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isp1704_charger: Allow board specific powering routine

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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: Kalle Jokiniemi <kalle.jokiniemi@nokia.com>
Acked-By: Heikki Krogerus <heikki.krogerus@nokia.com>
Signed-off-by: Anton Vorontsov <cbouatmailru@gmail.com>
This commit is contained in:
Kalle Jokiniemi 2011-03-29 16:27:59 +03:00 committed by Anton Vorontsov
parent f10513de2a
commit 2785cefc98
2 changed files with 51 additions and 0 deletions
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22
drivers/power/isp1704_charger.c
View File

@ -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;

29
include/linux/power/isp1704_charger.h Normal file
View File

@ -0,0 +1,29 @@
/*
* 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