From patchwork Fri Feb 4 22:55:59 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Anjelique Melendez X-Patchwork-Id: 12735794 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 15DB2C433FE for ; Fri, 4 Feb 2022 22:56:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1355995AbiBDW44 (ORCPT ); Fri, 4 Feb 2022 17:56:56 -0500 Received: from alexa-out.qualcomm.com ([129.46.98.28]:38231 "EHLO alexa-out.qualcomm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S241319AbiBDW4z (ORCPT ); Fri, 4 Feb 2022 17:56:55 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; i=@quicinc.com; q=dns/txt; s=qcdkim; t=1644015416; x=1675551416; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=AnJQX6Hs108noH/jyS1i5d0WXn1WwhOydCmt3EILaKM=; b=NobyDhOV/VPHuCzB09Jriu3H5JpWAqNqSnJJc72I+HQ05Ao7KBEFTLZm WfyX0ePRmMiV3rIu5Pop6KM5HGYIaEd5q+3y+uA+OiNOHAzm3xTmQwAtZ c7nRCU1x0u4L4WmAnjUWiP8jqinsQDKOxLpa2EJvyVh3qdTZSD/ZoOp1g 4=; Received: from ironmsg07-lv.qualcomm.com ([10.47.202.151]) by alexa-out.qualcomm.com with ESMTP; 04 Feb 2022 14:56:55 -0800 X-QCInternal: smtphost Received: from nasanex01c.na.qualcomm.com ([10.47.97.222]) by ironmsg07-lv.qualcomm.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 04 Feb 2022 14:56:40 -0800 Received: from nalasex01a.na.qualcomm.com (10.47.209.196) by nasanex01c.na.qualcomm.com (10.47.97.222) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.922.19; Fri, 4 Feb 2022 14:56:39 -0800 Received: from hu-amelende-lv.qualcomm.com (10.49.16.6) by nalasex01a.na.qualcomm.com (10.47.209.196) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.922.19; Fri, 4 Feb 2022 14:56:39 -0800 From: Anjelique Melendez To: CC: , , , , , , , Anjelique Melendez Subject: [PATCH v4 1/4] input: misc: pm8941-pwrkey: fix error message Date: Fri, 4 Feb 2022 14:55:59 -0800 Message-ID: <20220204225600.1663-2-quic_amelende@quicinc.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220204225600.1663-1-quic_amelende@quicinc.com> References: <20220204225600.1663-1-quic_amelende@quicinc.com> MIME-Version: 1.0 X-Originating-IP: [10.49.16.6] X-ClientProxiedBy: nalasex01b.na.qualcomm.com (10.47.209.197) To nalasex01a.na.qualcomm.com (10.47.209.196) Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org Currently, error message reads "failed to set debounce". However, code is attempting to read revision not set debounce. Fix this. Reviewed-by: Stephen Boyd Signed-off-by: Anjelique Melendez --- drivers/input/misc/pm8941-pwrkey.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/input/misc/pm8941-pwrkey.c b/drivers/input/misc/pm8941-pwrkey.c index 33609603245d..e0240db12d4f 100644 --- a/drivers/input/misc/pm8941-pwrkey.c +++ b/drivers/input/misc/pm8941-pwrkey.c @@ -217,7 +217,7 @@ static int pm8941_pwrkey_probe(struct platform_device *pdev) error = regmap_read(pwrkey->regmap, pwrkey->baseaddr + PON_REV2, &pwrkey->revision); if (error) { - dev_err(&pdev->dev, "failed to set debounce: %d\n", error); + dev_err(&pdev->dev, "failed to read revision: %d\n", error); return error; } From patchwork Fri Feb 4 22:56:01 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Anjelique Melendez X-Patchwork-Id: 12735795 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id BAA2EC433FE for ; Fri, 4 Feb 2022 22:57:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1356193AbiBDW5V (ORCPT ); Fri, 4 Feb 2022 17:57:21 -0500 Received: from alexa-out-sd-01.qualcomm.com ([199.106.114.38]:54070 "EHLO alexa-out-sd-01.qualcomm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1356144AbiBDW5U (ORCPT ); Fri, 4 Feb 2022 17:57:20 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; i=@quicinc.com; q=dns/txt; s=qcdkim; t=1644015440; x=1675551440; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=U0dAnVDtoFN/JgMg2ZIfmtBIm3Um1vEYmHj9oeaYZdQ=; b=gAFVULIP4WN7Y/WE0+4DHKpIF8222wjj77LNW3/cp1yuLUpDIr5JecX+ MoZlDz46sSVKRiisKgJY8NH4UyIyuC2Y1ffA4gsLfOKXPGoc2XYPUjlcf KHIxbCZO7QVI0yJ+LKaIPiY0k0wnTdu7kTUC8ns8fqax7bJcggel0v3by k=; Received: from unknown (HELO ironmsg04-sd.qualcomm.com) ([10.53.140.144]) by alexa-out-sd-01.qualcomm.com with ESMTP; 04 Feb 2022 14:57:20 -0800 X-QCInternal: smtphost Received: from nasanex01c.na.qualcomm.com ([10.47.97.222]) by ironmsg04-sd.qualcomm.