From patchwork Thu Jun 9 08:32:08 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Claudiu Beznea X-Patchwork-Id: 12875016 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 1AE21C43334 for ; Thu, 9 Jun 2022 08:40:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id: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=Z59bbKDOUQqeb+iREvuuRcMlxlk7ZSEgMDFI7UfI66A=; b=4tZz5caXVkVAlI +toK8Atp10SGsiF+Rk7u3/BNckXT0BSPuuZ1MmTQZxN2C26opUBZEN0f6W3Vq0/2X0lSr3KKED/sw FuSFTMZJG28HLyqxPl8d1AqqDOtQbKSqUmdI/4hj3ELE3kCTNN4TJsNfiD3mgu1ZUJh1CXtOhXoA0 D8cO4bV/frXtJF7w1d64pQorq1Znie+gA2ZQh6wC5y2HojIMgcWqrdmyql7c2NldIko5u40RQFvM2 Zgt15ZyjJBXNvJFoOStehz3HSSaQ441T+DovNaTZdwM/cYZu31QlLPZo0x83FakfD46ohN82fqvLg ChjGMxbEf7dBqEfqOFYA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nzDh4-000JDB-5q; Thu, 09 Jun 2022 08:39:06 +0000 Received: from esa.microchip.iphmx.com ([68.232.153.233]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1nzDYx-000Fc6-Ru for linux-arm-kernel@lists.infradead.org; Thu, 09 Jun 2022 08:30:45 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=microchip.com; i=@microchip.com; q=dns/txt; s=mchp; t=1654763443; x=1686299443; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=0kekLaOAQqjXFiqG+SZLMmF7SrlN2r0uUk4olOvrzOo=; b=Sq6PKqTTcxR+1WRDX2db/ZKV4noUpfwRtzVLorleOs2xCn4rfnSpQlcm EkUUTytW9ntJ8DQONrCNCdn9LCGiQQ4SEZfnRiHOp+ElXrf3n9uFsaIVi 9HlQ+JjCqH09zr+xz/ACOHR5KqM3AdsWdMqBBfAnanKHT/GKHMJITwVTb y3J54GnbnPWfBPAB27wPAByhSX+ZpCYL9e8aI6KPO2OmSAuHFB/2Tm4w+ MUY7LFaseSeZ4/18I2aA/gu1XS4D6gx8Bi6uStsIwDYbFBmkS0eia9rbt Joh6UZ+T++/dRRXydDBreYJLo4Lbi0u5oY34vygceIplVfbQ9zWq/NAMu g==; X-IronPort-AV: E=Sophos;i="5.91,287,1647327600"; d="scan'208";a="177213539" Received: from unknown (HELO email.microchip.com) ([170.129.1.10]) by esa1.microchip.iphmx.com with ESMTP/TLS/AES256-SHA256; 09 Jun 2022 01:30:33 -0700 Received: from chn-vm-ex02.mchp-main.com (10.10.85.144) by chn-vm-ex04.mchp-main.com (10.10.85.152) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.17; Thu, 9 Jun 2022 01:30:33 -0700 Received: from localhost.localdomain (10.10.115.15) by chn-vm-ex02.mchp-main.com (10.10.85.144) with Microsoft SMTP Server id 15.1.2375.17 via Frontend Transport; Thu, 9 Jun 2022 01:30:29 -0700 From: Claudiu Beznea To: , , , , , , , CC: , , , , Claudiu Beznea Subject: [PATCH 11/16] iio: adc: at91-sama5d2_adc: add locking parameter to at91_adc_read_info_raw() Date: Thu, 9 Jun 2022 11:32:08 +0300 Message-ID: <20220609083213.1795019-12-claudiu.beznea@microchip.com> X-Mailer: git-send-email 2.33.0 In-Reply-To: <20220609083213.1795019-1-claudiu.beznea@microchip.com> References: <20220609083213.1795019-1-claudiu.beznea@microchip.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220609_013043_975227_1CB78F61 X-CRM114-Status: GOOD ( 11.27 ) 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 a parameter to at91_adc_read_info_raw() to specify if st->lock mutex need to be acquired. This prepares for the addition of temperature sensor code which will re-use at91_adc_read_info_raw() function to read 2 voltages for determining the real temperature. Signed-off-by: Claudiu Beznea --- drivers/iio/adc/at91-sama5d2_adc.c | 15 ++++++++++----- 1 file changed, 10 insertions(+), 5 deletions(-) diff --git a/drivers/iio/adc/at91-sama5d2_adc.c b/drivers/iio/adc/at91-sama5d2_adc.c index 1283bcf4e682..8f8fef42de84 100644 --- a/drivers/iio/adc/at91-sama5d2_adc.c +++ b/drivers/iio/adc/at91-sama5d2_adc.c @@ -1583,7 +1583,8 @@ static irqreturn_t at91_adc_interrupt(int irq, void *private) } static int at91_adc_read_info_raw(struct iio_dev *indio_dev, - struct iio_chan_spec const *chan, int *val) + struct iio_chan_spec const *chan, int *val, + bool lock) { struct at91_adc_state *st = iio_priv(indio_dev); int (*fn)(struct at91_adc_state *, int, u16 *) = NULL; @@ -1602,13 +1603,15 @@ static int at91_adc_read_info_raw(struct iio_dev *indio_dev, ret = iio_device_claim_direct_mode(indio_dev); if (ret) return ret; - mutex_lock(&st->lock); + if (lock) + mutex_lock(&st->lock); if (fn) { ret = fn(st, chan->channel, &tmp_val); *val = tmp_val; ret = at91_adc_adjust_val_osr(st, val); - mutex_unlock(&st->lock); + if (lock) + mutex_unlock(&st->lock); iio_device_release_direct_mode(indio_dev); return ret; @@ -1644,7 +1647,8 @@ static int at91_adc_read_info_raw(struct iio_dev *indio_dev, /* Needed to ACK the DRDY interruption */ at91_adc_readl(st, LCDR); - mutex_unlock(&st->lock); + if (lock) + mutex_unlock(&st->lock); iio_device_release_direct_mode(indio_dev); return ret; @@ -1658,7 +1662,8 @@ static int at91_adc_read_raw(struct iio_dev *indio_dev, switch (mask) { case IIO_CHAN_INFO_RAW: - return at91_adc_read_info_raw(indio_dev, chan, val); + return at91_adc_read_info_raw(indio_dev, chan, val, true); + case IIO_CHAN_INFO_SCALE: *val = st->vref_uv / 1000; if (chan->differential)