From patchwork Fri Jan 8 19:23:36 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stephan Gerhold X-Patchwork-Id: 359891 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=-16.8 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 C1CC7C433DB for ; Fri, 8 Jan 2021 19:27:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 82B9423AAC for ; Fri, 8 Jan 2021 19:27:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728823AbhAHT0x (ORCPT ); Fri, 8 Jan 2021 14:26:53 -0500 Received: from mo4-p01-ob.smtp.rzone.de ([85.215.255.51]:10294 "EHLO mo4-p01-ob.smtp.rzone.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728647AbhAHT0x (ORCPT ); Fri, 8 Jan 2021 14:26:53 -0500 X-RZG-AUTH: ":P3gBZUipdd93FF5ZZvYFPugejmSTVR2nRPhVORvLd4SsytBXS7IYBkLahKxB6m6Efvw=" X-RZG-CLASS-ID: mo00 Received: from droid.. by smtp.strato.de (RZmta 47.12.1 DYNA|AUTH) with ESMTPSA id R0a218x08JNkLk1 (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256 bits)) (Client did not present a certificate); Fri, 8 Jan 2021 20:23:46 +0100 (CET) From: Stephan Gerhold To: Dmitry Torokhov Cc: linux-input@vger.kernel.org, Rob Herring , devicetree@vger.kernel.org, Simon Budig , Andy Shevchenko , Stephan Gerhold , Ondrej Jirman , Marco Felsch Subject: [PATCH 1/2] dt-bindings: input: touchscreen: edt-ft5x06: add iovcc-supply Date: Fri, 8 Jan 2021 20:23:36 +0100 Message-Id: <20210108192337.563679-1-stephan@gerhold.net> X-Mailer: git-send-email 2.30.0 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org At the moment, the edt-ft5x06 driver can control a single regulator ("vcc"). However, some FocalTech touch controllers have an additional IOVCC pin that should be supplied with the digital I/O voltage. The I/O voltage might be provided by another regulator that should also be kept on. Otherwise, the touchscreen can randomly stop functioning if the regulator is turned off because no other components still require it. Document (optional) support for controlling the regulator for IOVCC using "iovcc-supply". Cc: Ondrej Jirman Cc: Marco Felsch Signed-off-by: Stephan Gerhold Acked-by: Rob Herring --- .../devicetree/bindings/input/touchscreen/edt-ft5x06.yaml | 1 + 1 file changed, 1 insertion(+) diff --git a/Documentation/devicetree/bindings/input/touchscreen/edt-ft5x06.yaml b/Documentation/devicetree/bindings/input/touchscreen/edt-ft5x06.yaml index bfc3a8b5e118..2e8da7470513 100644 --- a/Documentation/devicetree/bindings/input/touchscreen/edt-ft5x06.yaml +++ b/Documentation/devicetree/bindings/input/touchscreen/edt-ft5x06.yaml @@ -56,6 +56,7 @@ properties: wakeup-source: true vcc-supply: true + iovcc-supply: true gain: description: Allows setting the sensitivity in the range from 0 to 31. From patchwork Fri Jan 8 19:23:37 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stephan Gerhold X-Patchwork-Id: 359191 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=-16.8 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 E0D55C433E0 for ; Fri, 8 Jan 2021 19:27:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A001B23AC6 for ; Fri, 8 Jan 2021 19:27:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728822AbhAHT07 (ORCPT ); Fri, 8 Jan 2021 14:26:59 -0500 Received: from mo4-p01-ob.smtp.rzone.de ([85.215.255.52]:35435 "EHLO mo4-p01-ob.smtp.rzone.