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[86.49.249.181]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-4891bb3d121sm49407265e9.14.2026.04.19.11.36.51 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 19 Apr 2026 11:36:51 -0700 (PDT) From: Joshua Crofts To: lars@metafoo.de, Michael.Hennerich@analog.com, jic23@kernel.org, gregkh@linuxfoundation.org Cc: dlechner@baylibre.com, nuno.sa@analog.com, andy@kernel.org, linux-iio@vger.kernel.org, linux-staging@lists.linux.dev, linux-kernel@vger.kernel.org, Joshua Crofts , Andy Shevchenko Subject: [PATCH v7] iio: frequency: ad9832: simplify bitwise math Date: Sun, 19 Apr 2026 20:36:23 +0200 Message-Id: <20260419183623.86587-1-joshua.crofts1@gmail.com> X-Mailer: git-send-email 2.34.1 Precedence: bulk X-Mailing-List: linux-iio@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Refactor the ad9832_calc_freqreg by removing the redundant u64 casts and 1L bitwise left shift and replacing the multiplication by a bit shift, as multiplying integers by a power of two is identical to a bitwise left shift. Signed-off-by: Joshua Crofts Reviewed-by: Nuno Sá Reviewed-by: Andy Shevchenko --- v7: - replaced multiplication with bitwise left shift drivers/staging/iio/frequency/ad9832.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/staging/iio/frequency/ad9832.c b/drivers/staging/iio/frequency/ad9832.c index c0b7852f1c..659821a1e2 100644 --- a/drivers/staging/iio/frequency/ad9832.c +++ b/drivers/staging/iio/frequency/ad9832.c @@ -117,8 +117,8 @@ struct ad9832_state { static unsigned long ad9832_calc_freqreg(unsigned long mclk, unsigned long fout) { - unsigned long long freqreg = (u64)fout * - (u64)((u64)1L << AD9832_FREQ_BITS); + u64 freqreg = (u64)fout << AD9832_FREQ_BITS; + do_div(freqreg, mclk); return freqreg; } -- 2.34.1