From mboxrd@z Thu Jan 1 00:00:00 1970 From: 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> References: <1513955241-10985-1-git-send-email-eugen.hristev@microchip.com> Mime-Version: 1.0 Content-Type: text/plain Return-path: In-Reply-To: <1513955241-10985-1-git-send-email-eugen.hristev@microchip.com> Sender: linux-kernel-owner@vger.kernel.org To: nicolas.ferre@microchip.com, ludovic.desroches@microchip.com, alexandre.belloni@free-electrons.com, linux-iio@vger.kernel.org, linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, jic23@kernel.org, linux-input@vger.kernel.org, dmitry.torokhov@gmail.com Cc: Eugen Hristev List-Id: devicetree@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