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Wed, 30 Dec 2015 09:55:51 +0900 (KST) From: Chanwoo Choi To: tony@atomide.com, robh+dt@kernel.org, lee.jones@linaro.org, balbi@ti.com Subject: [PATCH v2 1/3] extcon: palmas: Add the support for VBUS detection by using GPIO Date: Wed, 30 Dec 2015 09:55:45 +0900 Message-id: <1451436947-22163-2-git-send-email-cw00.choi@samsung.com> X-Mailer: git-send-email 1.8.0 In-reply-to: <1451436947-22163-1-git-send-email-cw00.choi@samsung.com> References: <1451436947-22163-1-git-send-email-cw00.choi@samsung.com> X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFupikeLIzCtJLcpLzFFi42JZI2JSrDtduznMYN0SA4uD9+strn95zmox /8g5VotTB5ezWlx42sNmcf/rUUaLTY+vsVpc3jWHzWL2kn4Wi9uXeS1uN65gs2jde4TdoueR lsX+K14OfB4tzT1sHt++TmLx2LSqk83jzrU9bB6bl9R79G1Zxehx/MZ2Jo/Pm+QCOKK4bFJS czLLUov07RK4Mm7dmcFecEehYkV3A2MD4yTpLkZODgkBE4mmtauYIGwxiQv31rN1MXJxCAms YJRYNfcjI0zR5v7XzBCJpYwS89r7WSGcL4wSb1qvg1WxCWhJ7H9xgw3EFhHwkVi/+y5YB7NA E5PE7xWTmEESwgJREktbzoHtYxFQlZg7ZQdYM6+Aq8S59hdQd8hJfNjziB3E5hRwk1i7+SdY jRBQzcmN/8GGSgg8YpfYvu0BI8QgAYlvkw+xdDFyACVkJTYdYIaYIylxcMUNlgmMwgsYGVYx iqYWJBcUJ6UXGesVJ+YWl+al6yXn525iBEbR6X/P+ncw3j1gfYhRgINRiYf3hFBzmBBrYllx Ze4hRlOgDROZpUST84GxmlcSb2hsZmRhamJqbGRuaaYkzrtQ6mewkEB6YklqdmpqQWpRfFFp TmrxIUYmDk6pBsZj0VnBjzRP175qVv5yt8N9y1Jvvj0dLTpaTybK/TSOztr2ct/fd16rbvx9 85Fh+bwNZcXnz01g5Hz8TYFxverPvIhnrLFzNPsfi9j6MLBOP5/bO8th/RvBzP62tb/t+ebs snyj84hv0XvNfpalt66fdLiv8SvszQS+pnccSmbLrjZkMk9ZzTVFiaU4I9FQi7moOBEAjXsA lZ0CAAA= X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFrrOIsWRmVeSWpSXmKPExsVy+t9jAd3p2s1hBpO6NC0O3q+3uP7lOavF /CPnWC1OHVzOanHhaQ+bxf2vRxktNj2+xmpxedccNovZS/pZLG5f5rW43biCzaJ17xF2i55H Whb7r3g58Hm0NPeweXz7OonFY9OqTjaPO9f2sHlsXlLv0bdlFaPH8RvbmTw+b5IL4IhqYLTJ SE1MSS1SSM1Lzk/JzEu3VfIOjneONzUzMNQ1tLQwV1LIS8xNtVVy8QnQdcvMATpaSaEsMacU KBSQWFyspG+HaUJoiJuuBUxjhK5vSBBcj5EBGkhYw5hx684M9oI7ChUruhsYGxgnSXcxcnJI CJhIbO5/zQxhi0lcuLeerYuRi0NIYCmjxLz2flYI5wujxJvW64wgVWwCWhL7X9xgA7FFBHwk 1u++ywxSxCzQxCTxe8UksFHCAlESS1vOMYHYLAKqEnOn7ABr5hVwlTjX/oIJYp2cxIc9j9hB bE4BN4m1m3+C1QgB1Zzc+J95AiPvAkaGVYwSqQXJBcVJ6bmGeanlesWJucWleel6yfm5mxjB kfpMagfjwV3uhxgFOBiVeHhPCDWHCbEmlhVX5h5ilOBgVhLhvcACFOJNSaysSi3Kjy8qzUkt PsRoCnTYRGYp0eR8YBLJK4k3NDYxM7I0Mje0MDI2VxLnrb0UGSYkkJ5YkpqdmlqQWgTTx8TB KdXAGJu5X+B9nwlrdOrUqsJHl2av+rdD8BQbx+uLz3ItJ5vvqE/8z6chaHFtzSs/3cwF0/fY JCR+qFxssS2Mfb1vYc3jaW+ab9ZdL01QPb813M5khcKrr4U7mPfJK0zb43RmrqJQ1Qw5s2tt rzbu27B/+9GuPznzhZ4+lDr5z2D9hpVz/36pr5z8T1WJpTgj0VCLuag4EQB79NSd6gIAAA== DLP-Filter: Pass X-MTR: 20000000000000000@CPGS X-CFilter-Loop: Reflected X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20151229_165615_891543_B9CE1B2C X-CRM114-Status: GOOD ( 13.97 ) X-Spam-Score: -6.9 (------) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, george.cherian@ti.com, linux@arm.linux.org.uk, linux-kernel@vger.kernel.org, kishon@ti.com, cw00.choi@samsung.com, myungjoo.ham@samsung.com, linux-omap@vger.kernel.org, linux-arm-kernel@lists.infradead.org, rogerq@ti.com MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, 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 From: Felipe Balbi This patch support for VBUS detection by using GPIO pin. Signed-off-by: Felipe Balbi Signed-off-by: Chanwoo Choi Acked-by: Lee Jones --- drivers/extcon/extcon-palmas.c | 50 ++++++++++++++++++++++++++++++++++++++++++ include/linux/mfd/palmas.h | 3 +++ 2 files changed, 53 insertions(+) diff --git a/drivers/extcon/extcon-palmas.c b/drivers/extcon/extcon-palmas.c