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 04 Feb 2022 14:57:20 -0800 Received: from nalasex01a.na.qualcomm.com (10.47.209.196) by nasanex01c.na.qualcomm.com (10.47.97.222) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.922.19; Fri, 4 Feb 2022 14:57:19 -0800 Received: from hu-amelende-lv.qualcomm.com (10.49.16.6) by nalasex01a.na.qualcomm.com (10.47.209.196) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.922.19; Fri, 4 Feb 2022 14:57:19 -0800 From: Anjelique Melendez To: CC: , , , , , , , Anjelique Melendez Subject: [PATCH v4 2/4] input: misc: pm8941-pwrkey: add support for PON GEN3 base addresses Date: Fri, 4 Feb 2022 14:56:01 -0800 Message-ID: <20220204225600.1663-3-quic_amelende@quicinc.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220204225600.1663-1-quic_amelende@quicinc.com> References: <20220204225600.1663-1-quic_amelende@quicinc.com> MIME-Version: 1.0 X-Originating-IP: [10.49.16.6] X-ClientProxiedBy: nalasex01b.na.qualcomm.com (10.47.209.197) To nalasex01a.na.qualcomm.com (10.47.209.196) Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org Currently, PON address is read from the "reg" property. For PON GEN3, which starts with PMK8350, the "reg" property will have both the PON HLOS and PON PBS addesses defined. Add support so that all PON generations can be configured. Reviewed-by: Stephen Boyd Signed-off-by: Anjelique Melendez --- drivers/input/misc/pm8941-pwrkey.c | 31 +++++++++++++++++++++++------- 1 file changed, 24 insertions(+), 7 deletions(-) diff --git a/drivers/input/misc/pm8941-pwrkey.c b/drivers/input/misc/pm8941-pwrkey.c index e0240db12d4f..43106e4cfd23 100644 --- a/drivers/input/misc/pm8941-pwrkey.c +++ b/drivers/input/misc/pm8941-pwrkey.c @@ -12,6 +12,7 @@ #include #include #include +#include #include #include #include @@ -44,6 +45,7 @@ struct pm8941_data { unsigned int status_bit; bool supports_ps_hold_poff_config; bool supports_debounce_config; + bool has_pon_pbs; const char *name; const char *phys; }; @@ -52,6 +54,7 @@ struct pm8941_pwrkey { struct device *dev; int irq; u32 baseaddr; + u32 pon_pbs_baseaddr; struct regmap *regmap; struct input_dev *input; @@ -167,6 +170,8 @@ static int pm8941_pwrkey_probe(struct platform_device *pdev) struct pm8941_pwrkey *pwrkey; bool pull_up; struct device *parent; + struct device_node *regmap_node; + const __be32 *addr; u32 req_delay; int error; @@ -188,8 +193,10 @@ static int pm8941_pwrkey_probe(struct platform_device *pdev) pwrkey->data = of_device_get_match_data(&pdev->dev); parent = pdev->dev.parent; + regmap_node = pdev->dev.of_node; pwrkey->regmap = dev_get_regmap(parent, NULL); if (!pwrkey->regmap) { + regmap_node = parent->of_node; /* * We failed to get regmap for parent. Let's see if we are * a child of pon node and read regmap and reg from its @@ -200,15 +207,21 @@ static int pm8941_pwrkey_probe(struct platform_device *pdev) dev_err(&pdev->dev, "failed to locate regmap\n"); return -ENODEV; } + } - error = of_property_read_u32(parent->of_node, - "reg", &pwrkey->baseaddr); - } else { - error = of_property_read_u32(pdev->dev.of_node, "reg", - &pwrkey->baseaddr); + addr = of_get_address(regmap_node, 0, NULL, NULL); + if (!addr) { + dev_err(&pdev->dev, "reg property missing\n"); + return -EINVAL; + } + pwrkey->baseaddr = be32_to_cpup(addr); + + if (pwrkey->data->has_pon_pbs) { + /* PON_PBS base address