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    Subject[PATCH V2 12/13] platform/x86/intel/pmc: Read low power mode requirements for MTL-M and MTL-P
    Date
    From: Xi Pardee <xi.pardee@intel.com>

    Add support to read the low power mode requirements for Meteor Lake M and
    Meteor Lake P.

    Signed-off-by: Xi Pardee <xi.pardee@intel.com>
    Signed-off-by: David E. Box <david.e.box@linux.intel.com>
    ---
    V2 - fixed unused return value

    drivers/platform/x86/intel/pmc/mtl.c | 41 +++++++++++++++++++++++-----
    1 file changed, 34 insertions(+), 7 deletions(-)

    diff --git a/drivers/platform/x86/intel/pmc/mtl.c b/drivers/platform/x86/intel/pmc/mtl.c
    index 780874142a90..78c9a80bd929 100644
    --- a/drivers/platform/x86/intel/pmc/mtl.c
    +++ b/drivers/platform/x86/intel/pmc/mtl.c
    @@ -11,6 +11,13 @@
    #include <linux/pci.h>
    #include "core.h"

    +/* PMC SSRAM PMT Telemetry GUIDS */
    +#define SOCP_LPM_REQ_GUID 0x2625030
    +#define IOEM_LPM_REQ_GUID 0x4357464
    +#define IOEP_LPM_REQ_GUID 0x5077612
    +
    +static const u8 MTL_LPM_REG_INDEX[] = {0, 4, 5, 6, 8, 9, 10, 11, 12, 13, 14, 15, 16, 20};
    +
    /*
    * Die Mapping to Product.
    * Product SOCDie IOEDie PCHDie
    @@ -465,6 +472,7 @@ const struct pmc_reg_map mtl_socm_reg_map = {
    .lpm_sts = mtl_socm_lpm_maps,
    .lpm_status_offset = MTL_LPM_STATUS_OFFSET,
    .lpm_live_status_offset = MTL_LPM_LIVE_STATUS_OFFSET,
    + .lpm_reg_index = MTL_LPM_REG_INDEX,
    };

    const struct pmc_bit_map mtl_ioep_pfear_map[] = {
    @@ -782,6 +790,13 @@ const struct pmc_reg_map mtl_ioep_reg_map = {
    .ltr_show_sts = mtl_ioep_ltr_show_map,
    .ltr_ignore_offset = CNP_PMC_LTR_IGNORE_OFFSET,
    .ltr_ignore_max = ADL_NUM_IP_IGN_ALLOWED,
    + .lpm_num_maps = ADL_LPM_NUM_MAPS,
    + .lpm_res_counter_step_x2 = TGL_PMC_LPM_RES_COUNTER_STEP_X2,
    + .lpm_residency_offset = MTL_LPM_RESIDENCY_OFFSET,
    + .lpm_priority_offset = MTL_LPM_PRI_OFFSET,
    + .lpm_en_offset = MTL_LPM_EN_OFFSET,
    + .lpm_sts_latch_en_offset = MTL_LPM_STATUS_LATCH_EN_OFFSET,
    + .lpm_reg_index = MTL_LPM_REG_INDEX,
    };

    const struct pmc_bit_map mtl_ioem_pfear_map[] = {
    @@ -922,6 +937,13 @@ const struct pmc_reg_map mtl_ioem_reg_map = {
    .ltr_show_sts = mtl_ioep_ltr_show_map,
    .ltr_ignore_offset = CNP_PMC_LTR_IGNORE_OFFSET,
    .ltr_ignore_max = ADL_NUM_IP_IGN_ALLOWED,
    + .lpm_sts_latch_en_offset = MTL_LPM_STATUS_LATCH_EN_OFFSET,
    + .lpm_num_maps = ADL_LPM_NUM_MAPS,
    + .lpm_priority_offset = MTL_LPM_PRI_OFFSET,
    + .lpm_en_offset = MTL_LPM_EN_OFFSET,
    + .lpm_res_counter_step_x2 = TGL_PMC_LPM_RES_COUNTER_STEP_X2,
    + .lpm_residency_offset = MTL_LPM_RESIDENCY_OFFSET,
    + .lpm_reg_index = MTL_LPM_REG_INDEX,
    };

    #define PMC_DEVID_SOCM 0x7e7f
    @@ -929,16 +951,19 @@ const struct pmc_reg_map mtl_ioem_reg_map = {
    #define PMC_DEVID_IOEM 0x7ebf
    static struct pmc_info mtl_pmc_info_list[] = {
    {
    - .devid = PMC_DEVID_SOCM,
    - .map = &mtl_socm_reg_map,
    + .guid = SOCP_LPM_REQ_GUID,
    + .devid = PMC_DEVID_SOCM,
    + .map = &mtl_socm_reg_map,
    },
    {
    - .devid = PMC_DEVID_IOEP,
    - .map = &mtl_ioep_reg_map,
    + .guid = IOEP_LPM_REQ_GUID,
    + .devid = PMC_DEVID_IOEP,
    + .map = &mtl_ioep_reg_map,
    },
    {
    - .devid = PMC_DEVID_IOEM,
    - .map = &mtl_ioem_reg_map
    + .guid = IOEM_LPM_REQ_GUID,
    + .devid = PMC_DEVID_IOEM,
    + .map = &mtl_ioem_reg_map
    },
    {}
    };
    @@ -1012,5 +1037,7 @@ int mtl_core_init(struct pmc_dev *pmcdev)
    dev_dbg(&pmcdev->pdev->dev, "ignoring GBE LTR\n");
    pmc_core_send_ltr_ignore(pmcdev, 3);

    - return 0;
    + ret = pmc_core_ssram_get_lpm_reqs(pmcdev);
    +
    + return ret;
    }
    --
    2.34.1
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