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authorJean Delvare <khali@linux-fr.org>2010-03-02 12:23:41 +0100
committerJean Delvare <khali@linux-fr.org>2010-03-02 12:23:41 +0100
commit6d376fcc28d98f7f8f652755ae4dca1ff7240563 (patch)
treef238f98bbbf2fb3e2f270571404d3c9a91c5281a /drivers/i2c/busses/i2c-parport-light.c
parentc05d490234b7cf1715d9568d2041d9bc598a0b45 (diff)
downloadop-kernel-dev-6d376fcc28d98f7f8f652755ae4dca1ff7240563.zip
op-kernel-dev-6d376fcc28d98f7f8f652755ae4dca1ff7240563.tar.gz
i2c-parport: Give powered devices some time to settle
When the i2c-parport adapter is reponsible for powering devices, it would seem reasonable to give them some time to settle before trying to access them. Signed-off-by: Jean Delvare <khali@linux-fr.org>
Diffstat (limited to 'drivers/i2c/busses/i2c-parport-light.c')
-rw-r--r--drivers/i2c/busses/i2c-parport-light.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/i2c/busses/i2c-parport-light.c b/drivers/i2c/busses/i2c-parport-light.c
index 322c569..5383f64 100644
--- a/drivers/i2c/busses/i2c-parport-light.c
+++ b/drivers/i2c/busses/i2c-parport-light.c
@@ -27,6 +27,7 @@
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
+#include <linux/delay.h>
#include <linux/platform_device.h>
#include <linux/ioport.h>
#include <linux/i2c.h>
@@ -127,8 +128,11 @@ static int __devinit i2c_parport_probe(struct platform_device *pdev)
parport_setsda(NULL, 1);
parport_setscl(NULL, 1);
/* Other init if needed (power on...) */
- if (adapter_parm[type].init.val)
+ if (adapter_parm[type].init.val) {
line_set(1, &adapter_parm[type].init);
+ /* Give powered devices some time to settle */
+ msleep(100);
+ }
parport_adapter.dev.parent = &pdev->dev;
err = i2c_bit_add_bus(&parport_adapter);
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