is optional */ + addr = of_get_address(regmap_node, 1, NULL, NULL); + if (addr) + pwrkey->pon_pbs_baseaddr = be32_to_cpup(addr); } - if (error) - return error; pwrkey->irq = platform_get_irq(pdev, 0); if (pwrkey->irq < 0) @@ -316,6 +329,7 @@ static const struct pm8941_data pwrkey_data = { .phys = "pm8941_pwrkey/input0", .supports_ps_hold_poff_config = true, .supports_debounce_config = true, + .has_pon_pbs = false, }; static const struct pm8941_data resin_data = { @@ -325,6 +339,7 @@ static const struct pm8941_data resin_data = { .phys = "pm8941_resin/input0", .supports_ps_hold_poff_config = true, .supports_debounce_config = true, + .has_pon_pbs = false, }; static const struct pm8941_data pon_gen3_pwrkey_data = { @@ -333,6 +348,7 @@ static const struct pm8941_data pon_gen3_pwrkey_data = { .phys = "pmic_pwrkey/input0", .supports_ps_hold_poff_config = false, .supports_debounce_config = false, + .has_pon_pbs = true, }; static const struct pm8941_data pon_gen3_resin_data = { @@ -341,6 +357,7 @@ static const struct pm8941_data pon_gen3_resin_data = { .phys = "pmic_resin/input0", .supports_ps_hold_poff_config = false, .supports_debounce_config = false, + .has_pon_pbs = true, }; static const struct of_device_id pm8941_pwr_key_id_table[] = { From patchwork Fri Feb 4 22:56:03 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Anjelique Melendez X-Patchwork-Id: 12735796 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id D136EC433FE for ; Fri, 4 Feb 2022 22:57:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1356452AbiBDW5e (ORCPT ); Fri, 4 Feb 2022 17:57:34 -0500 Received: from alexa-out-sd-02.qualcomm.com ([199.106.114.39]:41602 "EHLO alexa-out-sd-02.qualcomm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1356424AbiBDW5d (ORCPT ); Fri, 4 Feb 2022 17:57:33 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; i=@quicinc.com; q=dns/txt; s=qcdkim; t=1644015453; x=1675551453; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=z8ceRfGThdI/BfT2SzH/oTcuzUVhLdyxuLAQ7myRsD4=; b=PyZkC52qKyatEM4QAwYFf/gYn5iAsFHJUrgnr7e9w0WMQhNGcSNshjCA BuWGQc+4yDl71QI4YRmjeEyiAVulWtLbB7zD7mbyako5rpMGjbqFiUP+x jRbp78UkP2SOUuH9yNhSV8W9EW4c09oaYVBULe8B83Pk14GfrNC8jU/FS U=; Received: from unknown (HELO ironmsg-SD-alpha.qualcomm.com) ([10.53.140.30]) by alexa-out-sd-02.qualcomm.com with ESMTP; 04 Feb 2022 14:57:33 -0800 X-QCInternal: smtphost Received: from nasanex01c.na.qualcomm.com ([10.47.97.222]) by ironmsg-SD-alpha.qualcomm.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 04 Feb 2022 14:57:33 -0800 Received: from nalasex01a.na.qualcomm.com (10.47.209.196) by nasanex01c.na.qualcomm.com (10.47.97.222) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.922.19; Fri, 4 Feb 2022 14:57:32 -0800 Received: from hu-amelende-lv.qualcomm.com (10.49.16.6) by nalasex01a.na.qualcomm.com (10.47.209.196) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.922.19; Fri, 4 Feb 2022 14:57:32 -0800 From: Anjelique Melendez To: CC: , , , , , , , Anjelique Melendez Subject: [PATCH v4 3/4] input: misc: pm8941-pwrkey: add software key press debouncing support Date: Fri, 4 Feb 2022 14:56:03 -0800 Message-ID: <20220204225600.1663-4-quic_amelende@quicinc.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220204225600.1663-1-quic_amelende@quicinc.com> References: <20220204225600.1663-1-quic_amelende@quicinc.com> MIME-Version: 1.0 X-Originating-IP: [10.49.16.6] X-ClientProxiedBy: nalasex01b.na.qualcomm.com (10.47.209.197) To nalasex01a.na.qualcomm.com (10.47.209.196) Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org From: David Collins On certain PMICs, an unexpected assertion of KPDPWR_DEB (the positive logic hardware debounced power key signal) may be seen during the falling edge of KPDPWR_N (i.e. a power key press) when it occurs close to the