From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756636AbdLVPK2 (ORCPT ); Fri, 22 Dec 2017 10:10:28 -0500 Received: from esa1.microchip.iphmx.com ([68.232.147.91]:56578 "EHLO esa1.microchip.iphmx.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753954AbdLVPKV (ORCPT ); Fri, 22 Dec 2017 10:10:21 -0500 X-IronPort-AV: E=Sophos;i="5.45,441,1508828400"; d="scan'208";a="10402505" From: Eugen Hristev To: , , , , , , , , , CC: Eugen Hristev Subject: [PATCH 11/14] iio: adc: at91-sama5d2_adc: optimize scan index for diff channels Date: Fri, 22 Dec 2017 17:07:18 +0200 Message-ID: <1513955241-10985-12-git-send-email-eugen.hristev@microchip.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1513955241-10985-1-git-send-email-eugen.hristev@microchip.com> References: <1513955241-10985-1-git-send-email-eugen.hristev@microchip.com> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Optimize the scan index for the differential channels. Before, it was single channel count + index of the first single channel number of the differential pair. (e.g. 11+0, +2, +4, etc.) Divide that number by two (since it's always even), and add it up as a scan index to have consecutive numbered channels in the index. Signed-off-by: Eugen Hristev --- drivers/iio/adc/at91-sama5d2_adc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/iio/adc/at91-sama5d2_adc.c b/drivers/iio/adc/at91-sama5d2_adc.c index 7b9febc..9610393 100644 --- a/drivers/iio/adc/at91-sama5d2_adc.c +++ b/drivers/iio/adc/at91-sama5d2_adc.c @@ -209,7 +209,7 @@ .channel = num, \ .channel2 = num2, \ .address = addr, \ - .scan_index = num + AT91_SAMA5D2_SINGLE_CHAN_CNT, \ + .scan_index = (num >> 1) + AT91_SAMA5D2_SINGLE_CHAN_CNT,\ .scan_type = { \ .sign = 's', \ .realbits = 12, \ -- 2.7.4