linux-kernel - [PATCH] platform/x86/intel/tpmi/plr: Make the file domain<n>/status writeable

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Message-Id: <20260127-plr-debugfs-write-v1-1-1fffbc370b1e@linux.intel.com>
Date: Tue, 27 Jan 2026 15:45:40 -0800
From: Ricardo Neri <ricardo.neri-calderon@...ux.intel.com>
To: Hans de Goede <hansg@...nel.org>, 
 Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
Cc: Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>, 
 platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org, 
 Ricardo Neri <ricardo.neri-calderon@...ux.intel.com>
Subject: [PATCH] platform/x86/intel/tpmi/plr: Make the file
 domain<n>/status writeable

The file sys/kernel/debug/tpmi-<n>/plr/domain<n>/status has store and show
callbacks. Make it writeable.

Fixes: 811f67c51636d ("platform/x86/intel/tpmi: Add new auxiliary driver for performance limits")
Signed-off-by: Ricardo Neri <ricardo.neri-calderon@...ux.intel.com>
---
I tested this patch in Sierra Forest and Granite Rapids-D systems.

$ echo 0 > /sys/kernel/debug/tpmi-<n>/plr/domain<m>/status
$ cat /sys/kernel/debug/tpmi-<n>/plr/domain<m>/status
cpus none
cpu0 none
cpu1 none
...
---
 drivers/platform/x86/intel/plr_tpmi.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/platform/x86/intel/plr_tpmi.c b/drivers/platform/x86/intel/plr_tpmi.c
index 58132da47745..05727169f49c 100644
--- a/drivers/platform/x86/intel/plr_tpmi.c
+++ b/drivers/platform/x86/intel/plr_tpmi.c
@@ -316,7 +316,7 @@ static int intel_plr_probe(struct auxiliary_device *auxdev, const struct auxilia
 		snprintf(name, sizeof(name), "domain%d", i);
 
 		dentry = debugfs_create_dir(name, plr->dbgfs_dir);
-		debugfs_create_file("status", 0444, dentry, &plr->die_info[i],
+		debugfs_create_file("status", 0644, dentry, &plr->die_info[i],
 				    &plr_status_fops);
 	}
 

---
base-commit: 63804fed149a6750ffd28610c5c1c98cce6bd377
change-id: 20260127-plr-debugfs-write-0f47092b3af2

Best regards,
-- 
Ricardo Neri <ricardo.neri-calderon@...ux.intel.com>