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Commit 6d376fcc authored by Jean Delvare's avatar Jean Delvare
Browse files

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: default avatarJean Delvare <khali@linux-fr.org>
parent c05d4902

drivers/i2c/busses/i2c-parport-light.c

+5 −1
Original line number Diff line number Diff line
@@ -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);

drivers/i2c/busses/i2c-parport.c

+5 −1
Original line number Diff line number Diff line
@@ -27,6 +27,7 @@ 
#include <linux/kernel.h>

#include <linux/module.h>

#include <linux/init.h>

#include <linux/delay.h>

#include <linux/parport.h>

#include <linux/i2c.h>

#include <linux/i2c-algo-bit.h>
@@ -185,8 +186,11 @@ static void i2c_parport_attach (struct parport *port) 
	parport_setsda(port, 1);

	parport_setscl(port, 1);

	/* Other init if needed (power on...) */

	if (adapter_parm[type].init.val)

	if (adapter_parm[type].init.val) {

		line_set(port, 1, &adapter_parm[type].init);

		/* Give powered devices some time to settle */

		msleep(100);

	}



	if (i2c_bit_add_bus(&adapter->adapter) < 0) {

		printk(KERN_ERR "i2c-parport: Unable to register with I2C\n");