From patchwork Wed Sep 15 15:58:54 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Miquel Raynal X-Patchwork-Id: 12496515 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 759EBC433EF for ; Wed, 15 Sep 2021 16:00:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5A4656137C for ; Wed, 15 Sep 2021 16:00:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238317AbhIOQBj (ORCPT ); Wed, 15 Sep 2021 12:01:39 -0400 Received: from relay8-d.mail.gandi.net ([217.70.183.201]:54157 "EHLO relay8-d.mail.gandi.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238387AbhIOQBi (ORCPT ); Wed, 15 Sep 2021 12:01:38 -0400 Received: (Authenticated sender: miquel.raynal@bootlin.com) by relay8-d.mail.gandi.net (Postfix) with ESMTPSA id DCAB21BF20D; Wed, 15 Sep 2021 16:00:16 +0000 (UTC) From: Miquel Raynal To: Jonathan Cameron , Lars-Peter Clausen , Peter Meerwald-Stadler , Rob Herring , Dmitry Torokhov , Lee Jones , bcousson@baylibre.com, Tony Lindgren Cc: linux-iio@vger.kernel.org, devicetree@vger.kernel.org, linux-omap@vger.kernel.org, Thomas Petazzoni , Vignesh Raghavendra , Lokesh Vutla , Tero Kristo , Ryan Barnett , Grygorii Strashko , Jason Reeder , Miquel Raynal , Jonathan Cameron Subject: [PATCH v3 33/47] mfd: ti_am335x_tscadc: Add a boolean to clarify the presence of a touchscreen Date: Wed, 15 Sep 2021 17:58:54 +0200 Message-Id: <20210915155908.476767-34-miquel.raynal@bootlin.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20210915155908.476767-1-miquel.raynal@bootlin.com> References: <20210915155908.476767-1-miquel.raynal@bootlin.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-iio@vger.kernel.org Just checking the number of wires will soon not be enough, add a boolean to indicated the actual use or not of the touchscreen. Certain checks only make sense when there is a touchscreen wired. Make these checks explicitly depend on the presence of the touchscreen. Signed-off-by: Miquel Raynal Reviewed-by: Jonathan Cameron --- drivers/mfd/ti_am335x_tscadc.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/drivers/mfd/ti_am335x_tscadc.c b/drivers/mfd/ti_am335x_tscadc.c index a181b5b07012..ab6c0e82d389 100644 --- a/drivers/mfd/ti_am335x_tscadc.c +++ b/drivers/mfd/ti_am335x_tscadc.c @@ -120,6 +120,7 @@ static int ti_tscadc_probe(struct platform_device *pdev) struct mfd_cell *cell; struct property *prop; const __be32 *cur; + bool use_tsc = false; u32 val; int err; int tscmag_wires = 0, adc_channels = 0, cell_idx = 0, total_channels; @@ -143,6 +144,8 @@ static int ti_tscadc_probe(struct platform_device *pdev) of_property_read_u32(node, "ti,wires", &tscmag_wires); of_property_read_u32(node, "ti,coordiante-readouts", &readouts); of_node_put(node); + if (tscmag_wires) + use_tsc = true; node = of_get_child_by_name(pdev->dev.of_node, "adc"); of_property_for_each_u32(node, "ti,adc-channels", prop, cur, val) { @@ -168,7 +171,7 @@ static int ti_tscadc_probe(struct platform_device *pdev) return -EINVAL; } - if (readouts * 2 + 2 + adc_channels > 16) { + if (use_tsc && (readouts * 2 + 2 + adc_channels > 16)) { dev_err(&pdev->dev, "Too many step configurations requested\n"); return -EINVAL; } @@ -223,7 +226,7 @@ static int ti_tscadc_probe(struct platform_device *pdev) * added manually when timely. */ tscadc->ctrl = CNTRLREG_TSC_STEPCONFIGWRT | CNTRLREG_STEPID; - if (tscmag_wires > 0) { + if (use_tsc) { tscadc->ctrl |= CNTRLREG_TSC_ENB; if (tscmag_wires == 5) tscadc->ctrl |= CNTRLREG_TSC_5WIRE;