platform/x86/intel: pmc/core: Add GBE Package C10 fix for Alder Lake PCH

Alder PCH uses the same Gigabit Ethernet (GBE) device as Tiger Lake PCH
which cannot achieve PC10 without ignoring the PMC GBE LTR. Add this
work around for Alder Lake PCH as well.

Cc: Chao Qin <chao.qin@intel.com>
Cc: Srinivas Pandruvada <srinivas.pandruvada@intel.com>
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Tested-by: You-Sheng Yang <vicamo.yang@canonical.com>
Acked-by: Rajneesh Bhardwaj <irenic.rajneesh@gmail.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: David E. Box <david.e.box@linux.intel.com>
Link: https://lore.kernel.org/r/9168e8bd687f2d0d5eb0ed116e08d0764eadf7b3.1629091915.git.gayatri.kammela@intel.com
Signed-off-by: Hans de Goede <hdegoede@redhat.com>

diff --git a/drivers/platform/x86/intel/pmc/core.c b/drivers/platform/x86/intel/pmc/core.c
index 42f49ad0793db255e3b90bc18c5f7b177b82daee..ac19fcc9abbf5721844122ed1b5fb3607ac0aeed 100644 (file)
--- a/drivers/platform/x86/intel/pmc/core.c
+++ b/drivers/platform/x86/intel/pmc/core.c
@@ -2020,10 +2020,10 @@ static int pmc_core_probe(struct platform_device *pdev)
                pmc_core_get_tgl_lpm_reqs(pdev);
 
        /*
-        * On TGL, due to a hardware limitation, the GBE LTR blocks PC10 when
-        * a cable is attached. Tell the PMC to ignore it.
+        * On TGL and ADL, due to a hardware limitation, the GBE LTR blocks PC10
+        * when a cable is attached. Tell the PMC to ignore it.
         */
-       if (pmcdev->map == &tgl_reg_map) {
+       if (pmcdev->map == &tgl_reg_map || pmcdev->map == &adl_reg_map) {
                dev_dbg(&pdev->dev, "ignoring GBE LTR\n");
                pmc_core_send_ltr_ignore(pmcdev, 3);
        }