Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757250Ab2EHVlo (ORCPT ); Tue, 8 May 2012 17:41:44 -0400 Received: from cantor2.suse.de ([195.135.220.15]:50478 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756727Ab2EHVlm (ORCPT ); Tue, 8 May 2012 17:41:42 -0400 From: NeilBrown To: Samuel Ortiz , Felipe Balbi , Anton Vorontsov , David Woodhouse Date: Wed, 09 May 2012 07:40:40 +1000 Subject: [PATCH 3/4] power_supply/MFD: twl4030_charger: Allow charger to control the regulator that feeds it. Cc: Grazvydas Ignotas , Greg Kroah-Hartman , linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, Tero Kristo , NeilBrown Message-ID: <20120508214040.2844.5662.stgit@notabene.brown> In-Reply-To: <20120508213518.2844.95446.stgit@notabene.brown> References: <20120508213518.2844.95446.stgit@notabene.brown> User-Agent: StGIT/0.14.3 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3607 Lines: 109 The charger needs usb3v1 to be running, so add a new consumer to keep it running. This allows the charger to draw current even when the USB driver has powered down. Acked-by: Tero Kristo Signed-off-by: NeilBrown --- drivers/mfd/twl-core.c | 9 +++++---- drivers/power/twl4030_charger.c | 15 +++++++++++++++ 2 files changed, 20 insertions(+), 4 deletions(-) diff --git a/drivers/mfd/twl-core.c b/drivers/mfd/twl-core.c index 7c2267e..4cbf285 100644 --- a/drivers/mfd/twl-core.c +++ b/drivers/mfd/twl-core.c @@ -723,8 +723,9 @@ add_children(struct twl4030_platform_data *pdata, unsigned irq_base, static struct regulator_consumer_supply usb1v8 = { .supply = "usb1v8", }; - static struct regulator_consumer_supply usb3v1 = { - .supply = "usb3v1", + static struct regulator_consumer_supply usb3v1[] = { + { .supply = "usb3v1" }, + { .supply = "bci3v1" }, }; /* First add the regulators so that they can be used by transceiver */ @@ -752,7 +753,7 @@ add_children(struct twl4030_platform_data *pdata, unsigned irq_base, return PTR_ERR(child); child = add_regulator_linked(TWL4030_REG_VUSB3V1, - &usb_fixed, &usb3v1, 1, + &usb_fixed, usb3v1, 2, features); if (IS_ERR(child)) return PTR_ERR(child); @@ -773,7 +774,7 @@ add_children(struct twl4030_platform_data *pdata, unsigned irq_base, if (twl_has_regulator() && child) { usb1v5.dev_name = dev_name(child); usb1v8.dev_name = dev_name(child); - usb3v1.dev_name = dev_name(child); + usb3v1[0].dev_name = dev_name(child); } } if (twl_has_usb() && pdata->usb && twl_class_is_6030()) { diff --git a/drivers/power/twl4030_charger.c b/drivers/power/twl4030_charger.c index 0511610..bbda083 100644 --- a/drivers/power/twl4030_charger.c +++ b/drivers/power/twl4030_charger.c @@ -21,6 +21,7 @@ #include #include #include +#include #define TWL4030_BCIMSTATEC 0x02 #define TWL4030_BCIICHG 0x08 @@ -86,6 +87,8 @@ struct twl4030_bci { struct work_struct work; int irq_chg; int irq_bci; + struct regulator *usb_reg; + int usb_enabled; unsigned long event; }; @@ -183,6 +186,12 @@ static int twl4030_charger_enable_usb(struct twl4030_bci *bci, bool enable) return -EACCES; } + /* Need to keep regulator on */ + if (!bci->usb_enabled) { + regulator_enable(bci->usb_reg); + bci->usb_enabled = 1; + } + /* forcing the field BCIAUTOUSB (BOOT_BCI[1]) to 1 */ ret = twl4030_clear_set_boot_bci(0, TWL4030_BCIAUTOUSB); if (ret < 0) @@ -193,6 +202,10 @@ static int twl4030_charger_enable_usb(struct twl4030_bci *bci, bool enable) TWL4030_USBFASTMCHG, TWL4030_BCIMFSTS4); } else { ret = twl4030_clear_set_boot_bci(TWL4030_BCIAUTOUSB, 0); + if (bci->usb_enabled) { + regulator_disable(bci->usb_reg); + bci->usb_enabled = 0; + } } return ret; @@ -511,6 +524,8 @@ static int __init twl4030_bci_probe(struct platform_device *pdev) bci->usb.num_properties = ARRAY_SIZE(twl4030_charger_props); bci->usb.get_property = twl4030_bci_get_property; + bci->usb_reg = regulator_get(bci->dev, "bci3v1"); + ret = power_supply_register(&pdev->dev, &bci->usb); if (ret) { dev_err(&pdev->dev, "failed to register usb: %d\n", ret); -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/