From patchwork Thu Feb 27 14:40:18 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?b?QmVuY2UgQ3PDs2vDoXM=?= X-Patchwork-Id: 13995072 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 35444C282C8 for ; Thu, 27 Feb 2025 19:37:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: Content-Type:MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:CC: To:From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=2dMTzqRKOVP6zI4y+SKJqu8AaktMKU/o6Ry3f8HrIys=; b=DLDHnc/9mNHrFmgvSqL82Su29x YCrKps87MqxpRSMpoFmqbB+pRacbEOVPhLCfSHapQm0NAX1A+ilZxip22Ye1g8pVJc4SodrIKKOD3 y8Vi4u1iJRlRvQDaDKGytymw5b+LNZxl3V8EpMCXaFZqsOdHp0kvTvcyJgOC+xzRttt7ZX/qYxKGN Lo1S7NiBzWqNcpkjnw5JPdjCYHFT5vlczDnfaRb8XwKCNZCDMBZPVxqPD+5kKaxoLtCSGePij+4gG SGb+xbwVlY0XZHgcOPpIvMP1E3sGrXj6WtspQ1VBYnTx1vRx5neIQ8C22ipzMkK+QxTZ7RYJULhD4 mJsQtH7A==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1tnjh6-00000008Thb-0XON; Thu, 27 Feb 2025 19:37:16 +0000 Received: from fw2.prolan.hu ([193.68.50.107]) by bombadil.infradead.org with esmtps (Exim 4.98 #2 (Red Hat Linux)) id 1tnf4P-00000007mqB-0yMa for linux-arm-kernel@lists.infradead.org; Thu, 27 Feb 2025 14:41:02 +0000 Received: from proxmox-mailgw.intranet.prolan.hu (localhost.localdomain [127.0.0.1]) by proxmox-mailgw.intranet.prolan.hu (Proxmox) with ESMTP id DFE30A06EC; Thu, 27 Feb 2025 15:40:59 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=prolan.hu; h=cc :cc:content-transfer-encoding:content-type:content-type:date :from:from:in-reply-to:message-id:mime-version:references :reply-to:subject:subject:to:to; s=mail; bh=2dMTzqRKOVP6zI4y+SKJ qu8AaktMKU/o6Ry3f8HrIys=; b=Mmdbh03CFS54/KUj2nEgo42yT4zFs70n5xpy jBJrzNAo60+wWrx9xmMYb99nXJ4qT4RdCiwluBUoMKFF707JouzOhdWcQfOwDUQB 32lgBa1vN2H5Op6jahoKT+lT4wju5ErXowj9CV7fi+h/NaAnN31tZX6mnACYesWR 5z+bg6dSUXD2604CN8NfX/TpQfKK8gjbjEcXHLBEH6WygxYvcFQrQmmYFaMumB7g d2gFa1AAasaiXWRXUe6mba6/eLqMNgg4vGIBuvQLjNv8iQPdZfk9oEap1rLlYGy0 LDD0Crkoumr36o45vYOQ//PO0wAoptVzX72o3eyANmg3I8iVvl7o8jCqwsqiF9KL q69t+v1q3ahicWQJSk4sEiWuSh/cWZuJAvJ0IuF6MijImxz955346RKwE7Q1nU8x otBqQUr75/BHONH2k5cBAMZ1Exs9Dp3QXeTKHQ2LBf+68jm6vUf7jNOTkWYDJwNs UWLLFCqnXzwERM1x0bmZY1PnF47kpmzIe+w/kWSXQ9QHbS1K9KV12vgXuCXa5HI5 Mt9pE70b35HkKxKLhDnQz+bG1yxbh8DwQFDXExiT5i8r54vhh1v2b2aV22bpr1FK OvYUIZiXa0giHZBHgOQRt2WIObs51DRpA4UKCghjBzE4i5QZoUwr+7xDbv1vRqhx 0NUOtwI= From: =?utf-8?b?QmVuY2UgQ3PDs2vDoXM=?= To: , , CC: =?utf-8?b?QmVuY2UgQ3PDs2vDoXM=?= , "Kamel Bouhara" Subject: [PATCH v6 1/3] include: uapi: counter: Add microchip-tcb-capture.h Date: Thu, 27 Feb 2025 15:40:18 +0100 Message-ID: <20250227144023.64530-2-csokas.bence@prolan.hu> X-Mailer: git-send-email 2.48.1 In-Reply-To: <20250227144023.64530-1-csokas.bence@prolan.hu> References: <20250227144023.64530-1-csokas.bence@prolan.hu> MIME-Version: 1.0 X-ESET-AS: R=OK;S=0;OP=CALC;TIME=1740667259;VERSION=7985;MC=472284457;ID=1452434;TRN=0;CRV=0;IPC=;SP=0;SIPS=0;PI=3;F=0 X-ESET-Antispam: OK X-EsetResult: clean, is OK X-EsetId: 37303A29ACD94852637760 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250227_064101_416061_873FAFF5 