rising edge of SLEEP_CLK. This then triggers a spurious KPDPWR interrupt. Handle this issue by adding software debouncing support to ignore key events that occur within the hardware debounce delay after the most recent key release event. Signed-off-by: David Collins Signed-off-by: Anjelique Melendez --- drivers/input/misc/pm8941-pwrkey.c | 80 +++++++++++++++++++++++++++--- 1 file changed, 74 insertions(+), 6 deletions(-) diff --git a/drivers/input/misc/pm8941-pwrkey.c b/drivers/input/misc/pm8941-pwrkey.c index 43106e4cfd23..881943ab4d55 100644 --- a/drivers/input/misc/pm8941-pwrkey.c +++ b/drivers/input/misc/pm8941-pwrkey.c @@ -9,6 +9,7 @@ #include #include #include +#include #include #include #include @@ -20,6 +21,16 @@ #define PON_REV2 0x01 +#define PON_SUBTYPE 0x05 + +#define PON_SUBTYPE_PRIMARY 0x01 +#define PON_SUBTYPE_SECONDARY 0x02 +#define PON_SUBTYPE_1REG 0x03 +#define PON_SUBTYPE_GEN2_PRIMARY 0x04 +#define PON_SUBTYPE_GEN2_SECONDARY 0x05 +#define PON_SUBTYPE_GEN3_PBS 0x08 +#define PON_SUBTYPE_GEN3_HLOS 0x09 + #define PON_RT_STS 0x10 #define PON_KPDPWR_N_SET BIT(0) #define PON_RESIN_N_SET BIT(1) @@ -59,9 +70,12 @@ struct pm8941_pwrkey { struct input_dev *input; unsigned int revision; + unsigned int subtype; struct notifier_block reboot_notifier; u32 code; + u32 sw_debounce_time_us; + ktime_t sw_debounce_end_time; const struct pm8941_data *data; }; @@ -128,20 +142,63 @@ static irqreturn_t pm8941_pwrkey_irq(int irq, void *_data) { struct pm8941_pwrkey *pwrkey = _data; unsigned int sts; - int error; + int err; - error = regmap_read(pwrkey->regmap, - pwrkey->baseaddr + PON_RT_STS, &sts); - if (error) + if (pwrkey->sw_debounce_time_us) { + if (ktime_before(ktime_get(), pwrkey->sw_debounce_end_time)) { + dev_dbg(pwrkey->dev, "ignoring key event received before debounce end %llu us\n", + pwrkey->sw_debounce_end_time); + return IRQ_HANDLED; + } + } + + err = regmap_read(pwrkey->regmap, pwrkey->baseaddr + PON_RT_STS, &sts); + if (err) return IRQ_HANDLED; - input_report_key(pwrkey->input, pwrkey->code, - sts & pwrkey->data->status_bit); + sts &= pwrkey->data->status_bit; + + if (pwrkey->sw_debounce_time_us && !sts) + pwrkey->sw_debounce_end_time = ktime_add_us(ktime_get(), + pwrkey->sw_debounce_time_us); + + input_report_key(pwrkey->input, pwrkey->code, sts); input_sync(pwrkey->input); return IRQ_HANDLED; } +static int pm8941_pwrkey_sw_debounce_init(struct pm8941_pwrkey *pwrkey) +{ + unsigned int val, addr, mask; + int error; + + if (pwrkey->data->has_pon_pbs && !pwrkey->pon_pbs_baseaddr) { + dev_err(pwrkey->dev, "PON_PBS address missing, can't read HW debounce time\n"); + return 0; + } + + if (pwrkey->pon_pbs_baseaddr) + addr = pwrkey->pon_pbs_baseaddr + PON_DBC_CTL; + else + addr = pwrkey->baseaddr + PON_DBC_CTL; + error = regmap_read(pwrkey->regmap, addr, &val); + if (error) + return error; + + if (pwrkey->subtype >= PON_SUBTYPE_GEN2_PRIMARY) + mask = 0xf; + else + mask = 0x7; + + pwrkey->sw_debounce_time_us = 2 * USEC_PER_SEC / (1 << (mask - (val & mask))); + + dev_dbg(pwrkey->dev, "SW debounce time = %u us\n", + pwrkey->sw_debounce_time_us); + + return 0; +} + static int __maybe_unused pm8941_pwrkey_suspend(struct device *dev) { struct pm8941_pwrkey *pwrkey = dev_get_drvdata(dev); @@ -234,6 +291,13 @@ static int pm8941_pwrkey_probe(struct platform_device *pdev) return error; } + error = regmap_read(pwrkey->regmap, pwrkey->baseaddr + PON_SUBTYPE, + &pwrkey->subtype); + if (error) { + dev_err(&pdev->dev, "failed to read subtype: %d\n", error); + return error; + } + error = of_property_read_u32(pdev->dev.of_node, "linux,code", &pwrkey->code); if (error) { @@ -268,6 +332,10 @@ static int pm8941_pwrkey_probe(struct platform_device *pdev) } } + error = pm8941_pwrkey_sw_debounce_init(pwrkey); + if (error) + return