linux-kernel - [PATCH 1/2] platform/x86/intel/pmc: Add resume

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Date:   Fri,  2 Jun 2023 16:21:41 -0700
From:   "David E. Box" <david.e.box@...ux.intel.com>
To:     irenic.rajneesh@...il.com, david.e.box@...ux.intel.com,
        hdegoede@...hat.com, markgross@...nel.org,
        ilpo.jarvinen@...ux.intel.com
Cc:     platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 1/2] platform/x86/intel/pmc: Add resume_fixup callback

Add a resume_fixup callback to perform platform specific fixups during
resume from suspend.

Signed-off-by: David E. Box <david.e.box@...ux.intel.com>
---
 drivers/platform/x86/intel/pmc/core.c | 3 +++
 drivers/platform/x86/intel/pmc/core.h | 2 ++
 2 files changed, 5 insertions(+)

diff --git a/drivers/platform/x86/intel/pmc/core.c b/drivers/platform/x86/intel/pmc/core.c
index da6e7206d38b..0fcd1cb7264b 100644
--- a/drivers/platform/x86/intel/pmc/core.c
+++ b/drivers/platform/x86/intel/pmc/core.c
@@ -1229,6 +1229,9 @@ static __maybe_unused int pmc_core_resume(struct device *dev)
 	const struct pmc_bit_map **maps = pmcdev->map->lpm_sts;
 	int offset = pmcdev->map->lpm_status_offset;
 
+	if (pmcdev->resume_fixup)
+		pmcdev->resume_fixup();
+
 	/* Check if the syspend used S0ix */
 	if (pm_suspend_via_firmware())
 		return 0;
diff --git a/drivers/platform/x86/intel/pmc/core.h b/drivers/platform/x86/intel/pmc/core.h
index 9ca9b9746719..b58458d00bd3 100644
--- a/drivers/platform/x86/intel/pmc/core.h
+++ b/drivers/platform/x86/intel/pmc/core.h
@@ -327,6 +327,7 @@ struct pmc_reg_map {
  * @lpm_en_modes:	Array of enabled modes from lowest to highest priority
  * @lpm_req_regs:	List of substate requirements
  * @core_configure:	Function pointer to configure the platform
+ * @resume_fixup:	Function to perform fixups during resume
  *
  * pmc_dev contains info about power management controller device.
  */
@@ -345,6 +346,7 @@ struct pmc_dev {
 	int lpm_en_modes[LPM_MAX_NUM_MODES];
 	u32 *lpm_req_regs;
 	void (*core_configure)(struct pmc_dev *pmcdev);
+	void (*resume_fixup)(void);
 };
 
 extern const struct pmc_bit_map msr_map[];
-- 
2.34.1