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Date: Mon, 14 Nov 2022 10:32:57 -0800
From: Gayatri Kammela <gayatri.kammela@...ux.intel.com>
To: hdegoede@...hat.com
Cc: irenic.rajneesh@...il.com, markgross@...nel.org,
linux-kernel@...r.kernel.org, platform-driver-x86@...r.kernel.org,
sukumar.ghorai@...el.com, xi.pardee@...el.com,
rajvi.jingar@...el.com,
Gayatri Kammela <gayatri.kammela@...ux.intel.com>,
David E Box <david.e.box@...ux.intel.com>
Subject: [PATCH v1 8/8] platform/x86: intel/pmc/core: Add Meteor Lake support to pmc core driver
Add Meteor Lake client and mobile support to pmc core driver. This patch
adds legacy support.
Cc: David E Box <david.e.box@...ux.intel.com>
Suggested-by: David E Box <david.e.box@...ux.intel.com>
Reviewed-by: "David E. Box" <david.e.box@...ux.intel.com>
Signed-off-by: Sukumar Ghorai <sukumar.ghorai@...el.com>
Signed-off-by: Gayatri Kammela <gayatri.kammela@...ux.intel.com>
Signed-off-by: "David E. Box" <david.e.box@...ux.intel.com>
---
drivers/platform/x86/intel/pmc/Makefile | 2 +-
drivers/platform/x86/intel/pmc/core.c | 7 +++-
drivers/platform/x86/intel/pmc/core.h | 13 +++++++
drivers/platform/x86/intel/pmc/mtl.c | 52 +++++++++++++++++++++++++
4 files changed, 72 insertions(+), 2 deletions(-)
create mode 100644 drivers/platform/x86/intel/pmc/mtl.c
diff --git a/drivers/platform/x86/intel/pmc/Makefile b/drivers/platform/x86/intel/pmc/Makefile
index 0135918ea718..f96bc2e19503 100644
--- a/drivers/platform/x86/intel/pmc/Makefile
+++ b/drivers/platform/x86/intel/pmc/Makefile
@@ -4,7 +4,7 @@
#
intel_pmc_core-y := core.o spt.o cnp.o icl.o tgl.o \
- adl.o
+ adl.o mtl.o
obj-$(CONFIG_INTEL_PMC_CORE) += intel_pmc_core.o
intel_pmc_core_pltdrv-y := pltdrv.o
obj-$(CONFIG_INTEL_PMC_CORE) += intel_pmc_core_pltdrv.o
diff --git a/drivers/platform/x86/intel/pmc/core.c b/drivers/platform/x86/intel/pmc/core.c
index 14dfeac73521..f1d802f6ec3f 100644
--- a/drivers/platform/x86/intel/pmc/core.c
+++ b/drivers/platform/x86/intel/pmc/core.c
@@ -901,7 +901,11 @@ static void pmc_core_get_low_power_modes(struct platform_device *pdev)
return;
lpm_en = pmc_core_reg_read(pmcdev, pmcdev->map->lpm_en_offset);
- pmcdev->num_lpm_modes = hweight32(lpm_en);
+ /* For MTL, BIT 31 is not an lpm mode but a enable bit.
+ * Lower byte is enough to cover the number of lpm modes for all
+ * platforms and hence mask the upper 3 bytes.
+ */
+ pmcdev->num_lpm_modes = hweight32(lpm_en & 0xFF);
/* Read 32 bit LPM_PRI register */
lpm_pri = pmc_core_reg_read(pmcdev, pmcdev->map->lpm_priority_offset);
@@ -1024,6 +1028,7 @@ static const struct x86_cpu_id intel_pmc_core_ids[] = {
X86_MATCH_INTEL_FAM6_MODEL(RAPTORLAKE_P, tgl_core_init),
X86_MATCH_INTEL_FAM6_MODEL(RAPTORLAKE, adl_core_init),
X86_MATCH_INTEL_FAM6_MODEL(RAPTORLAKE_S, adl_core_init),
+ X86_MATCH_INTEL_FAM6_MODEL(METEORLAKE, mtl_core_init),
{}
};
diff --git a/drivers/platform/x86/intel/pmc/core.h b/drivers/platform/x86/intel/pmc/core.h
index 129c0c98f1a6..810204d758ab 100644
--- a/drivers/platform/x86/intel/pmc/core.h
+++ b/drivers/platform/x86/intel/pmc/core.h
@@ -238,6 +238,16 @@ enum ppfear_regs {
#define ADL_LPM_STATUS_LATCH_EN_OFFSET 0x1704
#define ADL_LPM_LIVE_STATUS_OFFSET 0x1764
+/* Meteor Lake Power Management Controller register offsets */
