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authorBenjamin Herrenschmidt <benh@kernel.crashing.org>2009-10-09 11:27:54 +0000
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2009-10-14 16:58:35 +1100
commit11a50873ef2b3c1c3fe99a661c22c08f35d93553 (patch)
treee40f2cf70c6193beb42994336ad3894e53004703 /arch/powerpc
parent80f506918fdaaca6b574ba931536a58ce015c7be (diff)
downloadlinux-11a50873ef2b3c1c3fe99a661c22c08f35d93553.tar.gz
linux-11a50873ef2b3c1c3fe99a661c22c08f35d93553.tar.xz
powerpc/pmac: Fix issues with sleep on some powerbooks
Since the change of how interrupts are disabled during suspend, certain PowerBook models started exhibiting various issues during suspend or resume from sleep. I finally tracked it down to the code that runs various "platform" functions (kind of little scripts extracted from the device-tree), which uses our i2c and PMU drivers expecting interrutps to work, and at a time where with the new scheme, they have been disabled. This causes timeouts internally which for some reason results in the PMU being unable to see the trackpad, among other issues, really it depends on the machine. Most of the time, we fail to properly adjust some clocks for suspend/resume so the results are not always predictable. This patch fixes it by using IRQF_TIMER for both the PMU and the I2C interrupts. I prefer doing it this way than moving the call sites since I really want those platform functions to still be called after all drivers (and before sysdevs). We also do a slight cleanup to via-pmu.c driver to make sure the ADB autopoll mask is handled correctly when doing bus resets Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc')
-rw-r--r--arch/powerpc/platforms/powermac/low_i2c.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/arch/powerpc/platforms/powermac/low_i2c.c b/arch/powerpc/platforms/powermac/low_i2c.c
index 21226b74c9b2..414ca9849f23 100644
--- a/arch/powerpc/platforms/powermac/low_i2c.c
+++ b/arch/powerpc/platforms/powermac/low_i2c.c
@@ -540,8 +540,11 @@ static struct pmac_i2c_host_kw *__init kw_i2c_host_init(struct device_node *np)
/* Make sure IRQ is disabled */
kw_write_reg(reg_ier, 0);
- /* Request chip interrupt */
- if (request_irq(host->irq, kw_i2c_irq, 0, "keywest i2c", host))
+ /* Request chip interrupt. We set IRQF_TIMER because we don't
+ * want that interrupt disabled between the 2 passes of driver
+ * suspend or we'll have issues running the pfuncs
+ */
+ if (request_irq(host->irq, kw_i2c_irq, IRQF_TIMER, "keywest i2c", host))
host->irq = NO_IRQ;
printk(KERN_INFO "KeyWest i2c @0x%08x irq %d %s\n",