error; + if (pwrkey->data->pull_up_bit) { error = regmap_update_bits(pwrkey->regmap, pwrkey->baseaddr + PON_PULL_CTL, From patchwork Fri Feb 4 22:56:04 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Anjelique Melendez X-Patchwork-Id: 12735797 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6585CC433EF for ; Fri, 4 Feb 2022 22:57:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1356699AbiBDW5f (ORCPT ); Fri, 4 Feb 2022 17:57:35 -0500 Received: from alexa-out.qualcomm.com ([129.46.98.28]:32505 "EHLO alexa-out.qualcomm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1356551AbiBDW5f (ORCPT ); Fri, 4 Feb 2022 17:57:35 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; i=@quicinc.com; q=dns/txt; s=qcdkim; t=1644015455; x=1675551455; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=Ss1yJ8C2o2JNvk+SxQ1vw9WaY3rA4Jk7i+Ds45rTd/o=; b=ozg4RIcACpBmObsDl69zuqi+FFLiiyJp8dhNymFU0FOpZ+ADDZAgQD0L n7UFRJmEhkHIUZTyVSyUI6K3fXBo268IgwlPIpcG0IWvmLPvIq/0r2yhB 7nYDeM4eSaFFUEl9HKl2HLXzbmkQ8jeeWMmAv/r1UtnJmmdd9sdDrSaFx 0=; Received: from ironmsg-lv-alpha.qualcomm.com ([10.47.202.13]) by alexa-out.qualcomm.com with ESMTP; 04 Feb 2022 14:57:35 -0800 X-QCInternal: smtphost Received: from nasanex01c.na.qualcomm.com ([10.47.97.222]) by ironmsg-lv-alpha.qualcomm.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 04 Feb 2022 14:57:34 -0800 Received: from nalasex01a.na.qualcomm.com (10.47.209.196) by nasanex01c.na.qualcomm.com (10.47.97.222) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.922.19; Fri, 4 Feb 2022 14:57:34 -0800 Received: from hu-amelende-lv.qualcomm.com (10.49.16.6) by nalasex01a.na.qualcomm.com (10.47.209.196) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.922.19; Fri, 4 Feb 2022 14:57:33 -0800 From: Anjelique Melendez To: CC: , , , , , , , Anjelique Melendez Subject: [PATCH v4 4/4] input: misc: pm8941-pwrkey: simulate missed key press events Date: Fri, 4 Feb 2022 14:56:04 -0800 Message-ID: <20220204225600.1663-5-quic_amelende@quicinc.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220204225600.1663-1-quic_amelende@quicinc.com> References: <20220204225600.1663-1-quic_amelende@quicinc.com> MIME-Version: 1.0 X-Originating-IP: [10.49.16.6] X-ClientProxiedBy: nalasex01b.na.qualcomm.com (10.47.209.197) To nalasex01a.na.qualcomm.com (10.47.209.196) Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org From: David Collins The status of the keys connected to the KPDPWR_N and RESIN_N pins is identified by reading corresponding bits in the interrupt real time status register. If the status has changed by the time that the interrupt is handled then a press event will be missed. Maintain a last known status variable to find unbalanced release events and simulate press events for each accordingly. Signed-off-by: David Collins Signed-off-by: Anjelique Melendez --- drivers/input/misc/pm8941-pwrkey.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/drivers/input/misc/pm8941-pwrkey.c b/drivers/input/misc/pm8941-pwrkey.c index 881943ab4d55..3519152759dd 100644 --- a/drivers/input/misc/pm8941-pwrkey.c +++ b/drivers/input/misc/pm8941-pwrkey.c @@ -76,6 +76,7 @@ struct pm8941_pwrkey { u32 code; u32 sw_debounce_time_us; ktime_t sw_debounce_end_time; + bool last_status; const struct pm8941_data *data; }; @@ -162,6 +163,16 @@ static irqreturn_t pm8941_pwrkey_irq(int irq, void *_data) pwrkey->sw_debounce_end_time = ktime_add_us(ktime_get(), pwrkey->sw_debounce_time_us); + /* + * Simulate a press event in case a release event occurred without a + * corresponding press event. + */ + if (!pwrkey->last_status && !sts) { + input_report_key(pwrkey->input, pwrkey->code, 1); + input_sync(pwrkey->input); + } + pwrkey->last_status = sts; + input_report_key(pwrkey->input, pwrkey->code, sts); input_sync(pwrkey->input);