From patchwork Thu Jul 30 00:11:24 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: NeilBrown X-Patchwork-Id: 6897501 Return-Path: X-Original-To: patchwork-linux-omap@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 6D4A99F38B for ; Thu, 30 Jul 2015 00:31:43 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 73CE520459 for ; Thu, 30 Jul 2015 00:31:42 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 0994820498 for ; Thu, 30 Jul 2015 00:31:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754932AbbG3AZZ (ORCPT ); Wed, 29 Jul 2015 20:25:25 -0400 Received: from mx2.suse.de ([195.135.220.15]:43713 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754919AbbG3AZW (ORCPT ); Wed, 29 Jul 2015 20:25:22 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (charybdis-ext.suse.de [195.135.220.254]) by mx2.suse.de (Postfix) with ESMTP id 1E46DACF9; Thu, 30 Jul 2015 00:25:21 +0000 (UTC) From: NeilBrown To: Sebastian Reichel Date: Thu, 30 Jul 2015 10:11:24 +1000 Subject: [PATCH 07/13] twl4030_charger: distinguish between USB current and 'AC' current Cc: Samuel Ortiz , linux-pm@vger.kernel.org, Tony Lindgren , David Woodhouse , linux-kernel@vger.kernel.org, real GTA04 owners , Dmitry Eremin-Solenikov , Pavel Machek , linux-omap@vger.kernel.org, Lee Jones Message-ID: <20150730001124.4012.48552.stgit@noble> In-Reply-To: <20150730001113.4012.18086.stgit@noble> References: <20150730001113.4012.18086.stgit@noble> User-Agent: StGit/0.17.1-dirty MIME-Version: 1.0 Sender: linux-omap-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-omap@vger.kernel.org X-Spam-Status: No, score=-8.3 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The twl4030 charger has two current sources, 'USB' and 'AC' (presumably "Accessory Charger" because it isn't Alternating Current). If 'AC' is providing current, we should set the current limit differently to when it isn't (and so USB is used). So split 'cur' into 'usb_cur' and 'ac_cur' and use accordingly. Now we must review the current setting on any interrupt or USB event which might indicate that the charger-source has changed. Acked-by: Pavel Machek Signed-off-by: NeilBrown --- drivers/power/twl4030_charger.c | 36 +++++++++++++++++++++++++++++------- 1 file changed, 29 insertions(+), 7 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html diff --git a/drivers/power/twl4030_charger.c b/drivers/power/twl4030_charger.c index 3b7cc631bb8a..982675df21b7 100644 --- a/drivers/power/twl4030_charger.c +++ b/drivers/power/twl4030_charger.c @@ -22,6 +22,7 @@ #include #include #include +#include #define TWL4030_BCIMSTATEC 0x02 #define TWL4030_BCIICHG 0x08 @@ -101,10 +102,13 @@ struct twl4030_bci { int usb_enabled; /* - * ichg values in uA. If any are 'large', we set CGAIN to - * '1' which doubles the range for half the precision. + * ichg_* and *_cur values in uA. If any are 'large', we set + * CGAIN to '1' which doubles the range for half the + * precision. */ - unsigned int ichg_eoc, ichg_lo, ichg_hi, cur; + unsigned int ichg_eoc, ichg_lo, ichg_hi; + unsigned int usb_cur, ac_cur; + bool ac_is_active; unsigned long event; }; @@ -225,11 +229,24 @@ static int ua2regval(int ua, bool cgain) static int twl4030_charger_update_current(struct twl4030_bci *bci) { int status; + int cur; unsigned reg, cur_reg; u8 bcictl1, oldreg, fullreg; bool cgain = false; u8 boot_bci; + /* + * If AC (Accessory Charger) voltage exceeds 4.5V (MADC 11) + * and AC is enabled, set current for 'ac' + */ + if (twl4030_get_madc_conversion(11) > 4500) { + cur = bci->ac_cur; + bci->ac_is_active = true; + } else { + cur = bci->usb_cur; + bci->ac_is_active = false; + } + /* First, check thresholds and see if cgain is needed */ if (bci->ichg_eoc >= 200000) cgain = true; @@ -237,7 +254,7 @@ static int twl4030_charger_update_current(struct twl4030_bci *bci) cgain = true; if (bci->ichg_hi >= 820000) cgain = true; - if (bci->cur > 852000) + if (cur > 852000) cgain = true; status = twl4030_bci_read(TWL4030_BCICTL1, &bcictl1); @@ -318,7 +335,7 @@ static int twl4030_charger_update_current(struct twl4030_bci *bci) * And finally, set the current. This is stored in * two registers. */ - reg = ua2regval(bci->cur, cgain); + reg = ua2regval(cur, cgain); /* we have only 10 bits */ if (reg > 0x3ff) reg = 0x3ff; @@ -371,6 +388,8 @@ static int twl4030_charger_enable_usb(struct twl4030_bci *bci, bool enable) if (enable && !IS_ERR_OR_NULL(bci->transceiver)) { + twl4030_charger_update_current(bci); + /* Need to keep phy powered */ if (!bci->usb_enabled) { pm_runtime_get_sync(bci->transceiver->dev); @@ -463,6 +482,7 @@ static irqreturn_t twl4030_charger_interrupt(int irq, void *arg) struct twl4030_bci *bci = arg; dev_dbg(bci->dev, "CHG_PRES irq\n"); + twl4030_charger_update_current(bci); power_supply_changed(bci->ac); power_supply_changed(bci->usb); @@ -495,6 +515,7 @@ static irqreturn_t twl4030_bci_interrupt(int irq, void *arg) power_supply_changed(bci->ac); power_supply_changed(bci->usb); } + twl4030_charger_update_current(bci); /* various monitoring events, for now we just log them here */ if (irqs1 & (TWL4030_TBATOR2 | TWL4030_TBATOR1)) @@ -724,10 +745,11 @@ static int twl4030_bci_probe(struct platform_device *pdev) bci->ichg_eoc = 80100; /* Stop charging when current drops to here */ bci->ichg_lo = 241000; /* Low threshold */ bci->ichg_hi = 500000; /* High threshold */ + bci->ac_cur = 500000; /* 500mA */ if (allow_usb) - bci->cur = 500000; /* 500mA */ + bci->usb_cur = 500000; /* 500mA */ else - bci->cur = 100000; /* 100mA */ + bci->usb_cur = 100000; /* 100mA */ bci->dev = &pdev->dev; bci->irq_chg = platform_get_irq(pdev, 0);