CVS commit: src/sys/arch/arm/rockchip

[Jared D. McNeill]

Module Name:    src
Committed By:   jmcneill
Date:           Sat Jun 16 13:24:04 UTC 2018

Modified Files:
        src/sys/arch/arm/rockchip: rk_cru_pll.c

Log Message:
Fix rate calculation of fractional mode PLLs


To generate a diff of this commit:
cvs rdiff -u -r1.1 -r1.2 src/sys/arch/arm/rockchip/rk_cru_pll.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.


Modified files:

Index: src/sys/arch/arm/rockchip/rk_cru_pll.c
diff -u src/sys/arch/arm/rockchip/rk_cru_pll.c:1.1 src/sys/arch/arm/rockchip/rk_cru_pll.c:1.2
--- src/sys/arch/arm/rockchip/rk_cru_pll.c:1.1	Sat Jun 16 00:19:04 2018
+++ src/sys/arch/arm/rockchip/rk_cru_pll.c	Sat Jun 16 13:24:04 2018
@@ -1,4 +1,4 @@
-/* $NetBSD: rk_cru_pll.c,v 1.1 2018/06/16 00:19:04 jmcneill Exp $ */
+/* $NetBSD: rk_cru_pll.c,v 1.2 2018/06/16 13:24:04 jmcneill Exp $ */
 
 /*-
  * Copyright (c) 2018 Jared McNeill <jmcne...@invisible.ca>
@@ -27,7 +27,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: rk_cru_pll.c,v 1.1 2018/06/16 00:19:04 jmcneill Exp $");
+__KERNEL_RCSID(0, "$NetBSD: rk_cru_pll.c,v 1.2 2018/06/16 13:24:04 jmcneill Exp $");
 
 #include <sys/param.h>
 #include <sys/bus.h>
@@ -96,7 +96,7 @@ rk_cru_pll_get_rate(struct rk_cru_softc 
 		foutvco = fref / refdiv * fbdiv;
 	} else {
 		/* fractional mode */
-		foutvco = fref / refdiv * (fbdiv + fracdiv / 224);
+		foutvco = fref / refdiv * fbdiv + ((fref * fracdiv) >> 24);
 	}
 	foutpostdiv = foutvco / postdiv1 / postdiv2;