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[2003:f6:5f19:a904:2cc2:680c:1f1b:f2f5]) by smtp.gmail.com with UTF8SMTPSA id 5b1f17b1804b1-49cee5d476esm536676275e9.1.2026.09.08.09.53.50 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 08 Sep 2026 09:53:51 -0700 (PDT) From: =?UTF-8?q?Uwe=20Kleine-K=C3=B6nig?= To: linux-pwm@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Lee Jones , mfd@lists.linux.dev, Manush Prajwal Subject: [PATCH] pwm: lp3943: Mark parent device's platform data as const Date: Tue, 8 Sep 2026 18:53:41 +0200 Message-ID: <20260908165341.1423611-2-u.kleine-koenig@baylibre.com> X-Mailer: git-send-email 2.47.3 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" X-Developer-Signature: v=1; a=openpgp-sha256; l=1607; i=u.kleine-koenig@baylibre.com; h=from:subject; bh=9M7weo/ro39rmyV3qc6k67t2ckADpSAmD5qUSxEkVV0=; b=owEBbQGS/pANAwAKAY+A+1h9Ev5OAcsmYgBqoD2VLnWy5R8B5NkHwHSMkn0/k3VEl+14/KK+G 694a8OVKSaJATMEAAEKAB0WIQQ/gaxpOnoeWYmt/tOPgPtYfRL+TgUCaqA9lQAKCRCPgPtYfRL+ TnkDB/9+HZE7ZVJbhQULxt24ztlbksvRvJrzMvU3jnHIoTQ1Fhlcty9R37MkMJcuhFjDr3crDB1 Tt/UNPv+m2EXBZSS8iNvzuhgCEW45745F/EOetjt6VezzjdDf6West9mFHQ9JzdOViL5rScuzlC Y5RzXDvHHAQF3HJbel4MUyZlDyFNVlHjBuiPt0aS10/S1tsjjfKLn6YNuzs5fToCnan5TEX86aQ vPRPVTtAaSG7WJhc+htDPSactsXYa8TG5dVtXTZCClQdIofqOm2x5bapTIe+npYFrWgg5ZUOm8j Y1EN8uLSNFXOzwuOcj5aCOvSQGEaAqUAy9ShNRY4rKKTrRrh X-Developer-Key: i=u.kleine-koenig@baylibre.com; a=openpgp; fpr=0D2511F322BFAB1C1580266BE2DCDD9132669BD6 Content-Transfer-Encoding: quoted-printable Platform data should never get modified by a driver. So add a respective `const` which makes it explicit that the pwm-lp3943 driver indeed doesn't modify platform data. Signed-off-by: Uwe Kleine-K=C3=B6nig --- Hello, I found this patch opportunity while reviewing another patch to this driver[1]. A possible followup is to mark struct lp3943::pdata also as const. I made a note to address at a later point (i.e. when the mfd tree contains this patch). Best regards Uwe [1] https://lore.kernel.org/linux-pwm/6a9d5187.d63de05c.175391.a17c@mx.goog= le.com drivers/pwm/pwm-lp3943.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/pwm/pwm-lp3943.c b/drivers/pwm/pwm-lp3943.c index 10537e74be28..0fde89018d2a 100644 --- a/drivers/pwm/pwm-lp3943.c +++ b/drivers/pwm/pwm-lp3943.c @@ -21,7 +21,7 @@ =20 struct lp3943_pwm { struct lp3943 *lp3943; - struct lp3943_platform_data *pdata; + const struct lp3943_platform_data *pdata; struct lp3943_pwm_map pwm_map[LP3943_NUM_PWMS]; }; =20 @@ -33,7 +33,7 @@ static inline struct lp3943_pwm *to_lp3943_pwm(struct pwm= _chip *chip) static struct lp3943_pwm_map * lp3943_pwm_request_map(struct lp3943_pwm *lp3943_pwm, int hwpwm) { - struct lp3943_platform_data *pdata =3D lp3943_pwm->pdata; + const struct lp3943_platform_data *pdata =3D lp3943_pwm->pdata; struct lp3943 *lp3943 =3D lp3943_pwm->lp3943; struct lp3943_pwm_map *pwm_map =3D &lp3943_pwm->pwm_map[hwpwm]; int i, offset; base-commit: cee9395acd8043be0644b25c34bfa86623f2b935 --=20 2.55.0.11.g153666a7d9bb