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Sun, 22 May 2022 21:33:56 -0700 (PDT) Date: Sun, 22 May 2022 21:33:54 -0700 From: Dmitry Torokhov To: AngeloGioacchino Del Regno Cc: matthias.bgg@gmail.com, mkorpershoek@baylibre.com, linux-input@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 1/5] Input: mtk-pmic-keys - Add kerneldoc to driver structures Message-ID: References: <20220520125132.229191-1-angelogioacchino.delregno@collabora.com> <20220520125132.229191-2-angelogioacchino.delregno@collabora.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20220520125132.229191-2-angelogioacchino.delregno@collabora.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220523_053603_795749_0899D9BD X-CRM114-Status: GOOD ( 24.62 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hi AngeloGioacchino, On Fri, May 20, 2022 at 02:51:28PM +0200, AngeloGioacchino Del Regno wrote: > To enhance human readability, add kerneldoc to all driver structs. I am doubtful that this is useful. The reason is that I believe kerneldoc format is only useful for documenting cross-subsystem APIs. Kerneldoc for driver-private data and functions simply pollutes API docs. > > Signed-off-by: AngeloGioacchino Del Regno > --- > drivers/input/keyboard/mtk-pmic-keys.c | 30 +++++++++++++++++++++++++- > 1 file changed, 29 insertions(+), 1 deletion(-) > > diff --git a/drivers/input/keyboard/mtk-pmic-keys.c b/drivers/input/keyboard/mtk-pmic-keys.c > index c31ab4368388..8e4fa7cd16e6 100644 > --- a/drivers/input/keyboard/mtk-pmic-keys.c > +++ b/drivers/input/keyboard/mtk-pmic-keys.c > @@ -34,6 +34,13 @@ > #define MTK_PMIC_HOMEKEY_INDEX 1 > #define MTK_PMIC_MAX_KEY_COUNT 2 > > +/** > + * struct mtk_pmic_keys_regs - PMIC keys per-key registers > + * @deb_reg: Debounced key status register > + * @deb_mask: Bitmask of this key in status register > + * @intsel_reg: Interrupt selector register > + * @intsel_mask: Bitmask of this key in interrupt selector > + */ > struct mtk_pmic_keys_regs { > u32 deb_reg; > u32 deb_mask; > @@ -50,6 +57,11 @@ struct mtk_pmic_keys_regs { > .intsel_mask = _intsel_mask, \ > } > > +/** > + * struct mtk_pmic_regs - PMIC Keys registers > + * @keys_regs: Specific key registers This new description of the structure and of the keys_regs does not add any information for me. > + * @pmic_rst_reg: PMIC Keys reset register > + */ > struct mtk_pmic_regs { > const struct mtk_pmic_keys_regs keys_regs[MTK_PMIC_MAX_KEY_COUNT]; > u32 pmic_rst_reg; > @@ -85,15 +97,31 @@ static const struct mtk_pmic_regs mt6358_regs = { > .pmic_rst_reg = MT6358_TOP_RST_MISC, > }; > > +/** > + * struct mtk_pmic_keys_info - PMIC Keys per-key params > + * @keys: Pointer to main driver structure That is obvious from the field definition. > + * @regs: Register offsets/masks for this key Ditto. > + * @keycode: Key code for this key Yep. > + * @irq: Keypress or press/release interrupt > + * @irq_r: Key release interrupt (optional) > + * @wakeup: Indicates whether to use this key as a wakeup source > + */ > struct mtk_pmic_keys_info { > struct mtk_pmic_keys *keys; > const struct mtk_pmic_keys_regs *regs; > unsigned int keycode; > int irq; > - int irq_r; /* optional: release irq if different */ > + int irq_r; > bool wakeup:1; > }; > > +/** > + * struct mtk_pmic_keys - Main driver structure > + * @input_dev: Input device pointer I do not find this helpful. > + * @dev: Device pointer And neither this. > + * @regmap: Regmap handle Nor this. > + * @keys: Per-key parameters > + */ > struct mtk_pmic_keys { > struct input_dev *input_dev; > struct device *dev; > -- > 2.35.1 > In the end we ended up with something that now has a chance of introducing warning when someone changes code, for very little benefit, if any at all. For driver-private data and functions we should rely on expressive variable and function names and only use comments for something that might be unclear or requires additional qualification. Thanks. -- Dmitry _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel