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path: root/drivers/input/touchscreen
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Diffstat (limited to 'drivers/input/touchscreen')
-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 3f8b61cfbc37..9fcc7ca2c208 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;
}