From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wm0-f67.google.com ([74.125.82.67]:40266 "EHLO mail-wm0-f67.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933405AbeFLA56 (ORCPT ); Mon, 11 Jun 2018 20:57:58 -0400 From: Karim Eshapa To: lars@metafoo.de Cc: Michael.Hennerich@analog.com, jic23@kernel.org, knaack.h@gmx.de, pmeerw@pmeerw.net, gregkh@linuxfoundation.org, linux-iio@vger.kernel.org, devel@driverdev.osuosl.org, linux-kernel@vger.kernel.org, Karim Eshapa Subject: Re: [PATCH] staging:iio:accel:adis16240: sign extend function avoiding code duplication Date: Tue, 12 Jun 2018 02:57:48 +0200 Message-Id: <20180612005748.3546-1-karim.eshapa@gmail.com> In-Reply-To: <48143872d69d231273bd2c8ed835cbf0046a263d.camel@perches.com> References: <48143872d69d231273bd2c8ed835cbf0046a263d.camel@perches.com> Sender: linux-iio-owner@vger.kernel.org List-Id: linux-iio@vger.kernel.org Use sign_extend32 kernel function instead of code duplication. Safe also for 16 bit. Signed-off-by: Karim Eshapa --- drivers/staging/iio/accel/adis16240.c | 11 ++--------- 1 file changed, 2 insertions(+), 9 deletions(-) diff --git a/drivers/staging/iio/accel/adis16240.c b/drivers/staging/iio/accel/adis16240.c index fff6d99089cc..24e525f1ef25 100644 --- a/drivers/staging/iio/accel/adis16240.c +++ b/drivers/staging/iio/accel/adis16240.c @@ -250,7 +250,6 @@ static int adis16240_read_raw(struct iio_dev *indio_dev, { struct adis *st = iio_priv(indio_dev); int ret; - int bits; u8 addr; s16 val16; @@ -287,24 +286,18 @@ static int adis16240_read_raw(struct iio_dev *indio_dev, *val = 25000 / 244 - 0x133; /* 25 C = 0x133 */ return IIO_VAL_INT; case IIO_CHAN_INFO_CALIBBIAS: - bits = 10; addr = adis16240_addresses[chan->scan_index][0]; ret = adis_read_reg_16(st, addr, &val16); if (ret) return ret; - val16 &= (1 << bits) - 1; - val16 = (s16)(val16 << (16 - bits)) >> (16 - bits); - *val = val16; + *val = sign_extend32(val16, 9); return IIO_VAL_INT; case IIO_CHAN_INFO_PEAK: - bits = 10; addr = adis16240_addresses[chan->scan_index][1]; ret = adis_read_reg_16(st, addr, &val16); if (ret) return ret; - val16 &= (1 << bits) - 1; - val16 = (s16)(val16 << (16 - bits)) >> (16 - bits); - *val = val16; + *val = sign_extend32(val16, 9); return IIO_VAL_INT; } return -EINVAL; -- 2.17.1