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Wed, 27 May 2026 15:39:06 -0700 (PDT) Received: from ryzen ([2601:644:8000:5b5d:7285:c2ff:fe45:8a32]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2beb56b51aesm211397955ad.19.2026.05.27.15.39.05 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 27 May 2026 15:39:06 -0700 (PDT) From: Rosen Penev To: linux-input@vger.kernel.org Cc: Dmitry Torokhov , Matthias Brugger , AngeloGioacchino Del Regno , linux-kernel@vger.kernel.org (open list:ARM/Mediatek SoC support), linux-arm-kernel@lists.infradead.org (moderated list:ARM/Mediatek SoC support), linux-mediatek@lists.infradead.org (moderated list:ARM/Mediatek SoC support) Subject: [PATCH] Input: mtk-pmic-keys: Use flexible array member for keys Date: Wed, 27 May 2026 15:38:49 -0700 Message-ID: <20260527223849.25139-1-rosenp@gmail.com> X-Mailer: git-send-email 2.54.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Convert the fixed-size keys array to a flexible array member and use struct_size() for allocation. Move the key count validation before allocation and use for_each_available_child_of_node_scoped() to iterate only over available child nodes as the allocation uses of_get_available_child_count. Also use a key variable in the loop for clarity. Use of_device_get_match_data() to fetch the PMIC key register data directly instead of open-coding an of_match_device() lookup. This also lets the driver drop the of_device.h include. Remove platform_set_drvdata. Unused anywhere. Assisted-by: OpenCode:BigPickle Signed-off-by: Rosen Penev --- drivers/input/keyboard/mtk-pmic-keys.c | 55 ++++++++++++-------------- 1 file changed, 25 insertions(+), 30 deletions(-) diff --git a/drivers/input/keyboard/mtk-pmic-keys.c b/drivers/input/keyboar= d/mtk-pmic-keys.c index c78d9f6d97c4..5b8650f46105 100644 --- a/drivers/input/keyboard/mtk-pmic-keys.c +++ b/drivers/input/keyboard/mtk-pmic-keys.c @@ -16,7 +16,6 @@ #include #include #include -#include #include #include #include @@ -147,7 +146,7 @@ struct mtk_pmic_keys { struct input_dev *input_dev; struct device *dev; struct regmap *regmap; - struct mtk_pmic_keys_info keys[MTK_PMIC_MAX_KEY_COUNT]; + struct mtk_pmic_keys_info keys[]; }; =20 enum mtk_pmic_keys_lp_mode { @@ -332,17 +331,25 @@ static int mtk_pmic_keys_probe(struct platform_device= *pdev) static const char *const irqnames_r[] =3D { "powerkey_r", "homekey_r" }; struct mtk_pmic_keys *keys; const struct mtk_pmic_regs *mtk_pmic_regs; + struct mtk_pmic_keys_info *key; struct input_dev *input_dev; - const struct of_device_id *of_id =3D - of_match_device(of_mtk_pmic_keys_match_tbl, &pdev->dev); =20 - keys =3D devm_kzalloc(&pdev->dev, sizeof(*keys), GFP_KERNEL); + keycount =3D of_get_available_child_count(node); + if (keycount > MTK_PMIC_MAX_KEY_COUNT || + keycount > ARRAY_SIZE(irqnames)) { + dev_err(&pdev->dev, "too many keys defined (%d)\n", keycount); + return -EINVAL; + } + + keys =3D devm_kzalloc(&pdev->dev, struct_size(keys, keys, keycount), GFP_= KERNEL); if (!keys) return -ENOMEM; =20 keys->dev =3D &pdev->dev; keys->regmap =3D pmic_chip->regmap; - mtk_pmic_regs =3D of_id->data; + mtk_pmic_regs =3D of_device_get_match_data(&pdev->dev); + if (!mtk_pmic_regs) + return -EINVAL; =20 keys->input_dev =3D input_dev =3D devm_input_allocate_device(keys->dev); if (!input_dev) { @@ -356,31 +363,21 @@ static int mtk_pmic_keys_probe(struct platform_device= *pdev) input_dev->id.product =3D 0x0001; input_dev->id.version =3D 0x0001; =20 - keycount =3D of_get_available_child_count(node); - if (keycount > MTK_PMIC_MAX_KEY_COUNT || - keycount > ARRAY_SIZE(irqnames)) { - dev_err(keys->dev, "too many keys defined (%d)\n", keycount); - return -EINVAL; - } + for_each_available_child_of_node_scoped(node, child) { + key =3D &keys->keys[index]; + key->regs =3D &mtk_pmic_regs->keys_regs[index]; =20 - for_each_child_of_node_scoped(node, child) { - keys->keys[index].regs =3D &mtk_pmic_regs->keys_regs[index]; - - keys->keys[index].irq =3D - platform_get_irq_byname(pdev, irqnames[index]); - if (keys->keys[index].irq < 0) - return keys->keys[index].irq; + key->irq =3D platform_get_irq_byname(pdev, irqnames[index]); + if (key->irq < 0) + return key->irq; =20 if (mtk_pmic_regs->key_release_irq) { - keys->keys[index].irq_r =3D platform_get_irq_byname(pdev, - irqnames_r[index]); - - if (keys->keys[index].irq_r < 0) - return keys->keys[index].irq_r; + key->irq_r =3D platform_get_irq_byname(pdev, irqnames_r[index]); + if (key->irq_r < 0) + return key->irq_r; } =20 - error =3D of_property_read_u32(child, - "linux,keycodes", &keys->keys[index].keycode); + error =3D of_property_read_u32(child, "linux,keycodes", &key->keycode); if (error) { dev_err(keys->dev, "failed to read key:%d linux,keycode property: %d\n", @@ -389,9 +386,9 @@ static int mtk_pmic_keys_probe(struct platform_device *= pdev) } =20 if (of_property_read_bool(child, "wakeup-source")) - keys->keys[index].wakeup =3D true; + key->wakeup =3D true; =20 - error =3D mtk_pmic_key_setup(keys, &keys->keys[index]); + error =3D mtk_pmic_key_setup(keys, key); if (error) return error; =20 @@ -407,8 +404,6 @@ static int mtk_pmic_keys_probe(struct platform_device *= pdev) =20 mtk_pmic_keys_lp_reset_setup(keys, mtk_pmic_regs); =20 - platform_set_drvdata(pdev, keys); - return 0; } =20 --=20 2.54.0