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Date: Fri, 22 Dec 2017 17:07:18 +0200 From: Eugen Hristev <eugen.hristev@...rochip.com> To: <nicolas.ferre@...rochip.com>, <ludovic.desroches@...rochip.com>, <alexandre.belloni@...e-electrons.com>, <linux-iio@...r.kernel.org>, <linux-arm-kernel@...ts.infradead.org>, <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>, <jic23@...nel.org>, <linux-input@...r.kernel.org>, <dmitry.torokhov@...il.com> CC: Eugen Hristev <eugen.hristev@...rochip.com> Subject: [PATCH 11/14] iio: adc: at91-sama5d2_adc: optimize scan index for diff channels 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 <eugen.hristev@...rochip.com> --- 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
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