c7b13b87a4 /include/linux | |
| parent | 35c0bfe8fd1066c61420b076e7bcd3cfa54b9d92 (diff) | |
i3c: mipi-i3c-hci: Allow for Multi-Bus Instances
Add support for MIPI I3C Host Controllers with the Multi-Bus Instance
capability. These controllers can host multiple I3C buses (up to 15)
within a single hardware function (e.g., PCIe B/D/F), providing one
indepedent HCI register set and corresponding I3C bus controller logic
per bus.
A separate platform device will represent each instance, but it is
necessary to allow for shared resources.
Multi-bus instances share the same MMIO address space, but the ranges are
not guaranteed to be contiguous. To avoid overlapping mappings, pass
base_regs from the parent mapping to child devices.
Allow the IRQ to be shared among instances.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Link: https://patch.msgid.link/20260106164416.67074-8-adrian.hunter@intel.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/platform_data/mipi-i3c-hci.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/include/linux/platform_data/mipi-i3c-hci.h b/include/linux/platform_data/mipi-i3c-hci.h new file mode 100644 index 000000000000..ab7395f455f9 --- /dev/null +++ b/include/linux/platform_data/mipi-i3c-hci.h @@ -0,0 +1,15 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef INCLUDE_PLATFORM_DATA_MIPI_I3C_HCI_H +#define INCLUDE_PLATFORM_DATA_MIPI_I3C_HCI_H + +#include <linux/compiler_types.h> + +/** + * struct mipi_i3c_hci_platform_data - Platform-dependent data for mipi_i3c_hci + * @base_regs: Register set base address (to support multi-bus instances) + */ +struct mipi_i3c_hci_platform_data { + void __iomem *base_regs; +}; + +#endif |