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Commit 2785cefc authored by Kalle Jokiniemi's avatar Kalle Jokiniemi Committed by Anton Vorontsov
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isp1704_charger: Allow board specific powering routine 



The ISP1704/1707 chip can be put to full power down
state by asserting the CHIP_SEL line. This patch enables
platform or board specific hooks to put the device into
power down mode in case not needed.

This patch is a preparation for enabling this powering
routine in n900 (rx-51) devices.

Thanks to Heikki Krogerus for helping out with the patch.

Signed-off-by: default avatarKalle Jokiniemi <kalle.jokiniemi@nokia.com>
Acked-By: default avatarHeikki Krogerus <heikki.krogerus@nokia.com>
Signed-off-by: default avatarAnton Vorontsov <cbouatmailru@gmail.com>
parent f10513de

drivers/power/isp1704_charger.c

+22 −0
Original line number Diff line number Diff line
@@ -33,6 +33,7 @@ 
#include <linux/usb/ulpi.h>

#include <linux/usb/ch9.h>

#include <linux/usb/gadget.h>

#include <linux/power/isp1704_charger.h>



/* Vendor specific Power Control register */

#define ISP1704_PWR_CTRL		0x3d
@@ -70,6 +71,18 @@ struct isp1704_charger { 
	unsigned		max_power;

};



/*

 * Disable/enable the power from the isp1704 if a function for it

 * has been provided with platform data.

 */

static void isp1704_charger_set_power(struct isp1704_charger *isp, bool on)

{

	struct isp1704_charger_data	*board = isp->dev->platform_data;



	if (board->set_power)

		board->set_power(on);

}



/*

 * Determine is the charging port DCP (dedicated charger) or CDP (Host/HUB

 * chargers).
@@ -222,6 +235,9 @@ static void isp1704_charger_work(struct work_struct *data) 


	mutex_lock(&lock);



	if (event != USB_EVENT_NONE)

		isp1704_charger_set_power(isp, 1);



	switch (event) {

	case USB_EVENT_VBUS:

		isp->online = true;
@@ -269,6 +285,8 @@ static void isp1704_charger_work(struct work_struct *data) 
		 */

		if (isp->otg->gadget)

			usb_gadget_disconnect(isp->otg->gadget);



		isp1704_charger_set_power(isp, 0);

		break;

	case USB_EVENT_ENUMERATED:

		if (isp->present)
@@ -394,6 +412,8 @@ static int __devinit isp1704_charger_probe(struct platform_device *pdev) 
	isp->dev = &pdev->dev;

	platform_set_drvdata(pdev, isp);



	isp1704_charger_set_power(isp, 1);



	ret = isp1704_test_ulpi(isp);

	if (ret < 0)

		goto fail1;
@@ -434,6 +454,7 @@ static int __devinit isp1704_charger_probe(struct platform_device *pdev) 


	/* Detect charger if VBUS is valid (the cable was already plugged). */

	ret = otg_io_read(isp->otg, ULPI_USB_INT_STS);

	isp1704_charger_set_power(isp, 0);

	if ((ret & ULPI_INT_VBUS_VALID) && !isp->otg->default_a) {

		isp->event = USB_EVENT_VBUS;

		schedule_work(&isp->work);
@@ -459,6 +480,7 @@ static int __devexit isp1704_charger_remove(struct platform_device *pdev) 
	otg_unregister_notifier(isp->otg, &isp->nb);

	power_supply_unregister(&isp->psy);

	otg_put_transceiver(isp->otg);

	isp1704_charger_set_power(isp, 0);

	kfree(isp);



	return 0;

include/linux/power/isp1704_charger.h

0 → 100644
+29 −0
Original line number Diff line number Diff line 
/*

 * ISP1704 USB Charger Detection driver

 *

 * Copyright (C) 2011 Nokia Corporation

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; either version 2 of the License, or

 * (at your option) any later version.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA

 */





#ifndef __ISP1704_CHARGER_H

#define __ISP1704_CHARGER_H



struct isp1704_charger_data {

	void		(*set_power)(bool on);

};



#endif