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Tue, 10 Mar 2026 11:37:38 -0700 (PDT) Received: from google.com ([2a00:79e0:2ebe:9:5df8:fa34:6102:3b03]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-2be4f96f64dsm14294515eec.27.2026.03.10.11.37.36 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 10 Mar 2026 11:37:37 -0700 (PDT) Date: Tue, 10 Mar 2026 18:37:34 +0000 From: Dmitry Torokhov To: Andy Shevchenko Cc: Hugo Villeneuve , robin@protonic.nl, andy@kernel.org, geert@linux-m68k.org, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, hvilleneuve@dimonoff.com, mkorpershoek@kernel.org, matthias.bgg@gmail.com, angelogioacchino.delregno@collabora.com, lee@kernel.org, alexander.sverdlin@gmail.com, marek.vasut@gmail.com, akurz@blala.de, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-input@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org Subject: Re: [PATCH v4 4/4] Input: charlieplex_keypad: add GPIO charlieplex keypad Message-ID: References: <20260305192101.2125660-1-hugo@hugovil.com> <20260305192101.2125660-5-hugo@hugovil.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260310_113739_950573_C9BB7E1E X-CRM114-Status: GOOD ( 14.84 ) 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: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Fri, Mar 06, 2026 at 04:21:09PM +0200, Andy Shevchenko wrote: > On Thu, Mar 05, 2026 at 02:20:50PM -0500, Hugo Villeneuve wrote: > > +static void charlieplex_keypad_poll(struct input_dev *input) > > +{ > > + struct charlieplex_keypad *keypad = input_get_drvdata(input); > > > + int oline; > > Why signed? > > > + int code; > > + > > + for (code = 0, oline = 0; oline < keypad->nlines; oline++) { > > Can be like > > code = 0; > for (unsigned int oline = 0; oline < keypad->nlines; oline++) { > > as iterator is not used outside the loop. > > > + DECLARE_BITMAP(values, MATRIX_MAX_ROWS); > > > + int iline; > > Why signed? Does it make any difference given practical limits on nlines? Thanks. -- Dmitry