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[209.132.180.67]) by mx.google.com with ESMTP id xq1si16875945pab.11.2016.06.21.01.41.26; Tue, 21 Jun 2016 01:41:27 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-usb-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=neutral (body hash did not verify) header.i=@linaro.org; spf=pass (google.com: best guess record for domain of linux-usb-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-usb-owner@vger.kernel.org; dmarc=fail (p=NONE dis=NONE) header.from=linaro.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753032AbcFUIlM (ORCPT + 5 others); Tue, 21 Jun 2016 04:41:12 -0400 Received: from mail-pf0-f182.google.com ([209.85.192.182]:35478 "EHLO mail-pf0-f182.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752279AbcFUIlH (ORCPT ); Tue, 21 Jun 2016 04:41:07 -0400 Received: by mail-pf0-f182.google.com with SMTP id c2so4579363pfa.2 for ; Tue, 21 Jun 2016 01:41:07 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :in-reply-to:references; bh=c8+i61mLuhmg4uO1k/2beT2bpdQcVx7MDmSXqqTiYG8=; b=jIri0Qr9i/+ZzVzW2e5Ioym7el9H5D9sSAIdqhVefXoRTQQGcnBVQ3/3BwwJ1KGp9i 4X+MupbDqeoxAoA+PPbDfIICNNMmSvZkMd3e4z2OsFMNwdmC6cx+4M6gBLlMZj8Rd53f pNRDhFKWRkvN78F7rDcI0DTlfHNEivrE6iJxM= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:in-reply-to:references; bh=c8+i61mLuhmg4uO1k/2beT2bpdQcVx7MDmSXqqTiYG8=; b=BvtzvhI/JdS0+/8HIUf5pEprF6mFPsW0qDViX2BjLY2KvF3Xat2AX0rDgvZpzMZTFw Su71oNhhByiicUOwHRTs/N4WEEP2WNw8N+w7NWcXfUtzMhtu4VJCh3NpA1xUhx95siq2 y5K3mjV+Da/Ae2Ii11j2TeksZJnOFLl5f5+TVCetoMP+XOaSCnSJxMzKIMQiS6tm3ChQ 33wjpSKPQkR1EJ0K/xjHTO9MrnjCsiysCNFtRL2ye6RENfl+p1168msuZ8JIJZ/luhsw 8oMrr0i0W6ynwZqIUDQuFop4innlXTIq0IjXMMarocDL+dEIc6eQT0vNUBYt7HH8i9tq 4kag== X-Gm-Message-State: ALyK8tJ9JkNIKs+ryyRQdOzak9i9J7PzjdEDFUcGs05upLGL6cLwot8hMjWuotG7KN6IUQwN X-Received: by 10.98.73.198 with SMTP id r67mr27359782pfi.50.1466498466028; Tue, 21 Jun 2016 01:41:06 -0700 (PDT) Received: from baolinwangubtpc.spreadtrum.com ([175.111.195.49]) by smtp.gmail.com with ESMTPSA id w27sm23141565pfa.54.2016.06.21.01.40.59 (version=TLS1 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Tue, 21 Jun 2016 01:41:05 -0700 (PDT) From: Baolin Wang To: balbi@kernel.org, gregkh@linuxfoundation.org, sre@kernel.org, dbaryshkov@gmail.com, dwmw2@infradead.org Cc: robh@kernel.org, jun.li@nxp.com, m.szyprowski@samsung.com, ruslan.bilovol@gmail.com, peter.chen@freescale.com, stern@rowland.harvard.edu, r.baldyga@samsung.com, grygorii.strashko@ti.com, yoshihiro.shimoda.uh@renesas.com, lee.jones@linaro.org, broonie@kernel.org, ckeepax@opensource.wolfsonmicro.com, patches@opensource.wolfsonmicro.com, baolin.wang@linaro.org, linux-pm@vger.kernel.org, linux-usb@vger.kernel.org, device-mainlining@lists.linuxfoundation.org, linux-kernel@vger.kernel.org Subject: [PATCH v12 4/4] power: wm831x_power: Support USB charger current limit management Date: Tue, 21 Jun 2016 16:39:15 +0800 Message-Id: <7dc384248d51b1de0df54909f3c5550584b31357.1466497506.git.baolin.wang@linaro.org> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: References: In-Reply-To: References: Sender: linux-usb-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org Integrate with the newly added USB charger interface to limit the current we draw from the USB input based on the input device configuration identified by the USB stack, allowing us to charge more quickly from high current inputs without drawing more current than specified from others. Signed-off-by: Mark Brown