X-CRM114-Status: GOOD ( 14.26 ) 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 Add UAPI header for the microchip-tcb-capture.c driver. This header will hold the various event channels, component numbers etc. used by this driver. Signed-off-by: Bence Csókás --- Notes: New in v5 MAINTAINERS | 1 + .../linux/counter/microchip-tcb-capture.h | 22 +++++++++++++++++++ 2 files changed, 23 insertions(+) create mode 100644 include/uapi/linux/counter/microchip-tcb-capture.h diff --git a/MAINTAINERS b/MAINTAINERS index 8e047e20fbd8..d1d264210690 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -15579,6 +15579,7 @@ L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers) L: linux-iio@vger.kernel.org S: Maintained F: drivers/counter/microchip-tcb-capture.c +F: include/uapi/linux/counter/microchip-tcb-capture.h MICROCHIP USB251XB DRIVER M: Richard Leitner diff --git a/include/uapi/linux/counter/microchip-tcb-capture.h b/include/uapi/linux/counter/microchip-tcb-capture.h new file mode 100644 index 000000000000..7bda5fdef19b --- /dev/null +++ b/include/uapi/linux/counter/microchip-tcb-capture.h @@ -0,0 +1,22 @@ +/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ +/* + * Channel numbers used by the microchip-tcb-capture driver + * Copyright (C) 2025 Bence Csókás + */ +#ifndef _UAPI_COUNTER_MCHP_TCB_H_ +#define _UAPI_COUNTER_MCHP_TCB_H_ + +/* + * The driver defines the following components: + * + * Count 0 + * \__ Synapse 0 -- Signal 0 (Channel A, i.e. TIOA) + * \__ Synapse 1 -- Signal 1 (Channel B, i.e. TIOB) + */ + +enum counter_mchp_signals { + COUNTER_MCHP_SIG_TIOA, + COUNTER_MCHP_SIG_TIOB, +}; + +#endif /* _UAPI_COUNTER_MCHP_TCB_H_ */ From patchwork Thu Feb 27 14:40:19 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?b?QmVuY2UgQ3PDs2vDoXM=?= X-Patchwork-Id: 13995074 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 40B37C1B087 for ; Thu, 27 Feb 2025 19:37:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: Content-Type:MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:CC: To:From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; 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s=mail; bh=d7fmU8TJDq6KTOuPGSb8 jkfqdk5VnvNn0zD+r2C2d+k=; b=O1UizQKB3lDlHAEzczTGNJqqb/e8WZ14yN4w OsVBOvCIgun0meCOlpCdOZWbHXyS0v5KtkMGJn7YPrWo2rmLJNXrOTVY/h0d87m9 B1Vh12ik53l98gAKJ+ydcaND0iUl9sFaShIVdn+uBkwXB5Tf0c4AxA1tfYrhzBTS D8ZmHwicOiQPjB+FjLG5Y3MqefWGej0Z5aspFTrvJTVe8jJy0FccBFbtC+jblaZD ojq1JSTfdYbl6eXzfAwvIcE64GIjPGCDnhIlASMsut2WnkKc4Yt1RYv4ehoBkpMN 7TGRQsezvPcqVCpT7yUaDbxu5wPBLMwa7mCSv/P4jmlotr93V0gUSkP3n5X5PoSZ vQ3X2ipQODCGRq/5Pz2l4e6HR1LIamZzUgIdH5fYKcFDDDQ16IIE8Ry/7gPuGVwN pMWfv/b3FvzOzMIYo5VCRwwbdpggnfinylqUjYqp50DmFqEHuTj8LYVfkKren4Lx lg3hXP2xFXQ6ieK6V0cGmpO4+zRPwkh5CEB0X/OJSYN2ZW9iU5ZQ+rNa4WpPibLY /qdLSlh3Lz73fWatGHp/uOwLt2SHGYl6O0o1uPFCZm7yYQyewM/Fh8e2odFqbhM2 5U+CBh4nNR9Dh9QCGQKBKaPrCBHPdPWfggi9KY2dCOT+wfPaWaFuzB3MGz9LYQ+8 OrTfsPM= From: =?utf-8?b?QmVuY2UgQ3PDs2vDoXM=?= To: , , CC: =?utf-8?b?QmVuY2UgQ3PDs2vDoXM=?