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Commit 2948c01c authored by Martin Kepplinger's avatar Martin Kepplinger Committed by Mauro Carvalho Chehab
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[media] stb0899: use sign_extend32() for sign extension 



Instead of implement its own logic, use the already-defined one.

Signed-off-by: default avatarMartin Kepplinger <martink@posteo.de>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@osg.samsung.com>
parent 17d4d6ae

drivers/media/dvb-frontends/stb0899_algo.c

+2 −3
Original line number Original line Diff line number Diff line
@@ -19,6 +19,7 @@ 
	Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

	Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

*/

*/





#include <linux/bitops.h>

#include "stb0899_drv.h"

#include "stb0899_drv.h"

#include "stb0899_priv.h"

#include "stb0899_priv.h"

#include "stb0899_reg.h"

#include "stb0899_reg.h"
@@ -1490,9 +1491,7 @@ enum stb0899_status stb0899_dvbs2_algo(struct stb0899_state *state) 
		/* Store signal parameters	*/

		/* Store signal parameters	*/

		offsetfreq = STB0899_READ_S2REG(STB0899_S2DEMOD, CRL_FREQ);

		offsetfreq = STB0899_READ_S2REG(STB0899_S2DEMOD, CRL_FREQ);





		/* sign extend 30 bit value before using it in calculations */

		offsetfreq = sign_extend32(offsetfreq, 29);

		if (offsetfreq & (1 << 29))

			offsetfreq |= -1 << 30;





		offsetfreq = offsetfreq / ((1 << 30) / 1000);

		offsetfreq = offsetfreq / ((1 << 30) / 1000);

		offsetfreq *= (internal->master_clk / 1000000);

		offsetfreq *= (internal->master_clk / 1000000);