This patch series removes the SSRAM support from Intel PMC Core driver and creates a separate PCI driver for SSRAM device. The new Intel PMC SSRAM driver provides the following functionalities: 1. Search and store the PMC information in a structure, including PWRMBASE address and devid for each available PMC. Then Intel PMC Core driver achieves the PMC information using the API provided by the new driver. 2. Search and register Intel Platform Monitoring Techology telemetry regions so they would by available for read through sysfs and Intel PMT API. Intel PMC Core driver can achieve Low Power Mode requirement information from a telemetry region registered by the new driver. The above functionalities was previously handled by Intel PMC Core driver. Intel PMC Core driver returns -EPROBE_DEFER when trying to read data from a telem region that is not available yet. This setup may result in an infinite loop of .probe() calls as Intel PMC Core driver creates child devices. Creating a separate PCI driver avoids the infinite loop possibility. Changes in v2: - Rearrange and restructure patches completely based on feedback from v1 - Here are the patches: Preparation for the new SSRAM Telemetry driver: platform/x86:intel/pmc: Move PMC Core related functions platform/x86:intel/pmc: Rename core_ssram to ssram_telemetry platform/x86:intel/pmc: Move PMC devid to core.h Minor bug fix: platform/x86:intel/pmc: Convert index variables to be unsigned platform/x86:intel/pmc: Remove unneeded h file inclusion platform/x86:intel/pmc: Remove unneeded io operations platform/x86:intel/pmc: Check return value of ioremap Create new driver and convert PMC Core to use the API: platform/x86:intel/pmc: Create Intel PMC SSRAM Telemetry driver Enable Lunar Lake platform: platform/x86:intel/pmc: Add Lunar Lake SSRAM devid platform/x86:intel/pmt: Get PMC from SSRAM for Lunar Lake platform/x86:intel/pmc: Get LPM information for Lunar Lake Xi Pardee (11): platform/x86:intel/pmc: Move PMC Core related functions platform/x86:intel/pmc: Rename core_ssram to ssram_telemetry platform/x86:intel/pmc: Move PMC devid to core.h platform/x86:intel/pmc: Convert index variables to be unsigned platform/x86:intel/pmc: Remove unneeded h file inclusion platform/x86:intel/pmc: Remove unneeded io operations platform/x86:intel/pmc: Check return value of ioremap platform/x86:intel/pmc: Create Intel PMC SSRAM Telemetry driver platform/x86:intel/pmc: Add Lunar Lake SSRAM devid platform/x86:intel/pmt: Get PMC from SSRAM for Lunar Lake platform/x86:intel/pmc: Get LPM information for Lunar Lake drivers/platform/x86/intel/pmc/Kconfig | 11 + drivers/platform/x86/intel/pmc/Makefile | 8 +- drivers/platform/x86/intel/pmc/arl.c | 24 +- drivers/platform/x86/intel/pmc/core.c | 200 +++++++++++ drivers/platform/x86/intel/pmc/core.h | 23 +- drivers/platform/x86/intel/pmc/core_ssram.c | 326 ------------------ drivers/platform/x86/intel/pmc/lnl.c | 41 ++- drivers/platform/x86/intel/pmc/mtl.c | 24 +- .../platform/x86/intel/pmc/ssram_telemetry.c | 183 ++++++++++ .../platform/x86/intel/pmc/ssram_telemetry.h | 45 +++ 10 files changed, 525 insertions(+), 360 deletions(-) delete mode 100644 drivers/platform/x86/intel/pmc/core_ssram.c create mode 100644 drivers/platform/x86/intel/pmc/ssram_telemetry.c create mode 100644 drivers/platform/x86/intel/pmc/ssram_telemetry.h -- 2.43.0
