Martin Roth merged this change.
soc/intel/common/lpss: Add function to check for a LPSS controller
Add an API to check if device is a LPSS controller. This API can be
used for IRQ assignments for LPSS PCI controllers, since the LPSS
controllers have a requirement of unique IRQ assignments and do not
share same IRQ# with other LPSS controllers.
SOC code is reponsible to provide list of the LPSS controllers
supported and needs to implement soc_lpss_controllers_list API,
in case it needs to use this common implementation.
Change-Id: I3f5bb268fc581280bb1b87b6b175a0299a24a44a
Signed-off-by: Aamir Bohra <aamir.bohra@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/34137
Reviewed-by: Paul Fagerburg <pfagerburg@chromium.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
---
M src/soc/intel/common/block/include/intelblocks/lpss.h
M src/soc/intel/common/block/lpss/lpss.c
2 files changed, 27 insertions(+), 0 deletions(-)
diff --git a/src/soc/intel/common/block/include/intelblocks/lpss.h b/src/soc/intel/common/block/include/intelblocks/lpss.h
index dafe351..e80f3dd 100644
--- a/src/soc/intel/common/block/include/intelblocks/lpss.h
+++ b/src/soc/intel/common/block/include/intelblocks/lpss.h
@@ -40,4 +40,13 @@
/* Set controller power state to D0 or D3*/
void lpss_set_power_state(const struct device *dev, enum lpss_pwr_state state);
+/*
+ * Handler to get list of LPSS controllers. The SOC is expected to send out a
+ * list of pci devfn for all LPSS controllers supported by the SOC.
+ */
+const pci_devfn_t *soc_lpss_controllers_list(size_t *size);
+
+/* Check if the device is a LPSS controller */
+bool is_dev_lpss(const struct device *dev);
+
#endif /* SOC_INTEL_COMMON_BLOCK_LPSS_H */
diff --git a/src/soc/intel/common/block/lpss/lpss.c b/src/soc/intel/common/block/lpss/lpss.c
index a519bf6..1722dcd 100644
--- a/src/soc/intel/common/block/lpss/lpss.c
+++ b/src/soc/intel/common/block/lpss/lpss.c
@@ -89,3 +89,21 @@
pci_update_config8(lpss_dev, PME_CTRL_STATUS, ~POWER_STATE_MASK, state);
}
+
+bool is_dev_lpss(const struct device *dev)
+{
+ static size_t size;
+ static const pci_devfn_t *lpss_devices;
+
+ if (dev->path.type != DEVICE_PATH_PCI)
+ return false;
+
+ if (!lpss_devices)
+ lpss_devices = soc_lpss_controllers_list(&size);
+
+ for (int i = 0; i < size; i++) {
+ if (lpss_devices[i] == dev->path.pci.devfn)
+ return true;
+ }
+ return false;
+}
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