From mboxrd@z Thu Jan 1 00:00:00 1970 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=-8.6 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_2 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 B3758C433E0 for ; Sat, 16 May 2020 17:15:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9137A207CB for ; Sat, 16 May 2020 17:15:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1589649328; bh=UFcxAeFE3SPRLnvNasRhmzG8Bcy6a0fnOsbSJPfdJ60=; h=Date:From:To:Cc:Subject:In-Reply-To:References:List-ID:From; b=r7vdimttrkQQMqNysKGHZO2cJ2f/Eoe/Lk9eBsdKE5tAYuzehU48XF2dTVBzIbCw+ BzNowpdQme0yd0NuYv2+DVckg1i6x1i/GAB10Uo02TEH82mDpxxm1sObi9W1fJrN3z mmF740QV4xVpjkLznRvLfwxe9qWWy3amSaqhsyYI= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726257AbgEPRP2 (ORCPT ); Sat, 16 May 2020 13:15:28 -0400 Received: from mail.kernel.org ([198.145.29.99]:45872 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726238AbgEPRP1 (ORCPT ); Sat, 16 May 2020 13:15:27 -0400 Received: from archlinux (cpc149474-cmbg20-2-0-cust94.5-4.cable.virginm.net [82.4.196.95]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 618AC20756; Sat, 16 May 2020 17:15:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1589649327; bh=UFcxAeFE3SPRLnvNasRhmzG8Bcy6a0fnOsbSJPfdJ60=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=IjDYS2+lL53IsLZmPGS9PxVLjYvUEWxRk58arwUdxRBAHEiERoPkdkSur8zVAV4gT Vaj8DkhvkYppWWOJRcNVj10K7VXZ7TbgtabI+8uWRGJj06kVrWQq7bLDdTMQWb4nWo rQqIhLe0OgGTQRACXGKGTMQxb3ZygaGgkpg7lCiI= Date: Sat, 16 May 2020 18:15:22 +0100 From: Jonathan Cameron To: Alexandru Ardelean Cc: , , , , , , , , , , Subject: Re: [PATCH v2 2/8] iio: at91-sama5d2_adc: pass ref to IIO device via param for int function Message-ID: <20200516181522.096433bc@archlinux> In-Reply-To: <20200514131710.84201-3-alexandru.ardelean@analog.com> References: <20200514131710.84201-1-alexandru.ardelean@analog.com> <20200514131710.84201-3-alexandru.ardelean@analog.com> X-Mailer: Claws Mail 3.17.5 (GTK+ 2.24.32; x86_64-pc-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-iio-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-iio@vger.kernel.org On Thu, 14 May 2020 16:17:04 +0300 Alexandru Ardelean wrote: > Since there will be some changes to how iio_priv_to_dev() is implemented, > it could be that the helper becomes a bit slower, as it will be hidden away > in the IIO core. > > For this driver, the IIO device can be passed directly as a parameter to > the at91_adc_no_pen_detect_interrupt() function, thus making it immune to > the change of iio_priv_to_dev(). > The function gets called in an interrupt context. > > Signed-off-by: Alexandru Ardelean Looks sensible to me. We could get the state structure from the iio_dev inside that function, but then it would be different from the pen version, so I think what you have here is probably best option. Jonathan > --- > drivers/iio/adc/at91-sama5d2_adc.c | 7 +++---- > 1 file changed, 3 insertions(+), 4 deletions(-) > > diff --git a/drivers/iio/adc/at91-sama5d2_adc.c b/drivers/iio/adc/at91-sama5d2_adc.c > index 9abbbdcc7420..822b8782acba 100644 > --- a/drivers/iio/adc/at91-sama5d2_adc.c > +++ b/drivers/iio/adc/at91-sama5d2_adc.c > @@ -1275,10 +1275,9 @@ static void at91_adc_pen_detect_interrupt(struct at91_adc_state *st) > st->touch_st.touching = true; > } > > -static void at91_adc_no_pen_detect_interrupt(struct at91_adc_state *st) > +static void at91_adc_no_pen_detect_interrupt(struct iio_dev *indio_dev, > + struct at91_adc_state *st) > { > - struct iio_dev *indio_dev = iio_priv_to_dev(st); > - > at91_adc_writel(st, AT91_SAMA5D2_TRGR, > AT91_SAMA5D2_TRGR_TRGMOD_NO_TRIGGER); > at91_adc_writel(st, AT91_SAMA5D2_IDR, AT91_SAMA5D2_IER_NOPEN | > @@ -1318,7 +1317,7 @@ static irqreturn_t at91_adc_interrupt(int irq, void *private) > at91_adc_pen_detect_interrupt(st); > } else if ((status & AT91_SAMA5D2_IER_NOPEN)) { > /* nopen detected IRQ */ > - at91_adc_no_pen_detect_interrupt(st); > + at91_adc_no_pen_detect_interrupt(indio, st); > } else if ((status & AT91_SAMA5D2_ISR_PENS) && > ((status & rdy_mask) == rdy_mask)) { > /* periodic trigger IRQ - during pen sense */