mirror of https://gitee.com/openkylin/linux.git
[media] e4000: fix PLL calc bug on 32-bit arch
Fix long-lasting bug that causes tuning failure of some frequencies on 32-bit arch. Special thanks goes to Damien CABROL who finally find root of the bug. Also big thanks to Jacek Konieczny for donating "non-working" device. [crope@iki.fi: fix trivial merge conflict] [m.chehab@samsung.com: add missing header file] Reported-by: Jacek Konieczny <jajcus@jajcus.net> Reported-by: Torsten Seyffarth <t.seyffarth@gmx.de> Reported-by: Jan Taegert <jantaegert@gmx.net> Reported-by: Damien CABROL <cabrol.damien@free.fr> Tested-by: Damien CABROL <cabrol.damien@free.fr> Tested-by: Jan Taegert <jantaegert@gmx.net> Signed-off-by: Antti Palosaari <crope@iki.fi> Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
This commit is contained in:
parent
1558ec837f
commit
35c00c98a2
|
@ -19,6 +19,7 @@
|
||||||
*/
|
*/
|
||||||
|
|
||||||
#include "e4000_priv.h"
|
#include "e4000_priv.h"
|
||||||
|
#include <linux/math64.h>
|
||||||
|
|
||||||
/* write multiple registers */
|
/* write multiple registers */
|
||||||
static int e4000_wr_regs(struct e4000_priv *priv, u8 reg, u8 *val, int len)
|
static int e4000_wr_regs(struct e4000_priv *priv, u8 reg, u8 *val, int len)
|
||||||
|
@ -233,7 +234,7 @@ static int e4000_set_params(struct dvb_frontend *fe)
|
||||||
* or more.
|
* or more.
|
||||||
*/
|
*/
|
||||||
f_vco = c->frequency * e4000_pll_lut[i].mul;
|
f_vco = c->frequency * e4000_pll_lut[i].mul;
|
||||||
sigma_delta = 0x10000UL * (f_vco % priv->cfg->clock) / priv->cfg->clock;
|
sigma_delta = div_u64(0x10000ULL * (f_vco % priv->cfg->clock), priv->cfg->clock);
|
||||||
buf[0] = f_vco / priv->cfg->clock;
|
buf[0] = f_vco / priv->cfg->clock;
|
||||||
buf[1] = (sigma_delta >> 0) & 0xff;
|
buf[1] = (sigma_delta >> 0) & 0xff;
|
||||||
buf[2] = (sigma_delta >> 8) & 0xff;
|
buf[2] = (sigma_delta >> 8) & 0xff;
|
||||||
|
|
Loading…
Reference in New Issue