= , "Kamel Bouhara" , William Breathitt Gray Subject: [PATCH v6 2/3] counter: microchip-tcb-capture: Add IRQ handling Date: Thu, 27 Feb 2025 15:40:19 +0100 Message-ID: <20250227144023.64530-3-csokas.bence@prolan.hu> X-Mailer: git-send-email 2.48.1 In-Reply-To: <20250227144023.64530-1-csokas.bence@prolan.hu> References: <20250227144023.64530-1-csokas.bence@prolan.hu> MIME-Version: 1.0 X-ESET-AS: R=OK;S=0;OP=CALC;TIME=1740667260;VERSION=7985;MC=2154083884;ID=1452435;TRN=0;CRV=0;IPC=;SP=0;SIPS=0;PI=3;F=0 X-ESET-Antispam: OK X-EsetResult: clean, is OK X-EsetId: 37303A29ACD94852637760 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250227_144111_049056_7AB6A882 X-CRM114-Status: GOOD ( 18.54 ) 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 Add interrupt servicing to allow userspace to wait for the following events: * Change-of-state caused by external trigger * Capture of timer value into RA/RB * Compare to RC register * Overflow Signed-off-by: Bence Csókás --- Notes: New in v2 Changes in v3: * Add IRQs for Capture events (from next patch) * Add IRQ for RC Compare * Add events as bullet points to commit msg Changes in v4: * Add uapi header, names for the event channels * Add check for -EPROBE_DEFER from `of_irq_get()` Changes in v5: * Split out UAPI header introduction drivers/counter/microchip-tcb-capture.c | 75 +++++++++++++++++++ .../linux/counter/microchip-tcb-capture.h | 18 +++++ 2 files changed, 93 insertions(+) diff --git a/drivers/counter/microchip-tcb-capture.c b/drivers/counter/microchip-tcb-capture.c index 2f096a5b973d..cc12c2e2113a 100644 --- a/drivers/counter/microchip-tcb-capture.c +++ b/drivers/counter/microchip-tcb-capture.c @@ -6,18 +6,24 @@ */ #include #include +#include #include #include #include #include +#include #include #include +#include #include #define ATMEL_TC_CMR_MASK (ATMEL_TC_LDRA_RISING | ATMEL_TC_LDRB_FALLING | \ ATMEL_TC_ETRGEDG_RISING | ATMEL_TC_LDBDIS | \ ATMEL_TC_LDBSTOP) +#define ATMEL_TC_DEF_IRQS (ATMEL_TC_ETRGS | ATMEL_TC_COVFS | \ + ATMEL_TC_LDRAS | ATMEL_TC_LDRBS | ATMEL_TC_CPCS) + #define ATMEL_TC_QDEN BIT(8) #define ATMEL_TC_POSEN BIT(9) @@ -27,6 +33,7 @@ struct mchp_tc_data { int qdec_mode; int num_channels; int channel[2]; + int irq; }; static const enum counter_function mchp_tc_count_functions[] = { @@ -294,6 +301,65 @@ static const struct of_device_id atmel_tc_of_match[] = { { /* sentinel */ } }; +static irqreturn_t mchp_tc_isr(int irq, void *dev_id) +{ + struct counter_device *const counter = dev_id; + struct mchp_tc_data *const priv = counter_priv(counter); + u32 sr, mask; + + regmap_read(priv->regmap, ATMEL_TC_REG(priv->channel[0], SR), &sr); + regmap_read(priv->regmap, ATMEL_TC_REG(priv->channel[0], IMR), &mask); + + sr &= mask; + if (!