path: root/drivers/i2c
diff options
authorVishwanath BS <vishwanath.bs@ti.com>2010-09-30 14:14:22 +0200
committerJean Delvare <khali@endymion.delvare>2010-09-30 14:14:22 +0200
commit753419f59e10d7181e43f0b9cc5beff43ef3f7a4 (patch)
tree1655f7b2fe6bd02b21674859b32b32571eb2e42b /drivers/i2c
parent59bfee6e0682635c269fb271422e2595fa441c21 (diff)
i2c: Fix for suspend/resume issue
In current i2c core driver, call to pm_runtime_set_active from i2c_device_pm_resume will unconditionally enable i2c module and increment child count of the parent. Because of this, in CPU Idle path, i2c does not idle, preventing Core to enter retention. Also i2c module will not be suspended upon system suspend as pm_runtime_set_suspended is not called from i2c_device_pm_suspend. This issue is fixed by removing pm_runtime_set_active call from resume path which is not necessary. This fix has been tested on OMAP4430. Signed-off-by: Partha Basak <p-basak2@ti.com> Signed-off-by: Vishwanath BS <vishwanath.bs@ti.com> Acked-by: Rafael J. Wysocki <rjw@sisk.pl> Cc: Kevin Hilman <khilman@deeprootsystems.com> Cc: Ben Dooks <ben-linux@fluff.org> Signed-off-by: Jean Delvare <khali@linux-fr.org>
Diffstat (limited to 'drivers/i2c')
1 files changed, 0 insertions, 6 deletions
diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c
index 6649176de940..13927d54cb4e 100644
--- a/drivers/i2c/i2c-core.c
+++ b/drivers/i2c/i2c-core.c
@@ -216,12 +216,6 @@ static int i2c_device_pm_resume(struct device *dev)
ret = i2c_legacy_resume(dev);
- if (!ret) {
- pm_runtime_disable(dev);
- pm_runtime_set_active(dev);
- pm_runtime_enable(dev);
- }
return ret;