linux-kernel - [PATCH v2 3/6] media: dvb-frontends: atbm8830: Convert to use PI definition

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Message-ID: <20251107201005.3156118-4-andriy.shevchenko@linux.intel.com>
Date: Fri,  7 Nov 2025 21:03:01 +0100
From: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
	Hans Verkuil <hverkuil+cisco@...nel.org>,
	linux-iio@...r.kernel.org,
	chrome-platform@...ts.linux.dev,
	linux-kernel@...r.kernel.org,
	linux-media@...r.kernel.org
Cc: Jonathan Cameron <jic23@...nel.org>,
	David Lechner <dlechner@...libre.com>,
	Nuno Sá <nuno.sa@...log.com>,
	Andy Shevchenko <andy@...nel.org>,
	Benson Leung <bleung@...omium.org>,
	Guenter Roeck <groeck@...omium.org>,
	Lars-Peter Clausen <lars@...afoo.de>,
	Michael Hennerich <Michael.Hennerich@...log.com>,
	Mauro Carvalho Chehab <mchehab@...nel.org>,
	"Daniel W. S. Almeida" <dwlsalmeida@...il.com>
Subject: [PATCH v2 3/6] media: dvb-frontends: atbm8830: Convert to use PI definition

Convert to use PI definition instead of open coded value of it.

Acked-by: Hans Verkuil <hverkuil+cisco@...nel.org>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
---
 drivers/media/dvb-frontends/atbm8830.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/media/dvb-frontends/atbm8830.c b/drivers/media/dvb-frontends/atbm8830.c
index 778c865085bf..93181e0eb34f 100644
--- a/drivers/media/dvb-frontends/atbm8830.c
+++ b/drivers/media/dvb-frontends/atbm8830.c
@@ -6,7 +6,8 @@
  *    Copyright (C) 2009 David T.L. Wong <davidtlwong@...il.com>
  */
 
-#include <asm/div64.h>
+#include <linux/math64.h>
+#include <linux/units.h>
 #include <media/dvb_frontend.h>
 
 #include "atbm8830.h"
@@ -112,7 +113,7 @@ static int set_if_freq(struct atbm_state *priv, u32 freq /*in kHz*/)
 
 	if (freq != 0) {
 		/* 2 * PI * (freq - fs) / fs * (2 ^ 22) */
-		t = (u64) 2 * 31416 * (freq - fs);
+		t = (u64) 2 * DIV_ROUND_UP(PI, 10000) * (freq - fs);
 		t <<= 22;
 		do_div(t, fs);
 		do_div(t, 1000);
-- 
2.50.1