(sr & ATMEL_TC_ALL_IRQ)) + return IRQ_NONE; + + if (sr & ATMEL_TC_ETRGS) + counter_push_event(counter, COUNTER_EVENT_CHANGE_OF_STATE, + COUNTER_MCHP_EVCHN_CV); + if (sr & ATMEL_TC_LDRAS) + counter_push_event(counter, COUNTER_EVENT_CAPTURE, + COUNTER_MCHP_EVCHN_RA); + if (sr & ATMEL_TC_LDRBS) + counter_push_event(counter, COUNTER_EVENT_CAPTURE, + COUNTER_MCHP_EVCHN_RB); + if (sr & ATMEL_TC_CPCS) + counter_push_event(counter, COUNTER_EVENT_THRESHOLD, + COUNTER_MCHP_EVCHN_RC); + if (sr & ATMEL_TC_COVFS) + counter_push_event(counter, COUNTER_EVENT_OVERFLOW, + COUNTER_MCHP_EVCHN_CV); + + return IRQ_HANDLED; +} + +static void mchp_tc_irq_remove(void *ptr) +{ + struct mchp_tc_data *priv = ptr; + + regmap_write(priv->regmap, ATMEL_TC_REG(priv->channel[0], IDR), ATMEL_TC_DEF_IRQS); +} + +static int mchp_tc_irq_enable(struct counter_device *const counter) +{ + struct mchp_tc_data *const priv = counter_priv(counter); + int ret = devm_request_irq(counter->parent, priv->irq, mchp_tc_isr, 0, + dev_name(counter->parent), counter); + + if (ret < 0) + return ret; + + ret = regmap_write(priv->regmap, ATMEL_TC_REG(priv->channel[0], IER), ATMEL_TC_DEF_IRQS); + if (ret < 0) + return ret; + + ret = devm_add_action_or_reset(counter->parent, mchp_tc_irq_remove, priv); + if (ret < 0) + return ret; + + return 0; +} + static void mchp_tc_clk_remove(void *ptr) { clk_disable_unprepare((struct clk *)ptr); @@ -378,6 +444,15 @@ static int mchp_tc_probe(struct platform_device *pdev) counter->num_signals = ARRAY_SIZE(mchp_tc_count_signals); counter->signals = mchp_tc_count_signals; + priv->irq = of_irq_get(np->parent, 0); + if (priv->irq == -EPROBE_DEFER) + return -EPROBE_DEFER; + if (priv->irq > 0) { + ret = mchp_tc_irq_enable(counter); + if (ret < 0) + return dev_err_probe(&pdev->dev, ret, "Failed to set up IRQ"); + } + ret = devm_counter_add(&pdev->dev, counter); if (ret < 0) return dev_err_probe(&pdev->dev, ret, "Failed to add counter\n"); diff --git a/include/uapi/linux/counter/microchip-tcb-capture.h b/include/uapi/linux/counter/microchip-tcb-capture.h index 7bda5fdef19b..ee72f1463594 100644 --- a/include/uapi/linux/counter/microchip-tcb-capture.h +++ b/include/uapi/linux/counter/microchip-tcb-capture.h @@ -12,6 +12,17 @@ * Count 0 * \__ Synapse 0 -- Signal 0 (Channel A, i.e. TIOA) * \__ Synapse 1 -- Signal 1 (Channel B, i.e. TIOB) + * + * It also supports the following events: + * + * Channel 0: + * - CV register changed + * - CV overflowed + * - RA captured + * Channel 1: + * - RB captured + * Channel 2: + * - RC compare triggered */ enum counter_mchp_signals { @@ -19,4 +30,11 @@ enum counter_mchp_signals { COUNTER_MCHP_SIG_TIOB, }; +enum counter_mchp_event_channels { + COUNTER_MCHP_EVCHN_CV = 0, + COUNTER_MCHP_EVCHN_RA = 0, + COUNTER_MCHP_EVCHN_RB, + COUNTER_MCHP_EVCHN_RC, +}; + #endif /* _UAPI_COUNTER_MCHP_TCB_H_ */ From patchwork Thu Feb 27 14:40:20 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?b?QmVuY2UgQ3PDs2vDoXM=?