Re: [Ltib] anti-freeze imx27 pm patch

[Peter Wurmsdobler]

Hello Stuart,

the mx31 patch applied to the mx27 2007-12-19, the christmas release, 
appears to be working. I have to test it more intensively, but for now I 
could not make it freeze. The resulting patch is attached.

peter

diff --exclude CVS -uNr linux-2.6.22/drivers/input/keyboard/mxc_keyb.c 
linux-2.6.22.modified/drivers/input/keyboard/mxc_keyb.c
--- linux-2.6.22/drivers/input/keyboard/mxc_keyb.c      2008-02-22 
15:21:06.000000000 +0000
+++ linux-2.6.22.modified/drivers/input/keyboard/mxc_keyb.c     2008-02-22 
15:14:01.000000000 +0000
@@ -622,6 +622,11 @@
                 */
                reg_val &= ~KBD_STAT_KDIE;
                __raw_writew(reg_val, KPSR);
+#ifdef CONFIG_PM
+                } else if (reg_val & KBD_STAT_KPKR) {
+                                reg_val &= ~KBD_STAT_KRIE;
+                                __raw_writew(reg_val, KPSR);
+#endif
        } else {
                /* spurious interrupt */
                return IRQ_RETVAL(0);
@@ -673,9 +678,16 @@
  */
 static int mxc_kpp_suspend(struct platform_device *pdev, pm_message_t state)
 {
+    unsigned short reg_val;
+
        del_timer(&kpp_dev.poll_timer);
 
        if (device_may_wakeup(&pdev->dev)) {
+           reg_val = __raw_readw(KPSR);
+               if ((reg_val & KBD_STAT_KDIE) == 0) {
+                   reg_val |= KBD_STAT_KRIE;
+                   __raw_writew(reg_val, KPSR);
+                   }
                enable_irq_wake(keypad->irq);
        } else {
                disable_irq(keypad->irq);