From: Michal Malý <madcatxster@devoid-pointer.net>
Date: Wed, 22 Jul 2015 09:50:55 +0000 (+0200)
Subject: Update to kernel-4.2 modified fixed-point arithmetics (breaks build on
X-Git-Url: https://gitweb.devoid-pointer.net/?a=commitdiff_plain;h=3fd55c0cbc7d3746d68a75d1c239b1e074eb85af;p=KLGD_FF_plugin.git

Update to kernel-4.2 modified fixed-point arithmetics (breaks build on
pre-4.2 kernels)
---

diff --git a/klgd_ff_plugin.c b/klgd_ff_plugin.c
index 92951e2..2886760 100644
--- a/klgd_ff_plugin.c
+++ b/klgd_ff_plugin.c
@@ -4,6 +4,7 @@
 #include <linux/jiffies.h>
 
 #define DIR_TO_DEGREES(dir) (360 - ((((dir > 0xc000) ? (u32)dir + 0x4000 - 0xffff : (u32)dir + 0x4000) * 360) / 0xffff))
+#define FRAC_16 8
 #define RECALC_DELTA_T_MSEC 20
 
 static int ffpl_handle_state_change(struct klgd_plugin_private *priv, struct klgd_command_stream *s, struct ffpl_effect *eff,
@@ -154,8 +155,8 @@ bool ffpl_constant_force_to_x_y(const struct ff_effect *eff, s32 *x, s32 *y)
 
 	degrees = DIR_TO_DEGREES(eff->direction);
 	printk(KERN_NOTICE "KLGDFF: DIR_TO_DEGREES > Dir: %u, Deg: %u\n", eff->direction, degrees);
-	*x += (eff->u.constant.level * fixp_cos(degrees)) >> FRAC_N;
-	*y += (eff->u.constant.level * fixp_sin(degrees)) >> FRAC_N;
+	*x += (eff->u.constant.level * fixp_cos16(degrees)) >> FRAC_16;
+	*y += (eff->u.constant.level * fixp_sin16(degrees)) >> FRAC_16;
 
 	return true;
 }