[PATCH v2 10/11] platform/x86:intel/pmt: Get PMC from SSRAM for Lunar Lake

Xi Pardee
2024-08-28T22:29:42Z

Add support to discover and achieve PMC information from Intel
SSRAM Telemetry driver for Lunar Lake platforms.

Signed-off-by: Xi Pardee <xi.pardee@linux.intel.com>
---
drivers/platform/x86/intel/pmc/lnl.c | 26 ++++++++++++++++++++++----
1 file changed, 22 insertions(+), 4 deletions(-)

diff --git a/drivers/platform/x86/intel/pmc/lnl.c b/drivers/platform/x86/intel/pmc/lnl.c
index e7a8077d1a3e..109b08d43fc8 100644
--- a/drivers/platform/x86/intel/pmc/lnl.c
+++ b/drivers/platform/x86/intel/pmc/lnl.c
@@ -13,6 +13,14 @@

#include "core.h"

+static struct pmc_info lnl_pmc_info_list[] = {
+ {
+ .devid = PMC_DEVID_LNL_SOCM,
+ .map = &lnl_socm_reg_map,
+ },
+ {}
+};
+
const struct pmc_bit_map lnl_ltr_show_map[] = {
{"SOUTHPORT_A", CNP_PMC_LTR_SPA},
{"SOUTHPORT_B", CNP_PMC_LTR_SPB},
@@ -561,10 +569,20 @@ int lnl_core_init(struct pmc_dev *pmcdev)
pmcdev->suspend = cnl_suspend;
pmcdev->resume = lnl_resume;

- pmc->map = &lnl_socm_reg_map;
- ret = get_primary_reg_base(pmc);
- if (ret)
- return ret;
+ pmcdev->regmap_list = lnl_pmc_info_list;
+ ret = pmc_core_ssram_get_reg_base(pmcdev);
+
+ /* Try again later after Intel PMC SSRAM Telemetry driver finishes probe */
+ if (ret == -EAGAIN)
+ return -EPROBE_DEFER;
+
+ /* If regbase not assigned, set map and discover using legacy method */
+ if (ret) {
+ pmc->map = &lnl_socm_reg_map;
+ ret = get_primary_reg_base(pmc);
+ if (ret)
+ return ret;
+ }

pmc_core_get_low_power_modes(pmcdev);

--
2.43.0