From 2785cefc98051646bd1d36a627822a3f43736697 Mon Sep 17 00:00:00 2001 From: Kalle Jokiniemi Date: Tue, 29 Mar 2011 16:27:59 +0300 Subject: 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: Kalle Jokiniemi Acked-By: Heikki Krogerus Signed-off-by: Anton Vorontsov --- drivers/power/isp1704_charger.c | 22 ++++++++++++++++++++++ include/linux/power/isp1704_charger.h | 29 +++++++++++++++++++++++++++++ 2 files changed, 51 insertions(+) create mode 100644 include/linux/power/isp1704_charger.h diff --git a/drivers/power/isp1704_charger.c b/drivers/power/isp1704_charger.c index 2ad9b14a5ce3..f6d72b402a8e 100644 --- a/drivers/power/isp1704_charger.c +++ b/drivers/power/isp1704_charger.c @@ -33,6 +33,7 @@ #include #include #include +#include /* 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; diff --git a/include/linux/power/isp1704_charger.h b/include/linux/power/isp1704_charger.h new file mode 100644 index 000000000000..68096a6aa2d7 --- /dev/null +++ b/include/linux/power/isp1704_charger.h @@ -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 -- cgit v1.2.3