+#define MTL_LPM_EN_OFFSET 0x1798
+#define MTL_LPM_RESIDENCY_OFFSET 0x17A0
+
+/* Meteor Lake Low Power Mode debug registers */
+#define MTL_LPM_PRI_OFFSET 0x179C
+#define MTL_LPM_STATUS_LATCH_EN_OFFSET 0x16F8
+#define MTL_LPM_STATUS_OFFSET 0x1700
+#define MTL_LPM_LIVE_STATUS_OFFSET 0x175C
+
extern const char *pmc_lpm_modes[];
struct pmc_bit_map {
@@ -383,6 +393,7 @@ extern const struct pmc_bit_map adl_vnn_req_status_3_map[];
extern const struct pmc_bit_map adl_vnn_misc_status_map[];
extern const struct pmc_bit_map *adl_lpm_maps[];
extern const struct pmc_reg_map adl_reg_map;
+extern const struct pmc_reg_map mtl_reg_map;
extern void pmc_core_get_tgl_lpm_reqs(struct platform_device *pdev);
extern int pmc_core_send_ltr_ignore(struct pmc_dev *pmcdev, u32 value);
@@ -392,8 +403,10 @@ void cnp_core_init(struct pmc_dev *pmcdev);
void icl_core_init(struct pmc_dev *pmcdev);
void tgl_core_init(struct pmc_dev *pmcdev);
void adl_core_init(struct pmc_dev *pmcdev);
+void mtl_core_init(struct pmc_dev *pmcdev);
void tgl_core_configure(struct pmc_dev *pmcdev);
void adl_core_configure(struct pmc_dev *pmcdev);
+void mtl_core_configure(struct pmc_dev *pmcdev);
#define pmc_for_each_mode(i, mode, pmcdev) \
for (i = 0, mode = pmcdev->lpm_en_modes[i]; \
diff --git a/drivers/platform/x86/intel/pmc/mtl.c b/drivers/platform/x86/intel/pmc/mtl.c
new file mode 100644
index 000000000000..eeb3bd8c2502
--- /dev/null
+++ b/drivers/platform/x86/intel/pmc/mtl.c
@@ -0,0 +1,52 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * This file contains platform specific structure definitions
+ * and init function used by Meteor Lake PCH.
+ *
+ * Copyright (c) 2022, Intel Corporation.
+ * All Rights Reserved.
+ *
+ */
+
+#include "core.h"
+
+const struct pmc_reg_map mtl_reg_map = {
+ .pfear_sts = ext_tgl_pfear_map,
+ .slp_s0_offset = CNP_PMC_SLP_S0_RES_COUNTER_OFFSET,
+ .slp_s0_res_counter_step = TGL_PMC_SLP_S0_RES_COUNTER_STEP,
+ .ltr_show_sts = adl_ltr_show_map,
+ .msr_sts = msr_map,
+ .ltr_ignore_offset = CNP_PMC_LTR_IGNORE_OFFSET,
+ .regmap_length = CNP_PMC_MMIO_REG_LEN,
+ .ppfear0_offset = CNP_PMC_HOST_PPFEAR0A,
+ .ppfear_buckets = ICL_PPFEAR_NUM_ENTRIES,
+ .pm_cfg_offset = CNP_PMC_PM_CFG_OFFSET,
+ .pm_read_disable_bit = CNP_PMC_READ_DISABLE_BIT,
+ .ltr_ignore_max = ADL_NUM_IP_IGN_ALLOWED,
+ .lpm_num_modes = ADL_LPM_NUM_MODES,
+ .lpm_num_maps = ADL_LPM_NUM_MAPS,
+ .lpm_res_counter_step_x2 = TGL_PMC_LPM_RES_COUNTER_STEP_X2,
+ .etr3_offset = ETR3_OFFSET,
+ .lpm_sts_latch_en_offset = MTL_LPM_STATUS_LATCH_EN_OFFSET,
+ .lpm_priority_offset = MTL_LPM_PRI_OFFSET,
+ .lpm_en_offset = MTL_LPM_EN_OFFSET,
+ .lpm_residency_offset = MTL_LPM_RESIDENCY_OFFSET,
+ .lpm_sts = adl_lpm_maps,
+ .lpm_status_offset = MTL_LPM_STATUS_OFFSET,
+ .lpm_live_status_offset = MTL_LPM_LIVE_STATUS_OFFSET,
+};
+
+void mtl_core_configure(struct pmc_dev *pmcdev)
+{
+ /* Due to a hardware limitation, the GBE LTR blocks PC10
+ * when a cable is attached. Tell the PMC to ignore it.
+ */
+ dev_dbg(&pmcdev->pdev->dev, "ignoring GBE LTR\n");
+ pmc_core_send_ltr_ignore(pmcdev, 3);
+}
+
+void mtl_core_init(struct pmc_dev *pmcdev)
+{
+ pmcdev->map = &mtl_reg_map;
+ pmcdev->core_configure = mtl_core_configure;
+}
--
2.34.1
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