After interrupt read value from register to make sure it reached hardware. This
should fix "Spurious inteerupt" message Suggested by ian@
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Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=277632
@ -356,6 +356,8 @@ am335x_lcd_intr(void *arg)
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reg = LCD_READ4(sc, LCD_IRQSTATUS);
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LCD_WRITE4(sc, LCD_IRQSTATUS, reg);
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/* Read value back to make sure it reached the hardware */
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reg = LCD_READ4(sc, LCD_IRQSTATUS);
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if (reg & IRQ_SYNC_LOST) {
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reg = LCD_READ4(sc, LCD_RASTER_CTRL);
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@ -401,6 +403,8 @@ am335x_lcd_intr(void *arg)
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done:
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LCD_WRITE4(sc, LCD_END_OF_INT_IND, 0);
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/* Read value back to make sure it reached the hardware */
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reg = LCD_READ4(sc, LCD_END_OF_INT_IND);
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}
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static int
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