index 93c30a885740..885ee95a6a7b 100644 --- a/drivers/extcon/extcon-palmas.c +++ b/drivers/extcon/extcon-palmas.c @@ -216,11 +216,23 @@ static int palmas_usb_probe(struct platform_device *pdev) return PTR_ERR(palmas_usb->id_gpiod); } + palmas_usb->vbus_gpiod = devm_gpiod_get_optional(&pdev->dev, "vbus", + GPIOD_IN); + if (IS_ERR(palmas_usb->vbus_gpiod)) { + dev_err(&pdev->dev, "failed to get vbus gpio\n"); + return PTR_ERR(palmas_usb->vbus_gpiod); + } + if (palmas_usb->enable_id_detection && palmas_usb->id_gpiod) { palmas_usb->enable_id_detection = false; palmas_usb->enable_gpio_id_detection = true; } + if (palmas_usb->enable_vbus_detection && palmas_usb->vbus_gpiod) { + palmas_usb->enable_vbus_detection = false; + palmas_usb->enable_gpio_vbus_detection = true; + } + if (palmas_usb->enable_gpio_id_detection) { u32 debounce; @@ -311,6 +323,40 @@ static int palmas_usb_probe(struct platform_device *pdev) palmas_usb->vbus_irq, status); return status; } + } else if (palmas_usb->enable_gpio_vbus_detection) { + /* remux GPIO_1 as VBUSDET */ + status = palmas_update_bits(palmas, + PALMAS_PU_PD_OD_BASE, + PALMAS_PRIMARY_SECONDARY_PAD1, + PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_1_MASK, + (1 << PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_1_SHIFT)); + if (status < 0) { + dev_err(&pdev->dev, "can't remux GPIO1\n"); + return status; + } + + palmas_usb->vbus_otg_irq = regmap_irq_get_virq(palmas->irq_data, + PALMAS_VBUS_OTG_IRQ); + palmas_usb->gpio_vbus_irq = gpiod_to_irq(palmas_usb->vbus_gpiod); + if (palmas_usb->gpio_vbus_irq < 0) { + dev_err(&pdev->dev, "failed to get vbus irq\n"); + return palmas_usb->gpio_vbus_irq; + } + status = devm_request_threaded_irq(&pdev->dev, + palmas_usb->gpio_vbus_irq, + NULL, + palmas_vbus_irq_handler, + IRQF_TRIGGER_FALLING | + IRQF_TRIGGER_RISING | + IRQF_ONESHOT | + IRQF_EARLY_RESUME, + "palmas_usb_vbus", + palmas_usb); + if (status < 0) { + dev_err(&pdev->dev, + "failed to request handler for vbus irq\n"); + return status; + } } palmas_enable_irq(palmas_usb); @@ -337,6 +383,8 @@ static int palmas_usb_suspend(struct device *dev) if (device_may_wakeup(dev)) { if (palmas_usb->enable_vbus_detection) enable_irq_wake(palmas_usb->vbus_irq); + if (palmas_usb->enable_gpio_vbus_detection) + enable_irq_wake(palmas_usb->gpio_vbus_irq); if (palmas_usb->enable_id_detection) enable_irq_wake(palmas_usb->id_irq); if (palmas_usb->enable_gpio_id_detection) @@ -352,6 +400,8 @@ static int palmas_usb_resume(struct device *dev) if (device_may_wakeup(dev)) { if (palmas_usb->enable_vbus_detection) disable_irq_wake(palmas_usb->vbus_irq); + if (palmas_usb->enable_gpio_vbus_detection) + disable_irq_wake(palmas_usb->gpio_vbus_irq); if (palmas_usb->enable_id_detection) disable_irq_wake(palmas_usb->id_irq); if (palmas_usb->enable_gpio_id_detection) diff --git a/include/linux/mfd/palmas.h b/include/linux/mfd/palmas.h index 13e1d96935ed..7b2526f7bc9b 100644 --- a/include/linux/mfd/palmas.h +++ b/include/linux/mfd/palmas.h @@ -553,7 +553,9 @@ struct palmas_usb { int vbus_irq; int gpio_id_irq; + int gpio_vbus_irq; struct gpio_desc *id_gpiod; + struct gpio_desc *vbus_gpiod; unsigned long sw_debounce_jiffies; struct delayed_work wq_detectid; @@ -562,6 +564,7 @@ struct palmas_usb { bool enable_vbus_detection; bool enable_id_detection; bool enable_gpio_id_detection; + bool enable_gpio_vbus_detection; }; #define comparator_to_palmas(x) container_of((x), struct palmas_usb, comparator)