From patchwork Thu Mar 6 07:05:44 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: William Breathitt Gray X-Patchwork-Id: 14003975 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 E9CFAC28B24 for ; Thu, 6 Mar 2025 08:19:00 +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:Cc:To:In-Reply-To:References :Message-Id:Content-Transfer-Encoding:Content-Type:MIME-Version:Subject:Date: From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=OvUClJvCvROtSsX/B8tse9df1SrMaEYA9Byj/NN1S5o=; b=YJ+V3JrzfHCQhVNRwi/8viC/P7 reJxDVUAUYx99JVKiPPyuZRlRJgT27ErLqvOtl2n8JRN5njolWLhe8ZnU6vQoOCNz7MC02wfv9q7f Jzx9bN6cOlGy/FJqJlPpmZ9sKHThubm04SfT8eKYsJ9NK3Wg47lGo2Uu8tjZ4/wANNWX5TJIXzAma 7H/t4khVIDZMfADrRK2b7/6s/cpdPe07QQRfyDdbMihw8eUDyc32GZS91ZEPkYugwp7sGIYfFUiWQ /hIXEyD6XMeisqEedZG8OwLB/RCJVQAjSkEY09TeF48JcMF2Ok/cSS7wUIQwAFB3Wfnp8xbFdcbEL fN6gXuMg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1tq6RQ-0000000AJTQ-3Y08; Thu, 06 Mar 2025 08:18:52 +0000 Received: from nyc.source.kernel.org ([147.75.193.91]) by bombadil.infradead.org with esmtps (Exim 4.98 #2 (Red Hat Linux)) id 1tq5Ir-0000000AAS9-0fc6 for linux-arm-kernel@lists.infradead.org; Thu, 06 Mar 2025 07:05:58 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by nyc.source.kernel.org (Postfix) with ESMTP id BC015A44A84; Thu, 6 Mar 2025 07:00:25 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 46D99C4CEED; Thu, 6 Mar 2025 07:05:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1741244756; bh=0pW/AzRF/RuX+cwE3R6LyUhFONr4bslHUHFeHtCPcU8=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=LngcmC5hlaMxZxKui39ZWm3OV7a8sOWHNSWyRPVrCBcU5tgJpETNKoILjc2V0v7Ft B5ARU6Mq3XMQhSytdSe/GTY7/AAgHbFJ9ThhpJwws0kVBImfTYqL54bS6ZnEx2lAPs NmYMDhSZmJFHtwbXfZo6DxyEvK/qeaJuJb2YQcjR2kTnIKSghdhUU3r0atc8q4c0Ju D6QVS5goosTY45uzv0oW6QxlCxRCvWKSDbe2uJ5aWBTxHDeYbzeFbcAJz19OC6hvlo bxz461xpxbEzGUNO+1/VgJe6qo7QTawxnlj/If1wFr9RTY3CW2eZ4cSlv+qkGhxyVy Ouoyas0f4ld1w== From: William Breathitt Gray Date: Thu, 06 Mar 2025 16:05:44 +0900 Subject: [PATCH 2/2] counter: microchip-tcb-capture: Add support for RC Compare MIME-Version: 1.0 Message-Id: <20250306-introduce-compare-component-v1-2-93993b3dca9c@kernel.org> References: <20250306-introduce-compare-component-v1-0-93993b3dca9c@kernel.org> In-Reply-To: <20250306-introduce-compare-component-v1-0-93993b3dca9c@kernel.org> To: csokas.bence@prolan.hu, Kamel Bouhara Cc: linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, William Breathitt Gray X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=2155; i=wbg@kernel.org; h=from:subject:message-id; bh=0pW/AzRF/RuX+cwE3R6LyUhFONr4bslHUHFeHtCPcU8=; b=owGbwMvMwCW21SPs1D4hZW3G02pJDOknPQN+hHXN4+LN2LD/lehFfe9NrXdmsbyaqhYsbN4xL 90pVNC6o5SFQYyLQVZMkaXX/OzdB5dUNX68mL8NZg4rE8gQBi5OAZiIvhDDH449rk1dhyMEJCZL Wz9msHgacf+Mt/CddxPzrnw//7RUNJnhf6Fr2Ra7ySGTe6PP/C6+9vOr06yGC2cSWqSZdBeVqnJ 4MgMA X-Developer-Key: i=wbg@kernel.org; a=openpgp; fpr=8D37CDDDE0D22528F8E89FB6B54856CABE12232B X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250305_230557_373746_45E6D587 X-CRM114-Status: GOOD ( 11.76 ) 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 In Capture mode, the RC register serves as a compare register for the Timer Counter Channel. When a the Counter Value reaches the RC value, a RC Compare event occurs (COUNTER_EVENT_THRESHOLD). This patch exposes the RC register to userspace as the 'compare' Count extension, thus allowing users to configure the threshold condition for these events. Signed-off-by: William Breathitt Gray --- drivers/counter/microchip-tcb-capture.c | 33 +++++++++++++++++++++++++++++++++ 1 file changed, 33 insertions(+) diff --git a/drivers/counter/microchip-tcb-capture.c b/drivers/counter/microchip-tcb-capture.c index 2f096a5b973d18edf5de5a2b33f2f72571deefb7..e32f8d324cb373909e0a093b14d742fa0a93e07e 100644 --- a/drivers/counter/microchip-tcb-capture.c +++ b/drivers/counter/microchip-tcb-capture.c @@ -247,6 +247,37 @@ static int mchp_tc_count_read(struct counter_device *counter, return 0; } +static int mchp_tc_count_compare_read(struct counter_device *counter, struct counter_count *count, + u64 *val) +{ + struct mchp_tc_data *const priv = counter_priv(counter); + u32 cnt; + int ret; + + ret = regmap_read(priv->regmap, ATMEL_TC_REG(priv->channel[0], RC), &cnt); + if (ret < 0) + return ret; + + *val = cnt; + + return 0; +} + +static int mchp_tc_count_compare_write(struct counter_device *counter, struct counter_count *count, + u64 val) +{ + struct mchp_tc_data *const priv = counter_priv(counter); + + if (val > U32_MAX) + return -ERANGE; + + return regmap_write(priv->regmap, ATMEL_TC_REG(priv->channel[0], RC), val); +} + +static struct counter_comp mchp_tc_count_ext[] = { + COUNTER_COMP_COMPARE(mchp_tc_count_compare_read, mchp_tc_count_compare_write), +}; + static struct counter_count mchp_tc_counts[] = { { .id = 0, @@ -255,6 +286,8 @@ 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), }, };