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After interrupt read value from register to make sure it reached hardware. This

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should fix "Spurious inteerupt" message

Suggested by ian@
This commit is contained in:
Oleksandr Tymoshenko 2015-01-24 01:53:28 +00:00
parent b4e360d239
commit 5967db8dca
1 changed files with 4 additions and 0 deletions
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4
sys/arm/ti/am335x/am335x_lcd.c
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@ -356,6 +356,8 @@ am335x_lcd_intr(void *arg)
reg = LCD_READ4(sc, LCD_IRQSTATUS);
LCD_WRITE4(sc, LCD_IRQSTATUS, reg);
/* Read value back to make sure it reached the hardware */
reg = LCD_READ4(sc, LCD_IRQSTATUS);
if (reg & IRQ_SYNC_LOST) {
reg = LCD_READ4(sc, LCD_RASTER_CTRL);
@ -401,6 +403,8 @@ am335x_lcd_intr(void *arg)
done:
LCD_WRITE4(sc, LCD_END_OF_INT_IND, 0);
/* Read value back to make sure it reached the hardware */
reg = LCD_READ4(sc, LCD_END_OF_INT_IND);
}
static int