[PATCH AUTOSEL 6.17-5.4] mfd: stmpe-i2c: Add missing MODULE_LICENSE

[Sasha Levin]

From: Alexander Stein <alexander.stein at ew.tq-group.com>

[ Upstream commit 00ea54f058cd4cb082302fe598cfe148e0aadf94 ]

This driver is licensed GPL-2.0-only, so add the corresponding module flag.

Signed-off-by: Alexander Stein <alexander.stein at ew.tq-group.com>
Link: https://lore.kernel.org/r/20250725071153.338912-3-alexander.stein@ew.tq-group.com
Signed-off-by: Lee Jones <lee at kernel.org>
Signed-off-by: Sasha Levin <sashal at kernel.org>
---

LLM Generated explanations, may be completely bogus:

YES

**What Changed**
- Adds missing module license declaration: `MODULE_LICENSE("GPL");` in
  drivers/mfd/stmpe-i2c.c:129.

**Why It Matters**
- Without a `MODULE_LICENSE`, modules are treated as non‑GPL compatible,
  which taints the kernel and blocks access to GPL‑only exports:
  - License compatibility check: include/linux/license.h:5 treats
    `"GPL"` as GPL‑compatible.
  - Taint on unknown/non‑GPL licenses: kernel/module/main.c:1742
    triggers `TAINT_PROPRIETARY_MODULE` when license isn’t
    GPL‑compatible.
- The driver carries the SPDX header `GPL-2.0-only`, so the module flag
  aligns metadata with the actual license.
- Avoids user‑visible nuisance: dmesg warning and kernel taint on load
  for this module when built as a module.

**Scope and Risk**
- One-line metadata-only change in a single file; no functional or
  architectural changes.
- Very low regression risk; does not modify probe/remove paths or data
  flows.

**Context and History**
- The driver is modular-capable: `config STMPE_I2C` is `tristate`
  (drivers/mfd/Kconfig:1600), so a module license tag is appropriate.
- Commit 9e646615df195 (2023) removed `MODULE_LICENSE` under the
  assumption the object was non‑modular, which was incorrect for this
  driver and led to the current regression (missing license).
- This commit corrects that regression.
- Affected stable series: In this tree, v6.6, v6.8, and v6.10 lack the
  license line (module taints if built as a module), while v6.1 still
  had `MODULE_LICENSE("GPL v2")`. Backport is beneficial to stable lines
  where the line is missing.

**Stable Criteria Fit**
- Fixes a real, user-visible regression (kernel taint and GPL‑only
  symbol ineligibility) with a minimal, contained change.
- No new features or API changes; confined to MFD stmpe I2C driver
  metadata.
- Clear alignment with stable rules for small, low-risk fixes.

 drivers/mfd/stmpe-i2c.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/mfd/stmpe-i2c.c b/drivers/mfd/stmpe-i2c.c
index fe018bedab983..7e2ca39758825 100644
--- a/drivers/mfd/stmpe-i2c.c
+++ b/drivers/mfd/stmpe-i2c.c
@@ -137,3 +137,4 @@ module_exit(stmpe_exit);
 
 MODULE_DESCRIPTION("STMPE MFD I2C Interface Driver");
 MODULE_AUTHOR("Rabin Vincent <rabin.vincent at stericsson.com>");
+MODULE_LICENSE("GPL");
-- 
2.51.0