Signed-off-by: Baolin Wang Acked-by: Lee Jones Acked-by: Charles Keepax Acked-by: Peter Chen Acked-by: Sebastian Reichel --- drivers/power/wm831x_power.c | 69 ++++++++++++++++++++++++++++++++++++++ include/linux/mfd/wm831x/pdata.h | 3 ++ 2 files changed, 72 insertions(+) -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-usb" 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/wm831x_power.c b/drivers/power/wm831x_power.c index 7082301..cef1812 100644 --- a/drivers/power/wm831x_power.c +++ b/drivers/power/wm831x_power.c @@ -13,6 +13,7 @@ #include #include #include +#include #include #include @@ -31,6 +32,8 @@ struct wm831x_power { char usb_name[20]; char battery_name[20]; bool have_battery; + struct usb_charger *usb_charger; + struct notifier_block usb_notify; }; static int wm831x_power_check_online(struct wm831x *wm831x, int supply, @@ -125,6 +128,43 @@ static enum power_supply_property wm831x_usb_props[] = { POWER_SUPPLY_PROP_VOLTAGE_NOW, }; +/* In milliamps */ +static const unsigned int wm831x_usb_limits[] = { + 0, + 2, + 100, + 500, + 900, + 1500, + 1800, + 550, +}; + +static int wm831x_usb_limit_change(struct notifier_block *nb, + unsigned long limit, void *data) +{ + struct wm831x_power *wm831x_power = container_of(nb, + struct wm831x_power, + usb_notify); + unsigned int i, best; + + /* Find the highest supported limit */ + best = 0; + for (i = 0; i < ARRAY_SIZE(wm831x_usb_limits); i++) { + if (limit >= wm831x_usb_limits[i] && + wm831x_usb_limits[best] < wm831x_usb_limits[i]) + best = i; + } + + dev_dbg(wm831x_power->wm831x->dev, + "Limiting USB current to %umA", wm831x_usb_limits[best]); + + wm831x_set_bits(wm831x_power->wm831x, WM831X_POWER_STATE, + WM831X_USB_ILIM_MASK, best); + + return 0; +} + /********************************************************************* * Battery properties *********************************************************************/ @@ -607,8 +647,31 @@ static int wm831x_power_probe(struct platform_device *pdev) } } + if (wm831x_pdata && wm831x_pdata->usb_gadget) { + power->usb_charger = + usb_charger_find_by_name(wm831x_pdata->usb_gadget); + if (IS_ERR(power->usb_charger)) { + ret = PTR_ERR(power->usb_charger); + dev_err(&pdev->dev, + "Failed to find USB gadget: %d\n", ret); + goto err_bat_irq; + } + + power->usb_notify.notifier_call = wm831x_usb_limit_change; + + ret = usb_charger_register_notify(power->usb_charger, + &power->usb_notify); + if (ret != 0) { + dev_err(&pdev->dev, + "Failed to register notifier: %d\n", ret); + goto err_usb_charger; + } + } + return ret; +err_usb_charger: + /* put_device on charger */ err_bat_irq: --i; for (; i >= 0; i--) { @@ -637,6 +700,12 @@ static int wm831x_power_remove(struct platform_device *pdev) struct wm831x *wm831x = wm831x_power->wm831x; int irq, i; + if (wm831x_power->usb_charger) { + usb_charger_unregister_notify(wm831x_power->usb_charger, + &wm831x_power->usb_notify); + /* Free charger */ + } + for (i = 0; i < ARRAY_SIZE(wm831x_bat_irqs); i++) { irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, diff --git a/include/linux/mfd/wm831x/pdata.h b/include/linux/mfd/wm831x/pdata.h index dcc9631..5af8399 100644 --- a/include/linux/mfd/wm831x/pdata.h +++ b/include/linux/mfd/wm831x/pdata.h @@ -126,6 +126,9 @@ struct wm831x_pdata { /** The driver should initiate a power off sequence during shutdown */ bool soft_shutdown; + /** dev_name of USB charger gadget to integrate with */ + const char *usb_gadget; + int irq_base; int gpio_base; int gpio_defaults[WM831X_GPIO_NUM];