= X-Patchwork-Id: 13995069 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 2FAE5C282C5 for ; Thu, 27 Feb 2025 19:37:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: Content-Type:MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:CC: To:From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=RgGNxrUr8LJkEzv7yIWYEgpM/6tPuhZMATjWdJfm/zw=; b=Wm1hhLJn/RqWKnblIWIAXlIdqn yA7ipAFNGFZkFAM7lw3viZczTqfksRCX90c6/5VkJWvNm7z+DpkXkGlnr52YsMVLDKvq+HCGJcCcd mV8XtUwsdfdfXV6zZTSaCeNp5bXw2iDZOc5TuqTIjEyEv8gPBjsW8v30qZsNFZ+ehe5DpkmSwtmbB hsg8q0njByGCYUHHsj0mxveIXVAQnT08FJVU/cVqKmHMq3o6Zksbv/L/yYxiYet4uDKVQMZ7q3CyE wQJNVHsz4U7Y1MAuedbMBE8E6U2IBbDj0j8gOTUYCRxRmA/cXd9voGai8z53Hkzx557xOzV8Ocv19 Y1kiashQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1tnjh6-00000008TiD-358H; Thu, 27 Feb 2025 19:37:16 +0000 Received: from fw2.prolan.hu ([193.68.50.107]) by bombadil.infradead.org with esmtps (Exim 4.98 #2 (Red Hat Linux)) id 1tnf4S-00000007mrV-0eSf for linux-arm-kernel@lists.infradead.org; Thu, 27 Feb 2025 14:41:05 +0000 Received: from proxmox-mailgw.intranet.prolan.hu (localhost.localdomain [127.0.0.1]) by proxmox-mailgw.intranet.prolan.hu (Proxmox) with ESMTP id B910CA02D7; Thu, 27 Feb 2025 15:41:02 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=prolan.hu; h=cc :cc:content-transfer-encoding:content-type:content-type:date :from:from:in-reply-to:message-id:mime-version:references :reply-to:subject:subject:to:to; s=mail; bh=RgGNxrUr8LJkEzv7yIWY EgpM/6tPuhZMATjWdJfm/zw=; b=NXs/Siajzan1KhEv6oKWql6dKV5jRSIIaMJc qEkz6blskcKq/6QfeXZgj8sePbd/sN+hlrgRasMgcBJu071PqzNojDDv8c3DCiZe qgq2d5fxsdMSXD6kwsvzhp0LVB4xQnhFjwv46WX7byeY6uSOQ9ns3TZtS+Qx7LSi 0xBTPKReuSfI9DqkDPvGHhXN+d/w55MjZKNuIK/6UQR/I5EMkvH1Z7ULybrHZdEC kGMTIiFpZFm64PDojncyh4yYqibJaq+FWQyt0FBJDuodqq/LHgc3A/GBhfsWvK6T zogrPu5QZhvkxq2gK79Yvb6Z4Zld5qYJQdyv9gNdo1Ez8acSve2Evih8CkjCDLyw Kh0tt/IUwEw3cjh75bcPeX1xqki7T2Hka5ZW6Y7I7Ph9reJWQI4NUhf9BHg54Cxq Mchg/47qe/JE2shmX8hOYN/s4eOVvl7MKUmSbEiIYF2R/+Kl+lj6dqMK8mE/6wzD nS+2ReFSgAIA4/tLTN8hdooTj4CHKb2JCxo9ncN0FHhkYahEfskEh6xdyoDZ6A1a vfyJmti7pk8bOfrtPwckSaSXQF6zyu57PozQyPEC69Z+4sTE09FbIxfhIw2n4Tqf vCN4crg/RNOU7LrLm4Zsz1GCG+Y5HIcjHD5SzvpjiXeKIeVmU9ZNGTYHtXXfPWiM y9u2+j0= From: =?utf-8?b?QmVuY2UgQ3PDs2vDoXM=?= To: , , CC: =?utf-8?b?QmVuY2UgQ3PDs2vDoXM=?= , "Kamel Bouhara" , William Breathitt Gray Subject: [PATCH v6 3/3] counter: microchip-tcb-capture: Add capture extensions for registers RA/RB Date: Thu, 27 Feb 2025 15:40:20 +0100 Message-ID: <20250227144023.64530-4-csokas.bence@prolan.hu> X-Mailer: git-send-email 2.48.1 In-Reply-To: <20250227144023.64530-1-csokas.bence@prolan.hu> References: <20250227144023.64530-1-csokas.bence@prolan.hu> MIME-Version: 1.0 X-ESET-AS: R=OK;S=0;OP=CALC;TIME=1740667261;VERSION=7985;MC=2016132060;ID=1459478;TRN=0;CRV=0;IPC=;SP=0;SIPS=0;PI=3;F=0 X-ESET-Antispam: OK X-EsetResult: clean, is OK X-EsetId: 37303A2980D94852637760 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250227_064104_372955_CF7EDE16 X-CRM114-Status: GOOD ( 13.08 ) 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 TCB hardware is capable of capturing the timer value to registers RA and RB. Add these registers as capture extensions. Signed-off-by: Bence Csókás --- Notes: Changes in v2: * Add IRQs Changes in v3: * Move IRQs to previous patch Changes in v4: * Return the status of the regmap_*() operations * Add names for the extension numbers Changes in