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authorRichard Purdie <rpurdie@rpsys.net>2005-09-06 15:19:01 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2005-09-07 16:57:53 -0700
commit347e4843fa1fc21bf542c6f086fcf5ef1ab5f58e (patch)
tree9c8afb5ef3d6093857b5d49ca59144c5d1c6c70b
parent948e12f0bd51db439659fed857971e22fbdd7527 (diff)
[PATCH] Corgi Touchscreen: Allow the driver to share the PMU
The Corgi Touchscreen driver uses the PMU as an accurate timing source which conflicts with its usage for performance monitoring. This patch allows it to be shared with other users such as oprofile. Signed-off-by: Richard Purdie <rpurdie@rpsys.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
-rw-r--r--drivers/input/touchscreen/corgi_ts.c15
1 files changed, 9 insertions, 6 deletions
diff --git a/drivers/input/touchscreen/corgi_ts.c b/drivers/input/touchscreen/corgi_ts.c
index 3f8b61cfbc3..9fcc7ca2c20 100644
--- a/drivers/input/touchscreen/corgi_ts.c
+++ b/drivers/input/touchscreen/corgi_ts.c
@@ -53,8 +53,8 @@ struct corgi_ts {
#define SyncHS() while((STATUS_HSYNC) == 0); while((STATUS_HSYNC) != 0);
#define CCNT(a) asm volatile ("mrc p14, 0, %0, C1, C0, 0" : "=r"(a))
-#define CCNT_ON() {int pmnc = 1; asm volatile ("mcr p14, 0, %0, C0, C0, 0" : : "r"(pmnc));}
-#define CCNT_OFF() {int pmnc = 0; asm volatile ("mcr p14, 0, %0, C0, C0, 0" : : "r"(pmnc));}
+#define PMNC_GET(x) asm volatile ("mrc p14, 0, %0, C0, C0, 0" : "=r"(x))
+#define PMNC_SET(x) asm volatile ("mcr p14, 0, %0, C0, C0, 0" : : "r"(x))
#define WAIT_HS_400_VGA 7013U // 17.615us
#define WAIT_HS_400_QVGA 16622U // 41.750us
@@ -96,14 +96,17 @@ static unsigned long calc_waittime(void)
static int sync_receive_data_send_cmd(int doRecive, int doSend, unsigned int address, unsigned long wait_time)
{
+ unsigned long timer1 = 0, timer2, pmnc = 0;
int pos = 0;
- unsigned long timer1 = 0, timer2;
int dosleep;
dosleep = !w100fb_get_blanking();
if (dosleep && doSend) {
- CCNT_ON();
+ PMNC_GET(pmnc);
+ if (!(pmnc & 0x01))
+ PMNC_SET(pmnc | 0x01);
+
/* polling HSync */
SyncHS();
/* get CCNT */
@@ -134,8 +137,8 @@ static int sync_receive_data_send_cmd(int doRecive, int doSend, unsigned int add
CCNT(timer2);
}
corgi_ssp_ads7846_put(cmd);
- if (dosleep)
- CCNT_OFF();
+ if (dosleep && !(pmnc & 0x01))
+ PMNC_SET(pmnc);
}
return pos;
}