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728647AbhAHT06 (ORCPT ); Fri, 8 Jan 2021 14:26:58 -0500 X-RZG-AUTH: ":P3gBZUipdd93FF5ZZvYFPugejmSTVR2nRPhVORvLd4SsytBXS7IYBkLahKxB6m6Efvw=" X-RZG-CLASS-ID: mo00 Received: from droid.. by smtp.strato.de (RZmta 47.12.1 DYNA|AUTH) with ESMTPSA id R0a218x08JNqLk8 (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256 bits)) (Client did not present a certificate); Fri, 8 Jan 2021 20:23:52 +0100 (CET) From: Stephan Gerhold To: Dmitry Torokhov Cc: linux-input@vger.kernel.org, Rob Herring , devicetree@vger.kernel.org, Simon Budig , Andy Shevchenko , Stephan Gerhold , Ondrej Jirman , Marco Felsch Subject: [PATCH 2/2] Input: edt-ft5x06 - add support for iovcc-supply Date: Fri, 8 Jan 2021 20:23:37 +0100 Message-Id: <20210108192337.563679-2-stephan@gerhold.net> X-Mailer: git-send-email 2.30.0 In-Reply-To: <20210108192337.563679-1-stephan@gerhold.net> References: <20210108192337.563679-1-stephan@gerhold.net> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org At the moment, the edt-ft5x06 driver can control a single regulator ("vcc"). However, some FocalTech touch controllers have an additional IOVCC pin that should be supplied with the digital I/O voltage. The I/O voltage might be provided by another regulator that should also be kept on. Otherwise, the touchscreen can randomly stop functioning if the regulator is turned off because no other components still require it. Implement (optional) support for also enabling an "iovcc-supply". IOVCC is needed whenever VCC is needed, so switch to the regulator bulk APIs to request/enable/disable both when appropriate. Cc: Ondrej Jirman Cc: Marco Felsch Signed-off-by: Stephan Gerhold --- drivers/input/touchscreen/edt-ft5x06.c | 35 ++++++++++++++------------ 1 file changed, 19 insertions(+), 16 deletions(-) diff --git a/drivers/input/touchscreen/edt-ft5x06.c b/drivers/input/touchscreen/edt-ft5x06.c index 2eefbc2485bc..bf2e208112fe 100644 --- a/drivers/input/touchscreen/edt-ft5x06.c +++ b/drivers/input/touchscreen/edt-ft5x06.c @@ -103,7 +103,7 @@ struct edt_ft5x06_ts_data { struct touchscreen_properties prop; u16 num_x; u16 num_y; - struct regulator *vcc; + struct regulator_bulk_data regulators[2]; struct gpio_desc *reset_gpio; struct gpio_desc *wake_gpio; @@ -1066,7 +1066,7 @@ static void edt_ft5x06_disable_regulator(void *arg) { struct edt_ft5x06_ts_data *data = arg; - regulator_disable(data->vcc); + regulator_bulk_disable(ARRAY_SIZE(data->regulators), data->regulators); } static int edt_ft5x06_ts_probe(struct i2c_client *client, @@ -1098,18 +1098,19 @@ static int edt_ft5x06_ts_probe(struct i2c_client *client, tsdata->max_support_points = chip_data->max_support_points; - tsdata->vcc = devm_regulator_get(&client->dev, "vcc"); - if (IS_ERR(tsdata->vcc)) { - error = PTR_ERR(tsdata->vcc); - if (error != -EPROBE_DEFER) - dev_err(&client->dev, - "failed to request regulator: %d\n", error); - return error; - } + tsdata->regulators[0].supply = "vcc"; + tsdata->regulators[1].supply = "iovcc"; + error = devm_regulator_bulk_get(&client->dev, + ARRAY_SIZE(tsdata->regulators), + tsdata->regulators); + if (error) + return dev_err_probe(&client->dev, error, + "failed to request regulators\n"); - error = regulator_enable(tsdata->vcc); + error = regulator_bulk_enable(ARRAY_SIZE(tsdata->regulators), + tsdata->regulators); if (error < 0) { - dev_err(&client->dev, "failed to enable vcc: %d\n", error); + dev_err(&client->dev, "failed to enable regulators: %d\n", error); return error; } @@ -1286,9 +1287,10 @@ static int __maybe_unused edt_ft5x06_ts_suspend(struct device *dev) gpiod_set_value_cansleep(reset_gpio, 1); usleep_range(1000, 2000); - ret = regulator_disable(tsdata->vcc); + ret = regulator_bulk_disable(ARRAY_SIZE(tsdata->regulators), + tsdata->regulators); if (ret) - dev_warn(dev, "Failed to disable vcc\n"); + dev_warn(dev, "Failed to disable regulators\n"); return 0; } @@ -1319,9 +1321,10 @@ static int __maybe_unused edt_ft5x06_ts_resume(struct device *dev) gpiod_set_value_cansleep(reset_gpio, 1); usleep_range(5000, 6000); - ret = regulator_enable(tsdata->vcc); + ret = regulator_bulk_enable(ARRAY_SIZE(tsdata->regulators), + tsdata->regulators); if (ret) { - dev_err(dev, "Failed to enable vcc\n"); + dev_err(dev, "Failed to enable regulators\n"); return ret; }