v6: * Remove RC, as it is not a capture register drivers/counter/microchip-tcb-capture.c | 56 +++++++++++++++++++ .../linux/counter/microchip-tcb-capture.h | 9 +++ 2 files changed, 65 insertions(+) diff --git a/drivers/counter/microchip-tcb-capture.c b/drivers/counter/microchip-tcb-capture.c index cc12c2e2113a..4ba5e29138e7 100644 --- a/drivers/counter/microchip-tcb-capture.c +++ b/drivers/counter/microchip-tcb-capture.c @@ -254,6 +254,60 @@ static int mchp_tc_count_read(struct counter_device *counter, return 0; } +static int mchp_tc_count_cap_read(struct counter_device *counter, + struct counter_count *count, size_t idx, u64 *val) +{ + struct mchp_tc_data *const priv = counter_priv(counter); + u32 cnt; + int ret; + + switch (idx) { + case COUNTER_MCHP_EXCAP_RA: + ret = regmap_read(priv->regmap, ATMEL_TC_REG(priv->channel[0], RA), &cnt); + break; + case COUNTER_MCHP_EXCAP_RB: + ret = regmap_read(priv->regmap, ATMEL_TC_REG(priv->channel[0], RB), &cnt); + break; + default: + return -EINVAL; + } + + if (!ret) + *val = cnt; + + return ret; +} + +static int mchp_tc_count_cap_write(struct counter_device *counter, + struct counter_count *count, size_t idx, u64 val) +{ + struct mchp_tc_data *const priv = counter_priv(counter); + int ret; + + if (val > U32_MAX) + return -ERANGE; + + switch (idx) { + case COUNTER_MCHP_EXCAP_RA: + ret = regmap_write(priv->regmap, ATMEL_TC_REG(priv->channel[0], RA), val); + break; + case COUNTER_MCHP_EXCAP_RB: + ret = regmap_write(priv->regmap, ATMEL_TC_REG(priv->channel[0], RB), val); + break; + default: + return -EINVAL; + } + + return ret; +} + +static DEFINE_COUNTER_ARRAY_CAPTURE(mchp_tc_cnt_cap_array, 2); + +static struct counter_comp mchp_tc_count_ext[] = { + COUNTER_COMP_ARRAY_CAPTURE(mchp_tc_count_cap_read, mchp_tc_count_cap_write, + mchp_tc_cnt_cap_array), +}; + static struct counter_count mchp_tc_counts[] = { { .id = 0, @@ -262,6 +316,8 @@ static struct counter_count mchp_tc_counts[] = { .num_functions = ARRAY_SIZE(mchp_tc_count_functions), .synapses = mchp_tc_count_synapses, .num_synapses = ARRAY_SIZE(mchp_tc_count_synapses), + .ext = mchp_tc_count_ext, + .num_ext = ARRAY_SIZE(mchp_tc_count_ext), }, }; diff --git a/include/uapi/linux/counter/microchip-tcb-capture.h b/include/uapi/linux/counter/microchip-tcb-capture.h index ee72f1463594..5c015fafe42c 100644 --- a/include/uapi/linux/counter/microchip-tcb-capture.h +++ b/include/uapi/linux/counter/microchip-tcb-capture.h @@ -12,6 +12,9 @@ * Count 0 * \__ Synapse 0 -- Signal 0 (Channel A, i.e. TIOA) * \__ Synapse 1 -- Signal 1 (Channel B, i.e. TIOB) + * \__ Extension capture0 (RA register) + * \__ Extension capture1 (RB register) + * \__ Extension capture2 (RC register) * * It also supports the following events: * @@ -30,6 +33,12 @@ enum counter_mchp_signals { COUNTER_MCHP_SIG_TIOB, }; +enum counter_mchp_capture_extensions { + COUNTER_MCHP_EXCAP_RA, + COUNTER_MCHP_EXCAP_RB, + COUNTER_MCHP_EXCAP_RC, +}; + enum counter_mchp_event_channels { COUNTER_MCHP_EVCHN_CV = 0, COUNTER_MCHP_EVCHN_RA = 0,